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Conformed to Federal Register version
SECURITIES AND EXCHANGE COMMISSION
[Release No. 34-106372; File No. PCAOB-2026-01]
September 15, 2026.
Public Company Accounting Oversight Board; Notice of Filing of Proposed Rules
on Amendments to QC 1000, A Firm’s System of Quality Control, and Related Rule
and Forms
Pursuant to section 107(b) of the Sarbanes-Oxley Act of 2002 (the “Act”), notice
is hereby given that on September 10, 2026, the Public Company Accounting Oversight
Board (the “Board” or the “PCAOB”) filed with the Securities and Exchange
Commission (the “Commission” or the “SEC”) the proposed rules described in items I
and II below, which items have been prepared by the Board. On September 14, 2026, the
Board filed with the Commission a technical correction to one of the proposed rules. The
Commission is publishing this notice to solicit comments on the proposed rules from
interested persons.
I.

Board’s Statement of the Terms of Substance of the Proposed Rules
On September 9, 2026, the Board adopted proposed rule amendments to

QC 1000, A Firm’s System of Quality Control, related amendments to PCAOB
Rule 2203A, PCAOB forms, and technical amendments to AS 2101, Audit Planning.
(collectively, the “proposed rules”). On September 11, 2026, the Board adopted a
technical correction to the proposed rule amendments to QC 1000. The text of the
proposed rules appears in Exhibit A to the SEC Filing Form 19b-4 and is available on the
Board’s website at https://pcaobus.org/about/rules-rulemaking/rulemakingdockets/docket-057.

II.

Board’s Statement of the Purpose of, and Statutory Basis for, the Proposed
Rules
In its filing with the Commission, the Board included statements concerning the

purpose of and basis for the proposed rules and discussed any comments it received on
the proposed rules. The text of these statements may be examined at the places specified
in Item IV below. The Board has prepared summaries, set forth in sections A, B, and C
below, of the most significant aspects of such statements. In addition, to the extent
necessary, the Board is requesting that the Commission approve the proposed rules
pursuant to section 103(a)(3)(C) of the Act for application to audits of emerging growth
companies (“EGCs”), as that term is defined in section 3(a)(80) of the Securities
Exchange Act of 1934 (“Exchange Act”). The Board’s request is set forth in section D.
A.

Board’s Statement of the Purpose of, and Statutory Basis for, the Proposed Rules
(a)

Purpose

The Board adopted QC 1000, A Firm’s System of Quality Control (“QC 1000”),
on May 13, 2024, 1 to lead registered public accounting firms (“firms”) to significantly
improve their quality control (“QC”) systems. The Board believes that, as firms prepare
for the effective date of QC 1000, many such improvements have been and will continue
to be implemented as firms develop more rigorous QC systems. The Board’s experience
during the implementation period led us, however, to consider whether the new standard
imposes costs that may not be necessary for us to achieve the Board’s regulatory goals

1

A Firm’s System of Quality Control and Other Amendments to PCAOB Standards, Rules, and
Forms, PCAOB Rel. No. 2024-005 (May 13, 2024) (“QC 1000 2024 adopting release”).

and, relatedly, whether there were certain aspects of QC 1000 that could be brought into
closer alignment with other audit firm quality management standards. 2
The Board adopted amendments to QC 1000 that it believes address concerns
regarding the implementation challenges identified by firms and better align certain
provisions with other quality management standards. These amendments are designed to
reduce compliance costs while maintaining the investor protection benefits of QC 1000.
The principal amendments the Board adopted:
•

Rescind the “design-only” requirement so that QC 1000 imposes requirements
only on firms that are required to comply with applicable professional and
legal requirements with respect to any “engagement” as defined in QC 1000
(QC 1000.06 and .07d);

•

Provide increased flexibility in filling certain specified roles in the QC system
by permitting roles to be assigned to non-firm personnel and divided among
multiple individuals (QC 1000.12);

•

Rescind the requirement to have an External QC Function (“EQCF”)
(QC 1000.28);

•

Narrow and simplify communication requirements relating to metrics that the
firm communicates to external parties about its audit practice, firm personnel,
or engagements (QC 1000.53e);

2

See International Standard on Quality Management (“ISQM”) 1, Quality Management for Firms
that Perform Audits or Reviews of Financial Statements, or Other Assurance or Related Services
Engagements (“ISQM 1”), issued by the International Auditing and Assurance Standards Board;
Statement on Quality Management Standards (“SQMS”) No. 1, A Firm’s System of Quality
Management (“SQMS 1”), issued by the Auditing Standards Board of the American Institute of
CPAs.

•

With respect to identified engagement deficiencies, require evaluation of
whether similar engagement deficiencies exist on other engagements only if
the identified deficiency resulted or could result in (i) a failure to obtain
sufficient appropriate evidence to support the conclusion reached on an
engagement or (ii) an inappropriate overall conclusion on the subject matter of
an engagement (QC 1000.68d);

•

Revise the definition of QC deficiency to make clear that, when firms have
implemented more than one quality response to address the same quality risk,
they can take those other quality responses (e.g., compensating responses) into
account when determining whether a QC deficiency exists (QC 1000.A8);

•

Allow firms to select the date as of which they annually evaluate the
effectiveness of their QC system, rather than requiring firms to evaluate as of
September 30 (QC 1000.77);

•

Revise the QC system evaluation conclusions to align more closely with the
conclusions in other quality management standards, while retaining a
structured process, including specified factors for consideration, to guide the
evaluation (QC 1000.77 and .78); and

•

Simplify the requirements for retention of QC system documentation and
abbreviate the retention period from seven to five years (QC 1000.84 and .86).

Additional amendments the Board adopted, including conforming amendments,
are discussed below.
Several of the amendments the Board adopted bring QC 1000 into closer
alignment with other quality management standards, both internationally and in the

United States. However, differences remain in areas where the Board continues to believe
that alternative or incremental provisions of QC 1000 better address its legal and
regulatory environment, the needs and priorities of the Board’s stakeholders, and the
Board’s statutory mandate of protecting investors and the public interest.
QC 1000 and the related amendments to PCAOB standards, rules, and forms
adopted in 2024 will take effect on December 15, 2026. If approved by the SEC, the
amendments to QC 1000 that the Board adopted and the related amendments to a
PCAOB rule and PCAOB forms will also take effect on December 15, 2026.
The proposed rules also include technical amendments to AS 2101, Audit
Planning, to remove references to an auditing standard that was rescinded by another
rulemaking. 3 The Board adopted these amendments as final due to their technical nature,
and the Board did not seek public comment on these amendments. These amendments
will be effective upon SEC approval.
(b)

Statutory Basis

The statutory basis for the proposed rules is Title I of the Act.
B.

Board’s Statement on Burden on Competition
Not applicable. The Board’s consideration of the economic impacts of the

proposed rules is discussed in section D below.
C.

Board’s Statement on Comments on the Proposed Rule Change Received from
Members, Participants, or Others

3

See General Responsibilities of the Auditor in Conducting an Audit and Amendments to PCAOB
Standards, PCAOB Rel. No. 2024-004 (May 13, 2024) (rescinding AS 1015, Due Professional
Care in the Performance of Work).

The Board released proposed rule amendments for public comment on June 9,
2026, in its release titled Supplemental Request for Comment: Proposed Amendments to
QC 1000, A Firm’s System of Quality Control, and Related Rule and Forms, PCAOB
Release No. 2026-002. The Board received 25 comment letters in response to that
supplemental request for comment. See Comment Letters for Docket 057,
https://pcaobus.org/about/rules-rulemaking/rulemaking-dockets/docket-057/commentletters. The Board also received 26 comment letters in response to a request for public
comment on the PCAOB strategic priorities, identified at footnote 12 below, and 4
comment letters in response to a request for public comment on PCAOB standard setting,
identified at footnote 289 below, and 1 comment letter in response to a request for public
comment on the Draft 2026-2030 Strategic Plan Goals and Objective, identified at
footnote 300 below, which all raised comments specifically to QC 1000, among other
things. See Comment Letters on the PCAOB website available at
https://pcaobus.org/about/strategic-plan-budget/public-comments-on-pcaob-strategicpriorities, https://pcaobus.org/oversight/standards/standard-setting-researchprojects/agenda-consultation--request-for-public-comment-on-pcaob-standard-setting,
and https://pcaobus.org/about/strategic-plan-budget/public-comments-on-goals-andobjectives-for-pcaob-strategic-plan-2026-2030, respectively. The Board has carefully
considered all comments received. The Board’s responses to the comments received,
including revisions to the proposed rule amendments, are discussed below.
BACKGROUND

This section presents background information on this rulemaking, including
recent rulemaking history and staff implementation support efforts since SEC approval of
QC 1000 in September 2024.
RECENT RULEMAKING HISTORY
On May 13, 2024, the Board adopted QC 1000 and related amendments. They
were approved by the SEC on September 9, 2024, with an effective date of December 15,
2025. 4
On August 28, 2025, to provide firms with additional time for implementation,
the Board proposed to delay the effective date of QC 1000 and the related amendments to
December 15, 2026, and that postponement became immediately effective. 5 The SEC
received 15 comment letters in response to its notice regarding the postponement. 6
Commenters generally supported providing additional implementation time but raised
concerns regarding certain provisions of QC 1000 that they viewed as more prescriptive
than other quality management standards and as creating unnecessary operational
complexity and cost.

4

For more details regarding the rulemaking history of QC 1000, see Rulemaking Docket No. 046
on the Board’s website, available at https://pcaobus.org/about/rules-rulemaking/rulemakingdockets/docket-046-quality-control; see also Public Company Accounting Oversight Board; Order
Granting Approval of QC 1000, A Firm’s System of Quality Control and Related Amendments to
PCAOB Standards, Rules, and Forms, SEC Rel. No. 34-100968 (Sept. 9, 2024).

5

See Public Company Accounting Oversight Board; Notice of Filing and Immediate Effectiveness
of Proposed Rule Change Postponing the Effective Date of Amendments to Board Standards,
Rules, and Forms Adopted on May 13, 2024, SEC Rel. No. 34-103803 (Aug. 28, 2025).

6

The comment letters received are available on the SEC’s webpage, available at
https://www.sec.gov/comments/pcaob-2025-01/pcaob202501.htm.

On July 23, 2025, and March 20, 2026, the PCAOB received letters from a firmrelated group regarding implementation of QC 1000 and related implementation
challenges. 7
On March 31, 2026, the Board issued a request for public comment on the
PCAOB’s strategic priorities, including future standard-setting activity. 8 Several
commenters provided observations regarding QC 1000. 9 The comments relating to QC
1000 were generally consistent with themes raised in comment letters submitted to the
PCAOB and SEC in connection with the extension of the effective date of QC 1000.
Most commenters urged the Board to adopt or align more closely with ISQM 1,
suggesting it may better support global implementation, while emphasizing that
differences in structure, terminology, and prescriptive requirements in QC 1000 create
operational challenges, limit firm judgment, and increase complexity for global firms.
After considering feedback and information obtained through implementation
support efforts, 10 on June 9, 2026, the Board issued a supplemental request for comment
on potential targeted amendments to certain provisions of QC 1000 and related

7

See letter from the Center for Audit Quality dated July 23, 2025, available at
https://www.thecaq.org/comment-letter-pcaob-requesting-deferral-qc-1000; and letter from the
Center for Audit Quality dated March 20, 2026, available at https://www.thecaq.org/letter-to-thepcaob-on-qc1000-implementation-experience-and-costs.

8

See Request for Public Comment, PCAOB Strategic Priorities, PCAOB Rel. No. 2026-001 (Mar.
31, 2026).

9

The comment letters received are on the Board’s website, available at
https://pcaobus.org/about/strategic-plan-budget/public-comments-on-pcaob-strategic-priorities.

10

See discussion below regarding PCAOB staff’s implementation support efforts, including
implementation guidance, workshops, stakeholder outreach, and feedback received from firms and
other stakeholders regarding QC 1000 implementation.

amendments to the QC reporting rule and PCAOB forms. 11 The Board received
26 comment letters. 12 Commenters included firms and firm-related groups, investorrelated groups, and others. Firms, firm-related groups, and most other commenters
generally supported the Board’s objective of making targeted amendments to QC 1000
and most of the proposed amendments, particularly those intended to increase flexibility,
improve operability, reduce unnecessary compliance burdens, and better align QC 1000
with other quality management standards. 13 One investor-related group did not support
the proposed amendments overall because of the proposed rescission of the EQCF
requirement. 14 Other investor-related groups generally supported the proposed
amendments that reduce compliance costs without reducing audit quality, but opposed the
removal of the EQCF requirement, emphasizing the importance of independent oversight

11

See Supplemental Request for Comment: Proposed Amendments to QC 1000, A Firm’s System of
Quality Control, and Related Rule and Forms, PCAOB Rel. No. 2026-002 (June 9, 2026)
(proposing amendments to QC 1000, PCAOB Rule 2203A, and PCAOB Forms 1, 2, and QC).

12

See comment letters on the Supplemental Request for Comment from the Auditing Standards
Committee, Auditing Section - American Accounting Association (July 3, 2026) (“AAA”); Baker
Tilly US, LLP (July 9, 2026) (“Baker Tilly”); BDO USA, P.C. (July 9, 2026) (“BDO”); CBIZ
CPAs P.C. (July 9, 2026) (“CBIZ”); Center for Audit Quality (July 9, 2026) (“CAQ”); CFA
Institute (Aug. 31, 2026) (“CFA”); Council of Institutional Investors (July 9, 2026) (“CII”);
Crowe LLP (July 9, 2026) (“Crowe”); Deloitte & Touche LLP (July 9, 2026) (“Deloitte”); Ernst &
Young LLP (July 9, 2026) (“EY”); Forvis Mazars, LLP (July 9, 2026) (“Forvis”); George R.
Kramer (July 6, 2026) (“Kramer”); Grant Thornton LLP (July 9, 2026) (“GT”); International
Corporate Governance Network (July 9, 2026) (“ICGN”); James Grosvenor (July 9, 2026)
(“Grosvenor”); KPMG LLP (July 9, 2026) (“KPMG”); MaloneBailey, LLP (June 26, 2026)
(“Malone Bailey”); Members of the Investor Advisory Group (July 9, 2026) (“MIAG”);
Pennsylvania Institute of CPAs (July 9, 2026) (“PICPA”); Plante & Moran, PLLC (July 10, 2026)
(“Plante & Moran”); PricewaterhouseCoopers LLP (July 9, 2026) (“PwC”); RSM US LLP (July 9,
2026) (“RSM”); St. Charles Consulting Group (June 12, 2026) (“SCCG”); Thomas H. Spitters
(July 6, 2026) (“Spitters”); and Virginia Society of CPAs (July 9, 2026) (“VSCPA”). One
additional comment letter was withdrawn.

13

See, e.g., comment letters from AAA, Baker Tilly, BDO, CAQ, CBIZ, Crowe, Deloitte, EY,
Forvis, Grosvenor, GT, KPMG, Kramer, Malone Bailey, PICPA, Plante & Moran, PwC, RSM,
SCCG, Spitters, and VSCPA.

14

See comment letter from CII.

and investor protection, and other amendments they viewed as weakening investorprotection-focused provisions of QC 1000. 15 Many commenters, particularly firms and
firm-related groups, also requested implementation guidance and clarification in certain
areas discussed below. 16
The Board considered all comments received on the supplemental request for
comment. As discussed below, the Board is adopting the proposed amendments to QC
1000, with certain modifications.
IMPLEMENTATION SUPPORT EFFORTS
Since SEC approval of QC 1000, PCAOB staff have supported implementation
through guidance, workshops, outreach activities, and engagement with stakeholders,
which provided insight into implementation progress, challenges, and questions and
informed the Board’s consideration of the proposed amendments. 17 Additionally, as part
of inspection outreach activities, the Board obtained feedback on the progress made by
firms in implementing QC 1000 in their QC systems. 18

15

See comment letters from CFA, ICGN, and MIAG.

16

See, e.g., comment letters from Baker Tilly, BDO, CAQ, CBIZ, Crowe, Deloitte, EY, Forvis, GT,
KPMG, Kramer, Plante & Moran, RSM, SCCG, and VSCPA.

17

See PCAOB, Quality Control—Implementation Resources, available at
https://pcaobus.org/oversight/standards/implementation-resources-PCAOB-standardsrules/quality-control, which includes staff guidance and other materials issued to support
implementation of QC 1000 and the related amendments.

18

See section titled “Need” under “Economic Considerations” below for additional information on
data received through these inspection outreach activities.

As part of staff implementation support efforts, the PCAOB staff released QC
1000 Questions and Answers (“QC 1000 Q&As”) in August 2026. 19 The QC 1000 Q&As
provide technical guidance on various aspects of QC 1000, including roles and
responsibilities, evaluation and reporting, documentation, and other areas of designing,
implementing, operating, and evaluating a firm’s QC system. The QC 1000 Q&As were
developed in response to questions and requests for clarification received from firms
through staff implementation support efforts and are intended to reduce uncertainty and
support firms’ implementation of the standard.
The QC 1000 Q&As do not address the specific topics that are the subject of the
amendments to QC 1000 that the Board adopted, but they do address some questions and
clarification requests on other topics that were included in comment letters submitted in
response to the supplemental request for comment. As implementation continues,
additional guidance, including updates to the QC 1000 Q&As, may be issued to help
address other areas identified by commenters or through staff implementation support
efforts.
AMENDMENTS TO QC 1000, PCAOB RULE 2203A, AND PCAOB FORM QC
This section describes the requirements of QC 1000, Rule 2203A, and Form QC
that the Board amended.
REQUIREMENT TO DESIGN, IMPLEMENT, AND OPERATE A QC
SYSTEM

19

See QC 1000 Questions and Answers, available at
https://pcaobus.org/oversight/standards/standard-setting-research-projects/quality-control/qc1000-questions-and-answers.

As originally adopted, QC 1000.06 requires all firms to design a QC system that
complies with the standard, regardless of whether the firm is subject to applicable
professional and legal requirements with respect to an engagement as defined in QC
1000. As explained in the supplemental request for comment, the Board understands that
this “design-only” requirement would impose costs on firms that do not perform
engagements requiring registration under the Sarbanes-Oxley Act of 2002 (“SarbanesOxley”) 20 or PCAOB rules 21 without commensurate benefits for investors and the public.
Therefore, the Board proposed to eliminate the requirement and sought comment on
potential alternatives, as well as any circumstances that potentially could trigger a design
requirement. As proposed in the supplemental request for comment, paragraphs .05
through .07 of QC 1000 would be revised to eliminate the separate obligation to design a
QC system and would maintain unchanged the obligation to design, implement, and
operate a QC system in compliance with QC 1000 when a firm is subject to applicable
professional and legal requirements with respect to any of the firm’s engagements.
Many commenters supported the proposal to rescind the design-only
requirement. 22 One commenter stated that they did not object to rescinding the designonly requirement when a firm neither performs nor intends to perform PCAOB

20

See section 102(a) of Sarbanes-Oxley, 15 U.S.C. 7212(a).

21

See PCAOB Rule 2100, Registration Requirements for Public Accounting Firms.

22

See comment letters from AAA, Baker Tilly, BDO, CAQ, Crowe, Deloitte, GT, KPMG, Kramer,
MIAG, PICPA, PwC, and RSM. But see comment letters from ICGN and Spitters. One
commenter expressed support for eliminating the “design-only reporting requirement,” described
as the “requirement for firms to report once a quality control system has merely been designed.”
See comment letter from VSCPA.

engagements. 23 One of the commenters supporting rescission stated that it did not believe
registered firms should be required to comply with PCAOB standards until the firm
undertakes an engagement requiring compliance with those standards and that the designonly requirement was inconsistent with the text of Sarbanes-Oxley. 24 Commenters that
addressed the question of whether the Board should adopt an alternative design-only
requirement generally did not support such a requirement. 25
However, one commenter stated support for a QC design requirement that
included effective operation of a system of quality management under relevant standards
for the jurisdiction in which the firm operates, such as ISQM 1 or SQMS 1. 26 This
commenter noted that, in practice, registered firms would already maintain some form of
a system of quality management to support their PCAOB registration. 27 The Board does
not believe QC 1000 should explicitly require compliance with rules of local
jurisdictions, as PCAOB standards generally do not impose such requirements. Another
commenter noted that, although some registered firms do not conduct audits, that fact
does not necessarily signify the need for an exemption from standard best practices or
audit quality requirements; such firms should be subject to QC 1000 on the level of
preparedness or some QC regime that parallels QC 1000 in its design, implementation,

23

See comment letter from CFA.

24

See comment letter from RSM.

25

See comment letters from AAA, BDO, GT, KPMG, Kramer, and PICPA.

26

See comment letter from RSM.

27

See id.

and operation. 28 The Board does not believe that the suggestion to base a design-only
requirement on a level of preparedness or a system paralleling QC 1000 is workable
because it is too vague as to the requirements that would apply to firms not performing
PCAOB engagements.
Commenters raised concerns over the costs of the design-only requirement in
relation to the benefits. 29 One commenter stated that the requirement would have resulted
in unnecessary costs of compliance without commensurate benefits. 30 Another
commenter similarly stated that requiring firms not performing PCAOB engagements to
comply with the design-only requirement did not provide a commensurate benefit to
investor protection, as such firms do not present risk to U.S. capital markets. 31 Another
commenter stated that requiring firms to build compliance infrastructure for work they
may never undertake imposes cost without a corresponding investor benefit. 32 Another
commenter observed that, because firms performing engagements would be fully subject
to the requirement to design, implement, and operate a QC 1000-compliant system,
rescinding the requirement for firms not performing such work would preserve the
Board’s objective of promoting high-quality audits, while reducing unnecessary burdens
for those firms. 33 Another commenter stated that, while the value to the public of the

28

See comment letter from Spitters.

29

See, e.g., comment letters from KPMG, PICPA, and PwC.

30

See comment letter from PwC.

31

See comment letter from KPMG.

32

See comment letter from CFA.

33

See comment letter from GT.

design-only requirement was unclear, the costs would be real in the form of training
costs, consulting costs, and professional time. 34 Other commenters noted the limited
benefits of the requirement for investors, stating that rescission would not diminish
investor protection 35 or introduce any risk to investors, 36 or that retaining the requirement
would not help ensure improved audit quality. 37
Two commenters also raised concerns about requiring firms to address
hypothetical situations. One of these commenters stated that it would be difficult for a
firm not subject to applicable professional and legal requirements with respect to any
engagement to design a QC system based on hypothetical circumstances. 38 The second
commenter stated that such a firm’s QC system “would be hypothetical at best and would
likely become obsolete over time as practice conditions change, leading to the false
pretense that [the firm is] in a position to immediately implement these standards.” 39
The Board is rescinding the design-only requirement and adopting paragraphs .05
through .07 as proposed. 40 The Board believes rescinding the design-only requirement
will reduce costs for firms without any significant detriment to audit quality.

34

See comment letter from PICPA.

35

See comment letter from GT.

36

See comment letter from Baker Tilly.

37

See comment letter from PICPA.

38

See comment letter from AAA.

39

See comment letter from PICPA.

40

As noted in the supplemental request for comment, the Board does not believe that this action
would violate the mandate in section 103(a)(2)(B) of Sarbanes-Oxley, 15 U.S.C. 7213(a)(2)(B), to
adopt requirements “for every registered public accounting firm” that address certain enumerated
areas in “the quality control standards that [the PCAOB] adopts with respect to the issuance of
audit reports.” Under the Board’s approach, QC 1000 will apply to every firm with respect to the

As confirmed by commenter feedback, implementing the design-only requirement
has proven more difficult and costly than originally anticipated. The requirement may
compel some firms that have no intention of performing PCAOB engagements in the
foreseeable future to design a QC 1000-compliant system, perhaps based on hypothetical
circumstances. As described in the supplemental request for comment, the Board believes
that the design-only requirement may have contributed to an increase in withdrawals
from registration by firms that are not performing engagements. Although the impact of
such activity on the marketplace (discussed below in the economic analysis) may be
limited, the Board believes investors and the public interest are better served by
incentivizing firms to register and consider seeking PCAOB engagements, thereby
promoting competition. 41
In the Board’s view, rescission of the design-only requirement would entail
foregoing the benefits associated with greater preparedness of firms to take on a PCAOB
engagement for the first time. The Board believes this benefit to be modest, as any firm
that actually takes on such an engagement will have become subject to the requirement to
design, implement, and operate a QC 1000 system. 42 In any event, and as noted by one

issuance of “audit reports” (which are limited under Sarbanes-Oxley to those relating to audits of
issuers and broker-dealers).
41

As noted in the supplemental request for comment, some firms may register with the Board to
perform activities not subject to the PCAOB’s jurisdiction. See, e.g., Guiding and Establishing
National Innovation for U.S. Stablecoins Act, Pub. L. No. 119-27 (July 18, 2025), section
4(a)(3)(A), 12 U.S.C. 5903(a)(3)(A) (requiring month-end reports of permitted payment stablecoin
issuers to be examined by a PCAOB-registered firm).

42

Firms could still choose to design (and for that matter, implement and operate) a QC system that
complies with QC 1000. Firms may choose to do so if, for example, they are planning to bid for a
PCAOB engagement, are taking on work on other firms’ engagements that could potentially
constitute a substantial role, or otherwise want to put themselves in a position to implement and
operate a QC 1000-compliant system on short notice.

commenter, registered firms that do not perform PCAOB engagements are generally
well-positioned to implement QC 1000 if or when required to do so. 43 This is so because
most such firms, as some commenters observed, are generally either non-U.S. firms
subject to international auditing standards or U.S.-based firms that conduct private
company audits under the standards of the Auditing Standards Board of the American
Institute of CPAs (“AICPA”); as such, those firms would be subject to ISQM 1 or
SQMS 1, which both share a common basic structure with QC 1000. 44 Finally, as stated
in the supplemental request for comment, the investor protection concerns encompassed
by the Board’s statutory mandate are reduced where a firm is not performing PCAOB
engagements.
Based on the above considerations, the Board decided not to adopt any of the
design-only alternatives discussed in the supplemental request for comment.
The Board also considered whether to include provisions in QC 1000 specifying
an earlier trigger for the requirement to design, implement, and operate a QC 1000compliant system under QC 1000.06-.07. In this regard, one commenter encouraged the
Board to consider whether compliance with QC 1000 after its December 15, 2026
effective date could be tied to an established evaluation period and measurement date
rather than a specific triggering event. 45 The same commenter suggested that under such
an approach, a firm would determine at the beginning of its selected evaluation cycle

43

See comment letter from KPMG.

44

See comment letters from AAA, CAQ, KPMG, and PwC.

45

See comment letter from BDO.

whether it is required to comply with QC 1000 during that period. 46 Another commenter
stated that a firm must have “an appropriately designed and operational QC system
before accepting or commencing PCAOB audit work.” 47 Another commenter suggested
that “a QC system must be in place prior to a firm tendering an offer for a public
company audit and/or getting registered.” 48 Another commenter requested that the Board
specify an earlier trigger—for example, when a firm bids for or is appointed to issuer or
broker-dealer work—by which time a compliant QC system must be designed and
operating, well in advance of the firm commencing that work. 49
While an earlier trigger may promote readiness by firms to commence PCAOB
engagements, the Board expects that the effort required to design, implement, and operate
a QC 1000-compliant system may vary significantly across firms. That variation could
arise from several different factors, including the status of their existing QC systems, the
nature of their assurance practice (if any), the experience of their personnel, and the
nature of their governance systems, operating processes, and technology, among other
things. The Board also understands that some firms may pursue engagements for issuers
and broker-dealers months, or even years, before these firms are awarded and commence
such work. In light of these considerations, it may not be necessary in all circumstances
for a firm to have a QC system that fully complies with QC 1000 before it pursues an
issuer or broker-dealer engagement that might not be awarded to it or that might not

46

See id.

47

See comment letter from MIAG.

48

See comment letter from ICGN.

49

See comment letter from CFA.

commence for a significant period of time. Therefore, the Board believes that requiring
firms to design, implement, and operate a QC 1000-compliant system when a firm
becomes subject to applicable professional and legal requirements with respect to any
engagement is appropriate, and an earlier trigger is not warranted.
ROLES AND RESPONSIBILITIES
1. ASSIGNMENT OF ROLES AND RESPONSIBILITIES
As originally adopted, QC 1000 requires that the operational roles and
responsibilities specified in paragraph .12 be assigned only to “firm personnel.” 50 The
note to paragraph .12 provides that responsibility for the roles in subparagraphs a-c
cannot be shared and is required to be assigned to only one individual, to reinforce that
the individual assigned to a specified role would be responsible and accountable for the
role.
The Board proposed amendments to paragraph .12 to allow flexibility in assigning
the specified roles and responsibilities to any individual (whether firm personnel or an
“other participant” 51), rather than limiting those roles and responsibilities to firm
personnel. In connection with that change, the Board proposed a new footnote 5A to
paragraph .12 to clarify that such individuals would be “associated persons” of the firm.
As the Board explained in the supplemental request for comment, any individual who
was not already an associated person would become an associated person by virtue of that

50

See QC 1000.A5.

51

See QC 1000.A7.

assignment. 52 The proposed amendments would align with ISQM 1 and SQMS 1 by
permitting any qualified individual to fill the specified QC system roles.
To preserve the accountability and responsibility objectives of paragraph .12, the
Board also proposed an amendment to emphasize that the individuals assigned specific
roles understand and be accountable for their roles and responsibilities. The Board also
proposed an amendment to the note to paragraph .12 to allow firms to divide the
responsibilities of a role specified in paragraph .12 among multiple individuals. The
proposed amendments align with ISQM 1 and SQMS 1.
Commenters generally supported allowing the specified roles to be assigned to
other participants and divided among multiple individuals. 53 Many commenters indicated
the amendments would promote audit quality, for example, by enabling the firm to place
the most experienced and qualified individuals in those roles. 54 Several commenters also
supported allowing firms the flexibility to assign roles and responsibilities to multiple
individuals based on their specialized expertise and capacity, including within their
existing structures, while maintaining accountability. 55 Several commenters stated that
the proposed amendments to paragraph .12 were sufficiently clear and appropriate. 56

52

See PCAOB Rule 1001(p)(i).

53

See comment letters from AAA, Baker Tilly, BDO, CAQ, CBIZ, Crowe, Deloitte, EY, Forvis,
GT, ICGN, KPMG, Kramer, MIAG, PICPA, PwC, RSM, SCCG, and Spitters.

54

See comment letters from CAQ, Deloitte, GT, KPMG, MIAG, PICPA, RSM, SCCG, and Spitters.

55

See comment letters from AAA, Baker Tilly, CAQ, CFA, EY, GT, KPMG, and SCCG.

56

See comment letters from GT, KPMG, MIAG, RSM, and Spitters.

A commenter stated that the proposed amendments would be especially helpful to
firms that issued audit reports with respect to less than 100 issuers. 57 Another commenter
supported the addition of footnote 5A, which clarifies that an individual assigned
operational responsibility for any of the roles in paragraph .12 would become an
associated person of the firm by virtue of that assignment. 58 One commenter
recommended retaining clear firm-level accountability and documentation requirements
to avoid diffusion of responsibility. 59 Another commenter recommended the final
standard require clear identification of those ultimately responsible for the QC system
and key QC areas; this commenter further suggested that the PCAOB encourage firms to
consider the firms’ retirees for QC system roles, as such individuals would provide
valuable experience. 60
One commenter did not support assigning roles to individuals outside the firm
because individuals outside the firm may have conflicting interests, and they cannot
provide the day-to-day ownership the roles require. 61 The same commenter stated that
there remains a need for an ultimate point of accountability and there needs to be
assurance that accountability is not diffused when responsibilities are divided. 62 Further,
the commenter requested that whenever a QC role is divided among multiple individuals,

57

See comment letter from Kramer.

58

See comment letter from PICPA.

59

See comment letter from SCCG.

60

See comment letter from MIAG.

61

See comment letter from CFA.

62

See id.

the firm’s reporting to the PCAOB identify (1) who holds ultimate responsibility and
accountability for the QC system as a whole; (2) who is accountable for each function,
such as ethics, independence, monitoring, and remediation; and (3) the scope of each
individual’s assigned responsibilities, so that no part of any role is left unassigned. 63
As to the question of whether the flexibility afforded by the proposed
amendments should be available only on a scaled basis to certain firms, many
commenters generally favored applying the amendments to all firms. 64 Several of these
commenters emphasized that the flexibility the proposed amendments would offer is
important for firms of all sizes, although for reasons that may differ between larger and
smaller firms. 65 One commenter said such flexibility appears appropriate regardless of
firm size, while noting that larger firms may be better equipped to operate under a more
restrictive and specialized set of requirements. 66 Another commenter stated they would
not be opposed to a limited degree of scaling these requirements to address cost
considerations for small and large firms. 67
After consideration of the comments received, the Board is adopting these
amendments as proposed. The Board believes the flexibility afforded by the amendments
should be available to all firms rather than on a scaled basis, because audit quality is
enhanced when firms can assign the specified roles and responsibilities to the most

63

See id.

64

See comment letters from AAA, BDO, CAQ, CBIZ, GT, KPMG, PICPA, PwC, RSM, and
Spitters.

65

See comment letters from AAA, BDO, CAQ, CBIZ, GT, KPMG, PwC, and RSM.

66

See comment letter from Kramer.

67

See comment letter from ICGN.

qualified individuals, whether or not they are firm personnel. In the Board’s view, the
amendments will expand the pool of individuals with the requisite experience,
competence, authority, and time to serve in specified roles. For example, a firm may
improve its QC system and overall audit quality by assigning to one individual
operational responsibility for ethics and to another individual operational responsibility
for independence, where each individual has specific expertise in their respective area.
In response to commenters that recommended clear firm-level accountability and
documentation when roles are divided, paragraph .27 requires a firm to establish and
maintain clear lines of responsibility and supervision within the QC system, including
defining authorities, responsibilities, accountabilities, and supervisory and reporting lines
for roles within the firm up to and including the principal executive officer(s).
Additionally, paragraph .82a requires the firm to document the lines of responsibility and
supervision required by paragraph .27. In response to a commenter’s call for specific
reporting to the PCAOB about divided roles, the Board notes that Item 3.1 of Form QC
requires firms to disclose (1) who holds ultimate responsibility and accountability for the
QC system as a whole and (2) which individual or individuals have operational
responsibility for ethics and independence and for monitoring and remediation. Although
the specific scope of each individual’s assigned responsibilities would not be reported,
that information must be documented under paragraph .82a and would be available to the
PCAOB in connection with its oversight activities, including inspections. 68
2. RESPONSIBILITIES FOR ROLES WITH OPERATIONAL
RESPONSIBILITY
68

See PCAOB Rule 4000(b), General.

To align with the amendments to QC 1000.12, the Board proposed conforming
amendments to paragraphs .15-.17 that would acknowledge the possibility that multiple
individuals could share the specified roles and clarify that such individuals’ obligations
would be limited to the scope of their assigned responsibilities.
In addition, the Board proposed amendments to paragraph .17b(2) through (3) to
delete the communication requirements related to major QC deficiencies to align with the
amendments to the evaluation requirement in paragraph .77 discussed below.
Commenters who addressed these amendments supported the proposed changes to
paragraphs .15-.17 and stated they are sufficiently clear. 69 Two commenters
acknowledged that the conforming amendments are appropriately aligned with the
revisions to paragraph .12. 70 One commenter stated the conforming amendments
reinforce a more principles-based approach 71 and another commenter stated the
conforming amendments increase flexibility. 72 After consideration of the comments
received, the Board is adopting these conforming amendments as proposed.
EXTERNAL QC FUNCTION
As originally adopted, paragraph .28 of QC 1000 includes a specified quality
response that requires firms with a larger PCAOB audit practice 73 to incorporate into

69

See comment letters from CAQ, GT, KPMG, PICPA, RSM, and Spitters.

70

See comment letters from GT and RSM.

71

See comment letter from GT.

72

See comment letter from KPMG.

73

Firms with a larger PCAOB audit practice are considered those firms that issued audit reports for
more than 100 issuers in the prior calendar year.

their governance structure an EQCF for the QC system composed of one or more persons
who:
•

Are not partners, shareholders, members, other principals, or employees of the
firm;

•

Do not otherwise have a commercial, familial, or other relationship with the
firm that would interfere with the exercise of independent judgment with
regard to matters related to the QC system; and

•

Have the experience, competence, authority, and time necessary to enable
them to carry out the responsibilities assigned to the EQCF by the firm.

The EQCF’s responsibilities include, at a minimum, evaluating the significant
judgments made and the related conclusions reached by the firm when evaluating and
reporting on the effectiveness of its QC system.
The Board proposed rescinding the EQCF requirement based on information
obtained in connection with staff implementation support efforts and outreach
discussions, which revealed that implementing this requirement had proven more difficult
and more costly than originally anticipated. The Board was concerned that the potential
benefits may not justify the potential costs of the EQCF requirement, except potentially
for the largest U.S. global network firms.
Many commenters expressed support for rescinding the EQCF requirement. 74
Some of these commenters said rescission would allow firms the flexibility to utilize
existing external governance structures to promote audit quality in a manner tailored to

74

See comment letters from AAA (majority of AAA committee members), Baker Tilly, BDO, CAQ,
CBIZ, Crowe, Deloitte, EY, Forvis, GT, KPMG, PICPA, Plante & Moran, PwC, RSM, and
VSCPA.

their specific circumstances. 75 Some commenters stated that removing the EQCF
requirement would not diminish the focus on quality because QC 1000 advances the
objectives of strengthening trust in governance, reinforcing accountability, and
supporting a commitment to quality through other provisions in the standard. 76 Other
commenters offered support for the proposed rescission by asserting that existing
governance structures, leadership accountability, monitoring activities, reporting
processes, and PCAOB inspections already provide meaningful oversight or help
promote the effective operation of the QC system. 77
In addition, many commenters observed that the costs associated with the EQCF
requirement, as well as any incremental benefits to audit quality, remain uncertain. 78
Some commenters who supported removing the requirement cited significant
implementation challenges and costs associated with identifying, recruiting, and
onboarding individuals with the necessary expertise, independence, and availability to
serve in the role. 79 Other commenters pointed to additional costs, including obtaining
liability insurance and making governance-related structural changes, as further reasons
to support the proposed rescission. 80 One commenter cautioned that rescission of the
EQCF requirement would remove a level of assurance with respect to internal processes

75

See comment letters from BDO, CBIZ, Deloitte, EY, GT, KPMG, Plante & Moran, PwC, RSM,
and VSCPA.

76

See comment letters from BDO, CBIZ, Crowe, KPMG, and PwC.

77

See comment letters from CAQ, EY, PICPA, and VSCPA.

78

See comment letters from CAQ, Deloitte, GT, KPMG, PICPA, Plante & Moran, and RSM.

79

See comment letters from BDO, CAQ, Crowe, EY, GT, PICPA, and VSCPA.

80

See comment letters from BDO, Deloitte, KPMG, PICPA, and RSM.

and audit quality in firms but described the requirement as expensive, redundant,
overreaching, and unnecessary. 81 Two commenters acknowledged the narrow
responsibilities of an individual serving in an EQCF role, but asserted that the Board may
have overstated the potential costs of the EQCF requirement by using particular
benchmarks involving compensation of non-employee company directors to estimate
potential costs. 82 These commenters also suggested that the Board may have understated
the potential benefits of the EQCF requirement by failing to consider the ongoing trend of
private equity investing in accounting firms. 83 Another commenter stated that many of
the firms most likely to be affected already use external advisers and that the incremental
burden of establishing the mandated function may be less substantial than the proposal
implies. 84 This commenter also stated that the Board did not have direct evidence on the
cost of the EQCF to firms. 85
One commenter raised concerns that the size and complexity of a large firm’s QC
system would create practical constraints on the depth of engagement individuals serving
in the EQCF role can achieve, thereby limiting the EQCF’s overall effectiveness and
value beyond the oversight already available through existing channels. 86 Another

81

See comment letter from Spitters.

82

See comment letters from CII and MIAG.

83

See id.

84

See comment letter from CFA.

85

See id.

86

See comment letter from Deloitte.

commenter supported rescission of the EQCF requirement because its current form is not
scalable for firms only moderately above the 100-issuer threshold. 87
Some commenters opposed the proposed rescission of the EQCF requirement. 88
Two commenters disagreed with the PCAOB’s reasoning “that the benefits of the
requirement may not justify the costs, except potentially for the largest U.S. global
network firms.” 89 The same commenters, while acknowledging concerns related to
potential costs, liability, and implementation, stated that some form of independent
challenge remains a critical component of an effective QC system. 90 Another commenter
viewed the EQCF as essential to audit quality. 91 One commenter expressed concern that
rescinding the EQCF requirement would leave judgments about the firms’ QC systems
entirely to the firms themselves. 92 This commenter stated the EQCF is the clearest
structural safeguard against the commercial and network pressures and interests that can
affect a firm’s judgments regarding its QC system. 93 This commenter further asserted
that, as the PCAOB moves the focus of its audit inspections to the firm rather than the
engagement level, and as private-equity ownership and other commercial pressures

87

See comment letter from Baker Tilly.

88

See comment letters from AAA (minority of AAA committee members), CFA, CII, ICGN, and
MIAG.

89

See comment letters from CII and MIAG.

90

See id.

91

See comment letter from ICGN.

92

See comment letter from CFA.

93

See id.

within the auditing profession continue to grow, retaining such a safeguard is particularly
important. 94
Two commenters also asserted that the requirement for larger PCAOB audit
practices to have an EQCF would be applicable to only five firms. 95 However, absent
rescission of the EQCF requirement, 13 firms, based on 2025 data, would become subject
to that requirement. 96
In responding to the question regarding an alternative threshold for the EQCF
requirement, many commenters stated it was not necessary to impose the EQCF
requirement on any firm, regardless of size or number of issuers audited. 97 Some
commenters did not support an alternative threshold (e.g., restricting the requirement only
to firms auditing more than 500 issuers) because retaining the requirement in any form
would not resolve the underlying concerns about operability, costs, availability of
qualified individuals, and uncertain incremental benefit. 98 Some commenters said that
firms should have the flexibility to create governance structures that align with the nature
and extent of their existing structure and risks of the firm. 99
One commenter stated that if the Board concludes that some relief is necessary, it
is better to retain the EQCF requirement as adopted for firms auditing more than 500

94

See id.

95

See comment letters from CII and MIAG.

96

See footnote 401 for a list of the 13 firms.

97

See comment letters from Baker Tilly, BDO, Crowe, GT, PICPA, PwC, and RSM.

98

See comment letters from BDO, CAQ, GT, KPMG, PICPA, and RSM.

99

See comment letters from BDO, CAQ, Crowe, and KPMG.

issuers because it would apply to the five firms where nearly all U.S. public market
capitalization sits. 100 One commenter stated that if the current 100-issuer threshold were
not retained, they would not oppose amending the threshold to firms that issued audit
reports for more than 200 issuers during the prior calendar year, because they believe that
the large revenue base received from those firms’ issuer audit clients could support the
incremental costs associated with the EQCF requirement. 101 One commenter suggested
retaining the EQCF requirement for firms that have accepted any form of outside
investment, other than traditional debt financing, and operate through an alternative
practice structure. 102 In addition, one commenter who opposed removing the EQCF
requirement expressed the view that smaller firms (under 100 audits per year) should not
be exempted from robust and functioning alternative EQCF requirements if the PCAOB
were to scale the provisions. 103 Another commenter noted that, given the unchanged
effective date of QC 1000, adopting alternative oversight frameworks could present
implementation challenges and leave firms with limited time to thoughtfully design and
integrate new requirements into their governance structures. 104
In the supplemental request for comment, the Board sought input on the
alternative of reverting the requirement for an independent oversight function to that
contained in the 2022 proposal. Several commenters did not support such an

100

See comment letter from CFA.

101

See comment letter from MIAG.

102

See comment letter from AAA.

103

See comment letter from ICGN.

104

See comment letter from KPMG.

alternative. 105 One commenter stated that the 2022 proposed requirement lacked
sufficient clarity and could create uncertainty regarding whether existing firm governance
and oversight arrangements would satisfy such a requirement. 106 Another commenter
indicated that the effect or impact of adopting the requirement as initially proposed in
2022 could not be determined. 107 One commenter did not support reverting back to the
2022 proposed requirement because it carried no defined duty to evaluate the firm’s QC
conclusions—the very check the EQCF was adopted to provide. 108
After consideration of the comments received, the Board is rescinding the EQCF
requirement. Based on staff implementation support efforts, the Board understands that
implementation of this requirement may have proven more difficult and costly than
originally anticipated. The Board also acknowledges the concerns raised by commenters
about the costs, operability, and potential limited benefit of the EQCF requirement,
including the availability of qualified individuals to serve in an EQCF role, for firms of
any size. In the Board’s view, rescinding the EQCF requirement means giving up the
benefits of an external second look. That external second look would have focused on the
significant judgments made and related conclusions reached when evaluating and
reporting on the effectiveness of firms’ QC systems. The Board believes those
incremental benefits are difficult to quantify and potentially limited. They would come
from the fresh perspectives of an individual serving in an EQCF role, beyond the benefits

105

See comment letters from CAQ, CFA, GT, KPMG, PICPA, PwC, and RSM.

106

See comment letter from KPMG.

107

See comment letter from Spitters.

108

See comment letter from CFA.

already provided by other aspects of QC 1000. See below for further discussion on
economic impacts.
The Board believes that the implementation concerns apply equally to all firms,
including those operating under alternative practice structures or accepting private equity
investments, regardless of the number of issuers they audit.
One commenter opposed the rescission, asserting that firm leadership should be
held accountable through independent oversight. 109 Further, the commenter suggested
that firms might lack the ability to “convince investors they can do the right thing when
left to their own judgment.” 110 As designed, though, the EQCF lacks a mechanism or the
authority to hold firm leadership accountable; the EQCF is not required to provide
concurring approval of the firm’s evaluation or reporting. 111 Nor would the EQCF
supplant the firm’s judgment.
Furthermore, the Board notes that the QC 1000 quality objectives for the
governance and leadership component continue to call for (i) firm leadership to
communicate and promote the firm’s commitment to quality; (ii) the firm to clearly
define leadership’s responsibility for quality and hold them accountable; (iii) firm
leadership to demonstrate a commitment to quality through actions and behaviors;
(iv) the firm’s strategic decisions and actions to be consistent with and support the firm’s
commitment to quality; and (v) resources to be obtained, developed, allocated, and
assigned in a manner that enables an effective QC system and the performance of

109

See id.

110

See id.

111

See PCAOB Rel. No. 2024-005, at 121.

engagements in accordance with applicable professional and legal requirements. 112 To
achieve these quality objectives, firms are required to design and implement quality
responses that are based on the related quality risks and on the reasons for the
assessments given to the quality risks and to reduce to an appropriately low level the risk
that quality objectives will not be achieved. The Board has also observed that several
firms already incorporate external advisors into their organizational and governance
structures and they may continue to do so as part of their response to the quality risks
associated with these quality objectives. The Board has long considered firm governance
and leadership to be an important aspect of firms’ QC systems that will continue to be
subject to oversight by the PCAOB, including as part of PCAOB inspections.
INFORMATION AND COMMUNICATION
QC 1000 requires a firm to establish a quality objective that, if the firm
communicates firm-level or engagement-level information with respect to the firm’s audit
practice, firm personnel, or engagements, such as firm or engagement metrics, to external
parties, such information is accurate and not misleading and, with respect to any such
metrics that are communicated in writing, the communication explains in reasonable
detail how the metrics were determined and, if applicable, how the method of
determining them changed since the metrics were last communicated.
As discussed in the QC 1000 2024 adopting release, the information that this
requirement applies to includes public communications about firm-level or engagementlevel information, such as firm metrics and financial data. 113 For example, some firms

112

See QC 1000.25.

113

See PCAOB Rel. No. 2024-005, at 186.

publish transparency or audit quality reports, either voluntarily or in response to the
requirements of other jurisdictions, that contain data such as:
•

Revenue breakdown by service line, by year, or by geographic segment;

•

Professional staff ratios;

•

Staff turnover ratios;

•

Average training hours per professional; and

•

Partner workload.

Firms may also communicate such data via webpages or other media, such as
promotional publications, social media, interviews, or presentations via webcast or
video. 114
In the supplemental request for comment, the Board proposed to narrow the
requirements of QC 1000.53e regarding the need for an explanation of written metrics to
those metrics that the firm makes publicly available. This was consistent with the initial
focus of the requirement on public communications. 115 The Board believes that recipients
of nonpublic communications regarding metrics, such as regulators, company
management, and audit committees, are generally in a position to request additional
information about the metrics if they desire it. Further, some nonpublic metrics may
already be calculated in accordance with a method prescribed by the recipient (for
example, in response to a regulatory requirement or an audit committee request for
proposal). In contrast, where metrics are publicly available, such as in firm transparency
reports or promotional publications, these are usually one-way communications in which

114

See PCAOB Rel. No. 2024-005, at 186-187.

115

See id.

the external parties do not have the ability to ask questions or request clarification from
the firm.
Several commenters supported the proposed amendments to paragraph .53e. 116
One commenter said they did not object to confining the explanation requirement to
metrics the firm makes publicly available. 117 One of these commenters stated that the
proposed amendments were generally clear and seem appropriate but suggested that the
term “metric” be defined or explained in the rule text. 118 Another commenter stated that
the PCAOB must clearly communicate to firms that the intent of the provision is that
firms ensure that the explanation remains accurate and publicly available. 119 Another
commenter encouraged the Board to make explicit that simplification of communication
requirements does not alter the firm’s monitoring obligations. 120 One commenter stated
that it would be helpful to further clarify whether the requirement applies only to those
communications required under applicable professional and legal requirements or to all
such metrics publicly disclosed. 121 The commenter further requested clarification of
whether all changes to the calculation of disclosed metrics to which this requirement

116

See comment letters from AAA, BDO, CAQ, Deloitte, EY, GT, KPMG, Kramer, MIAG, PICPA,
RSM, SCCG, and Spitters.

117

See comment letter from CFA.

118

See comment letter from Kramer.

119

See comment letter from MIAG.

120

See comment letter from SCCG.

121

See comment letter from RSM.

applies must be explained or whether this requirement applies only to material changes in
the calculation of the disclosed metrics. 122
One commenter stated that the operability of the requirement could be further
enhanced by restructuring the requirement into two distinct quality objectives—one that
addresses whether the information is accurate and not misleading, and a second,
conditional objective requiring an explanation for publicly communicated metrics. 123
The Board is adopting the proposed amendments to QC 1000.53e with
modifications. Specifically, the Board is revising paragraph .53e by adding
subparagraphs .e(1) and .e(2) to more clearly distinguish firm responsibilities when
communicating firm-level or engagement-level information to external parties and in
written public communications. The Board agrees with the commenter that this change
will improve the operability of paragraph .53e without changing a firm’s responsibilities.
In addition, the Board believes that the change will help to address a commenter’s
concern regarding the clarity of the provision’s intent with respect to metrics
communicated in writing and made publicly available by the firm.
The requirement in paragraph .53e(2) applies to any metrics that are
communicated in writing and made publicly available by the firm—it is not limited in
application to metrics that are required to be communicated under applicable professional
and legal requirements. Paragraph .53e(2) also requires a firm to communicate how the
method of determining any metrics changed since previously communicated, if
applicable, and that requirement applies to any such change in methodology, without

122

See id.

123

See comment letter from KPMG.

regard to the firm’s assessment of its materiality. The Board does not believe that it is
necessary to define the term “metric” for purposes of applying paragraph .53e(2). The
Board believes the term is reasonably understood in practice, and the Board previously
clarified, in the supplemental request for comment, that the Board intends for the
requirement to apply only to calculated measures, not to underlying data. 124 As illustrated
in the supplemental request for comment, if a firm publicly discloses its auditoremployee headcount for a region or office, the firm will not need to describe how it
counted the employees. 125 The requirement will apply, however, to any calculated figures
derived using that data, such as the average years of experience for audit personnel (i.e.,
total years of audit experience divided by auditor-employee headcount).
The Board also does not believe it is necessary to clarify that the proposed
amendment would not alter a firm’s monitoring obligations. As stated by the commenter
who suggested doing so, the amendments simplify communication requirements but do
not affect QC 1000 monitoring obligations.
The Board believes that the amendments will carry out its initial intent for public
communications and avoid unnecessary costs associated with making additional
disclosures to recipients who can request more information if they need it, while still
ensuring that recipients of written public communications have access to an explanation
of any metric provided.
In addition, the Board proposed adding a note to paragraph .53e stating that the
explanation of the method for determining metrics can be provided either within the

124

See PCAOB Rel. No. 2026-002, at 25-26.

125

See id.

public written communication that includes the metrics or by referring in the
communication to a publicly available explanation presented elsewhere, such as the
firm’s website.
Several commenters supported allowing firms to provide explanations of metrics
in a publicly available location, such as the firm’s website. 126 One commenter stated that
they supported the proposed amendment provided that those explanations are clear,
balanced, accessible, and sufficiently specific to help users of the metrics. 127 Another
commenter stated that they favored public disclosures in one place for ease of use and
that placement on the relevant website seems appropriate as long as there are clear
instructions on how to access the explanation. 128 The commenter further stated that, while
disclosures on websites are useful, investors would want to make sure that any
restatements, changes in definitions, or metrics are clearly noted, communicated in
writing, and updated on a timely basis. 129 While one commenter agreed that publishing
an explanation of metrics on a website would not adversely affect the utility of metrics
made public, this commenter questioned whether public information about firm metrics
should be subject to certification or verification before publication. 130 Another
commenter said that an explanation that was accurate on the day it was published is of
little use to an investor comparing metrics two or three years later, and that simplification

126

See comment letters from BDO, CFA, GT, KPMG, MIAG, PICPA, and RSM.

127

See comment letter from CAQ.

128

See comment letter from ICGN.

129

See id.

130

See comment letter from Spitters.

of the requirement should not come at the expense of transparency or comparability over
time within a single firm. 131 This commenter requested that the Board require that any
report containing a publicly disclosed metric include, in the report itself, a hyperlink to
the explanation of how that metric is calculated, maintained on the firm’s own website,
and stated that the hyperlink must remain stable, archived, and year specific. 132 This
commenter also said that when a metric or its methodology changes from one year to the
next, the change must be prominently identified in the base report itself—not only in the
linked explanation—together with a description of the change and a presentation of the
comparable prior year metric. 133
After consideration of the comments received, 134 the Board is adopting the note to
paragraph .53e as proposed but relocating it under new paragraph .53e(2).
The Board believes that allowing firms to explain metrics either in the same
communication as the metric itself or by reference to another publicly available
explanation would streamline firms’ communications about their audit practices without
adversely affecting the quality of information received by external parties. The Board
does not believe that permitting firms this flexibility will create confusion for
stakeholders. Given the volume of information that a firm might communicate about
itself, and the possibility that the same information may be repeated through various

131

See comment letter from CFA.

132

See id.

133

See id.

134

One commenter stated that the PCAOB should use existing artificial intelligence technology to
aggregate metrics and related information from firms’ websites or other public sources and make
that information available in a centralized location on the PCAOB’s website. See comment letter
from MIAG. This suggestion is beyond the scope of this rulemaking.

communication platforms, the Board believes that permitting a firm to make reference to
a single publicly available explanation could reduce unnecessary duplication of
disclosures and provide additional clarity to stakeholders. Also for this reason, the Board
believes it is not necessary to require a change made to a metric or its methodology be
identified in the written communication. The Board is not requiring firms to provide
hyperlinks for the metrics because the Board seeks to preserve the principles-based nature
of the requirement and avoid prescribing a specific method that may become less
effective as technology changes over time.
To satisfy paragraph .53e(2), any publicly available explanation, including one
provided through a website, would need to be clear, accessible, and sufficiently specific
to explain how the metric was determined and any changes in the method used to
determine the metric since it was last communicated. In addition, the Board does not
believe that requiring certification or verification of such explanations is necessary to
achieve the objectives of paragraph .53e(2). Firms would need to ensure that their
explanations remained specific as to the public metric to which they relate and are
publicly available for as long as they continue to make available the written public
communication that refers to the location of the metrics. Firms may update the publicly
available explanation as necessary to maintain its accuracy; however, such updates do not
require the issuance of a new written public communication identifying or describing
those updates.
MONITORING AND REMEDIATION PROCESS
1. RESPONDING TO ENGAGEMENT DEFICIENCIES

Engagement monitoring activities are designed to provide information on whether
engagement or QC system-level areas may require additional attention. These activities
may identify pervasive issues where a number of engagements have similar problems,
possibly highlighting the need to revise methodologies, provide additional training, or
take other actions at the QC-system level. QC 1000 requires monitoring activities to
include determining, on a timely basis, whether engagement deficiencies exist and, if so,
taking certain actions in response to the identified engagement deficiencies.
QC 1000 defines an engagement deficiency as an instance of noncompliance with
applicable professional and legal requirements by the firm, firm personnel, or other
participants with respect to an engagement of the firm, or by the firm or firm personnel
with respect to an engagement of another firm. Under QC 1000.68, a firm is required to
take certain action when an engagement deficiency exists, with the required action
depending on circumstances such as whether the engagement is completed or still inprocess or is related to work performed on other firms’ engagements.
i. Engagement deficiency related to an in-process engagement
(QC 1000.68a)
As originally adopted, QC 1000 requires firms, for engagement deficiencies
relating to in-process engagements, to take action to address the deficiency in accordance
with applicable professional and legal requirements (to the extent necessary, before the
issuance of the engagement report(s)), such that the engagement report(s) are appropriate
in the circumstances.
The Board proposed to amend paragraph .68a to (i) replace the language “the
engagement report(s) are appropriate in the circumstances” with “the engagement is free

of significant engagement deficiencies” and (ii) add a footnote describing what
significant engagement deficiencies are. The concept of a significant engagement
deficiency is derived from AS 1220, and the description used in the proposed footnote in
paragraph .68a aligns with that in AS 1220. The footnote to QC 1000.68a also clarifies
that the concept applies to all engagements as that term is defined in QC 1000 (which
includes, for example, engagements performed pursuant to PCAOB interim attestation
standards), not only those engagements described in AS 1220.
Many commenters supported the proposed amendments to paragraph .68a. 135
However, one commenter stated that the proposed threshold for a “significant
engagement deficiency” remained overly broad and could be interpreted to encompass
any instance in which an engagement team failed to perform a procedure required by
PCAOB standards, regardless of whether the omission affected the sufficiency or
appropriateness of audit evidence supporting a material assertion or the engagement
conclusions. 136 This commenter suggested that the definition should incorporate the
concepts of materiality, relevant assertions, and the significance of the deficiency to the
overall audit. 137
The proposed description for when a significant engagement deficiency exists is
consistent with concepts in AS 1220. Under AS 1220, an engagement quality reviewer
(“EQR”) may provide concurring approval of issuance only if, after performing with due
professional care the review required by the standard, the EQR is not aware of a

135

See comment letters from Baker Tilly, CAQ, Deloitte, GT, KPMG, Plante & Moran, and Spitters.

136

See comment letter from PICPA.

137

See id.

significant engagement deficiency. 138 The description of significant engagement
deficiency in the proposed amendments to paragraph .68a appropriately focuses firms on
matters that must be corrected before an audit report is issued or before an engagement
conclusion is communicated to the company. 139 Therefore, the Board does not agree that
the description is overly broad; a significant engagement deficiency would not be any
instance in which an engagement team failed to perform a procedure required by PCAOB
standards but rather is specifically related to the circumstances described in footnote 40A.
Further, the Board believes the concept is well understood by the profession and does not
require any revision.
The Board is adopting the amendments to paragraph .68a as proposed.
ii. Evaluating whether similar engagement deficiencies exist on
other engagements (QC 1000.68d)
As originally adopted, QC 1000 requires that, when the firm determines that an
engagement deficiency exists, the firm should evaluate whether similar engagement
deficiencies exist in other in-process engagements, completed engagements (unless it is
probable that the engagement report is not being relied upon), and work performed on
other firms’ engagements, and if so, take actions as required by paragraphs .68a-c, as
applicable.
The Board proposed to limit the requirement to evaluate whether similar
engagement deficiencies exist so it would apply only with respect to a subset of

138

See Notes to AS 1220.12, .17, .18B.

139

See Proposed Auditing Standard—Engagement Quality Review and Conforming Amendment to
the Board's Interim Quality Control Standards, PCAOB Rel. No. 2008-002 (Feb. 26, 2008), at 16
(describing significant engagement deficiencies).

engagement deficiencies, specifically those that resulted or could result (i) a failure to
obtain sufficient appropriate evidence to support the conclusion reached on an
engagement 140 or (ii) an inappropriate overall conclusion on the subject matter of an
engagement.
Most commenters generally supported the proposed amendments to
paragraph .68d. 141 The Board is adopting the amendments to paragraph .68d as proposed,
along with a new note discussed further below.
The discussion below addresses specific commenter feedback related to the
proposed amendments.
a. “Resulted or could result in”
Several commenters raised concern regarding the proposed language “resulted or
could result in.” 142 Commenters stated that the language would introduce new
complexity 143 and interpretation challenges, 144 or would involve substantial
implementation effort with limited incremental investor protection. 145 One commenter
stated that without further context, the term “could” effectively sets a threshold closer to
a remote possibility, which, in practice, would require firms to evaluate an unbounded

140

Because QC 1000 covers not only audit engagements but also review engagements and attestation
engagements, reference to “sufficient appropriate evidence” is necessary as this concept aligns
with the audit, review, and attestation standards.

141

See comment letters from Baker Tilly, BDO, CAQ, CBIZ, Deloitte, EY, GT, ICGN, KPMG,
PICPA, Plante & Moran, RSM, SCCG, and Spitters.

142

See comment letters from BDO, GT, KPMG, PICPA, and RSM.

143

See comment letter from KPMG.

144

See comment letters from GT and KPMG.

145

See comment letter from PICPA.

population of engagements. 146 This commenter suggested that the Board consider
revising the language to specify that the requirement applies “where there is a reasonable
possibility” that an engagement deficiency could result in either a failure to obtain
sufficient appropriate audit evidence or an inappropriate overall conclusion, to
distinguish from those that represent more remote possibilities. 147 Another commenter
recommended changing the proposed language to “reasonably could result.” 148 Another
commenter stated that it was not clear whether “could” should be assessed at the
individual engagement level or at a broader thematic level, such as when a theme or trend
of similar engagement deficiencies emerges. 149 Another commenter stated that a
deficiency that appears immaterial on the engagement where it was first identified can
still be a symptom of a firm-wide QC weakness and a narrower trigger reduces the
number of opportunities a firm has to find that pattern before it results in an audit
failure. 150 One commenter highlighted that the intended benefits of the proposed
amendment could be offset by concerns regarding specific provisions (i.e., the “could
result in” language). 151 Another commenter stated that it was difficult to determine
whether the proposed amendment will meaningfully reduce complexity, subjectivity, or
implementation costs. 152 The Board is concerned that some commenters may have
146

See comment letter from KPMG.

147

See id.

148

See comment letter from BDO.

149

See comment letter from RSM.

150

See comment letter from CFA.

151

See comment letter from KPMG.

152

See comment letter from GT.

misinterpreted the intent of the phrase “could result in.” As adopted, QC 1000 requires
the firm to evaluate all engagement deficiencies under paragraph .68d. The goal of the
amendment is to narrow the types of engagement deficiencies subject to the evaluation to
only those that relate to obtaining sufficient appropriate evidence or the overall
conclusion of an engagement. 153 Other engagement deficiencies would not need to be
evaluated under paragraph .68d, as amended. Such other engagement deficiencies
include, for example, engagement deficiencies related to communications to the audit
committee; the filing of Form AP, Auditor Reporting of Certain Audit Participants; or the
registration status of an other auditor that performed substantial role work. 154 In other
words, this “could result in” language is not intended to introduce an assessment of the
likelihood that the engagement deficiency could result in, for example, a failure to obtain
sufficient appropriate evidence to support the conclusion on another engagement. This
language is instead intended to help firms assess whether a particular engagement
deficiency falls within either of the two types of engagement deficiencies subject to the
evaluation under the revised paragraph .68d.
For example, if the engagement deficiency related to not making a required
communication to the audit committee, this type of engagement deficiency does not
affect the auditor’s ability to obtain sufficient appropriate audit evidence or reach the

153

With respect to examples of the type of engagement deficiencies that relate to reaching an
inappropriate overall conclusion on the subject matter of an engagement, see PCAOB Rel. No.
2008-002, at 16 n.29, which states that “[i]nappropriate conclusions on the subject matter of the
engagement would include, for example, a failure to appropriately modify the engagement
conclusion in response to: (1) a material departure from generally accepted accounting principles
or (2) a material weakness in internal control over financial reporting.”

154

These types of engagement deficiencies would still be required to be addressed in accordance with
paragraphs .68a-c and to be evaluated to determine whether QC deficiencies exist in accordance
with paragraph .72.

appropriate overall conclusion of the engagement and, therefore, would not be within the
scope of the revised paragraph .68d. In contrast, if the engagement deficiency related to
the auditor not making or observing a physical inventory count in accordance with AS
2510, Auditing Inventories, this type of an engagement deficiency would be within the
scope of paragraph .68d, because it relates to obtaining sufficient appropriate evidence.
Some commenters requested clarification of an example the Board provided in the
supplemental request for comment. 155 To clarify and illustrate the application of the
“resulted or could result in” language in paragraph .68d, consider the following scenario:
During internal monitoring activities for the current year, a firm selected one of its
completed engagements for inspection and identified that the engagement team failed to
evaluate cash confirmation exceptions pursuant to AS 2310.20. As a result, the
engagement team violated PCAOB requirements (i.e., applicable professional and legal
requirements) and the firm determined that an engagement deficiency exists. Because
noncompliance with the requirement of AS 2310.20 (that is, the failure to evaluate
confirmation exceptions) relates to obtaining sufficient appropriate evidence (i.e., it could
result in a failure to obtain such evidence), this engagement deficiency meets the
requirement for evaluation under the revised language of paragraph .68d. 156
The Board believes that the amendment appropriately focuses a firm’s attention
and efforts on the types of engagement deficiencies that represent the greatest risk to
audit quality. It also reduces compliance costs by narrowing the population of
engagement deficiencies that a firm is required to evaluate.

155

See comment letters from Baker Tilly, BDO, CAQ, Deloitte, EY, GT, PICPA, and RSM.

156

The Board has provided a continuation of this example below.

b. “Evaluate whether similar engagement deficiencies exist”
A commenter stated that the nature and extent of the procedures required to
evaluate whether similar engagement deficiencies exist should be more explicitly
grounded in the root cause of the engagement deficiency identified and an assessment of
whether that root cause suggests a potential QC deficiency. 157 This commenter suggested
that an evaluation anchored to root cause would provide a more meaningful and riskbased framework for determining the scope of further procedures. 158 As it relates to the
evaluation required under paragraph .68d, another commenter requested scenarios to help
firms distinguish between engagement deficiencies and identified root causes that are
(i) indicative of systemic issues and (ii) isolated incidents. 159
As described in the QC 1000 2024 adopting release, understanding the nature of
the engagement deficiency will assist the firm in determining the extent of the necessary
evaluation. 160 The intent of the requirement to evaluate whether similar engagement
deficiencies exist was not to require an unbounded look at every engagement the firm
has. The Board believes understanding the circumstances that led to the engagement
deficiency (e.g., the underlying cause) would help the firm identify other engagements to
evaluate for similar engagement deficiencies. The Board acknowledges, as commenters
suggested, that this was not clear in the proposed amendments. Therefore, the Board is
adding a new note to paragraph .68d to indicate that understanding the circumstances that

157

See comment letter from Deloitte.

158

See id.

159

See comment letter from GT.

160

See PCAOB Rel. No. 2024-005, at 225.

led to the engagement deficiency may assist the firm in identifying other engagements (or
work performed by the firm on other firms’ engagements) to evaluate for similar
engagement deficiencies.
The procedures performed can be scalable and practical in the circumstances and
may be developed based on the nature of the engagement deficiency. However, it would
not be appropriate for a firm’s evaluation to be based on narrower criteria than those
underlying the cause(s) for the engagement deficiency, nor would it be appropriate to
include only a subset of the engagements that are identified based on the understanding of
the circumstances that led to the engagement deficiency.
To continue with the example provided above regarding cash confirmations, the
firm then gained an understanding of the circumstances that led to the engagement
deficiency (e.g., the underlying cause) to identify which other engagements to evaluate
for similar engagement deficiencies. In this example, the firm might determine that the
engagement deficiency was caused by an error in the firm’s cash confirmations
methodology, which is required to be used on all engagements that use cash
confirmations. To identify whether other engagements used the same methodology (or, in
the case of in-process engagements, are currently using the same methodology), the firm
sends an inquiry email to each engagement partner. Based on the responses received to
the emails and any follow-up with non-respondents, the firm identifies the engagements
(and work performed on other firms’ engagements) that followed the same methodology.
It is these engagements and work performed on another firm’s engagements that followed
the same methodology that the firm will evaluate for similar engagement deficiencies.

If the firm identifies, for example, twenty engagements that followed the same
cash confirmations methodology, the firm evaluates whether a similar engagement
deficiency exists on each of the twenty engagements, i.e., a failure to evaluate
confirmation exceptions pursuant to AS 2310.20. Out of the twenty engagements, if the
firm identifies four engagements in which the engagement team did not perform
procedures to evaluate confirmation exceptions pursuant to AS 2310.20, then the firm
would need to take appropriate actions pursuant to subparagraphs a-c of paragraph .68 on
each of those four engagements.
Importantly, paragraph .68d does not prescribe the manner in which the firm
would identify engagements to evaluate. In the above example, the firm decided to send
an email to each engagement partner to identify engagements that followed the same
methodology. However, the firm could use other approaches, such as a data analysis tool
or performing a search of engagement files, to identify engagements that followed the
same methodology. The evaluation approach a firm takes may differ depending on the
nature of the engagement deficiency, the circumstances that led to the engagement
deficiency, and a firm’s specific facts and circumstances. As discussed above, once the
firm identifies the population of engagements subject to the evaluation of whether similar
engagement deficiencies exist, it would not be appropriate for a firm’s evaluation to be
based on narrower criteria nor would it be appropriate to evaluate only a subset of the
engagements that were identified.
The following graphic illustrates the process for evaluating whether similar
engagement deficiencies exist:

c. Response to other commenter feedback
One commenter did not support a requirement that would require the firm, after
finding an engagement deficiency in one engagement, to evaluate whether similar
deficiencies exist in all other completed engagements. 161 This commenter stated that the
cost of the requirement could be extremely high and it is unclear whether the benefit
would outweigh the cost. 162 This commenter suggested that the Board instead change the
requirement so that examining a completed engagement would be required only when,
161

See comment letter from AAA.

162

See id.

based on the information available at the time, the firm believed that it was probable the
financial statements were materially misstated and the likelihood was more than remote
that the audit report was still being relied upon. 163 The Board does not agree with the
commenter who stated that the amendment would require that the firm evaluate whether
similar deficiencies exist in all other completed engagements, as the note to
paragraph .68d indicates understanding the circumstances that led to the engagement
deficiency may assist the firm in identifying other engagements to evaluate for similar
engagement deficiencies.
A commenter stated that a deficiency found in one engagement should prompt the
firm to ask whether the same problem exists in other engagements and why it occurred,
with the answers feeding back into the firm’s risk assessment. 164 The Board agrees that
an engagement deficiency identified in one engagement may provide information that is
relevant to the firm’s broader monitoring and remediation and risk assessment processes.
All engagement deficiencies are subject to action as required under paragraph .68a-c (in
that particular engagement), and certain engagement deficiencies will require evaluation
under paragraph .68d. Furthermore, all engagement deficiencies are treated as QC
observations under paragraph .72 and must be evaluated to determine whether they are
QC deficiencies. Additionally, under paragraph .20a(3), the firm obtains an
understanding of information from the firm’s monitoring and remediation activities,
including its identification of engagement deficiencies, in identifying and assessing
quality risks. In this way, the evaluation of engagement deficiencies represents one part

163

See id.

164

See comment letter from CFA.

of the broader monitoring and remediation feedback loop: information identified through
that process informs the firm’s evaluation of QC observations and feeds back into the
firm’s identification and assessment of quality risks.
This commenter also stated that deficiency rates are not materially better than in
the early years of the inspection program more than twenty years ago and suggested this
is not the moment to narrow the lens through which firms look for systemic problems. 165
The Board believes that the amendments to paragraph .68d appropriately focus firms’
evaluations on engagement deficiencies related to obtaining sufficient appropriate
evidence to support the conclusion reached on an engagement or the overall conclusion
on the subject matter of an engagement that may indicate systemic issues on the firm’s
engagements.
A commenter suggested that the Board could further enhance the proposed
amendment by aligning more closely with ISQM 1, which permits firms to use their
judgment to determine the nature and extent of any investigation of identified
engagement deficiencies and whether those deficiencies might indicate a deficiency in
the system of quality management. 166 The Board believes the requirement in
paragraph .68d is fundamental to achieving the objective of the QC system that each
engagement report issued by the firm is in accordance with applicable professional and
legal requirements. 167

165

See id.

166

See comment letter from PICPA.

167

See QC 1000.05.

A commenter questioned why only items (1) and (2) from footnote 40A to
proposed paragraph .68a were included in proposed paragraph .68d, while items (3) and
(4) (the engagement report is not appropriate in the circumstances and the ﬁrm is not
independent of its client, respectively) were not. 168 With regard to paragraph .68d, the
amendment focuses on those types of engagement deficiencies that most directly affect
the sufficiency and appropriateness of procedures performed on the engagement as well
as the ultimate opinion expressed by the firm.
2. DEFINITION OF QC DEFICIENCY
As originally adopted, the note to paragraph .A8(1) of the definition of QC
deficiency states that the likelihood of not achieving the reasonable assurance objective
or one or more quality objectives would be above an acceptably low level if, for example,
a quality objective is not established, a quality risk is not properly identified or assessed,
or a quality response is not properly designed or implemented or is not operating
effectively.
The Board proposed to amend this note to clarify that a failure of a quality
response would be regarded as evidencing a QC deficiency only if other quality
responses do not achieve the relevant objective(s). As stated in the QC 1000 2024
adopting release, the relationship across quality objectives, quality risks, and quality
responses is generally not one-to-one. 169 Most quality objectives are likely to have
multiple quality risks. Some quality risks may affect one or more quality objectives,

168

See comment letter from Grosvenor.

169

See PCAOB Rel. No. 2024-005, at 42.

either within a single component or across several components, and may require multiple
quality responses. Some quality responses may address multiple quality risks.
Many commenters supported the proposed amendment to the definition of QC
deficiency, 170 noting, for example, that allowing firms to take compensating quality
responses into account when determining whether a QC deficiency exists better reflects
how a risk-based system of quality control operates in practice and also aligns more
closely with the principles-based framework of other quality management standards, such
as ISQM 1.
Two commenters suggested revisions to the proposed amendment. 171 One
commenter stated that the rule text could clarify that multiple other quality responses are
not necessarily required by adding the words “one or more” before “other quality
responses” in the Note to paragraph .A8(1) for situations where there is just one other
quality response. 172 The Board believes the rule text is sufficiently clear that the clause
“and other quality responses do not achieve the relevant objective(s)” applies only if the
firm has designed and implemented at least one other quality response relative to the
objective(s). Another commenter suggested amending the definition as follows: “(other
quality responses have been implemented to address the same risk, and) ‘other quality
responses do not achieve the relevant objectives.’” 173 The Board does not believe it is
necessary for the rule text to specify that “other quality responses” must have been
170

See comment letters from AAA, Baker Tilly, BDO, CAQ, Crowe, Deloitte, EY, GT, KPMG,
Kramer, PICPA, Plante & Moran, PwC, RSM, and SCCG.

171

See comment letters from Kramer and Spitters.

172

See comment letter from Kramer.

173

See comment letter from Spitters.

designed and implemented to address the particular quality risk. As stated in the
supplemental request for comment and reiterated here, when firms have implemented
more than one quality response to address the same quality risk, they can take those other
quality responses into account when determining whether a QC deficiency exists.
One commenter expressed concern that without a documented, inspectable basis
for concluding that a “compensating response” actually operated effectively, this
amendment risks becoming a way to explain away deficiencies rather than a genuine test
of whether investors remain protected. 174 Another commenter expressed concern that the
proposed amendment would give firms/networks additional temptation to identify
compensating responses when the linkage is tenuous. 175 The Board believes the revised
note makes clear that, when a quality response is not properly designed or implemented
or is not operating effectively, the other quality responses would need to achieve the
relevant objective(s), that is, they would need to be properly designed, implemented,
tested, and found to operate effectively. And, as one commenter observed, paragraph .82
requires firms to document their evaluation of QC observations to determine whether QC
deficiencies exist and the basis for each determination. 176
Another commenter stated that it is unclear how allowing the evaluation of
compensating controls will work in practice. 177 For example, where a quality risk has a
single response that fails, the commenter stated it was unclear whether firms may

174

See comment letter from CFA.

175

See comment letter from Grosvenor.

176

See comment letter from CFA.

177

See comment letter from RSM.

consider other responses that mitigate other identified risks to support achievement of the
overall objective. 178 This commenter suggested that there may be responses where a
precision level is too high to singularly address a specific risk on their own, but when
considered collectively, may reduce the risk of failing to achieve the objective to an
acceptable level. 179
As explained in the QC 1000 2024 adopting release, the purpose of this note is to
provide examples of circumstances where the likelihood of the firm not achieving the
reasonable assurance objective or one or more quality objectives would not be reduced to
an acceptably low level. 180 The amendments to this note further emphasize that, when a
quality response is not properly designed or implemented or is not operating effectively
and other quality responses do not achieve the relevant objective(s), the likelihood of the
firm not achieving the reasonable assurance objective or one or more quality objectives
has not been reduced to an acceptably low level. Under QC 1000, quality risks are
defined as “[r]isks (whether or not related to intentional acts by firm personnel or other
participants to deceive or to violate applicable professional and legal requirements) that,
individually or in combination with other risks, have a reasonable possibility of occurring
and, if they were to occur, a reasonable possibility of adversely affecting the firm’s
achievement of one or more quality objectives.” The amendment clarifies that, when
firms have implemented more than one quality response to address the same quality risk,
they can take those other quality responses into account when determining whether a QC

178

See id.

179

See id.

180

See PCAOB Rel. No. 2024-005, at 231.

deficiency exists; if the other quality responses were effective in achieving the relevant
objective(s), no QC deficiency would exist.
After consideration of the comments received, the Board is adopting the
amendment to the definition of QC deficiency as proposed.
EVALUATION OF AND REPORTING ON THE QC SYSTEM
1. ANNUAL EVALUATION OF THE QC SYSTEM
i. Evaluation date
As originally adopted, QC 1000 requires that the firm perform an evaluation of
the effectiveness of its QC system annually as of September 30.
The Board proposed to amend QC 1000 to permit firms to select their own annual
evaluation date for their QC system by adding a new defined term, “evaluation date,”
defined as the date selected by the firm as of which to evaluate its QC system under
paragraph .77, and making conforming changes to paragraph .77.
The Board also proposed to include language in a new footnote to guide the firm’s
selection of its evaluation date by recognizing that the firm’s choice may be influenced
by the nature and circumstances of the firm and its engagements, including, for example,
the firm’s fiscal year-end or the timing of monitoring activities.
All commenters who commented on this aspect of the proposed amendments
expressed support. 181 One commenter, who did not object to this aspect of the proposed
amendments, expressed concern that timing should not become a tool for managing
findings and a firm should not be able to use its initial selection, or a later change of date,

181

See comment letters from AAA, Baker Tilly, BDO, CAQ, CBIZ, Crowe, Deloitte, EY, Forvis,
GT, ICGN, KPMG, MIAG, PICPA, Plante & Moran, PwC, RSM, and Spitters.

to defer capturing known or anticipated inspection findings within an evaluation
period. 182 This commenter, however, acknowledged that under the amendments, no
period of time escapes evaluation altogether and any change of evaluation date must be
reported to the Board together with the firm’s rationale for the change. 183 The Board
agrees with the commenter that these are useful guardrails. 184
The choice of evaluation date is an aspect of QC system design and, as such, has
to be made and documented by the time the firm becomes subject to the QC 1000.06
requirement to design, implement, and operate an effective QC system. The firm has to
have the information needed to identify unremediated QC deficiencies and to reach a
conclusion about the effectiveness of its QC system as of the evaluation date, and for the
individuals with ultimate responsibility and accountability and operational responsibility
and accountability for the QC system as a whole, acting with due professional care, to
certify the firm’s report to the PCAOB on its annual evaluation of the QC system. This
suggests that the evaluation date and the firm’s monitoring and remediation cycle ought
to be coordinated so that sufficient, timely information is available when needed about
the implementation and operation of the QC system (including the status of remediation
efforts) and the compliance of the firm’s engagements with applicable professional and
legal requirements. Because of the relationship between the evaluation date and the
firm’s monitoring and remediation activities, The Board does not anticipate that firms
will change their selected evaluation date without a specific reason (e.g., regulatory

182

See comment letter from CFA.

183

See id.

184

See id.

requirements, business combination transactions, or changes in fiscal year or business
cycles).
The Board is adopting these amendments as proposed.
The Board believes allowing each firm to select its evaluation date based on the
firm’s particular facts and circumstances responds to the implementation challenges
experienced by some firms and, in particular, could reduce the burden and costs of
multiple annual evaluations that some firms could have experienced due to differences in
required evaluation dates under QC 1000 versus other regulations to which they are
subject. This change better aligns with the flexibility provided by other quality
management standards, which permit firms to choose their own evaluation date.
Additionally, the Board does not believe that allowing firms to select their own
evaluation date impairs the Board’s ability to carry out its inspection program.
ii. Five-month threshold for the initial evaluation of the firm’s
QC system
The Board proposed to add language to paragraph .77 that would require a
minimum period of operation before a firm is first required to evaluate its QC system.
Under the proposed amendment, a firm would be required to evaluate its QC system once
the firm has been subject to the requirement to design, implement, and operate a QC
system under paragraph .06 for at least five consecutive months (whether due to the
effectiveness of QC 1000 on December 15, 2026, or to the firm’s later becoming subject
to the requirements of QC 1000.06).

Most commenters who commented on this topic supported the proposed
amendment. 185
However, one commenter stated that the proposed approach may create practical
challenges for firms seeking to align their QC 1000 evaluation process with evaluations
performed under other quality management standards, which contemplate annual
evaluation periods that generally do not exceed twelve months. 186 This commenter
observed that a firm that has chosen, for example, March 31 as its evaluation date would
likely be required to perform an evaluation under ISQM 1 or SQMS 1 as of March 31,
2027, while the corresponding QC 1000 evaluation would not occur until March 31,
2028, and would encompass a 15-month evaluation period. 187 This commenter suggested
that the Board could permit firms to perform their initial evaluation of their QC system as
of their selected evaluation date, consistent with their normal quality control processes,
but require the first Form QC filing only for the first 12-month evaluation period ending
after September 30, 2027. 188 This commenter believes that the Board could obtain
information regarding that firm’s initial evaluation, implementation progress, significant
findings, and remediation activities through its oversight activities (e.g., inspections,
implementation outreach, annual data requests, and other regulatory interactions) prior to
the firm’s first Form QC filing. 189 Another commenter stated that, combined with a free

185

See comment letters from Baker Tilly, CAQ, ICGN, KPMG, PICPA, RSM, and Spitters.

186

See comment letter from BDO.

187

See id.

188

See id.

189

See id.

choice of evaluation date, the proposed five-month threshold could defer some firms’
first evaluation well into 2028. 190 This commenter stated that the Board should set an
outer limit so that every firm completes its first evaluation within a reasonable period of
becoming subject to the standard. 191
The Board acknowledges that, depending on the evaluation date chosen by the
firm, the first evaluation period may encompass more than 12 months, but observes that
subsequent periods would proceed on a 12-month cycle (absent a change of the
evaluation date). The Board believes that this approach sets a reasonable outer limit for a
firm’s first evaluation. The Board also believes that the five-month minimum duration of
the initial evaluation period ensures that firms have sufficient information to evaluate the
effectiveness of their QC system. A firm can elect to voluntarily perform its initial
evaluation covering a less-than-five-month period, but that evaluation would not be a
required evaluation under QC 1000. Consequently, under General Instruction 4(a) to
Form QC, the firm’s first Form QC filing would be required to cover the period
beginning on the date the firm first incurred an obligation to implement and operate a QC
system under QC 1000.06 and ending on the firm’s evaluation date.
Another commenter suggested that the five-month period should commence on
the first day of the month immediately following the event that triggers the firm’s
obligation to design, implement, and operate its QC system, which would allow firms a
full five-month operating period on which to base their evaluation. 192 This commenter

190

See comment letter from CFA.

191

See id.

192

See comment letter from KPMG.

also requested that the Board clarify that the five-month period applies solely to the initial
operation of the broader QC system and does not establish a mandatory minimum
operating period for concluding that a specific remedial action is effective. 193 To clarify,
as noted above, a firm becomes subject to the requirements of QC 1000 on
(1) December 15, 2026 (the effective date of QC 1000), or (2) the day the firm becomes
subject to the requirement to design, implement, and operate a QC system under
paragraph .06. Therefore, in all circumstances, a firm’s QC system will have operated for
a full five months or longer before the firm is required to evaluate the effectiveness of its
QC system. Additionally, because the five-month threshold refers to the evaluation of the
effectiveness of the firm’s QC system as a whole, it does not impose any minimum time
requirement for any other purpose other than for QC 1000.77.
Another commenter also suggested that the Board clarify whether engagements
should be included in a firm’s evaluation based on the financial statement year-end or the
date the auditor’s report is issued. 194 This commenter encouraged the Board to clarify
how firms should approach the initial evaluation when the completion of a firm’s
engagements falls outside this five-month timeframe and when the initial evaluation has
little or no engagement activity within the evaluation period. 195
QC 1000 requires that the firm design, implement, and operate a monitoring and
remediation process to provide relevant, reliable, and timely information about the
design, implementation, and operation of the QC system and to provide a reasonable

193

See id.

194

See comment letter from PICPA.

195

See id.

basis for timely detection of engagement deficiencies and QC deficiencies. 196 Firms are
required to monitor completed engagements. 197 A completed engagement is one for
which the firm has issued an engagement report. Firms also are required, depending on
the size of their PCAOB audit practice, to either perform in-process engagement
monitoring 198 or consider doing so. 199 If the firm has no completed engagements during
the firm’s initial evaluation of its QC system, in-process monitoring could provide
relevant, reliable, and timely information about the performance of the firm’s
engagements.
Finally, one commenter questioned the rationale behind the Board’s decision to
use five months as opposed to, for example, six months. 200 In developing the minimum
time period for the initial QC system evaluation, the Board determined and continues to
believe that the five-month threshold strikes the right balance such that the QC system
has ample time to operate while also ensuring the PCAOB’s timely receipt of information
related to firms’ QC systems.
Accordingly, the Board is adopting this amendment as proposed.
To illustrate how the five-month threshold for the initial evaluation of the firm’s
QC system would operate, if a firm that is subject to the requirements of QC 1000.06
when the standard becomes effective (on December 15, 2026) selects June 30 as its

196

QC 1000.59a and b.

197

QC 1000.62a.

198

QC 1000.63a.

199

QC 1000.63b.

200

See comment letter from Spitters.

evaluation date, the firm would first evaluate the effectiveness of its QC system in
accordance with QC 1000 as of June 30, 2027, because the firm would have been
required to operate a QC 1000-compliant system for at least five months (specifically,
from December 15 to June 30) as of June 30, 2027. Alternatively, if such a firm selects
March 31 as its evaluation date, the firm would be required to first evaluate the
effectiveness of its QC system as of March 31, 2028, because the firm would not have
been required to operate a QC 1000-compliant system for at least five months as of
March 31, 2027. As another example, if a firm first became subject to the requirements of
QC 1000.06 on June 1, 2027 (because the firm became subject to applicable professional
and legal requirements with respect to an engagement at that time), and the firm selects
July 31 as its evaluation date, the firm would be required to first evaluate the
effectiveness of its QC system as of July 31, 2028, because the firm would not have been
required to operate a QC 1000-compliant system for at least five months as of July 31,
2027.
iii. Evaluation conclusions
As originally adopted, QC 1000 requires the firm to evaluate its QC system
annually and conclude that the QC system is effective, is effective except for one or more
unremediated QC deficiencies that are not major QC deficiencies, or is not effective (i.e.,
one or more major QC deficiencies exist).
The Board proposed to amend the above three conclusions to align QC 1000 more
closely with other quality management frameworks. Under proposed paragraph .77, the
firm would be required to conclude, as of the evaluation date, that its QC system:
•

Is effective in achieving the reasonable assurance objective; or

•

Is effective in achieving the reasonable assurance objective except for
unremediated QC deficiencies that have a severe but not pervasive effect on
the design, implementation, and operation of the QC system (and do not
render the QC system not effective); or

•

Is not effective in achieving the reasonable assurance objective.

To clarify when a firm may conclude that its QC system is effective in achieving
the reasonable assurance objective under paragraph .77a, the Board proposed to include a
note explaining that such a conclusion would be appropriate when, as of the evaluation
date, there are no unremediated QC deficiencies other than those that, individually or in
combination, are not severe. This clarification was intended to emphasize that the
presence of unremediated QC deficiencies did not, in all cases, preclude a conclusion
under paragraph .77a that the QC system is effective. Rather, the determination would
depend on the severity of those deficiencies and their effect on the firm’s ability to
achieve the reasonable assurance objective. Under the proposed approach, QC
deficiencies that are not severe, whether considered individually or in combination,
would not indicate that the QC system is failing to operate effectively, which would be
consistent with the ISQM 1 evaluation framework and the reasonable assurance objective
of QC 1000.
Under proposed paragraph .77b, a firm would conclude that its QC system was
effective in achieving the reasonable assurance objective except for unremediated QC
deficiencies that have a severe but not pervasive effect on the design, implementation,
and operation of the QC system (and do not render the QC system not effective). To
clarify, when evaluating the effect of unremediated QC deficiencies on the QC system, a

firm would evaluate whether the QC deficiencies have a severe but not pervasive effect
on each of the following: (1) the design of the QC system, (2) the implementation of the
QC system, and (3) the operation of the QC system. Therefore, with respect to the
conclusion under paragraph .77b, QC deficiencies may have a severe but not pervasive
effect on the design, implementation, or operation of the QC system; they need not have
such an effect on all three aspects of the QC system for a firm to reach the conclusion
under proposed paragraph .77b. The parenthetical statement is intended to clarify that if
QC deficiencies are so severe as to prevent the firm from achieving the reasonable
assurance objective, the appropriate conclusion would be under proposed paragraph .77c.
A firm would reach the conclusion set forth in paragraph .77c if its QC system was not
effective in achieving the reasonable assurance objective.
QC 1000 specifies that an unremediated QC deficiency is one for which remedial
actions that completely address the QC deficiency have not been fully implemented,
tested, and found effective. The Board proposed to modify the existing note to
paragraph .77 to explain that, while remedial actions must be fully implemented as of the
evaluation date, they can be tested and found effective no later than the date Form QC is
due under paragraph .79 (or, if earlier, the date Form QC is filed). The note distinguishes
between the implementation of remedial actions and the demonstration of their
effectiveness. For purposes of determining whether a QC deficiency is remediated, firms
are expected to have fully implemented remedial actions as of the evaluation date, but the
assessment of whether those actions are operating effectively may be supported by testing
their operating effectiveness after the evaluation date but before the Form QC filing date.

Commenters supported the proposed amendments to the evaluation framework
and evaluation conclusions, particularly the effort to align more closely with other quality
management standards. 201 Several commenters noted that this alignment would reduce
the complexity of managing evaluations under multiple frameworks and help avoid
potential confusion among stakeholders. 202 Two commenters observed that the threetiered conclusions framework better supports informed decision-making and meaningful
communication with stakeholders, and reflects a more accurate representation of how QC
systems operate in practice. 203 Two other commenters noted that the proposed evaluation
framework would enhance transparency by allowing firms to distinguish among varying
degrees of effectiveness, including through the use of the “except for” conclusion. 204 One
commenter further stated that the proposed evaluation framework better aligns with the
reasonable assurance objective because it clarifies that a QC system may provide
reasonable assurance even when unremediated QC deficiencies exist. 205 In addition, some
commenters indicated that the proposed conclusions in paragraph .77 were sufficiently
clear and appropriate. 206 One commenter stated the evaluation framework in proposed
paragraphs .77-.78 is generally clear but requested clarification on the latitude of firms to

201

See comment letters from AAA, Baker Tilly, BDO, CAQ, CBIZ, Deloitte, EY, Forvis, GT, ICGN,
KPMG, PICPA, Plante & Moran, PwC, and RSM.

202

See comment letters from Baker Tilly, Deloitte, EY, Forvis, and KPMG.

203

See comment letters from BDO and CBIZ.

204

See comment letters from Baker Tilly and GT.

205

See comment letter from KPMG.

206

See comment letters from GT, KPMG, and Spitters.

change their conclusions as of the evaluation date if, before the date that Form QC is
filed, a firm identifies shortcomings when further testing its remedial actions. 207
While commenters generally supported the proposed framework, one commenter
recommended expanding the “except for” category to include both “severe but not
pervasive” and “pervasive but not severe” unremediated QC deficiencies to minimize
potential blurring among the conclusion categories. 208 This commenter expressed concern
that a conclusion under paragraph .77a could be confusing because a firm may arrive at a
favorable conclusion despite having experienced significant quality control issues during
the evaluation period that were subsequently remediated. 209 The same commenter also
noted that deficiencies may take time to become apparent and suggested requiring
statements or certifications indicating that firms considered previously unidentified
deficiencies relating to prior years in their evaluations. 210 Another commenter urged the
Board to retain the “effective, with no unremediated QC deficiencies” conclusion as
originally adopted. 211 The commenter expressed concern that allowing firms to reach an
unqualified “effective” conclusion despite the existence of unremediated QC deficiencies
would broaden the circumstances in which firms may reach a favorable conclusion. 212

207

See comment letter from Kramer.

208

See comment letter from Grosvenor.

209

See id.

210

See id.

211

See comment letter from CFA.

212

See id.

One commenter supported the proposed modification to the existing note to
paragraph .77 because it provides helpful guidance and better reflects how remediation
occurs in practice. 213 Another commenter questioned whether the phrase “completely
address” in the first sentence of the note, which is not part of the proposed modification,
establishes an unnecessarily stringent standard and suggested replacing it with
“sufficiently address.” 214 Another commenter requested clarification on the description in
the release for determining whether a QC deficiency is remediated, specifically whether
the phrase “may be supported by evidence obtained from testing after the evaluation
date” refers to testing of instances that occurred before the evaluation date or the related
response activities after the evaluation date. 215 One commenter requested clarification on
how firms should assess the effect of remediation efforts when frequency constraints
preclude testing enough instances of the remedial actions in evaluating remaining QC
deficiencies. 216
In developing the proposed amendments to paragraph .77, the Board also
considered an alternative evaluation framework under which a firm would be required to
reach a binary conclusion (i.e., that its QC system is either effective or not effective in
achieving the reasonable assurance objective).
One commenter stated that a binary conclusion may be particularly appropriate
for many triennial firms and suggested that a binary framework would simplify the

213

See comment letter from KPMG.

214

See comment letter from Grosvenor.

215

See comment letter from RSM.

216

See comment letter from CBIZ.

evaluation process. 217 Another commenter stated that whether the alternative evaluation
framework with a binary conclusion is more appropriate is undefined, and it would be
appropriate and constructive to retain the factors included in paragraph .78 (which are
discussed further below) under this alternative framework. 218
Many commenters did not support the binary approach for the evaluation
framework. 219 Some commenters were concerned that it would limit firms’ ability to
communicate the nature and severity of identified deficiencies and would de

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Source: Frix Law Library, https://www.frixlaw.com/law-library/documents/agency%3Asec%3A653d433b5d9d9c06. Public record. Not legal advice.
