Skip to main content

Canadian Auditing Standards

Audit Evidence & Risk Response

Summary

The business environment is experiencing rapid technological developments, which are affecting the nature, volume, and sources of information used by entities in their operations and by auditors as audit evidence. There has also been an increase in the availability and sophistication of technology used in audit engagements that impact the auditor’s design and performance of procedures in obtaining and evaluating sufficient appropriate audit evidence.

The Audit Evidence and Risk Response project aims to concurrently address revisions to the following standards to holistically address the “reference framework” and the “performance” aspects of obtaining and evaluating audit evidence:

  • CAS 330, The Auditor’s Responses to Assessed Risks;
  • CAS 500, Audit Evidence; and
  • CAS 520, Analytical Procedures.

Staff Contact(s)

Birender Gill, CPA, CA Principal, Auditing and Assurance Standards Board

Project Status

  • Information gathering
  • Approving project

    The IAASB approved the project proposal for the Audit Evidence & Risk Response project at the December 2024 meeting

  • Engaging communities

    AASB issued Exposure Draft, “Proposed Revisions to the Canadian Auditing Standards for Audit Evidence and Risk Response”

    IAASB issued Exposure Drafts, “Strengthening the Risk-based Audit Framework: Proposed Revisions to ISA 330, ISA 500 and ISA 520”

  • Deliberating feedback
  • Final pronouncement

News


October 13, 2026

Meeting, News

Virtual Roundtable Discussions – AASB Exposure Draft, “Proposed Revisions to the Canadian Auditing Standards for Audit Evidence and Risk Response” 

Your opinion matters! Join an upcoming roundtable discussion on the AASB’s Exposure Draft, “Proposed Revisions to the Canadian Auditing Standards (CASs) for Audit Evidence and Risk Response.”. Share your views and help ensure the proposed changes to CAS 330, The Auditor’s Responses to Assessed Risks, CAS 500, Audit Evidence, and CAS 520, Analytical Procedures work for Canadians. Register for a session on October 7, 2026 (English), or October 13, 2026 (French).

August 26, 2026

Document for Comment

AASB Exposure Draft, “Proposed Revisions to the Canadian Auditing Standards for Audit Evidence and Risk Response”

The AASB is seeking feedback on proposed revisions to CAS 330, CAS 500, and CAS 520, based on the IAASB’s proposals. Share your views and help shape Canadian auditing standards by November 2, 2026. 

August 20, 2026

International Activity

IAASB Issues Exposure Drafts on Proposed Standards for Audit Evidence and Risk Response

The International Auditing and Assurance Standards Board issued its Exposure Drafts proposing revisions to International Standard on Auditing (ISA) 330 (Revised), The Auditor's Responses to Assessed Risks; ISA 500, Audit Evidence; and ISA 520, Analytical Procedures.

The proposed changes aim to strengthen the risk-based audit framework, including how auditors assess and respond to risk, evaluate audit evidence, and apply professional skepticism. They also aim to improve alignment across the audit process and support innovation while remaining principles based. Review the Exposure Drafts and submit your comments to the IAASB by December 15, 2026. 

May 30, 2023

News

AASB Responds to the IAASB’s Exposure Draft of ISA 500, Audit Evidence

The Board recently submitted a response letter to the IAASB on the Exposure Draft, ISA 500, Audit Evidence. Read the response letter to learn more.

December 13, 2022

Webinar, Resource

On-demand Webinar – Exposure Draft – CAS 500, Audit Evidence

Are you interested in hearing about the proposed changes to CAS 500, Audit Evidence? Watch the recorded webinar, hosted by CPA Canada, to learn about the subject from members of the AASB’s Audit Evidence Advisory Group.

November 23, 2022

Document for Comment

AASB Exposure Draft – CAS 500, Audit Evidence

Share your views on the revisions to CAS 500, Audit Evidence. The proposed changes are now available for stakeholders to provide input. Read the full proposed standard and the related conforming and consequential amendments and respond to the Exposure Draft by March 15, 2023.

November 8, 2022

International Activity

IAASB issues Exposure Draft of ISA 500, Audit Evidence

The International Auditing and Assurance Standards Board (IAASB) issued its Exposure Draft of International Standard on Auditing (ISA) 500, Audit Evidence and the related proposed conforming and consequential amendments to other ISAs. The standard provides a “reference framework” for auditors when making judgments about audit evidence throughout the audit. The IAASB invites all stakeholders to comment on the Exposure Draft via the IAASB website. Comments are requested by April 24, 2023.

Meeting & event summaries


July 8, 2026

AASB Decision Summary – June 8-9, 2026

The AASB discussed the IAASB’s project to revise International Standard on Auditing (ISA) 330, The Auditor’s Responses to Assessed Risks; ISA 500, Audit Evidence; and ISA 520, Analytical Procedures. Key issues discussed included:

  • the circumstances in which tests of controls alone may be appropriate;
  • the auditor’s assessment of accuracy and completeness when evaluating the reliability of information from sources internal to an entity;
  • the procedures the auditor is required to perform when evaluating the reliability of the information intended to be used as audit evidence; and
  • whether ISA 500 requires a specific documentation requirement.

The AASB also discussed issues related to the approval of the Canadian exposure draft of proposed amendments to Canadian Auditing Standard (CAS) 330, The Auditor’s Responses to Assessed Risks; CAS 500, Audit Evidence; and CAS 520, Analytical Procedures. Key issues discussed included:

  • identifying the proposed Canadian amendments to the three standards;
  • determining the exposure period and timing in Canada;
  • developing potential content and questions for this exposure draft;
  • developing the AASB’s engagement plan; and
  • reviewing key steps to ensure compliance with the AASB’s due process.

The IAASB expects to approve its exposure draft of the three standards at its June 2026 meeting. The AASB expects to approve its Canadian exposure draft in late July and issue it in late August. Outreach activities are planned for September and October 2026.

April 7, 2026

AASB Decision Summary – March 9-10, 2026

The AASB discussed issues related to the IAASB’s project to revise International Standard on Auditing (ISA) 330, The Auditor’s Responses to Assessed Risks; ISA 500, Audit Evidence; and ISA 520, Analytical Procedures. Key issues discussed include:

  • clarifying that an analytical procedure that does not meet the definition of a substantive analytical procedure, can still provide audit evidence when performed in combination with tests of detail or tests of controls;
  • determining when tests of controls alone may be appropriate;
  • the auditor’s responsibilities with respect to obtaining audit evidence about the operating effectiveness of indirect controls that support the effective operation of direct controls;
  • clarifying the auditor’s consideration of the attributes of reliability, when evaluating the relevance and reliability of information intended to be used as audit evidence;
  • potential content for an appendix in ISA 500 related to the auditor’s use of technological tools; and
  • considering the significant consequential amendments to ISA 315, Identifying and Assessing the Risks of Material Misstatement.

At its June 2026 meeting, the IAASB is expected to approve an exposure draft of the three standards. The AASB will approve its Canadian exposure draft soon thereafter.

January 6, 2026

AASB Decision Summary – December 1-2, 2025

The AASB discussed issues related to the International Auditing and Assurance Standards Board’s (IAASB) project to revise International Standard on Auditing (ISA) 330, The Auditor’s Responses to Assessed Risks; ISA 500, Audit Evidence; and ISA 520, Analytical Procedures. Key issues discussed included:

  • different options for revising paragraph 18 of ISA 330;
  • aligning requirements in ISA 330 and ISA 500 regarding evaluating relevance and reliability of information;
  • proposed changes to analytical procedures in ISA 520;
  • proposed requirement for selecting items for testing; and
  • placement of a “stand-back” requirement in ISA 700, Forming an Opinion and Reporting on Financial Statements.

At its March 2026 meeting, the AASB will continue to discuss these and other issues, as it follows the IAASB’s progress on this project. The IAASB is expected to approve the exposure drafts of the three standards in June 2026.

September 9, 2025

AASB Decision Summary – September 9, 2025

The AASB discussed issues related to the International Auditing and Assurance Standards Board’s (IAASB) project to revise International Standard on Auditing (ISA) 330, The Auditor’s Responses to Assessed Risks; ISA 500, Audit Evidence; and ISA 520, Analytical Procedures. Key issues discussed included:

  • options for revising the requirement to design and perform substantive procedures on material classes of transactions, account balances and disclosures that are determined not to be significant (paragraph 18 of extant ISA 330);
  • whether to allow use of tests of controls alone;
  • the auditor’s work related to authenticity of information intended to be used as audit evidence;
  • whether a requirement is needed in the ISAs related to use of technology by auditors; and
  • work effort for investigating results of analytical procedures and substantive analytical procedures.

July 7, 2025

AASB Decision Summary – June 9-10, 2025

The AASB discussed issues related to the IAASB’s project to revise International Standard on Auditing (ISA) 330, The Auditor’s Responses to Assessed Risks; ISA 500, Audit Evidence; and ISA 520, Analytical Procedures. Key issues discussed included:

  • definitions for “tests of details,” “substantive analytical procedures,” and “analytical procedures”;
  • designing and performing a “substantive analytical procedure”;
  • using audit evidence from previous audits;
  • positioning of the stand-back requirement from ISA 330; and
  • application material related to automated tools and techniques.

March 10, 2025

AASB Decision Summary – March 10-11, 2025

The AASB discussed issues related to the International Auditing and Assurance Standards Board’s (IAASB) project to revise International Standard on Auditing (ISA) 330, The Auditor’s Responses to Assessed Risks, ISA 500, Audit Evidence, and ISA 520, Analytical Procedures. Key issues discussed included:

  • alternative options for the placement of the stand-back requirement, currently in paragraph 26 of ISA 330;
  • a description of automated tools and techniques, and placement of the description in the ISAs;
  • challenges identified with the current requirement for performing audit procedures for each material class of transactions, accounting balances, and disclosures (paragraph 18 of ISA 330); and
  • whether test of controls alone can provide sufficient appropriate audit evidence at the assertion level.

December 3, 2024

AASB Decision Summary – December 2-3, 2024

The AASB discussed the draft project proposal developed by the IAASB for revisions to ISA 500, Audit Evidence, ISA 330, The Auditor’s Responses to Assessed Risks, and ISA 520, Analytical Procedures – to be known as the Integrated Project. Key issues discussed included:

  • intersection of the Technology Gap Analysis with this project; 
  • consideration of activities to address issues identified under this project; and 
  • the timeline for the project.

The IAASB is expected to approve the project proposal at its December meeting.

The AASB also discussed and was supportive of establishing an advisory group to inform the work on this project. The Board considered the composition of the advisory group, the skill sets needed among members, and the timeline for recruitment.


March 12, 2024

AASB Decision Summary – March 11-12, 2024

The AASB discussed issues related to the IAASB’s information gathering for an integrated project on risk response. Key issues discussed included:

  • how to use audit evidence about the operating effectiveness of controls obtained in previous periods;
  • what challenges are present in carrying out the requirement to perform substantive procedures for material classes of transactions, account balances and disclosures, irrespective of risk;
  • situations where testing operating effectiveness of controls should be required;
  • the root cause of issues related to nature, timing, and extent of testing controls; and
  • whether a revision to ISA 520, Analytical Procedures, is necessary.

January 4, 2024

AASB Decision Summary – December 4-5, 2023

The AASB discussed issues related to the International Auditing and Assurance Standards Board’s (IAASB) proposed revisions to International Standard on Auditing (ISA) 500, Audit Evidence. Key issues discussed included:

  • the new requirement for when the auditor uses automated tools and techniques for obtaining audit evidence;
  • the conditional requirement related to accuracy and completeness; and
  • the way forward for the project and its completion timeline.

October 10, 2023

AASB Decision Summary – September 12-13, 2023

The AASB discussed issues related to the International Auditing and Assurance Standards Board’s (IAASB) project to revise International Standard on Auditing (ISA) 500, Audit Evidence. Key issues discussed included:

  • the modernizing of the standard with respect to technology by including a conditional requirement for when the auditor uses automated tools and techniques during the audit;
  • the addition of a definition for persuasiveness in the standard and whether the term needed to be elevated to a requirement;
  • the clarification of how the auditor determines which attributes to consider when evaluating relevance and reliability of information intended to be used as audit evidence;
  • whether to clarify the conditional requirement to consider accuracy and completeness in relation to information generated by the entity only; and
  • whether the stand-back requirement was duplicative with the requirement in ISA 330, The Auditor’s Responses to Assessed Risks.

April 26, 2023

AASB Decision Summary – April 5, 2023

The AASB discussed comments received on its Exposure Draft, “CAS 500, Audit Evidence” and reviewed a draft of its response letter to the IAASB’s Exposure Draft of ISA 500, Audit Evidence. Key issues discussed included:

  • the key overall messages of the response letter;
  • how the auditor’s use of technology was addressed in the Exposure Draft and whether the response letter should advocate for non-authoritative guidance outside of the standard, or a specific requirement in the standard; and
  • the level of engagement achieved with interested and affected parties, as outlined in the outreach plan for the project.

The AASB will submit its response in advance of the IAASB’s deadline on April 24, 2023.

April 4, 2023

AASB Decision Summary – March 13-14, 2023

The AASB reviewed feedback received on the Exposure Draft of the proposed CAS 500, Audit Evidence. Key matters discussed included:

  • the outreach activities completed related to the Exposure Draft;
  • the key issues identified by respondents to the proposed changes; and
  • the proposed direction for responses to the International Auditing and Assurance Standards Board’s (IAASB) Exposure Draft questions.

The AASB will review and discuss a draft of its response letter at its April 2023 meeting.

November 15, 2022

AASB Decision Summary – October 25, 2022

The AASB discussed issues related to the International Auditing and Assurance Standards Board’s (IAASB) project to revise International Standard on Auditing (ISA) 500, Audit Evidence.

Key issues included:

  • the revisions the IAASB made to the proposed changes to ISA 500 in finalizing its exposure draft; 
  • the conforming and consequential amendments related to ISA 500;
  • the matters related to the Canadian Exposure Draft, including the comment period and fatal-flaw review of the French translation; and
  • a review of the Canadian wrap-around document to be issued as part of the Canadian exposure draft.

The AASB approved the exposure draft, which it expects to issue in late November 2022, with a comment deadline of March 15, 2023.

October 3, 2022

AASB Decision Summary – September 8-9 2022

The AASB discussed issues related to the International Auditing and Assurance Standards Board’s (IAASB) proposed revisions to International Standard on Auditing (ISA) 500, Audit Evidence. Key issues included:

  • a full review of proposed ISA 500;
  • the conforming and consequential amendments related to ISA 500;
  • the exposure period and the proposed implementation period; and
  • the topics to be covered in the explanatory memorandum accompanying the exposure draft of ISA 500.

The IAASB expects to approve an exposure draft at its September 2022 meeting. The AASB would then approve a Canadian exposure draft shortly after.

June 27, 2022

AASB Decision Summary – June 6-7 2022

The AASB discussed the International Auditing and Assurance Standards Board’s (IAASB) proposed revisions to International Standard on Auditing (ISA) 500, Audit Evidence. Key issues discussed included:

  • the objectives of the standard;
  • the definition for audit evidence;
  • the addition of general information technology control examples in the standard;
  • the inclusion of a diagram on ISA 500 in the explanatory memorandum to the exposure draft; and
  • the conforming amendments related to ISA 500.

May 18, 2022

AASB Decision Summary – May 5, 2022

The AASB discussed the International Auditing and Assurance Standards Board’s proposed International Standard on Auditing (ISA) 500, Audit Evidence. Key issues discussed included:

  • how persuasiveness relates in determining sufficient and appropriate audit evidence;
  • presenting biases that impact the auditor; and
  • clarifying the use of remote observation as an audit procedure.

April 12, 2022

AASB Decision Summary – March 7-8, 2022

The AASB provided input to the International Auditing and Assurance Standards Board (IAASB) members from Canada on issues related to the IAASB’s project to revise International Standard on Auditing (ISA) 500, Audit Evidence. Key issues discussed included:

  • the first read of the proposed revised requirements;
  • how technology is addressed in the proposed revisions; and
  • potential conforming and consequential amendments as a result of revisions to ISA 500.

The AASB will review the proposed application material to the revised standard at a future meeting.

July 15, 2021

AASB Decision Summary – July 15, 2021

The AASB provided input to the International Auditing and Assurance Standards Board (IAASB) members from Canada on issues related to the IAASB’s project to revise International Standard on Auditing (ISA) 500, Audit Evidence. Key issues discussed included:

  • the proposed approach for using the terms “consistent and inconsistent” and “corroborate and contradict” in the context of exercising professional skepticism relating to audit evidence; and
  • including new requirements in the proposed standard to:
    • address professional skepticism, and
    • conclude whether sufficient appropriate audit evidence has been obtained.

December 15, 2020

AASB Decision Summary – November 30 – December 1, 2020

The AASB provided input to the International Auditing and Assurance Standards Board (IAASB) members from Canada on the IAASB Working Group’s project proposal to revise International Standard on Auditing (ISA) 500, Audit Evidence.

Key issues discussed included:

  • developing a set of factors in relation to, or attributes of, information for auditors to use when considering information to use as audit evidence;
  • differentiating the auditor’s work effort in relation to information to use as audit evidence; and
  • introducing and defining the concept of persuasive audit evidence.

June 8, 2020

AASB Decision Summary – June 8-9, 2020

The AASB discussed the International Auditing and Assurance Standards Board’s (IAASB) proposals for the way forward in relation to audit evidence, including a proposal to revise International Standard on Auditing (ISA) 500, Audit Evidence.

The IAASB plans to discuss this topic at its June 2020 meeting.

March 9, 2020

AASB Decision Summary – March 9-10, 2020

The AASB discussed the International Auditing and Assurance Standards Board’s (IAASB) information gathering and targeted outreach activities related to audit evidence, as well as the stakeholder consultation plan for Canada. Issues discussed included matters that the Board believes are causing the most difficulties with audit evidence in practice and how these matters can be best addressed.

June 10, 2019

AASB Decision Summary – June 10-11, 2019

The AASB decided to form an advisory group to provide input to the Board on issues as the International Auditing and Assurance Standards Board (IAASB) audit evidence project progresses. The Board discussed the size of the advisory group and relevant experience that members should have. The Board will issue a public call to identify and engage potential members.

Disclaimer

This project summary has been prepared for information purposes only. Decisions reported are tentative and reflect only the current status of discussions on this project, which may change after further Board deliberations. Decisions to publish Handbook material are final only after a formal voting process.