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AASB

Auditing and Assurance Standards Board

About the AASB

The Auditing and Assurance Standards Board (AASB) establishes standards for assurance and related services engagements. We contribute to the development of International Standards on Auditing (ISAs), which we adopt as Canadian Auditing Standards (CASs), by participating in consultations and activities of the International Auditing and Assurance Standards Board (IAASB) to ensure Canadian entities’ auditing needs are considered.

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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 ISSB’s proposals. Share your views and help shape Canadian auditing standards by November 2, 2026.

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 and share your views on the proposed changes.

Meeting & event summaries

See all meetings & events summaries
September 9, 2026 AASB Decision Summary – September 9, 2026

At its September 9, 2026, meeting, the AASB discussed key developments in Canadian and international auditing and assurance standard setting. Discussions included the proposed way forward following the IAASB’s post-implementation review of International Standard on Auditing (ISA) 540 (Revised), Auditing Accounting Estimates and Related Disclosures, key issues in the targeted standards in the ISA 500 series project, and the IAASB’s Technology Quality Management Guides. Read the decision summary for full details.

June 8-9, 2026 AASB Decision Summary – June 8-9, 2026

At its June 2026 meeting, the AASB discussed ongoing international and Canadian standard-setting projects, including Audit Evidence and Risk Response, Targeted Standards in the International Standard on Auditing 500 series, Technology Quality Management Workstream, and ongoing activities to support audits of less complex entities in Canada. Read the decision summary for full details.

March 9-10, 2026 AASB Decision Summary – March 9-10, 2026

At its March meeting, the AASB approved two new Canadian standards: CSRS 4250, Compilation Engagements on Future-oriented Financial Information (FOFI) and Pro Forma, and CSSA 5000, General Requirements for Sustainability Assurance Engagements. The Board also approved its 2025–2026 Performance Assessment and 2026–2027 Annual Plan and discussed several significant standard-setting initiatives currently underway. Read the decision summary for full details.

Upcoming meetings & events

See all upcoming meetings and events
January 19, 2026 AASB Decision Summary – January 19, 2026

At the AASB’s January 19, 2026, meeting, the Board completed a final read and resolution of issues prior to the anticipated approval of proposed CSRS 4250, Compilations of Future-oriented Financial Information and Pro Forma. They also discussed planned activities associated with the Board’s continuing work on the amendments related to Indigenous matters in CSSA 5000, General Requirements for Sustainability Assurance Engagements. Read the decision summary for full details.

News

See all 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).

October 2, 2026 News, Article
What You Need to Know about Canadian Standard on Related Services (CSRS) 4250, Compilation Engagements on Future-oriented Financial Information and Pro Forma

Want to learn how the new compilation standard, CSRS 4250, may impact you as a practitioner, a user of FOFI or pro forma, management, or as a governance professional? We’ve created a short resource to highlight key facts about CSRS 4250. Don’t miss out on this helpful resource.

October 2, 2026 Resource
What You Need to Know about Canadian Standard on Related Services (CSRS) 4250, Compilation Engagements on Future-oriented Financial Information and Pro Forma

Short on time but want to know how this change impacts you as a practitioner, a user of FOFI or pro forma, management, or a staff member charged with governance? Read our educational guide for more details! 

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 ISSB’s proposals. Share your views and help shape Canadian auditing standards by November 2, 2026.

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 and share your views on the proposed changes.

Meeting & event summaries

See all meetings & events summaries
September 9, 2026 AASB Decision Summary – September 9, 2026

At its September 9, 2026, meeting, the AASB discussed key developments in Canadian and international auditing and assurance standard setting. Discussions included the proposed way forward following the IAASB’s post-implementation review of International Standard on Auditing (ISA) 540 (Revised), Auditing Accounting Estimates and Related Disclosures, key issues in the targeted standards in the ISA 500 series project, and the IAASB’s Technology Quality Management Guides. Read the decision summary for full details.

June 8-9, 2026 AASB Decision Summary – June 8-9, 2026

At its June 2026 meeting, the AASB discussed ongoing international and Canadian standard-setting projects, including Audit Evidence and Risk Response, Targeted Standards in the International Standard on Auditing 500 series, Technology Quality Management Workstream, and ongoing activities to support audits of less complex entities in Canada. Read the decision summary for full details.

March 9-10, 2026 AASB Decision Summary – March 9-10, 2026

At its March meeting, the AASB approved two new Canadian standards: CSRS 4250, Compilation Engagements on Future-oriented Financial Information (FOFI) and Pro Forma, and CSSA 5000, General Requirements for Sustainability Assurance Engagements. The Board also approved its 2025–2026 Performance Assessment and 2026–2027 Annual Plan and discussed several significant standard-setting initiatives currently underway. Read the decision summary for full details.

Upcoming meetings & events

See all upcoming meetings and events
October 13, 2026 Virtual Roundtable Discussions – AASB Exposure Draft, “Proposed Revisions to the Canadian Auditing Standards for Audit Evidence and Risk Response”  English Roundtable - October 7, 2026 12:00pm - 3:00pm EST French Roundtable - October 13, 2026 12:00pm - 3:00pm EST

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).

News

See all 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).

October 2, 2026 News, Article
What You Need to Know about Canadian Standard on Related Services (CSRS) 4250, Compilation Engagements on Future-oriented Financial Information and Pro Forma

Want to learn how the new compilation standard, CSRS 4250, may impact you as a practitioner, a user of FOFI or pro forma, management, or as a governance professional? We’ve created a short resource to highlight key facts about CSRS 4250. Don’t miss out on this helpful resource.

October 2, 2026 Resource
What You Need to Know about Canadian Standard on Related Services (CSRS) 4250, Compilation Engagements on Future-oriented Financial Information and Pro Forma

Short on time but want to know how this change impacts you as a practitioner, a user of FOFI or pro forma, management, or a staff member charged with governance? Read our educational guide for more details!