Skip to main content

Other Canadian Standards

Sustainability Assurance

Summary

Sustainability/environmental, social, and governance (ESG) reporting has quickly become a matter of global importance. A broad range of interested and affected parties are calling on organizations to be transparent about sustainability/ESG matters. Globally, organizations are shifting from voluntary reporting to reporting in accordance with requirements mandated by jurisdictions. As organizations expand their reporting on sustainability matters, interested and affected parties are increasingly demanding assurance on this information.

The International Auditing and Assurance Standards Board (IAASB) is currently working on a project to develop an overarching standard for assurance on sustainability reporting, proposed International Standard on Sustainability Assurance (ISSA) 5000, General Requirements for Sustainability Assurance Engagements. In its development, the IAASB has leveraged its existing assurance standards on non-financial information (International Standard on Assurance Engagements (ISAE) 3000 is equivalent to Canadian Standard on Assurance Engagements (CSAE) 3000), extended external reporting (EER) non-authoritative guidance, and the ISAs, that can be used globally by all assurance professionals. See the IAASB project page for the status of its activities. 

The AASB is monitoring the IAASB’s progress on this initiative, including providing feedback on the IAASB’s meeting agenda papers and has approved a project to adopt ISSA 5000 concurrently in Canada as Canadian Standard on Sustainability Assurance (CSSA) 5000, General Requirements for Sustainability Assurance Engagements. The AASB’s Sustainability Assurance Committee  supports the AASB in reviewing and responding to materials issued by the IAASB.

In addition, over the last few years, the AASB has undertaken several activities to support assurance in this area, including:

  1. conducting outreach activities on the challenges practitioners face when providing assurance over sustainability information (both stand-alone reporting and reporting integrated within the financial statements);
  2. listening and contributing to international deliberations on this topic, including participating in National Standard Setters (NSS) discussions;
  3. establishing the Extended External Reporting Assurance Advisory Group to support the AASB in reviewing and responding to materials issued by the IAASB; 
  4. issuing non-authoritative guidance on applying CSAE 3000 to sustainability and other extended external reporting assurance engagements; and
  5. developing a set of frequently asked questions to address common questions on sustainability assurance and help practitioners navigate the AASB’s non-authoritative guidance.

Canadian practitioners are encouraged to follow the progress of this initiative and provide feedback, as necessary.

Staff Contact(s)

Amalia Spensieri, CPA, CA Principal, Auditing and Assurance Standards Board

Johanna Field, CPA, CA Associate Director, Auditing and Assurance Standards Board

Project Status

  • Information gathering

    Identified Canadian implications related to sustainability assurance standard-setting

  • Approving project

    IAASB project proposal approved in September 2022

    AASB project proposal approved in January 2023

  • Consulting stakeholders

    The IAASB issued its Exposure Draft – ISSA 5000, General Requirements for Sustainability Assurance Engagements in August 2023

    The AASB issued its Exposure Draft – CSSA 5000, General Requirements for Sustainability Assurance Engagements in September 2023

  • Deliberating feedback

    The AASB is deliberating feedback on its Exposure Draft – CSSA 5000

  • Final pronouncement

What We Heard and Next Steps for the Canadian Standard on Sustainability Assurance (CSSA) 5000

Thank you for your response to our Exposure Draft! As we review the results of our consultation, we invite you to read more about main feedback themes, who we heard from, and what’s next.

On-demand Webinar – AASB Exposure Draft, “CSSA 5000, General Requirements for Sustainability Assurance Engagements”

As we deliberate on the feedback received, watch our educational webinar to learn about the proposed Exposure Draft.

News


January 26, 2024

News, Resource, Article

What We Heard and Next Steps for the Canadian Standard on Sustainability Assurance (CSSA) 5000

Thank you for your response to the AASB’s Exposure Draft, “Proposed Canadian Standard on Sustainability Assurance (CSSA) 5000, General Requirements for Sustainability Assurance Engagements.” We are now reviewing the feedback we received as we work towards the approval of the new CSSA 5000. Read more about the results of our consultation, including main feedback themes, who we heard from, and what’s next.

October 5, 2023

News

Survey: AASB Exposure Draft, “CSSA 5000, General Requirements for Sustainability Assurance Engagements”

The AASB is seeking input on the CSSA 5000 Exposure Draft from all interested and affected parties, especially those who perform assurance engagements over sustainability information, preparers of sustainability disclosures, and other users of the assurance report. Respond to our short surveys today!

September 25-28, 2023

Resource, Webinar

On-demand Webinar – AASB Exposure Draft, “CSSA 5000, General Requirements for Sustainability Assurance Engagements"

Interested in learning more about Exposure Draft, “CSSA 5000, General Requirements for Sustainability Assurance Engagements”? Watch our recorded webinar for more information.

July 12, 2023

International Activity, News

IAASB approves proposed ISSA 5000, General Requirements for Sustainability Assurance Engagements for public consultation

The International Auditing and Assurance Standards Board unanimously approved the draft International Standard on Sustainability Assurance (ISSA) 5000, General Requirements for Sustainability Assurance Engagements, for public consultation. The consultation will be open from early August until early December 2023. Read more details on the proposed ISSA. 

May 16, 2023

News

IAASB Advances Timeline for Consultation for Sustainability Assurance

At its April meeting, the IAASB confirmed its intention to advance the consultation on its proposed new standard for sustainability assurance, International Standard on Sustainability Assurance (ISSA) 5000, General Requirements for Sustainability Assurance Engagements. Subject to the expected IAASB approval of the exposure draft in June, stakeholders can now expect the public consultation on the proposed standard to open in the latter part of July or early August 2023 and extend into December 2023. The AASB will be coordinating our exposure period to overlap with the IAASB’s exposure draft period.

May 16, 2023

News

The AASB’s Sustainability Assurance Committee is Established

In response to the IAASB’s approval of the project proposal for the development of an overarching sustainability assurance standard, ISSA 5000, the AASB has established the Sustainability Assurance Committee to enhance its technical expertise in this area and support the Board’s sustainability assurance projects. Learn more about the Committee. 

November 15, 2022

News

Volunteer Opportunity – Recruiting Members for the AASB’s Sustainability Assurance Committee

With the IAASB’s approval of the project proposal for the development of an overarching sustainability assurance standard, ISSA 5000, the AASB is enhancing its technical expertise in this area through a Sustainability Assurance Committee. Help us address the issues and challenges related to providing assurance over sustainability information and apply by February 21, 2023.

Meeting & event summaries


April 8, 2024

AASB Decision Summary – March 11-12, 2024

The AASB discussed the IAASB’s proposed revisions to International Standard on Sustainability Assurance (ISSA) 5000, General Requirements for Sustainability Assurance Engagements. Key issues discussed included proposed changes to the requirements and application material on:

  • the quality management standards that are “at least as demanding” as ISQM 1, Quality Management for Firms that Perform Audits or Reviews of Financial Statements, or Other Assurance or Related Services Engagements;
  • the understanding of “the entity’s process to identify the sustainability information to be reported”;
  • the practitioner’s consideration of materiality for qualitative disclosures;
  • using the work of another practitioner;
  • performing substantive procedures for disclosures irrespective of risk; and
  • the risk identification and assessment in a limited assurance engagement.

The AASB also reviewed feedback on the proposed and potential Canadian amendments in the Exposure Draft of Canadian Standard on Sustainability Assurance (CSSA) 5000, General Requirements for Sustainability Assurance Engagements.

The AASB will continue to discuss international and Canadian issues as it works toward a planned approval of CSSA 5000 by the end of the year.

December 14, 2023

AASB Decision Summary – November 17, 2023

The AASB reviewed a summary of outreach activities conducted and feedback received to date on the Exposure Draft, “General Requirements for Sustainability Assurance Engagements,” and discussed its response to the International Auditing and Assurance Standards Board’s (IAASB) Exposure Draft, “Proposed International Standard on Sustainability Assurance (ISSA) 5000, General Requirements for Sustainability Assurance Engagements.” Key issues discussed included:

  • estimates and forward-looking information;
  • group engagements; and
  • the assurance report, including:
    • disclosing a summary of the work performed for reasonable assurance in the assurance report; and
    • the requirement to disclose the engagement leader’s name.

The response letter to the IAASB was submitted by the comment deadline of December 1, 2023.

September 28, 2023

AASB Decision Summary – August 30, 2023

The AASB approved the Exposure Draft for a new Canadian Standard on Sustainability Assurance (CSSA) 5000, General Requirements for Sustainability Assurance Engagements. Key issues discussed included the following:

  • the significant changes to the proposed ISSA 5000 from the version last discussed by the Board at its June 2023 meeting;
  • the proposed Canadian amendments to ISSA 5000 and potential additional Canadian amendments; and
  • the questions to include in the Canadian Highlights Summary.

The Exposure Draft for CSSA 5000 was issued on September 21, 2023.

Comments to the AASB on its Exposure Draft are due as follows:

  • responses to general questions are due by November 6, 2023, to ensure the AASB receives timely feedback from Canadians on issues relevant to the AASB’s response to the IAASB; and
  • responses to all other questions are due by December 31, 2023.

Comments to the IAASB on its questions are due on December 1, 2023.

June 29, 2023

AASB Decision Summary – June 12-13, 2023

The AASB discussed issues related to the IAASB’s project to develop International Standard on Sustainability Assurance (ISSA) 5000, General Requirements for Sustainability Assurance Engagements. Key issues discussed included:

  • the full proposed ISSA 5000, including illustrative assurance reports and the proposed conforming and consequential amendments arising from ISSA 5000;
  • how the IAASB Task Force addressed substantive matters related to proposed ISSA 5000, including:
    • the concepts of sustainability matters, sustainability information, and disclosures and their interoperability within the standard;
    • the concepts of “double materiality”, more than one materiality for the same assurance engagement, and differentiating the concept of materiality applied by the entity (e.g., materiality process), and the practitioner’s consideration or determination of materiality (engagement materiality);
    • the convention for the effective date of proposed ISSA 5000; and
    • the relevant matters for the Explanatory Memorandum to accompany the exposure draft of the proposed ISSA 5000.
  • the Canadian issues pertaining to the exposure draft of the proposed Canadian Standard on Sustainability Assurance, such as:
    • the exposure period;
    • any possible Canadian amendments;
    • any questions to include in the Canadian Exposure Draft; and
    • the planned outreach with interested and affected parties.

The IAASB expects to approve an exposure draft at its June 2023 meeting. The AASB expects to approve its Canadian exposure draft in August 2023 with publication expected throughout September 2023.




June 7, 2023

AASB Decision Summary – May 25, 2023

The AASB held an education session on Sustainability Assurance and received two presentations from external presenters:

  • “Sustainability Assurance Challenges”, by Edward Olson, ESG Leader, MNP.
  • “Sustainability Reporting Landscape and Readiness for Assurance”, by Naomi Thomas, ESG Senior Manager, PWC.

The AASB also reviewed and discussed example sustainability reports and assurance reports. The discussion provided background knowledge to support the development of its proposed sustainability assurance standard which the AASB is planning to approve for exposure in August 2023 and issue shortly thereafter.

April 4, 2023

AASB Decision Summary – March 13-14, 2023

The AASB discussed issues related to the IAASB’s project to develop International Standard on Sustainability Assurance (ISSA) 5000, General Requirements for Sustainability Assurance Engagements. Key issues discussed included:

  • the work performed by other practitioners related to the sustainability assurance engagement;
  • the preconditions for the acceptance of the engagement including the suitability of criteria and meaningful level of assurance;
  • the materiality considerations including qualitative considerations, performance materiality, and aggregation risk;
  • the risks of material misstatement, the response to risks, and the difference between limited and reasonable assurance;
  • other information; and
  • the assurance report.

January 23, 2023

AASB Decision Summary – January 23, 2023

The AASB reviewed and unanimously approved a Canadian Project Proposal for a sustainability assurance standard, adopted concurrently from the International Standard on Sustainability Assurance (ISSA) 5000, General Requirements for Sustainability Assurance Engagements, as an Other Canadian Standard. Key issues included:

  • the project’s scope, public interest considerations, and risk assessment;
  • the limited circumstance where the AASB can make amendments to the international standard (i.e., the amendment criteria);
  • the relationship of the proposed Canadian Standard on Sustainability Assurance (CSSA) 5000 with other Canadian standards;
  • the Board’s influence in drafting the international standard; and
  • the project’s timeline, resources, and communications plan.

December 13, 2022

AASB Decision Summary – November 28-29, 2022

The AASB discussed issues related to the IAASB’s project. Key issues included:

  • how the practitioner should group sustainability information for purposes of materiality, risk assessment, and evaluating misstatements;
  • the practitioner’s conclusion in the sustainability assurance report (e.g., a single conclusion for all sustainability information being assured, or multiple conclusions for different topics or indicators disclosed in the sustainability information); and
  • the differences in the approach between limited and reasonable sustainability assurance engagements for risk assessment.

The AASB also discussed the Canadian next steps for sustainability assurance. The Board made a directional decision to adopt the IAASB’s proposed overarching standard as an Other Canadian Standard concurrently with the IAASB. In accordance with the AASB’s Due Process Manual, a project proposal will be presented at the AASB’s January 2023 meeting.

November 15, 2022

AASB Decision Summary – October 25, 2022

The AASB discussed establishing a Sustainability Assurance Committee to inform the Board’s work to support sustainability assurance.

Key issues included:

  • whether a committee was needed and whether a standing committee is an appropriate structure;
  • the Committee’s responsibilities, including:
    • exploring Canadian-specific issues related to sustainability assurance;
    • providing feedback on IAASB agenda materials;
    • supporting the AASB on future Canadian sustainability assurance standard setting; and
    • collaborating with the AcSB, PSAB, and the CSSB;
  • the Committee members’ expertise;
  • the desired composition of the Committee of primarily sustainability assurance providers (i.e., professional accountants and other professionals); and
  • a minimum three-year term of appointment, with an option to renew.

A public call for volunteers for this new Committee will be issued on the AASB’s website in mid-November.

October 4, 2022

AASB Decision Summary – September 8-9 2022

The AASB discussed issues related to the IAASB’s project for developing an overarching standard for assurance on sustainability reporting, and issues related to its development. Key issues included:

  • the content of the project proposal;
  • the structure for an overarching standard for assurance on sustainability reporting;
  • the initial proposals regarding the defined terms for the overarching standard; and
  • the approach to developing the requirements for the overarching standard.

The IAASB expects to approve a standard-setting project proposal at its September 2022 meeting.

At its next meeting, the AASB will discuss IAASB issues and next steps for Canadian sustainability assurance standard setting.

August 31, 2022

AASB Decision Summary – June 6-7, 2022

The AASB discussed issues related to the IAASB’s approach to developing a standard for assurance on environmental, social and governance (ESG)/sustainability reporting. The IAASB proposed a phased approach to standard setting that includes:

  • an immediate standard-setting action on an overarching ESG/sustainability assurance standard that addresses the conduct of an assurance engagement in its entirety and that leverages in its development existing sustainability/Extended External Reporting standards and guidance, as well as material from the ISAs; and
  • future standard-setting actions on specific aspects of ESG/sustainability assurance, types of information (e.g., scenario analysis, forward-looking information), and the integration of ESG/sustainability information in the financial statements.

Key issues discussed included:

  • whether the AASB supports the development of an overarching standard on ESG/sustainability assurance as an immediate standard-setting action;
  • how to design and frame the overarching standard, including its relationship with International Standard on Assurance Engagements (ISAE) 3000 (Revised), Assurance Engagements Other than Audits or Reviews of Historical Financial Information. The IAASB proposed three options: green-field approach, stand-alone approach, or ISAE 3000+ approach; and
  • the critical areas in engagement performance that present challenges to practitioners that the IAASB plans to address as part of the immediate standard-setting action.

The IAASB expects to present an outline of the requirements for an overarching ESG/sustainability assurance standard at its meeting in September 2022.

August 31, 2022

AASB Decision Summary – March 7-8, 2022

The AASB provided input to the IAASB members from Canada on issues related to the IAASB’s research on sustainability/ESG assurance. Key issues discussed included:

  • scope of the IAASB’s actions on sustainability/ESG reporting;
  • challenges in performing assurance on sustainability/ESG reporting, including urgency and priority; and
  • actions the IAASB should take in addressing assurance on sustainability/ESG reporting.

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.