• Joint FAQs from IAASB and IESBA Staff support interoperability and consistent application of ISSA 5000 and IESSA
• IESBA Staff Q&As explain key aspects of IESSA to support effective implementation of the ethics and independence standards for sustainability assurance engagements
• Resources help stakeholders implement the new global sustainability standards with clarity and confidence

The Staffs of the International Auditing and Assurance Standards Board (IAASB) and the International Ethics Standards Board for Accountants (IESBA) today released two new publications to support implementation of the IAASB’s and IESBA’s global sustainability-related standards: the International Standard on Sustainability Assurance (ISSA) 5000 and the International Ethics Standards for Sustainability Assurance (IESSA).

Developed in close coordination and launched in January 2025, ISSA 5000 and IESSA provide a coordinated global assurance and ethics framework for sustainability assurance engagements. The new publications aim to highlight the interoperability of the two Boards’ standards and to assist practitioners in the consistent application of the standards.

Frequently Asked Questions (FAQs) on Sustainability Assurance Engagements

These FAQs issued jointly by IAASB and IESBA Staff address practical questions about applying ISSA 5000 and IESSA together. They address the following areas:

• Identifying relevant ethical requirements
• Determining group and value chain components
• Using the work of another practitioner
• Addressing IESSA disclosure requirements in the assurance report

IESBA Staff Q&As on IESSA

The IESBA Staff Questions and Answers publication focuses on ethics and independence considerations for practitioners performing sustainability assurance engagements.

Topics covered include:

• The scope of the ethics and independence standards in IESSA
• Independence considerations for group sustainability assurance engagements, including value chain components
• Independence considerations applicable to using the work of another practitioner
• Providing non-assurance services to a sustainability assurance client
• Effective date of the IESSA

The joint IAASB and IESBA Staff FAQs are available on both the IAASB and IESBA websites; the IESBA Staff Q&A publication is available on the IESBA website. For more information, visit www.ethicsandaudit.org/TrustInSustainability.

About IAASB and IESBA
The International Auditing and Assurance Standards Board^© and the International Ethics Standards Board for Accountants^© are part of the International Foundation for Ethics and Audit (IFEA) ^©, a nonprofit organization that supports high-quality, international ethics, audit, and assurance standards in the public interest. The IAASB and IESBA develop and issue their standards independently and in accordance with an approved due process and the Public Interest Framework, overseen by the Public Interest Oversight Board.

The IAASB develops auditing, assurance, related services, and quality management standards and guidance in the public interest that support consistent performance of quality engagements.

The IESBA is an independent global standard-setting board. The IESBA’s mission is to serve the public interest by setting high-quality, international ethics (including independence) standards as a cornerstone to ethical behavior in business and organizations, and to public trust in financial and non-financial information that is fundamental to the proper functioning and sustainability of organizations, financial markets and economies worldwide.

• Joint FAQs from IAASB and IESBA Staff support interoperability and consistent application of ISSA 5000 and IESSA
• IESBA Staff Q&As explain key aspects of IESSA to support effective implementation of the ethics and independence standards for sustainability assurance engagements
• Resources help stakeholders implement the new global sustainability standards with clarity and confidence

The Staffs of the International Auditing and Assurance Standards Board (IAASB) and the International Ethics Standards Board for Accountants (IESBA) today released two new publications to support implementation of the IAASB’s and IESBA’s global sustainability-related standards: the International Standard on Sustainability Assurance (ISSA) 5000 and the International Ethics Standards for Sustainability Assurance (IESSA).

Developed in close coordination and launched in January 2025, ISSA 5000 and IESSA provide a coordinated global assurance and ethics framework for sustainability assurance engagements. The new publications aim to highlight the interoperability of the two Boards’ standards and to assist practitioners in the consistent application of the standards.

Frequently Asked Questions (FAQs) on Sustainability Assurance Engagements

These FAQs issued jointly by IAASB and IESBA Staff address practical questions about applying ISSA 5000 and IESSA together. They address the following areas:

• Identifying relevant ethical requirements
• Determining group and value chain components
• Using the work of another practitioner
• Addressing IESSA disclosure requirements in the assurance report

IESBA Staff Q&As on IESSA

The IESBA Staff Questions and Answers publication focuses on ethics and independence considerations for practitioners performing sustainability assurance engagements.

Topics covered include:

• The scope of the ethics and independence standards in IESSA
• Independence considerations for group sustainability assurance engagements, including value chain components
• Independence considerations applicable to using the work of another practitioner
• Providing non-assurance services to a sustainability assurance client
• Effective date of the IESSA

The joint IAASB and IESBA Staff FAQs are available on both the IAASB and IESBA websites; the IESBA Staff Q&A publication is available on the IESBA website. For more information, visit www.ethicsandaudit.org/TrustInSustainability.

About IAASB and IESBA
The International Auditing and Assurance Standards Board^© and the International Ethics Standards Board for Accountants^© are part of the International Foundation for Ethics and Audit (IFEA) ^©, a nonprofit organization that supports high-quality, international ethics, audit, and assurance standards in the public interest. The IAASB and IESBA develop and issue their standards independently and in accordance with an approved due process and the Public Interest Framework, overseen by the Public Interest Oversight Board.

The IAASB develops auditing, assurance, related services, and quality management standards and guidance in the public interest that support consistent performance of quality engagements.

The IESBA is an independent global standard-setting board. The IESBA’s mission is to serve the public interest by setting high-quality, international ethics (including independence) standards as a cornerstone to ethical behavior in business and organizations, and to public trust in financial and non-financial information that is fundamental to the proper functioning and sustainability of organizations, financial markets and economies worldwide.

The IESBA Staff Questions and Answers publication focuses on ethics and independence considerations for practitioners performing sustainability assurance engagements.

Topics covered include: