Strengthening the Risk-Based Audit Framework: Proposed Revisions to ISA 330, ISA 500, and ISA 520

The IAASB is seeking feedback on proposed revisions to three core International Standards on Auditing (ISAs) that address audit evidence and auditors' responses to assessed risks—foundational aspects of every audit.

The proposals further embed a principles-based, risk-based audit framework while supporting rapid digital innovation in an evolving business, financial reporting, and technology environment.

Share your feedback by December 15, 2026.

Start Here: An Introduction with IAASB Vice-Chair Edo Kienhuis

Explore the Exposure Drafts

Ways to Provide Feedback

Respond to the Full Consultation

Stakeholders are invited to provide feedback on the full range of proposals using the Response Form.

User of Financial Statements? Share Your Views

The IAASB has developed a User Consultation Survey for investors, analysts, lenders and other users of audited financial statements. The survey provides a focused way to share your perspectives on selected aspects of the proposals without needing to address the full range of matters covered by the consultation.

Take the User Consultation Survey Here

Survey questions are available here in MS Word for planning purposes.

Both the Response Form and User Consultation Survey are open until December 15, 2026.

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The Proposed Revisions

These proposed revisions, when finalized, will complete an important phase of the IAASB's decade-long modernization of the International Standards on Auditing.

Building on recent revisions—including ISA 315 (Revised 2019)—the proposals further embed, clarify, and strengthen a principles-based, risk-based audit framework. They also address the increased use of technology in business, financial reporting, and auditing.

Establish a comprehensive basis for auditors' judgments about audit evidence

Strengthen auditors' responses to assessed risks

Reinforce professional skepticism and professional judgment throughout the audit

Support innovation while remaining principles-based rather than technology-specific

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Explore the Proposals and Engage With Us

Video Series: Explore Key Aspects of the Proposals

Our four-part video series takes a deeper look at key aspects of the proposed revisions to ISA 330, ISA 500 and ISA 520.

An Introductory Overview with Neil Morris, IAASB Member

Evaluating the Relevance and Reliability of Information with Edo Kienhuis, IAASB Vice-Chair

Reinforcing a Risk-Based Audit with Josephine Jackson, Project Advisor and Former IAASB Vice-Chair

How Technology Is Shaping the Proposed Revisions with Susan Jones, IAASB Technical Advisor

Global Webinar Series – Watch the Recordings

The IAASB's two-part global webinar series on the proposed revisions to ISA 330, ISA 500, and ISA 520 has concluded. Recordings of all four sessions and presentation slides are now available below.

Led by IAASB members and staff, the webinars provide an in-depth look at the proposals, including the key proposed changes and their implications for audit practice.

Part 1: Overview of the AE&RR Proposals and Reference Framework – Proposed ISA 500 (Revised)

This session explores the proposed revisions to ISA 500, including the updated framework for evaluating audit evidence.

First airing

Second airing

Part 2: Performance Aspects of the AE&RR Proposals – Proposed ISA 330 (Revised) and Proposed ISA 520 (Revised)

This session examines the proposed revisions to ISA 330 and ISA 520, focusing on how auditors design and perform procedures in response to assessed risks.

First airing

First airing

Webinar #1 Slides
Webinar #2 Slides
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Consultation Timeline

Key Dates and Activities

Resources and opportunities to engage will be added throughout the consultation period.

  1. August 5, 2026

    Consultation Launch

    Exposure Drafts, response form, introductory video, and stakeholder slide deck published.

    Download the Response Form

  2. August-December 2026

    User Consultation Survey

    A focused way for investors, analysts, lenders and other users of financial statements to provide feedback on selected aspects of the proposals. Survey questions are available in MS Word here.

    Take the User Consultation Survey Here

  3. August–September 2026

    Video Series

    Short videos exploring key aspects of the proposed revisions. Watch the first three videos above.

  4. September-October 2026

    Webinar Series

    Opportunities to hear from IAASB members and staff, explore the proposals, and ask questions.

    Watch the Recordings Above or Here in YouTube

  5. December 15, 2026

    Consultation Closes

    Submit your response to the IAASB by the closing date.

    Download the Response Form

"Over the past decade, the IAASB has modernized the International Standards on Auditing to strengthen audit quality and respond to an evolving environment. These proposals are an important milestone in that work. With the benefit of stakeholder input and when finalized, the revised standards will further enhance a principles-based, risk-based audit framework that provides a stable foundation for high-quality audits while remaining flexible enough to support innovation as technology continues to evolve."
—IAASB Chair Tom Seidenstein