Assurance Engagements - Completed

  • Assurance Engagements - Completed

    Project Status

    Project completed - December 2003

    Objective(s) of project

    Since ISAE 3000 (previously ISAE 100), Assurance Engagements was issued in June 2000, the IAASB literature has included basic principles and essential procedures for both the audit and review of historical financial information, and for what ISAE 3000 (previously ISAE 100) termed high level assurance engagements on subject matters other than historical financial information.

    However, IAASB literature did not establish basic principles and essential procedures for what ISAE 3000 (previously ISAE 100) termed moderate level assurance engagements. An objective of this project has been to establish basic principles and essential procedures for all assurance engagements.

    This project has resulted in the the issue of:

    The following documents will be withdrawn when ISAE 3000 (Revised) becomes effective:


    The Framework defines and describes the elements and objectives of an assurance engagement, and identifies engagements to which International Standards on Auditing (ISAs), International Standards on Review Engagements (ISREs) and International Standards on Assurance Engagements (ISAEs) apply. It provides a frame of reference for practitioners and others involved with assurance engagements, such as those engaging a practitioner and the intended users of an assurance report.

    ISAE 3000 (Revised) establishes basic principles and essential procedures for all assurance engagements other than audits or reviews of historical financial information covered by ISAs and ISREs, for example, assurance engagements regarding:

    • Environmental, social and sustainability reports;
    • Information systems, internal control, and corporate governance processes; and
    • Compliance with grant conditions, contracts and regulations.

    Topics dealt with in ISAE 3000 (Revised) include:

    • Ethical requirements;
    • Quality control;
    • Engagement acceptance;
    • Planning;
    • Using the work of an expert;
    • Obtaining evidence;
    • Documentation; and
    • Preparing the assurance report.


    The background to this project was explained in the Explanatory Memorandum to the exposure draft. Also, the following documents, as referred to in that Explanatory Memorandum can be downloaded here:

    • Determination and Communication of Levels of Assurance Other Than High
    • Report published with ISAE 100.


        Major issues were identified in the Explanatory Memorandum to the exposure draft.

        Next Steps

        • The implications of the Framework for the IFAC Code of Ethics for Professional Accountants are being discussed with the IFAC Ethics Committee.

        • While ISAE 3000 (Revised) has been written for general application, the IAASB expects to develop further ISAEs to provide detailed guidance on specific subject matters, and at future meetings will consider possible projects dealing with assurance on internal control and assurance on sustainability reports.

        • Recognizing that the provision of broader assurance services is an evolving field, the IAASB intends to keep the practical implementation of the Framework and ISAE 3000 (Revised) under review.

        Other Information

        The IAASB invites feedback from practitioners and others on their experience with applying the Framework and ISAE 3000 (Revised).

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