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On integrated audits the auditor will test and report on the effectiveness of internal controls over
financial reporting as of the client’s year end. When the auditor is issuing an opinion on internal
control, the PCAOB has mandated that the external auditor must test operating effectiveness of
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On all audits, auditors must gain an understanding of the design of internal controls in order to
plan the audit. Requirements for testing the operating effectiveness of the controls vary
depending on whether the client is a larger public company or other type or organization.
a.
Larger publicly held companies:
Auditors of larger public companies must attest to the effectiveness of the client’s internal
controls over financial reporting as of the client’s year end. In performing an audit of internal
control, the auditor will:
• Assess the design effectiveness and implementation of controls
• Review the client’s testing of the operating effectiveness of controls as a basis for