Assurance Reporting: Principles and Practice
Guidance on preparing and presenting internal audit assurance reports aligned with the IIA Standards.
Reporting principles
- Convince with evidence. Conclusions rest on sufficient, reliable evidence.
- Focus on risk and control, not activity. Report what matters to objectives.
- Be balanced. Report both strengths and deficiencies.
- Be actionable. Each finding includes a recommendation, an owner and a target date.
- Be timely. Reporting soon after fieldwork preserves value.
Report structure
- Objective and scope
- Overall opinion — a clear assurance rating
- Key findings — condition, criteria, cause, effect, recommendation
- Management response — agreed actions and dates
- Appendices — methodology and limitations
Communicating to the board
- Lead with the assurance opinion
- Highlight risks not addressed
- Track open recommendations across reporting cycles
- Avoid technical jargon that obscures the message
An assurance report's value is measured by the action it prompts.