Assurance needs a defined subject and criteria
An assurance engagement helps intended users assess information by providing an independent practitioner's conclusion against suitable criteria. Start by identifying what is being evaluated, which criteria apply and who will use the report.
Audit is one important form of assurance. The term assurance is broader and should not be treated as a promise that every aspect of a business has been verified.
Understand the assurance level
A financial-statement audit provides reasonable assurance, which is high but not absolute. A review provides limited assurance under the relevant engagement requirements. Some accounting services, including a compilation, provide no assurance at all.
The report's wording and scope matter. Do not describe financial information as audited merely because an accountant prepared it or an adviser reviewed a spreadsheet informally.
Agree the correct engagement
- The legal entity and reporting period.
- The subject matter and reporting criteria.
- Intended users and the reason for the report.
- Applicable legal or authority requirements.
- Practitioner eligibility, independence and other ethical considerations.
- Information responsibilities, timetable and deliverables.
Different recipients can require different work. Obtain the exact requirement before comparing fees or assuming that a lower-assurance engagement will be accepted.
Management's role remains essential
Management must provide complete records, explanations and relevant judgements. An independent practitioner does not replace the business's own controls or responsibility for the underlying information.
Prepare reconciled balances and preserve the evidence supporting significant transactions. Escalate missing documents and unusual events early so their implications can be considered within the engagement.
Read the conclusion in context
An assurance report is meaningful when read with its scope, criteria, conclusion and limitations. It is not a guarantee of future profit, solvency or detection of every fraud. A separate management letter can identify control matters without serving the same purpose as the assurance report.
Use the findings to assign actions and improve the records. Where another type of work is needed, such as a specific investigation or tax review, agree that scope separately rather than assuming the original report covers it.
Sources and further reading
Official references checked during the 24 October 2026 refresh. Application details and requirements can change; use the current source for the relevant entity and period.
