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What is the difference between an audit, a review and a compilation of accounts?

An audit gives the highest level (reasonable) assurance and is the only one that meets the statutory audit requirement. A review gives limited assurance, and a compilation gives none, because the accountant only assembles the figures. Only a valid audit or a valid audit exemption satisfies the Companies Act.

Audit. Independent examination of the accounts and records, with testing, third-party evidence and a formal opinion on whether they give a true and fair view (section 266). It gives reasonable assurance, not absolute guarantee. Only an approved company auditor can sign it (sections 263-264).

Review. Mainly enquiries and analytical procedures. It results in a conclusion that nothing has come to the accountant's attention suggesting the accounts are materially misstated, which is limited assurance. It is less costly and less detailed than an audit.

Compilation. The accountant helps put the figures into financial statement form using information you supply. No assurance is given.

Which meets the law?

EngagementSatisfies s.248(2) / s.267 audit duty?
Audit by approved company auditorYes
ReviewNo
Compilation or management accountsNo
Unaudited accounts under audit exemptionNot an audit, but permitted if all conditions in PD 10/2024 are met

Audit-exempt companies lodge unaudited statements. A review or compilation may help improve quality or satisfy a bank, but it does not create the exemption, and the exemption does not depend on having one.

Choosing. Ask the bank, investor or tender body what level it wants. Never describe reviewed or compiled accounts as audited.

Review and compilation engagements are defined by professional standards, not by the Companies Act.

  • Companies Act 2016, ss.248(2), 263, 264, 266, 267

Sources

Applies to 2026 · Last reviewed 29 October 2026

General information for business owners, not legal, tax or professional advice. Rules change, so check the sources or ask a licensed professional before you act.

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    What is the difference between an audit, a review and a compilation of accounts? | OCTIS