ISA 810 (Revised) – Engagements to Report on Summary Financial Statements

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What Is ISA 810?

Companies routinely publish a condensed version of their financial statements; a summary annual report for shareholders, a snapshot for lenders, or a highlights page in an investor presentation. These summary financial statements are shorter and less detailed than the full audited set, and by themselves they don’t tell a reader whether they can be trusted.

ISA 810 (Revised) titled Engagements to Report on Summary Financial Statements issued by IAASB exists to close that gap. It sets out what an auditor must do before agreeing to report on a summary version of financial statements they’ve already audited, and how that report should be worded. The engagement is deliberately narrow: the auditor is not forming a fresh opinion on whether the summary presents a “true and fair view.” Instead, they’re reporting on whether the summary is a fair, consistent derivation of the audited financial statements it comes from.

That distinction matters. A reader who sees an auditor’s name attached to a summary report might reasonably assume it carries the same weight as a full audit opinion. ISA 810 is built, in large part, to prevent that misunderstanding.

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Objective of ISA 810

The standard frames the auditor’s job as three sequential objectives, and each one has to be satisfied before moving to the next:

1. Determine whether it is appropriate to accept or continue an engagement to report on summary financial statements.
2. Where the engagement is accepted, form an opinion on the summary financial statements, based on evaluating the conclusions drawn from the evidence obtained.
3. Express that opinion clearly, through a written report that also explains the basis for it.

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Definitions and Key Terms

ISA 810 rely on three defined terms throughout. Getting these straight makes the rest of the standard much easier to follow.

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Scope and Effective Date

ISA 810 (Revised) was updated to keep pace with the IAASB’s broader overhaul of auditor reporting. When ISA 700 (Revised) and the new ISA 701 introduced more transparent, informative audit reports including the reporting of Key Audit Matters, the IAASB revisited ISA 810 to make sure summary-statement reports reflected that same transparency.

• January 2015The IAASB issues its new and revised suite of auditor reporting standards, including ISA 700 (Revised) and ISA 701.
• August 2015Limited conforming amendments to ISA 810 are exposed for public comment.
• December 2015The IAASB approves ISA 810 (Revised).
• 15 December 2016ISA 810 (Revised) becomes effective, for engagements to report on summary financial statements for periods ending on or after this date.
• 1 April 2024India’s ICAI brings its equivalent, the revised SA 810, into effect for engagements beginning on or after this date, one example of how jurisdictions adopt and localise the standard.

Many national standard-setters, India’s ICAI and Hong Kong’s HKICPA among them, issue their own version of ISA 810 with local footnotes and guidance. The core requirements travel largely unchanged; the surrounding explanatory material is often tailored to the local market.

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When Does ISA 810 Apply?

ISA 810 engagements come up in a fairly predictable set of situations:

• A listed company wants to include condensed financial highlights in a shareholder-facing annual review, alongside or instead of the full statutory accounts.
• A group entity needs to submit summarised figures to a regulator, tax authority, or joint-venture partner that doesn’t require the full statement set.
• Management wants an auditor’s name attached to summary numbers used in an investor presentation, press release, or lending covenant pack.
• A parent company needs summarised subsidiary financials for consolidation reporting to a head office in another jurisdiction.

In every case, the common thread is the same: someone wants credibility attached to a shortened set of numbers, without commissioning an entirely separate audit or review.

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Engagement Acceptance and Requirements

Before agreeing to the engagement, the auditor works through a short checklist.

• Same auditor. The engagement is only available to the auditor who audited the underlying financial statements, not a different firm reviewing someone else’s audit.
• Acceptable criteria. The criteria management applied to build the summary must be acceptable in the circumstances, and adequately disclosed so a reader understands the basis of preparation.
• Access to the full report. The auditor needs to have access to or the reasonable expectation of obtaining the auditor’s report on the full financial statements.
• Nature of the underlying opinion. If the audit opinion on the full financial statements was qualified, adverse, disclaimed, or included an emphasis-of-matter or key audit matters, the auditor considers whether it’s still appropriate to accept the summary engagement, and how that will be reflected in the new report.

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Forming the Opinion & Auditor’s Report

Once accepted, the auditor’s procedures focus on whether the summary is consistent with the audited financial statements, not on re-testing the balances themselves. Broadly, that means checking that:

• The summary figures agree, or reconcile, to the corresponding figures in the audited financial statements.
• The applied criteria have been used consistently throughout the summary.
• The summary contains the information necessary and isn’t misleading in its level of aggregation or omission given the applied criteria.
• Any events or amendments after the date of the original auditor’s report that would affect the summary have been appropriately handled.

What the auditor’s report on the summary contains

An ISA 810 report follows a fairly fixed shape: a title identifying it as an independent auditor’s report, an addressee, an opinion paragraph stating whether the summary is consistent, in all material respects, with the audited financial statements (or fairly summarises them, depending on the applied criteria), a basis-for-opinion statement, a clear reference to the auditor’s report on the full financial statements and its date, and critically a statement making clear that the summary should be read alongside that full report and does not substitute for it.

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ISA 810 vs Related Auditing Standards

ISA 810 sits inside a family of standards that govern different aspects of auditor reporting.

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Common ISA 810 Issues and Challenges

• Implying a broader opinion than intended. Loose wording in a summary report can make readers think the auditor has re-audited the numbers, rather than simply checked consistency.
• Undisclosed criteria. If the basis for preparing the summary isn’t clearly disclosed alongside it, readers have no way to judge whether the condensation is reasonable.
• Timing mismatches. The summary engagement usually runs close to, or immediately after, the underlying audit leaving little room to properly consider subsequent events if the two aren’t sequenced carefully.
• Distribution without the full report. If management plans to circulate the summary without making the full auditor’s report available on request, the auditor needs to address that before signing off.
• Carrying forward a modified opinion. A qualification, key audit matter, or emphasis of matter in the original report has to be reflected, not just placed in the summary report.

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Frequently Asked Questions