Glossary›Assurance, audit evidence and working papers›Self-review threat
Glossary term
Cluster A · A9
Tier 1 · differentiator
Self-review threat
Definition
A self-review threat arises when a firm has to evaluate its own prior work. If the firm that assures your climate disclosures also built your emissions model or drafted your disclosures, it is reviewing itself. Under APES 110 this threat cannot be reduced to an acceptable level for a public interest entity, so the service is prohibited.
On this page
In practice
The self-review threat is the specific mechanism behind the preparer and assurer split, and it is worth understanding precisely, because the boundary is not where most people assume.
The threat is created by the firm doing work that will later form part of the subject matter it assures. Building your emissions calculation model creates it. Selecting your emission factors creates it. Drafting the disclosure text creates it. Making the boundary determination creates it. What does not create it is advice, training, methodology explanation and answering technical questions, provided management makes the decisions and owns the output.
For a public interest entity, APES 110 does not permit the firm to apply safeguards and proceed. The prohibition on providing a non-assurance service that might create a self-review threat is absolute.
APES 110’s public interest entity definition was expanded for sustainability engagements, and whether a given captured entity meets it decides how strictly the independence provisions bite. Confirm the entity’s PIE status with the practitioner before assuming either way; the answer changes what the audit firm may and may not do for you.
What the assurer does with it
At engagement acceptance the firm maps every service provided to the entity by the firm and its network against the prohibition. Where it finds a problem, the options are that the firm withdraws the non-assurance service, the entity appoints a different assurer, or the preparation is done by an independent party. That is the conversation that produces the referral.
Commonly confused with
Self-interest threat, which is about financial dependence on the client, and familiarity threat, which is about long association. All three are named in APES 110; only self-review is engaged by preparation work.
Sources
1
APES 110 Code of Ethics for Professional Accountants (including Independence Standards)
APESB
2
Review status
Review required
Last reviewed
15 September 2026
Editorial pass, unsigned
Reviewer required
Registered company auditor with APES 110 expertise
Next scheduled review
1 July 2027
Part of
Cluster A, Assurance, audit evidence and working papers
47 terms on what an assurance provider tests, what they accept as evidence, and what a preparer has to be able to produce.
Related terms
The broader principle this threat sits inside
The code that makes the prohibition absolute for a public interest entity
The workable arrangements this threat leaves you
Related questions
What is the self-review threat and why does it apply to us?
−
A self-review threat arises when a firm has to evaluate its own earlier work. If the firm that built your emissions inventory then gives an assurance conclusion on it, it is checking itself. APES 110 treats that as a threat safeguards generally cannot fix for a public interest entity.
Can our auditor prepare our climate report?
+
Usually not, and it turns on whether they will also assure it. Preparing a disclosure you later assure is a self-review threat under APES 110, and for a public interest entity that threat cannot be reduced to an acceptable level, so the service is prohibited. Other entities need a case-by-case assessment.
Our auditor said they cannot do this. Who should we use instead?
+
Because your auditor cannot prepare a disclosure they will later assure, the work goes to someone independent of them. Your realistic options are another audit firm outside your auditor’s network, a specialist disclosure preparer, or an in-house build. Independence from your assurance provider is the binding constraint, not size or brand.
Where this sits commercially
Carbonhalo prepares; it never assures.
Other terms in this cluster
Self-review threat