How misstatements work in audit
ISA 200.13(i) defines misstatement broadly, covering factual errors, incorrect classification, missing disclosures, and application of non-compliant accounting policies. ISA 450.5 requires accumulating all misstatements except clearly trivial ones.
ISA 450.11 requires evaluating uncorrected misstatements individually and in aggregate. Prior period uncorrected misstatements carry forward and must be considered in the current year's evaluation.
Governed by: ISA 450 paragraph 4(a); ISA 200 paragraph 13(i)
Key Takeaways
- A misstatement can arise from error, fraud, incorrect application of accounting policies, or inadequate disclosure.
- The auditor's opinion addresses whether statements are free from material misstatement, not all misstatement.
- Individually immaterial misstatements must still be accumulated because their aggregate may be material.
- Uncorrected misstatements from the prior year carry forward and affect the current year's evaluation.
Worked example: Brennan Construction Ltd
Irish construction company, FY2024, revenue €48M, IFRS. Materiality €480K, performance materiality €340K, clearly trivial €17K.
Four misstatements found during testing:
- €62K duplicate invoice (factual misstatement)
- €95K warranty provision understatement (judgmental misstatement)
- €28K classification error — lease expense in wrong line (classification misstatement)
- €78K projected from sampling (projected misstatement)
Aggregate: €263K (55% of materiality), all in the same direction (overstate profit). The team requests correction of the factual and classification items and communicates the remainder to governance.
What reviewers get wrong
- Teams accumulate all types on the same schedule without distinguishing factual, judgmental, projected, and classification misstatements. ISA 450.A3 distinguishes between types.
- Prior-year uncorrected misstatements dropped from current year evaluation. ISA 450.A6 requires consideration of prior-period misstatements that still affect the current period.
Misstatement vs materiality
| Dimension | Misstatement | Materiality |
|---|---|---|
| What it is | Difference between reported and required | Threshold above which misstatement influences decisions |
| ISA reference | ISA 450.4(a), ISA 200.13(i) | ISA 320.2, ISA 320.10 |
| Set by whom | Identified by auditor during testing | Determined by auditor at planning |
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Frequently asked questions
Does the auditor need to find every misstatement?
No. The auditor's job is to determine whether uncorrected misstatements, individually or in aggregate, are material to the financial statements as a whole. Misstatements below the clearly trivial threshold need not be accumulated.
Do prior-year uncorrected misstatements affect the current year?
Yes. ISA 450.A6 requires the auditor to consider prior-period uncorrected misstatements that still affect the current period's financial statements in the current year's evaluation.