A lender bases a credit decision on $4.0 million of net income. The auditor knows there is a $120,000 misstatement. Would correcting it change the lender's decision? That is the question AU-C 320 asks you to answer before fieldwork starts.
HIGH-FREQUENCY: AU-C 320 defines materiality at the financial statement level as the magnitude of a misstatement that, individually or in aggregate, could reasonably be expected to influence the economic decisions of users taken on the basis of the financial statements. Set during planning, before fieldwork, to scope the engagement.
The standard gives you a concept, not a formula ("what would change a user's decision") and asks you to translate it using judgment, qualitative considerations, and the needs of likely users.
KEY: Materiality is set from the user's perspective. Lenders care about debt-service coverage; equity investors care about earnings per share (EPS); regulators care about capital ratios. The amount must fit the dominant user's lens.
Select a benchmark (a financial statement metric), then apply a percentage range. The benchmark should be a number that drives user decisions for that entity.
Common mistakes
- Defaulting to 5% of pretax income for any entity. Trap: 5% of zero income = $0 materiality, or 5% of a one-time gain produces an inflated number. Switch when the entity does not fit the stable-for-profit profile: government means expenditures, asset-heavy means assets, breakeven means revenue.
- Ignoring qualitative triggers when the amount is small. A $25,000 misstatement on $8,000,000 income is 0.3%. Trap: the candidate stops there. The exam answer often hinges on a covenant near its trigger, fraud, or a profit-to-loss flip.
- Applying 1% to revenue when income works. Trap: 1% of $50M revenue = $500,000 vs 5% of $4M pretax income = $200,000, so using revenue under-scopes the audit.
Bottom line
- AU-C 320 sets financial-statement materiality as the threshold above which misstatements could influence a reasonable user's economic decisions, fixed during planning
- Quantitative benchmarks: 5-10% of pretax income from continuing operations, 0.5-1% of total revenue or assets, ~1% of total equity, 0.5-1% of total expenditures for governments
- Benchmark choice depends on users: public for-profits use pretax income, asset-intensive entities use total assets, governments use expenditures
- Qualitative factors can make a quantitatively immaterial misstatement material: covenant triggers, fraud, profit-to-loss swings, regulatory thresholds
Exam shortcut
When the exam describes an entity, eliminate benchmarks before selecting one: zero or negative income kills pretax income, government means total expenditures, asset-heavy means total assets, equity-driven funds means total equity. Then check for qualitative triggers: covenants near limits, fraud, profit-to-loss flips, regulatory thresholds. The trap answer is usually "below 5% so immaterial" when a qualitative factor controls.
The full lesson (about 4,332 words, 29 min read) adds 10 worked examples, all 6 common mistakes, a self-check, free in the app.
Learning objectives
- II.D1
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