Audit assertions for expenses are the specific claims management makes about every expense recorded in the financial statements, and auditors test each one with different procedures. Six assertions apply to expense transactions: occurrence, completeness, accuracy, cutoff, classification, and presentation. Each targets a distinct way expenses can be misstated, which is why an audit of the expense population is never a single test but a set of related ones.
Expenses fall into what auditing standards call “classes of transactions and events” because they result from activity over a reporting period rather than sitting as a balance at a point in time. The risks are period-based: an expense might never have happened, might belong in a different year, might be in the wrong account, or might be missing entirely. The six assertions map onto those failure points one by one.
Occurrence: Did the Expense Actually Happen?
Occurrence is management’s claim that every recorded expense reflects a real transaction belonging to the company during the period. The risk is overstatement through fictitious or inflated expenses, and it rises when management has reason to reduce taxable income or when vendor-setup controls are loose enough to let someone route payments to a fake supplier.
Testing runs from the books outward. Auditors pull a sample of recorded expenses from the general ledger and trace each entry back to its supporting documents: the approved vendor invoice, the purchase order, a receiving report showing the goods arrived, and evidence of payment. The paper trail has to confirm that the company received something of value, that a real vendor provided it, and that the charge belongs to the entity being audited. This direction of testing, called vouching, is the signature procedure for occurrence. Starting from source documents and working forward into the ledger tests a different assertion.
Completeness: Are Any Expenses Missing?
Completeness is the mirror image. Management is claiming that every expense that should have been recorded actually was. The risk is understatement, which makes net income look better than it should. Omitting expenses is one of the more direct ways to inflate earnings, so this assertion gets heavy attention when a company is under pressure to hit targets.
The primary procedure is the search for unrecorded liabilities, and it appears in almost every audit. The auditor works in the opposite direction from occurrence testing, starting from external evidence that an expense might exist and tracing forward to see whether it made the books.
In practice, this means looking at large vendor payments made in the first month or two after year-end. If a company paid a vendor $200,000 in January, the auditor checks the invoice date and receiving report to see whether the goods or services were actually received before December 31. If they were, the expense belongs in the prior year and should have been accrued. Auditors also compare current-year accruals for recurring items like payroll, utilities, and warranty claims against prior amounts and contractual terms, watching for numbers that look suspiciously low. Board minutes and legal correspondence can surface commitments or litigation that should have triggered an accrual and didn’t.
A lot of adjusting entries originate here. Some of the missing expenses fell through the cracks because an invoice arrived late. Some didn’t.
Accuracy: Are the Amounts Right?
Accuracy is the claim that recorded expense amounts are mathematically correct and properly calculated. A transaction can be real, in the right period, and in the right account, but still carry the wrong number. Errors in allocation, computation, and currency conversion all sit here.
Auditors test accuracy through recalculation. For depreciation, they independently recompute the charge using the company’s stated method, useful life, and salvage value, then compare the result to the recorded amount. For foreign-currency expenses, they verify that the correct exchange rate was applied. Allocated costs like shared overhead or insurance get checked to confirm the formula was applied consistently and the inputs were correct. The recorded amount also has to match the invoice or contract behind it. A transposition that turns $15,300 into $13,500 is an accuracy failure even when the underlying transaction is legitimate.
Cutoff: Right Accounting Period?
Cutoff is management’s claim that every expense landed in the correct fiscal year. The risk is period manipulation: shifting a legitimate expense across the year-end line to move results between periods. A company wanting to boost current earnings might push a December expense into January. One trying to reduce next year’s tax burden might pull a January expense into December.
Testing concentrates on the days immediately surrounding year-end. Auditors examine the last several receiving reports before year-end and trace the corresponding invoices to confirm they were recorded in the current period’s payables. Then they cross the line and look at the first invoices and disbursements booked in the new period to verify the underlying goods or services weren’t actually received before the cutoff date. When an expense is recorded in the wrong period, both years’ income statements are distorted: one overstated, one understated.
Classification: Right Account?
Classification is the claim that each expense was recorded in the correct general ledger account. A misclassified expense may not change total net income, but it distorts individual line items in ways that mislead anyone analyzing the statements. It can also create real tax problems.
The highest-stakes classification question in expense auditing is whether a cost should be expensed immediately or capitalized as an asset. Federal tax law draws a hard line. Under the Internal Revenue Code, ordinary and necessary business expenses, including routine repairs and maintenance, are deductible in the year they’re incurred.1Office of the Law Revision Counsel. 26 U.S. Code 162 – Trade or Business Expenses Amounts paid for permanent improvements or betterments that increase a property’s value must be capitalized, added to the asset’s basis, and depreciated over time.2Office of the Law Revision Counsel. 26 U.S. Code 263 – Capital Expenditures The IRS tangible property regulations provide a framework for making the call, which has long been one of the trickier judgments in tax accounting.3Internal Revenue Service. Tangible Property Final Regulations
Wrongly expensing a $500,000 building improvement as a repair wipes that amount off current-year income in a single hit instead of spreading it across decades of depreciation. The income statement, the balance sheet, and the tax return are all wrong at once. Auditors test classification by reviewing the nature of significant expenditures, reading invoices and work orders for language suggesting improvement rather than maintenance, and checking individual transactions against the company’s capitalization policy.
Presentation: Properly Shown and Disclosed?
Presentation is the assertion that expenses are appropriately grouped, labeled, and disclosed in the statements and notes. A company could record every expense accurately, in the right account and the right period, and still violate this assertion by burying a material item inside an unrelated line or failing to break out a significant cost that investors would want to see.
Testing evaluates whether totals are aggregated or disaggregated at the right level. Employee compensation, for example, should typically be broken out in the notes to show wages, pension costs, and payroll taxes as separate components. Unusual or nonrecurring items need to be identified clearly rather than blended into operating costs where they would distort trend analysis. Presentation also covers the adequacy of footnote disclosures, particularly for contingent liabilities. When a company faces pending litigation or other loss contingencies, accounting standards require disclosure of the nature of the contingency and either an estimate of the possible loss or a statement explaining why no estimate can be made.
Related-Party Expenses Cut Across Every Assertion
Expenses involving related parties, meaning transactions with insiders, affiliated entities, or family members of executives, carry elevated risk across nearly every assertion at once. A company might overpay a consulting firm owned by the CEO’s spouse (accuracy and occurrence), fail to disclose the relationship (presentation), or bury the payments in generic operating accounts (classification). These transactions don’t arise from arm’s-length negotiation, so the usual market-based reasonableness checks are weaker.
PCAOB standards require auditors to understand the company’s process for identifying related parties and authorizing transactions with them.4Public Company Accounting Oversight Board. AS 2410 Related Parties For each related-party transaction that requires disclosure, the auditor examines the underlying documentation, evaluates whether the stated business purpose makes sense, and determines whether the transaction was properly authorized under the company’s own policies. Board minutes get read for evidence of related-party dealings that management didn’t flag.
How Materiality Governs the Response
Not every failed assertion becomes an audit adjustment. Auditors evaluate each finding against a materiality threshold: a dollar amount below which a misstatement is unlikely to change the decisions of someone reading the statements. An unrecorded $800 utility bill at a company with $50 million in expenses won’t move anyone’s analysis. An unrecorded $2 million vendor liability might.
The FASB’s conceptual framework defines information as material if omitting or misstating it could influence the decisions users make based on the financial report, and deliberately avoids setting a uniform numerical threshold.5Financial Accounting Standards Board. Conceptual Framework for Financial Reporting Chapter 3 – Qualitative Characteristics of Useful Financial Information Materiality is always entity-specific. A $100,000 misstatement could be immaterial for a large public company and devastating for a small manufacturer. Dollar size isn’t the whole answer either. A small misstatement that masks a related-party transaction or a regulatory violation can be material regardless of the amount, because it changes the story the statements tell. Auditors often set a quantitative planning threshold as a percentage of revenue, net income, or total assets and then apply qualitative judgment on top. Individual misstatements below the threshold still get aggregated, because ten small errors pushing the same direction can add up to something material.