Materiality

Materiality is the threshold above which an omission or misstatement in the financial statements could reasonably be expected to influence the judgment of a reasonable user relying on those statements. It is the concept that makes auditing economically possible: without it, an auditor would need to verify every transaction rather than direct effort toward what actually matters to decision-makers.

Auditors set materiality at three levels. Overall materiality is established for the financial statements as a whole, typically as a percentage of a benchmark - profit before tax, revenue, total assets, or net assets - with the benchmark chosen to reflect what users of that particular entity care most about. A high-growth pre-profit company is usually benchmarked on revenue; a mature manufacturer on pre-tax income; an investment fund on net asset value. Performance materiality is set below overall materiality to allow aggregation room for undetected misstatements, commonly at 50 to 75 percent of the overall figure. The clearly trivial threshold, often around 5 percent of overall materiality, sets the floor below which misstatements need not be accumulated.

Materiality is not purely quantitative. A misstatement below the numerical threshold can still be material by nature - if it converts a loss to a profit, causes a debt covenant to be breached, affects management compensation, involves fraud or an illegal act, or relates to a related party transaction or a segment the market watches closely.

Materiality drives scoping decisions, sample sizes, the components included in a group audit, and ultimately whether identified misstatements require correction or can be passed. Revising it mid-engagement, which happens when actual results diverge from planning expectations, cascades through the entire audit plan.