CPA Exam AUD: Substantive Procedures Complete Guide

Substantive Procedures: A Complete CPA Exam Review

Substantive procedures are audit procedures designed to detect material misstatements at the assertion level. Under AU-C Section 330, the auditor must design and perform substantive procedures for each material class of transactions, account balance, and disclosure, regardless of the assessed level of risk. Substantive procedures include tests of details and substantive analytical procedures.

Tests of Details

Tests of details involve examining individual transactions, account balances, or disclosures to determine whether they are materially misstated. These tests directly examine the amounts and disclosures in the financial statements. Common tests of details include vouching recorded amounts to supporting documentation (tests the occurrence/existence assertion), tracing source documents to recorded amounts (tests the completeness assertion), confirming balances with third parties (tests existence and rights/obligations assertions), physically inspecting assets (tests the existence assertion), and recalculating mathematical computations (tests the accuracy assertion).

The direction of testing matters significantly. Vouching (from the recorded amount back to the source document) primarily tests for overstatement. Tracing (from the source document to the recorded amount) primarily tests for understatement and completeness.

Substantive Analytical Procedures

Substantive analytical procedures involve evaluating financial information through analysis of plausible relationships among financial and nonfinancial data. When used as a substantive procedure (as opposed to during planning or the overall review), the auditor must develop an expectation of the recorded amount, determine the threshold for acceptable difference from the expectation, compare the expectation to the recorded amount, and investigate significant differences. The auditor must also evaluate the reliability of the data used to develop the expectation.

Substantive analytical procedures are most effective when the relationship between data is predictable and stable, the data used is reliable, and the expectation is precise. For example, comparing interest expense to average outstanding debt using a known interest rate is a strong substantive analytical procedure because the relationship is predictable. These procedures are generally not suitable as the sole substantive procedure for significant risks.

Designing Substantive Procedures by Assertion

The design of substantive procedures should be directly responsive to the specific assertions being tested:

• Existence/Occurrence: Confirmations, physical inspection, vouching recorded amounts to supporting documentation, and cutoff testing.
• Completeness: Tracing from source documents to recorded amounts, analytical procedures comparing account balances to expectations, search for unrecorded liabilities (examining cash disbursements after year-end).
• Accuracy/Valuation: Recalculation, reperformance of calculations, testing of estimates and allowances, price testing for inventory.
• Rights and Obligations: Inspecting legal documents such as deeds, contracts, and loan agreements, confirming terms with third parties.
• Cutoff: Examining transactions near year-end to verify they are recorded in the correct period, testing shipping documents around the balance sheet date.
• Classification: Reviewing the chart of accounts, examining transactions for proper account classification, testing that current and noncurrent items are properly classified.
• Presentation and Disclosure: Reading the financial statements and comparing disclosures to applicable requirements, reviewing the adequacy and completeness of disclosures.

Nature, Timing, and Extent of Substantive Procedures

The nature of substantive procedures refers to the type and combination of procedures used. More reliable procedures (such as confirmations from independent parties) are used when risk is higher. The timing of substantive procedures refers to when they are performed. Performing procedures at year-end rather than at an interim date provides more direct evidence. When substantive procedures are performed at an interim date, the auditor must perform additional procedures to extend the conclusions to year-end. The extent of substantive procedures refers to the quantity of testing, such as sample sizes. Higher assessed risk requires more extensive testing.

Substantive Procedures for Specific Accounts

Certain accounts have well-established substantive procedures. For accounts receivable, the primary procedure is confirmation of balances, supplemented by subsequent cash receipts testing and aging analysis. For inventory, the auditor observes physical inventory counts and performs test counts, tests pricing, and evaluates the need for lower-of-cost-or-net-realizable-value adjustments. For accounts payable, the primary completeness procedures include searching for unrecorded liabilities by examining subsequent disbursements and open invoices. For investments, the auditor confirms holdings with custodians and tests fair value measurements.

Dual-Purpose Tests

A dual-purpose test simultaneously serves as both a test of controls and a substantive test of details. For example, examining a sample of disbursements for proper authorization (control test) and for correct amounts (substantive test). Dual-purpose tests can improve audit efficiency but require separate evaluation of results for each purpose. A control deviation found during a dual-purpose test requires the auditor to consider the implication for the control risk assessment, which may require additional substantive testing.

Exam Tips for Substantive Procedures

• Substantive procedures are required for every material account regardless of the assessed level of control risk.
• Vouching tests overstatement (existence/occurrence); tracing tests understatement (completeness).
• Substantive analytical procedures alone are not sufficient for significant risks.
• Higher risk requires more reliable procedures, testing at year-end, and larger sample sizes.
• Direction of testing matters: match the procedure to the assertion.