How Judgment Sampling Works
The process starts by defining the population and the specific audit or review objective. The reviewer then evaluates characteristics such as transaction value, unusual activity, account movements, prior findings, control exceptions, and management estimates. Based on these factors, selected items receive detailed examination.
For example, an auditor reviewing expense transactions may deliberately select unusually large payments, transactions recorded near period-end, manual journal entries, or items involving unusual vendors. The selected transactions can then be traced to invoices, approvals, contracts, payment records, and accounting entries.
The selection rationale should be documented so another reviewer can understand why particular items were included and how the sample relates to the assessment objective.
Key Selection Criteria
Professional judgment is most useful when selection criteria are explicit rather than informal. A reviewer may combine several factors to identify transactions that warrant closer attention.
- Materiality: Select high-value transactions that could materially affect reported financial results.
- Risk: Focus on accounts or transactions associated with elevated financial or control risk.
- Unusual characteristics: Examine transactions that differ from normal patterns or business activity.
- Timing: Review transactions around period-end, reporting dates, or significant business events.
- Management judgment: Include estimates, provisions, valuations, and other areas requiring significant professional assessment.
Judgment Sampling vs. Other Sampling Methods
Judgment sampling differs from random sampling because the reviewer intentionally chooses items based on their characteristics. Random or statistical approaches can provide a broader basis for population-level conclusions, while judgment sampling is particularly useful when the review objective is to investigate specific risks or obtain evidence about selected items.
Expense Sampling is a related review approach in which expense transactions are selected for examination. Judgment sampling can be applied within expense reviews when auditors prioritize unusually large expenses, unusual vendors, manual entries, or transactions with specific risk indicators.
The appropriate method depends on the audit objective, population characteristics, required evidence, materiality, and applicable professional standards.
Accounting and Transaction Testing
Judgment sampling is frequently used to examine transaction processing controls and accounting accuracy. For example, an auditor may select invoices that require closer inspection and evaluate capture, extraction, validation, matching, gl coding, approval, and posting to determine whether the transaction was processed accurately.
Selection can also focus on transactions that are more likely to reveal differences between documented procedures and actual accounting activity. The findings from selected items should be documented carefully, including the source evidence reviewed and the reason the transaction was considered relevant.
Role of Technology and Professional Judgment
Modern finance systems can provide information that helps reviewers identify unusual transactions and refine their sampling decisions. AI architecture and finance AI agents can use large volumes of transaction information to surface patterns, while machine learning can support technology-led finance transformation by identifying characteristics that may warrant human review.
Technology-generated indicators do not replace the reviewer's responsibility to determine whether a transaction is relevant to the audit objective. Professional judgment remains important when interpreting business context, accounting requirements, materiality, and the significance of identified patterns.
Accounting Judgment and Documentation
Judgment sampling is closely connected to Accounting Judgment because the reviewer must decide which evidence is most relevant to the question being examined. Areas involving estimates, valuation, provisions, revenue recognition, or unusual transactions may require particularly thoughtful selection.
Where significant judgments affect financial statements, the rationale for the selected items and the conclusions reached should be documented. Judgment Disclosures can provide additional context where financial reporting requires disclosure of significant judgments or estimation uncertainty.
Best Practices
A well-designed judgment sample should be purposeful, documented, and aligned with the audit objective. Reviewers should avoid selecting items solely because they are convenient to access or because they confirm an expected conclusion.
- Define the population: Establish exactly which transactions, balances, or records are available for selection.
- Document selection logic: Record the characteristics that caused each item to be selected.
- Consider multiple risk factors: Evaluate value, timing, unusual activity, controls, and management judgment together.
- Retain supporting evidence: Link each tested item to the documents and records reviewed.
- Evaluate findings in context: Consider whether observations indicate an isolated issue or a broader control or accounting pattern.
Summary
Judgment Sampling uses professional expertise to deliberately select transactions or records that are particularly relevant to an audit or financial review. By combining defined selection criteria, business knowledge, transaction evidence, and documented reasoning, it helps auditors focus testing on areas that matter most to financial reporting, internal controls, and audit conclusions.