An accounts payable audit is an independent review of a company’s accounts payable records. The Accounts payable audit is aimed at checking if the payments are accurate, properly authorized, and made on time, and if transactions are recorded properly. Companies consider experienced business process outsourcing (BPO) service providers or accounts payable audit firms for auditing accounts payable to maintain their AP processes.
When to Engage Accounts Payable Audit Firms
When Should Companies Work with Accounts Payable Audit Firms?
Organizations often partner with accounts payable audit firms when internal resources lack the expertise or time to conduct an independent AP review. External auditors are especially valuable when:
- AP volumes are high or rapidly growing
- There is a history of duplicate or late payments
- Compliance requirements are complex
- Businesses are preparing for financial audits or regulatory reviews
Experienced accounts payable audit firms provide objective insights and help organizations strengthen AP controls and efficiency.
Detailed Audit Steps
Key Steps in an Accounts Payable Audit
An effective accounts payable audit involves a series of detailed steps that help identify errors, inefficiencies, and compliance gaps within the AP process. Common audit steps include:
- Reviewing vendor master data for duplicates or inaccuracies
- Verifying invoice approvals against authorization policies
- Testing payment accuracy and timing
- Identifying duplicate or fraudulent payments
- Reviewing accruals and cut-off procedures\
- Ensuring proper documentation for all AP transactions
These steps help ensure that the accounts payable audit program delivers accurate insights and reliable findings.
Internal Controls Reviewed During an AP Audit
Accounts Payable Controls Reviewed During an Audit
A critical part of account payable auditing is evaluating the effectiveness of internal controls. During an accounts payable audit, auditors typically review:
- Segregation of duties: Ensuring invoice processing, approval, and payment are handled by different individuals
- Approval controls: Confirming that invoices are approved according to defined authority limits
- Three-way matching: Matching purchase orders, invoices, and receiving documents
- Access controls: Restricting system access to authorized personnel
- Audit trails: Maintaining clear records of approvals and payment history
Strong controls reduce the risk of errors, fraud, and non-compliance in accounts payable operations.
Accounts Payable Audit Checklist
The following checklist can help companies prepare for an accounts payable audit and support auditors during the review:
- Are all vendor invoices properly documented and approved?
- Are payments made according to agreed payment terms?
- Are duplicate vendors or invoices identified and resolved?
- Is three-way matching consistently followed?
- Are AP reconciliations performed regularly?
- Are access rights and approval hierarchies clearly defined?
Using a structured checklist strengthens the accounts payable audit program and improves audit readiness.
Four Stages of Accounts Payable Audit Program
1. Planning for an Accounts Payable Audit
Start by scheduling the Accounts Payable audit. The meeting is scheduled to discuss standard operating procedures (SOPs). The company and the accounts payable auditors establish the goals and parameters to create a precise Accounts Payable audit plan.
2. Record Examination – Fieldwork for Accounts Payable Audit Procedure
The second step of the accounts payable audit program is the fieldwork phase. In this stage, accounts payable auditors dive deep into Accounts Payable records and documentation. Auditors spend several days or weeks to determine if the transaction records are correct using a cut-off test, depending on the company’s size. They look over the company’s financials – Balance sheet, general ledger, purchase orders, vendor or supplier invoices, and other documents.
3. Accounts Payable Audit Reporting
After completing the fieldwork, accounts payable auditors put the findings into a final accounts payable audit report that compiles and analyzes the research. Auditors provide feedback. They highlight guidelines and any immediate issues and concerns.
4. Accounts Payable Audit Follow-up Review
An Accounts Payable audit report is not the end of the accounts payable audit program. Based on the report, there will be a follow-up to determine that the company has resolved the highlighted concerns and achieved satisfactory results.
Accounts Payable audit not only confirms whether the company is following proper processes, but it also helps to know how it can run the business more efficiently. By partnering with trusted accounts payable outsourcing companies as your accounts payable auditors, companies can transform AP processes and resolve concerns highlighted in the audit report to drive efficiency.