Accrual-Based Revenue Audit: Technical Procedure for Accounts Receivable Flow Testing, Bank Book Validation, and Output VAT Equalization

In the paradigm of modern tax audits under Minister of Finance Regulation Number 15 of 2025, the validity of reported Turnover is the heart of Corporate Taxpayer compliance testing. Given that commercial bookkeeping systems are generally accrual-based, Tax Auditors cannot rely solely on cash receipt evidence. The most comprehensive method frequently used to test the assertion of completeness for income is the Accounts Receivable Flow Test.

This article will dissect in depth the technical procedure of this test, which does not stand alone but involves data triangulation between the Accounts Receivable Ledger, Bank Statements/Books, and Periodic VAT Reporting. This discussion is based on SE-65/PJ/2013 regarding Guidelines for the Use of Audit Methods and Techniques and other DGT technical audit modules.

Basic Concept: Why Accounts Receivable Flow Test?

The accounts receivable flow test is conducted to obtain the value of sales or turnover on an accrual basis within a tax year by reconstructing the receivables cycle. The underlying accounting logic is: Credit Sales increase Receivables, while Settlements decrease Receivables.

By reversing this logic, Tax Auditors use the following basic formula to derive the Sales value:

The biggest challenge in this audit is not the beginning or ending balances, but verifying the "AR Settlements" and ensuring that these settlement figures are consistent with cash inflows in the bank and the VAT obligations that have been collected.

Stage 1: Establishing Beginning and Ending Balances (Cut-Off Testing)

The first step in this procedure is ensuring the accuracy of the balance sheet. The Auditor will perform:

• Vouching AR Balances: Comparing the trade receivables balance in the current year's Corporate CIT Return Balance Sheet with the previous year's (for the beginning balance) and the Subsidiary Accounts Receivable Ledger.
• Identifying Customer Advances: Customer advance balances substantively reduce receivables. The Auditor will record the Beginning and Ending Balances of Customer Advances as adjustment variables in the receivables flow formula.

Stage 2: Dissecting AR Settlements via Bank Books (Tracing & Vouching)

This is the most crucial stage. The Auditor must ensure that the "AR Settlements" claimed by the Taxpayer actually occurred and separate cash flows that do not originate from sales.

Technical Procedures:

1. Bank Credit Mutation Analysis: The Auditor will request bank statements and the General Ledger of the Bank. Based on the authority in PP Number 50 of 2022, the Auditor can access detailed banking transactions.
2. Cash Inflow Purification: Not all money coming in is an AR settlement. The Auditor will exclude non-sales transactions, such as:
   • Owner capital injections.
   • Bank loan disbursements.
   • Transfers between own accounts.
   • Interest income from current accounts.
3. Cross-Check to Subsidiary AR Ledger: The Auditor performs tracing from the credit side of the Subsidiary AR Ledger to the debit side of the Bank Book.

Stage 3: Integration with Output VAT (The VAT Nexus)

After obtaining the "Cash Received from Customers" figure, the Auditor does not immediately recognize it as Corporate CIT Turnover. This figure is generally Gross (inclusive of VAT).

A. Removing VAT Element (Netting-Out)

The Auditor must remove the 11% VAT element so that the CIT Sales figure becomes net.
Formula: Gross Receipts / 1.11 = Tax Base (DPP).

B. Cross-Check with Periodic VAT Returns

If Estimated AR Flow VAT > VAT in Periodic Return, there is an indication of sales without issuing Tax Invoices (under-the-table sales).

Stage 4: Final Reconciliation and Turnover Determination

The Auditor compiles the KKP with the following comprehensive formula:

Case Study: Dispute Vulnerability Points

• Bad Debt Write-offs: Must meet Article 6 (1) h of the Income Tax Law. If not, the write-off is corrected, increasing turnover.
• Exchange Rate Differences: Differences between realization rates and tax rates must be reconciled.
• Inter-Period Invoicing: Time differences between delivery and cash settlement often cause mismatches.

Conclusion and Recommendations

In the era of the Coretax System, data integration becomes automated. For Taxpayers, it is recommended to:

1. Recording Discipline: Clear references between GL journals and bank evidence.
2. Self-Equalization: Perform internal tests periodically before filing.
3. Non-Sales Documentation: Keep strong evidence for shareholder loans or other non-turnover inflows.

Reference Sources:

• [PMK 15 Year 2025] - Procedures for Tax Audit.
• [SE-65/PJ/2013] - Guidelines for the Use of Audit Methods and Techniques.
• [SE-08/PJ/2012] - Audit Working Paper for Sales Equalization.