Expenses are as critical to audit as revenue.While revenue determines topline performance, expenses directly influence profitability, tax liability, and compliance exposure.
This article explains how auditors approach expense audit, what key checks are performed, and where businesses typically face audit issues.
1. Introduction — Why Expense Audit Matters
Expense audit is not limited to verifying bills.Auditors focus on whether expenses:
Are genuine and business-related
Are recorded in the correct period
Are compliant with applicable laws
Are properly classified and disclosed
Weak expense controls often result in audit adjustments and tax disallowances.
2. Objective of Expense Audit Procedures
The objectives of expense audit are to:
Verify occurrence and authenticity of expenses
Ensure completeness and accuracy
Confirm proper cut-off at year-end
Assess compliance with accounting standards and laws
Auditors aim to ensure that expenses reflect actual economic outflow.
3. Understanding the Expense Profile
Auditors begin by understanding:
Nature of major expense heads
Fixed vs variable costs
One-time or unusual expenses
Related party expenses
Understanding the expense profile helps identify risk-prone areas.
4. Key Expense Assertions Tested
Auditors test the following assertions:
Occurrence — expenses actually incurred
Completeness — all expenses are recorded
Accuracy — correct amounts recorded
Cut-off — expenses recorded in correct period
Classification — correct ledger grouping
Each assertion requires supporting evidence.
5. Substantive Audit Procedures for Expenses
Common audit procedures include:
Verification of invoices and bills
Matching invoices with supporting documents
Verification of approvals as per DOA
Payment verification through bank statements
Auditors may also perform analytical procedures.
6. Cut-Off Testing for Expenses
Expense cut-off ensures:
Expenses relating to the year are recorded
No expenses are deferred or advanced improperly
Auditors test:
Invoices before and after year-end
Accruals and provisions
Cut-off errors are a frequent audit issue.
7. Expense Accruals and Provisions
Auditors evaluate:
Whether accruals are complete and reasonable
Basis of computation
Consistency with prior periods
Unsupported accruals attract scrutiny.
Incorrect accruals distort profit and audit credibility.
8. Statutory & Compliance Linkages
Auditors also review:
TDS applicability and deduction
GST eligibility and reversals
Related party expense disclosures
Non-compliance increases audit risk.
9. Common Issues Observed in Practice
Frequently observed issues include:
Missing invoices
Personal expenses booked as business expenses
Improper ledger classification
Unsupported provisions
TDS not deducted on accrued expenses
These issues delay audit closure.
10. Practical Guidance for Businesses
Businesses should:
Enforce invoice-based booking
Document approvals clearly
Perform monthly expense review
Maintain accrual workings
Link expenses with statutory compliance
Strong discipline reduces audit stress.
11. CABTA Insight
“Expense audit tests discipline more than documentation.”