02/06/2026
Audit Procedure for Inventory
When people hear the word inventory, they usually think about goods sitting in a warehouse or products displayed in a supermarket. But in accounting and auditing, inventory is far more important than just “goods on shelves.”
Inventory is often one of the biggest assets a business owns. If inventory is recorded wrongly, the company’s profit, assets, and even financial position can become misleading. That is why auditors pay serious attention to inventory during an audit.
Think about it this way:
- If inventory is overstated, profit may appear higher than it truly is.
- If inventory is understated, profit may appear lower.
- Missing, damaged, or obsolete goods can distort the financial statements.
This is why inventory audit procedures are extremely important.
What is Inventory?
Inventory refers to goods that a business holds for:
- Sale,
- Production, or
- Future use in operations.
Examples include:
- Goods in a supermarket,
- Raw materials in a factory,
- Spare parts in a manufacturing company,
- Finished products waiting for customers.
Meaning of Audit Procedure for Inventory:
Audit procedures for inventory are the steps an auditor performs to verify that inventory:
1. Actually exists,
2. Belongs to the company,
3. Is properly valued,
4. Is accurately recorded, and
5. Is correctly disclosed in the financial statements.
The auditor is not just checking numbers on paper. The auditor wants evidence that the inventory figure shown in the accounts is reliable.
Why Inventory Audit is Important
Inventory is sensitive because it can easily be:
- Stolen,
- Damaged,
- Manipulated,
- Overcounted,
- Undercounted, or
- Valued wrongly.
Many companies have collapsed because inventory records were manipulated.
An error in inventory affects:
- Cost of sales,
- Gross profit,
- Net profit,
- Current assets,
- Working capital.
This makes inventory one of the most critical areas during an audit.
Main Audit Objectives for Inventory:
Before performing audit procedures, the auditor normally asks these important questions:
1. Existence
Does the inventory truly exist physically?
2. Completeness
Has all inventory been recorded?
3. Ownership/Rights
Does the inventory belong to the company?
4. Valuation
Is the inventory valued correctly?
5. Presentation and Disclosure
Is inventory properly presented in the financial statements?
These objectives guide every inventory audit procedure.
Major Audit Procedures for Inventory:
1. Physical Inventory Count Observation:
This is one of the most important inventory audit procedures.
The auditor visits the warehouse, store, or production site to observe stock counting.
The auditor checks:
- Whether counting is done properly,
- Whether staff follow procedures,
- Whether inventory physically exists,
- Whether damaged items are separated.
What the Auditor Does:
- Observe counting teams,
- Perform test counts,
- Compare physical count with inventory records,
- Check labels and descriptions.
Why This Matters:
A company may claim it has 5,000 bags of rice in stock, but physical counting may reveal only 3,500 bags.
Without physical verification, the records may be misleading.
2. Test Count Procedure:
The auditor selects some inventory items and recounts them independently.
"This is called test counting"
The auditor may:
- Count from warehouse to records, or
- From records to warehouse.
This helps detect:
- Counting errors,
- Missing inventory,
- Duplicate records.
3. Inspection of Inventory Condition:
Not all inventory has full value.
Some items may be:
- Expired,
- Damaged,
- Obsolete,
- Rusted,
- Slow-moving.
The auditor checks inventory condition carefully.
For example:
A pharmaceutical company may still record expired drugs as active inventory. This would overstate assets.
The auditor ensures such goods are:
- Written down,
- Removed, or
- Properly valued.
4. Cut-Off Testing:
This procedure checks whether inventory transactions were recorded in the correct accounting period.
The auditor verifies:
- Purchases near year-end,
- Sales near year-end,
- Goods received notes,
- Delivery notes.
Example:
Suppose goods were received on January 3rd but recorded in December. This could overstate inventory.
The auditor ensures transactions belong to the correct period.
5. Reconciliation of Inventory Records:
The auditor compares:
- Physical inventory count,
- Inventory ledger,
- General ledger,
- Financial statements.
The figures must agree.
Any difference must be investigated.
This helps identify:
- Posting errors,
- Missing entries,
- Fraud,
- System mistakes.
6. Valuation Testing:
Inventory should be valued properly according to accounting standards.
Usually, inventory is valued at:
Lower of:
- Cost, or
- Net realizable value (NRV).
The auditor checks:
- Purchase invoices,
- Cost calculations,
- Production costs,
- Market selling prices.
Example:
If a product cost ₦10,000 but can only be sold for ₦7,000 due to damage or market decline, it should not remain valued at ₦10,000.
7. Checking Ownership of Inventory:
Sometimes goods in a warehouse may not belong to the company.
Examples include:
- Goods held on consignment,
- Customer goods,
- Goods belonging to suppliers.
The auditor verifies ownership through:
- Purchase documents,
- Shipping records,
- Contracts,
- Supplier confirmations.
The company should not record goods it does not own.
8. Analytical Procedures:
The auditor compares inventory figures with previous years or industry expectations.
For example:
- Gross profit ratio,
- Inventory turnover ratio,
- Stock movement trends.
If inventory suddenly doubles while sales remain the same, the auditor may suspect:
- Overstatement,
- Slow-moving goods,
- Fraud.
Analytical review helps identify unusual patterns.
9. Verification of Inventory Documents:
The auditor examines supporting documents such as:
- Purchase invoices,
- Goods received notes,
- Stock cards,
- Bin cards,
- Delivery notes,
- Production reports.
Documents provide evidence that inventory transactions are genuine.
10. Confirmation from Third Parties:
Sometimes inventory may be kept outside the company premises.
Examples:
- Goods in public warehouses,
- Inventory held by distributors,
- Goods with third-party logistics companies.
The auditor may request confirmation directly from those third parties.
Common Inventory Audit Risks:
Inventory auditing is challenging because several risks exist.
Common risks include:
- Theft of inventory,
- Fake inventory records,
- Double counting,
- Obsolete stock,
- Wrong valuation,
- Poor documentation,
- Cut-off errors,
- Fraudulent manipulation.
Auditors remain professionally skeptical throughout the process.
Internal Controls Over Inventory:
Strong internal controls reduce inventory problems.
Good controls include:
- Proper authorization,
- Segregation of duties,
- Regular stock counts,
- CCTV monitoring,
- Restricted warehouse access,
- Proper documentation,
- Inventory management systems.
Auditors assess these controls before deciding how much testing to perform.
Case study 1: The Case of PrimeMart Manufacturing Ltd.
PrimeMart Manufacturing Ltd. is a fast-growing company that produces beverages and packaged food products. Over the years, the company expanded rapidly and opened multiple warehouses across the country.
At the end of the financial year, the company reported inventory worth ₦480 million in its financial statements. Since inventory was one of the largest assets of the business, the external auditors decided to pay special attention to it during the audit.
The audit team visited the company’s main warehouse to perform inventory audit procedures.
Step1: Physical Verification:
On arrival, the auditors observed the stock counting exercise conducted by warehouse staff.
The audit manager instructed the team to perform test counts on selected inventory items.
One of the auditors checked a section where 2,000 cartons of juice were recorded in the stock sheet. After counting physically, only 1,650 cartons were available.
"Immediately, the auditors noticed a discrepancy"
Further investigation revealed that some cartons had been transferred to another branch but were still included in the warehouse records.
This helped prevent overstatement of inventory.
Step 2: Inspection of Inventory Condition:
While moving around the warehouse, the audit team discovered:
- Damaged cartons,
- Expired products,
- Dust-covered slow-moving goods.
However, these items were still valued at full cost in the accounting records.
The auditors informed management that inventory should be valued at the lower of cost and net realizable value.
As a result:
- Expired products were written off,
- Damaged goods were reduced in value.
This ensured the financial statements reflected realistic inventory values.
Step 3: Cut-Off Testing:
The auditors reviewed purchases and sales made close to year-end.
They discovered that goods received on January 4th were mistakenly recorded as December purchases.
Because of this:
- Inventory was overstated,
- Liabilities were understated.
The auditors recommended correction of the entries to ensure transactions were recorded in the proper accounting period.
Step 4: Documentation Review:
The audit team requested supporting documents including:
- Purchase invoices,
- Goods received notes (GRNs),
- Delivery notes,
- Stock cards.
During review, they discovered that some inventory records had no supporting invoices.
This raised concerns about:
- Unauthorized purchases,
- Recording errors,
- Possible fraud.
Management was asked to provide explanations and supporting evidence.
Step 5: Ownership Verification:
The auditors noticed that some goods stored in the warehouse actually belonged to a supplier under a consignment arrangement.
Although the goods were physically present, they did not belong to PrimeMart Manufacturing Ltd.
The auditors instructed management to remove those items from inventory records to avoid overstating company assets.
Step 6: Analytical Procedures:
The auditors compared inventory figures with previous years.
They observed that:
- Inventory increased by 45%,
- But sales increased by only 8%.
This unusual movement suggested possible:
- Slow-moving inventory,
- Overstocking,
- Recording issues.
Further investigation confirmed that the company had accumulated excessive unsold products.
Final Audit Outcome:
After completing all inventory audit procedures, the auditors proposed several adjustments:
- Removal of expired goods,
- Correction of duplicated stock records,
- Proper cut-off adjustments,
- Removal of consignment inventory,
- Reduction in overvalued stock.
Eventually, inventory reduced from ₦480 million to ₦421 million.
Without proper audit procedures, the company’s financial statements would have been materially misleading.
This scenario shows that inventory auditing is far more than counting goods.
A professional auditor must:
- Verify existence,
- Check valuation,
- Confirm ownership,
- Review documents,
- Analyze trends,
- Detect errors and fraud risks.
The scenario also demonstrates why inventory is considered one of the most sensitive areas in auditing.
Because in business:
-Every count matters.
-Every record matters.
-And every detail can affect the credibility of financial statements.
Case study 2:
Imagine a beverage manufacturing company preparing its year-end accounts.
The company reports inventory worth ₦250 million.
During the audit:
- The auditor visits the warehouse,
- Performs physical stock count,
- Notices many expired drinks,
- Finds damaged cartons hidden behind shelves,
- Discovers some goods counted twice,
- Identifies inventory recorded before delivery.
After adjustment:
- Actual inventory falls to ₦210 million.
This means the company originally overstated inventory by ₦40 million.
Without proper audit procedures, users of the financial statements would have been misled.
Challenges Auditors Face During Inventory Audit:
Inventory auditing is not always easy.
Some common challenges include:
- Large warehouse size,
- Poor stock records,
- Uncooperative staff,
- Missing documents,
- Multiple business locations,
- Complex valuation methods,
- Time pressure.
Experienced auditors must combine observation, analysis, and professional judgment.
To understand inventory audit better, always remember these five key words:
ECVOP
- E – Existence
- C – Completeness
- V – Valuation
- O – Ownership
- P – Presentation
Inventory is one of the most sensitive and important areas in accounting and auditing. A small error in inventory can affect profit, assets, and business decisions significantly.
That is why auditors carefully examine inventory through:
- Physical count observation,
- Valuation testing,
- Cut-off procedures,
- Reconciliation,
- Inspection,
- Analytical review,
- Verification of ownership.
An effective inventory audit helps ensure that financial statements are reliable, accurate, and trustworthy.
At the end of the day, inventory audit is not just about counting goods — it is about protecting the integrity of financial information.
