14th Jan

kohlimaudit

Inventory Audit in Singapore: Key Documents and Controls Auditors Look For

For trading, manufacturing, wholesale, retail, and F&B businesses in Singapore, inventory is often one of the largest balances on the balance sheet — and one of the most common sources of audit adjustments.

From an auditor’s perspective, inventory carries high risk because it directly affects profit, is prone to estimation, and is vulnerable to error or obsolescence. As a result, inventory is an area where auditors focus heavily, ask many questions, and often request extensive documentation.

This article explains how inventory is audited in Singapore, the key documents and controls auditors expect to see, and how businesses can prepare to avoid last-minute issues and audit delays.

1. Why Inventory Is a High-Risk Area in Audits

Auditors consider inventory high-risk because:

It affects both profit and assets
Valuation often involves judgement
Obsolescence is easy to overlook
Physical quantities may differ from records
Cut-off errors are common at year-end

Even small errors in inventory can materially distort financial results.

2. Auditor’s Core Objectives When Auditing Inventory

When auditing inventory, auditors are not just checking numbers. They are trying to conclude whether inventory:

Exists (it is physically there)
Is complete (nothing significant is missing)
Is owned by the company
Is valued correctly
Is recorded in the correct accounting period

Every audit procedure ties back to one or more of these objectives.

3. Inventory Types Commonly Seen in Singapore SMEs

Auditors tailor procedures depending on inventory type, such as:

Raw materials
Work-in-progress (WIP)
Finished goods
Trading stock
Consumables
Packaging materials

The more complex the inventory mix, the more audit work is required.

4. Key Inventory Documents Auditors Look For

4.1 Year-End Stock Count Records

This is the single most important inventory document.

Auditors expect:

A physical stock count conducted at or near year-end
Signed stock count sheets
Clear item descriptions and quantities
Evidence of review and approval

If auditors attend the stock count, they will observe procedures and perform test counts.

Common issues auditors flag:

No stock count conducted
Counts done months after year-end
Missing signatures
Poor segregation of counted vs uncounted items

4.2 Inventory Listing (Stock Take Report)

Auditors will request a detailed inventory listing showing:

Item description
Quantity on hand
Unit cost
Total value

This listing must reconcile to:

The general ledger
The trial balance

Any differences must be explained.

4.3 Costing Methodology Documentation

Auditors need to understand how inventory costs are determined.

They will ask:

FIFO, weighted average, or other method?
How are costs accumulated?
Are overheads included?
Is the method applied consistently?

Lack of clarity here often leads to valuation adjustments.

4.4 Purchase Invoices and Supplier Documents

Auditors test:

Unit costs
Cut-off
Ownership

They will select samples of inventory items and trace costs back to:

Supplier invoices
Delivery orders
Import documentation (if applicable)

4.5 Goods Received Notes (GRNs)

GRNs help auditors verify:

Cut-off accuracy
Completeness of inventory
Timing of ownership transfer

Missing or poorly maintained GRNs raise red flags.

4.6 Sales Invoices and Delivery Orders (for Cut-Off)

Auditors review:

Sales made just before and after year-end
Whether goods were delivered before revenue was recognised
Whether inventory was properly reduced

Cut-off errors are among the most common inventory audit findings.

4.7 Obsolescence and Slow-Moving Inventory Analysis

Auditors expect management to assess:

Slow-moving items
Obsolete stock
Damaged goods
Expired products (especially in F&B)

Auditors often ask for:

Inventory ageing reports
Movement history
Management’s write-down assessment

Ignoring obsolescence is a frequent cause of audit adjustments.

4.8 Inventory Write-Off or Write-Down Documentation

If inventory has been:

Written off
Written down
Scrapped

Auditors expect:

Approval documentation
Reason for write-off
Evidence of disposal

Unsupported write-offs are often challenged.

5. Key Inventory Controls Auditors Expect to See

5.1 Physical Control Over Inventory

Auditors assess whether inventory is:

Stored securely
Access-controlled
Properly labelled

Poor physical control increases risk of loss or misstatement.

5.2 Segregation of Duties

Ideally:

Purchasing, receiving, and recording are handled by different people
Stock counts are reviewed independently

In SMEs, perfect segregation may not be possible — but compensating controls should exist.

5.3 Regular Stock Counts (Not Just Year-End)

Auditors prefer:

Periodic cycle counts
Surprise checks
Reconciliations of differences

Relying solely on a once-a-year count increases risk.

5.4 Inventory System Controls

Auditors assess:

Whether inventory is tracked via system or spreadsheets
Access rights and controls
Audit trails for adjustments

Manual systems are not wrong — but they require stronger controls and documentation.

6. Common Inventory Audit Issues in Singapore SMEs

6.1 No Proper Stock Count Conducted

This often leads to:

Extended audit procedures
Reliance issues
Potential audit qualification in severe cases

6.2 Inventory Not Reconciled to General Ledger

Differences between:

Stock records
Accounting records

…must be reconciled. Unreconciled differences undermine reliability.

6.3 Obsolete Inventory Still Carried at Cost

Auditors frequently adjust:

Old stock
Non-moving items
Expired goods

Failure to write down inventory overstates profit.

6.4 Incorrect Costing

Examples include:

Using outdated prices
Ignoring freight or import duties
Inconsistent costing methods

Auditors require consistency and support.

6.5 Cut-Off Errors at Year-End

Typical problems:

Goods sold but still counted in inventory
Goods purchased but not recorded
Timing mismatches between sales and stock reduction

7. How Inventory Issues Affect the Audit Outcome

Inventory problems can lead to:

Profit adjustments
Delayed audit completion
Increased audit fees
Additional audit procedures
Management letter findings
In extreme cases, modified audit opinions

Directors remain responsible for the accuracy of inventory figures filed with Accounting and Corporate Regulatory Authority.

8. How to Prepare for an Inventory Audit (Practical Steps)

8.1 Plan the Year-End Stock Count Early

Before year-end:

Decide stock count date
Assign roles
Prepare count sheets
Freeze movements during count if possible

Planning avoids chaos.

8.2 Clean Up Inventory Records Before the Audit

Before auditors arrive:

Reconcile inventory to GL
Clear negative stock balances
Review unusual adjustments
Investigate large variances

8.3 Review Obsolescence Honestly

Ask:

What hasn’t moved in 6–12 months?
Is this stock saleable?
Would we buy this again?

Auditors prefer realistic write-downs over optimistic assumptions.

8.4 Document Judgements Clearly

If you decide not to write down inventory:

Document why
Support with evidence (sales plans, orders, usage)

Judgement without documentation invites audit adjustments.

9. How to Work With Auditors During Inventory Testing

Best practices:

Provide documents promptly
Explain processes clearly
Be transparent about issues
Avoid defensive responses

Auditors expect issues — what matters is how they are handled.

10. When Inventory Problems Signal Bigger Issues

Repeated inventory findings may indicate:

Weak internal controls
Poor operational discipline
Lack of ownership over stock
Over-reliance on year-end fixes

In such cases, operational improvements are needed — not just accounting adjustments.

11. Turning Inventory Audits Into a Strength

Well-managed inventory processes:

Reduce audit friction
Improve cashflow
Reduce write-offs
Enhance profitability
Build credibility with banks and investors

Good inventory control is both an audit strength and a business advantage.

12. Final Thoughts: Inventory Audits Are About Control, Not Just Counting

Inventory audits in Singapore are not just about counting boxes. They are about:

Ownership
Valuation
Cut-off
Discipline
Documentation

SMEs that understand what auditors look for — and prepare accordingly — experience:

Faster audits
Fewer adjustments
Lower long-term audit costs
More confidence in their numbers

The goal is not perfection —
it is control, consistency, and clarity.

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