A warehouse inventory audit should do more than confirm that the stock numbers add up. It should provide confidence that the processes behind those numbers are working.

That means asking questions such as:

Is inventory physically where the WMS says it is?

How much of the warehouse has actually been checked?

When was each area last verified?

Are high-level locations included?

What happens when a discrepancy is found?

Can the business provide evidence of previous physical checks?

A strong inventory audit tests the control environment, not just the final inventory figure. Where those controls are weak, stock audit risk increases.

This checklist provides 14 practical areas to review.

14 warehouse inventory audit checks

1. Define how inventory accuracy is calculated

Start with the KPI. What does “inventory accuracy” actually mean in your warehouse?

Is it based on:

• quantity
• SKU
• pallet identity
• location
• inventory value
• some combination of the above?

Is the calculation documented?

Without a consistent definition, the headline percentage is difficult to interpret or compare over time.

2. Confirm physical verification coverage

How much of the warehouse has physically been checked? This should include the percentage of relevant areas that have been verified within the defined period:

• locations
• pallets
• SKUs
• storage areas

A strong accuracy figure based on limited physical coverage may provide less assurance than a slightly lower figure supported by broader verification.

3. Check when inventory was last physically verified

Inventory condition changes continuously. A physical check completed yesterday provides different evidence from one completed nine months ago.

An audit should therefore consider:

• date of last verification
• overdue locations
• average verification age
• maximum interval between physical checks

This shows how long discrepancies could potentially remain hidden.

4. Confirm high-level inventory is included

High-bay locations are often more difficult to inspect manually. That naturally makes them vulnerable to being checked less frequently.

Review whether high-level pallet positions receive appropriate physical verification. If they don't, understand how the additional risk is being controlled.

5. Verify expected empty locations

An inventory audit should confirm both presence and absence. If the WMS says a location is empty, physically confirm that the location really is empty.

Unexpectedly occupied locations can affect:

• capacity
• putaway
• customer inventory ownership
• location planning
• inventory accuracy

Likewise, a physically empty location where stock is expected may indicate phantom inventory.

6. Compare physical observations with WMS expectations

For every checked location, the audit process should be able to establish:

• what the WMS expected
• what was physically found
• whether the two matched

This turns counting into reconciliation. Without that direct comparison, the business may know how much inventory was observed without knowing whether it was actually in the correct place.

7. Check whether evidence is retained

What evidence exists that the physical verification occurred? Depending on the process, that might include:

• scan records
• timestamps
• user information
• photographs
• location-level observations
• reconciliation logs

Evidence improves both auditability and later discrepancy investigation.

8. Review how discrepancies are classified

Not every inventory discrepancy is the same. A mature process should distinguish between issues such as:

• expected inventory missing
• unexpected inventory
• wrong pallet
• unreadable label
• wrong location
• unexpected occupied location
• WMS correction required
• warehouse investigation required

Discrepancy classification helps turn individual errors into useful management information.

9. Confirm every exception has an owner

Finding a discrepancy is only useful if somebody is responsible for resolving it.

Review:

• who owns open exceptions
• how long they have been open
• escalation rules
• closure criteria
• whether overdue discrepancies are visible

Unowned exceptions tend to become permanent inventory uncertainty.

10. Separate inventory correction from root cause analysis

A stock adjustment restores the system record. It does not necessarily fix the process that created the discrepancy.

An audit should look for evidence that recurring inventory errors are being investigated.

For example:

Why was the pallet in the wrong location?

Why was the movement not recorded?

Why is the same aisle producing repeated exceptions?

Inventory control improvement comes from answering those questions.

11. Review discrepancy trends

A good audit looks backwards as well as at today's inventory.

Track whether:

• discrepancies are reducing or increasing
• particular locations create repeated issues
• the same discrepancy categories continue
• exception resolution is getting faster
• physical coverage is improving

This trend information shows whether the underlying control environment is strengthening.

12. Understand dependence on manual labour

Review how much resource is required to maintain the current inventory control process.

Consider:

• hours spent cycle counting
• overtime
• powered access equipment
• disruption to operations
• cancelled or delayed counts
• additional labour during annual stocktakes

A control that only works when extra labour is available may not be sustainable.

13. Test whether the WMS is being treated as physical proof

A WMS is an essential warehouse record, but it records what the system believes should be present.

That is different from independent evidence of what is physically there.

An audit should distinguish between:

System evidence
Recorded transactions and expected inventory.

and:

Physical evidence
What was actually observed in the location.

Strong inventory assurance requires both.

14. Review what happens between formal audits

Perhaps the most important question is:

What happens after the audit is finished?

Does the business return to relying on assumed accuracy until the next formal count? Or does regular physical verification continue throughout the year?

An audit should be used to validate an effective ongoing inventory control process. It should not be the event that creates one temporarily.

Warehouse inventory audit scorecard

A well controlled operation should be able to answer “yes” to most of the following:

1. We have a documented inventory accuracy calculation.
2. We know how much of the warehouse has physically been checked.
3. We know when locations were last verified.
4. High-level inventory is included.
5. Expected-empty locations are checked.
6. Physical observations are reconciled against the WMS.
7. Evidence is retained.
8. Exceptions are classified.
9. Every discrepancy has an owner.
10. Root causes are tracked.
11. Management can see discrepancy trends.
12. Verification coverage is sustainable.
13. WMS records are not treated as physical proof.
14. Inventory control continues between formal audits.

If several of those answers are unclear, the issue may not be today's inventory accuracy. It is more likely to be the strength of the assurance behind it.

Assess the controls before the next audit

RAWview's free Inventory Assurance Health Check uses many of these same principles to assess physical verification, coverage, reconciliation, exception handling and governance.

It provides a useful indication of where your current inventory-control process is strong and where exposure may remain.

‍

Frequently asked questions

What should a warehouse inventory audit include?

A warehouse inventory audit should include physical stock verification, WMS reconciliation, coverage, verification frequency, exception management, evidence, root cause analysis and review of inventory control performance over time.

How do you prepare for a warehouse inventory audit?

Confirm how accuracy is calculated, identify un-verified inventory, reconcile open discrepancies, ensure evidence is available and review whether all warehouse areas, including high-level and expected-empty locations, are being physically checked.

Is a WMS enough for an inventory audit?

No. A WMS provides the expected digital inventory position, whereas hysical verification provides independent evidence of what is actually present. Strong inventory control uses both.