When a stock audit reveals a variance, the first assumption is often theft. In practice, most discrepancies come from everyday process gaps: a transfer recorded in one system and not the other, a return that never made it back to the shelf, or a product with a missing tag. Knowing the common causes makes variances faster to explain, and easier to prevent.
1. Untagged or unidentified products
Items without labels, barcodes or price tags cannot be matched to records, so they show as both a shortage and an excess. Fix: tag at receipt, and include an “unidentified stock” step in every count.
2. Inter-store and warehouse transfers in transit
Stock dispatched from one location but not yet received at another can disappear from both counts. Fix: maintain an in-transit ledger and reconcile it at the audit cut-off.
3. Customer-reserved stock
Products held aside for customers, often moved between stores and warehouses, are easily missed or double-counted. Fix: keep reserved stock in a marked area with a matching reservation log.
4. Returns and exchanges not processed
Returned items sitting in the back room without being entered back into inventory create phantom shortages. Fix: process returns on the same day and audit the returns area separately.
5. Damaged and expired goods
Stock written off physically but not in the system, or vice versa, distorts both figures. Fix: a clear damage and expiry process with approvals and timely write-offs.
6. Receiving errors
Short or excess deliveries accepted without checking against the invoice carry the error forward indefinitely. Fix: count against the purchase order at the receiving dock, every time.
7. Billing and SKU mix-ups
Selling one variant but billing another, such as the wrong size or colour, creates matching shortages and excesses. Fix: scan at billing rather than keying codes manually, and review paired variances together.
8. Duplicate or missed counts
In large locations, the same bay can be counted twice or skipped entirely. Fix: map the location into zones, assign each to an auditor, and review count sheets and photographs for duplicates before reconciliation.
Turning findings into fewer variances
The real value of a stock audit is the pattern behind the numbers. Tracking which discrepancy types recur, at which locations, points directly to the process that needs fixing. Combined with daily MIS, variance reports and an issue log that is closed out after each audit, stores and warehouses can steadily bring variance down, audit after audit.
Want this evidence for your brand? Talk to our team about a study scoped to your customers, channels and goals, or write to growth@bridgeloyalty.com.