Glossary
What is inventory variance?
Inventory variance is the difference between the recorded quantity of an item and the quantity actually counted.
Definition
Variance is the most useful number in inventory management because it tells you whether your records can be trusted. Tracked over time and per SKU, location, and user, variance reveals process gaps: a bin with a faded label, a supplier whose case packs are misconfigured, an employee who never got trained on the scan workflow. Where teams get this wrong: adjusting variance without investigating it. The system gets corrected, the underlying cause survives, and the same variance shows up next quarter. Fix: a small dollar threshold below which adjustments are made silently (the time isn't worth it) and a mandatory cause-code log above it. Industry baseline accuracy targets are 95% to 99% for finished goods. Most spreadsheet-run small businesses sit closer to 80% to 90% until they adopt scanning, cycle counting, and named accuracy ownership.
Formula
Variance = Counted Quantity - System Recorded Quantity
Example
A weekly cycle count shows 47 units of a part on the shelf but the system records 52, a variance of 5 units. Before adjusting, the manager finds an unrecorded transfer to a service truck and updates that transfer rather than writing off the difference.
By Cameron Priest · Co-founder, Order3
Cameron Priest builds inventory and order management software for people who run physical stock.
Updated 2026-06-16
Related terms
Where this lives in Order3