Shrinkage measures inventory that’s simply missing — theft, damage, administrative error, or spoilage — between what the books say and what a physical count finds.
How it works
Book (expected) inventory minus physical (actual counted) inventory gives the shrinkage amount. Dividing by book inventory gives the shrinkage rate as a percentage.
What this does not include
This computes the total shrinkage figure but doesn’t diagnose its cause — theft, damage, spoilage, and recordkeeping errors each require different investigation and prevention approaches.
How to use this calculator
- Enter book inventory value and physical (counted) inventory value.
A worked example
Book inventory of $500,000 against a physical count of $485,000: shrinkage amount = 500,000 − 485,000 = $15,000, shrinkage rate = 15,000 ÷ 500,000 × 100 = 3%.
What the variables mean
| Variable | Meaning |
|---|---|
| Book inventory | What inventory records say should be on hand |
| Physical inventory | What an actual physical count finds on hand |
Edge cases worth knowing
Shrinkage isn’t only theft — it also captures damage, spoilage, administrative errors, and vendor fraud, all lumped into the same book-versus-physical gap.
Zero book inventory makes the shrinkage rate undefined — there’s no recorded baseline to measure the loss percentage against.
Frequently asked questions
What’s a typical retail shrinkage rate?
Industry surveys commonly report shrinkage averaging around 1.5% of retail sales, though this varies significantly by retail category and loss-prevention practices.
What causes most inventory shrinkage?
Commonly cited causes include employee theft, shoplifting, administrative and paperwork errors, and vendor fraud — the specific mix varies by business type.
What does a negative shrinkage figure mean?
An “overage” — physical count exceeding book records — worth investigating as a possible recordkeeping error (like a missed receiving entry) rather than treated as a loss.
