Inventory Shrinkage

Inventory shrinkage is the difference between the quantity or value of stock that a restaurant’s records indicate should be available and the quantity or value actually counted. Shrinkage may result from waste, spoilage, theft, unrecorded staff meals, incorrect portioning, receiving errors, recipe deviations, breakage or inaccurate inventory counts.

How inventory shrinkage is measured

Inventory shrinkage = Recorded or expected inventory − Actual counted inventory

It can be measured in units, weight or dollar value. The calculation should use the same products, time period and valuation method for both sides of the comparison.

Restaurant example

If inventory records show that 40 kg of beef should be on hand but the physical count finds 36 kg, the unexplained difference is 4 kg. The manager should investigate receiving, transfers, production usage, waste records and count accuracy before deciding what caused the variance.

Common causes and controls

• Receiving errors: verify delivery weights, case counts and invoice details.
• Waste and spoilage: record trim loss, expired stock and discarded product.
• Portion variation: use standardized recipes, scales and portion tools.
• Unrecorded usage: record staff meals, complimentary items and transfers.
• Inventory errors: use consistent units, trained counters and regular reconciliation.
• Theft or loss: maintain appropriate access controls and investigate unexplained patterns.

Chef’s tip: Treat shrinkage as a signal to investigate, not proof of theft. Compare inventory movement with POS sales, production records, waste logs and supplier invoices.

Key distinction: Inventory shrinkage is the unexplained or unplanned reduction in stock; it is not the same as normal, documented recipe usage or expected cooking yield loss.