STOCK SHRINKAGE IS QUIETLY EATING YOUR MARGIN.

What counts as shrinkage

Shrinkage covers any stock that leaves your business without a matching sale or documented reason. That includes theft, whether by customers, staff or suppliers, but it also includes far less dramatic causes: damaged goods that were never written off, expired stock quietly binned without a record, portion sizes that drift larger than the recipe calls for, and simple counting errors that compound over time.

The main causes, and why each one hides differently

• Theft, by customers, staff or during delivery, is the cause most owners assume first, but it's often not the largest
• Administrative error, miscounted stock takes, incorrect receiving against a purchase order, or a sale rung up against the wrong item
• Spoilage and expiry, especially in food and perishable businesses, where stock quietly ages past sale without being written off
• Portion or recipe drift, where a kitchen or bar uses more of an ingredient per item than the recipe specifies, depleting stock faster than sales explain
• Supplier shortchange, where a delivery is short of what was invoiced and nobody checks the received quantity against the purchase order
• Untracked transfers, where stock moved between branches or departments is never logged on either end

How to actually measure it

You can't fix shrinkage you can't see. The starting point is a regular stock take, compared against what your system says you should have, expressed as a percentage of stock value or of sales. A single annual stock take tells you shrinkage happened sometime in the last year, which is close to useless for finding the cause. Frequent, smaller counts on high-value or fast-moving items narrow the window enough to actually investigate what went wrong and when.

Practical steps to reduce it

• Count little and often. Weekly spot checks on your highest-value items catch problems within days, not months
• Tag every adjustment with a reason. Damage, theft, expiry and recount are different problems with different fixes, and lumping them together hides the pattern
• Reconcile every delivery against its purchase order before it's accepted into stock, catching supplier shortages at the door instead of weeks later
• Use recipe-based depletion for any prepared item, so ingredient stock automatically reflects what should have been used, making drift visible instead of invisible
• Restrict who can adjust stock, and log every adjustment against a named user, so accountability isn't guesswork
• Log every branch transfer the same way you'd log a sale, with both sides of the transfer recorded

Why this matters more as you grow

Shrinkage as a percentage tends to get worse, not better, as a business adds locations and staff, simply because there are more hands touching stock and less direct owner oversight on any single item. A shrinkage rate that was tolerable for one store run by its owner often becomes a serious margin problem across three stores run by managers. The businesses that keep shrinkage under control as they scale are almost always the ones that built the habit of measuring it early, with a system that makes tracking effortless instead of a once-a-year fire drill.