Stock leakage, the polite name for inventory that disappears without explanation, quietly costs many small businesses between two and five percent of stock value every year. The fixes are rarely expensive. They are about closing the gaps where goods move without a record. Here are seven controls that work in real warehouses.
Every hour between the physical movement and the record is an hour where memory fades and quantities blur. The rule: nothing leaves or enters the store without an entry first.
An entry that names a responsible person changes behaviour. Better still, use two-person authorization: one person records the movement, a different person approves it before stock changes. This single control eliminates most casual leakage.
If you only learn your stock level at the month-end count, you learn about a problem weeks after it happened. A running balance after every transaction shows the exact day the book figure and the shelf figure diverged.
Low-stock alerts are not just about reordering, a product that hits zero unusually fast is your earliest leakage signal.
A negative balance is mathematically impossible in a healthy system: it means something left the store without being received first. Treat it as an incident, not a rounding error.
Recording batch numbers on receipts and issues means any dispute traces back to a specific delivery, and expiry write-offs stop being a surprise.
Controls only survive if they are easy. If producing a movement history takes five seconds instead of an afternoon of chasing paper, your team will actually use the system, and people behave differently when they know the record is one click away.
Best-run warehouses keep unexplained variance under 0.5% of throughput. If you are above 2%, controls, not staff, are usually the problem.
No. Every control above needs only disciplined recording and a running balance. Software like Cardtory automates the arithmetic and the audit trail, but the principles cost nothing.
