How to prevent theft and shrinkage in your shop
You cash up at the end of the day, everything seems to add up, and yet every so often you notice that "things are missing". It's rarely a masked burglar: most of what a shop loses drains away slowly, a unit at a time, somewhere between shoplifting, honest slips and paperwork mistakes. The good news is that nearly all of it can be prevented with a bit of order and a handful of cheap habits. Here's how, with no scaremongering and without pointing the finger at anyone.
What "unknown loss" is
In the retail world, the gap between the stock you should have according to your records and what's actually on the shelf — with no recorded cause — is called unknown loss or shrinkage. It's "unknown" because you don't know exactly where each unit went: only that it's missing. It isn't the expiry or the breakage you already wrote off — that's known loss — but the hole that appears when you count and the numbers don't come out right.
The point isn't to obsess over it, but to accept it exists and can be measured. A shop that doesn't measure it assumes "that's just how it is"; a shop that does measure it discovers that much of it can be clawed back by changing a few everyday things.
The three types of loss
Before you reach for fixes, it helps to know what you're up against. Loss almost always comes from three places, and each is tackled differently:
| Type | Where it comes from | How to fight it |
|---|---|---|
| External theft | Customers walking off with goods unpaid, especially small, valuable items | Sightlines, product placement, greeting whoever comes in |
| Internal loss | Slips and mistakes at the counter: wrong charges, wrong change, an uncontrolled till | Cash counts, traceability of sales and voids |
| Administrative errors | Miscounted deliveries, wrong labels, breakages never written off, bad prices | Orderly goods-in and always-current stock |
One important detail: a good chunk of "internal" and "administrative" loss isn't bad faith, it's normal human error at a busy counter. So the approach isn't to distrust your people, it's to build a system where mistakes are hard to make and easy to catch in time.
Practical (and cheap) measures against theft
Most of what really deters costs little or nothing. You don't need to armour-plate the shop; you need anyone walking in with bad intentions to feel they'll be seen:
Mind your sightlines
Position the counter so you can see the door and the aisles. Shelves that aren't too tall, no blind corners. What's in view gets stolen far less. A convex mirror in the tricky corner is cheap and covers the blind spot.
Greet everyone who comes in
A simple "morning, can I help?" is the cheapest anti-theft measure there is. Someone about to lift something hates feeling noticed; a real customer loves being looked after. You win both ways.
Protect small, high-value items
Batteries, blades, perfume, chargers, tobacco, cosmetics... small and pricey is the first to walk. Keep it near the till, behind the counter or in controlled displays. Don't leave it in the far aisle.
Keep the displayed stock tidy
A tidy shelf doesn't just sell more: it also shouts the moment something's missing. If the gap is obvious, you find out sooner. Clutter is the shoplifter's best friend.
Use cameras sensibly
Cameras keep getting cheaper and they deter, especially when visible and paired with a sign. But on their own they fix nothing: they're a complement to cash and stock control, not a substitute. Always follow your country's rules on CCTV and signage.
Cash control: where the most slips away by accident
The till is the most sensitive spot in any shop, and not always because of theft: wrong change, charging by eye and unrecorded sales throw the cash out just as much as a lift does. The fix is the same old habit: the cash count.
- Ring up every sale. Every charge goes through the POS, even the "it's only two quid" ones. What isn't recorded isn't controlled, and that's where discrepancies creep in.
- Count the till every day. Count the cash and compare it with what the system says. A small, one-off discrepancy is normal; one that always leans the same way is a signal to look at the process, not to accuse anyone.
- Control voids and refunds. They're necessary, but also the favourite gap for money to slip through. Logging them with a reason and a timestamp is the best way to keep them trouble-free.
- Keep a fixed float. Always start with the same amount of change. That way the count is a clean subtraction, not a guessing game.
How to spot discrepancies: theoretical stock vs real stock
This is the heart of it. To know whether you're losing product you need two numbers and a comparison:
- Theoretical stock: what your POS says you should have. Deliveries in, minus sales out.
- Real stock: what you physically count on the shelf.
If the system shows 20 units of a product and you count 16, there's a shrinkage of 4 to investigate. It could be theft, a miscounted delivery, a sale that never got rung up or a mislabel. You don't have to do a giant, exhausting yearly inventory: it's far more useful to do small, frequent counts, by category or focused on small high-value items, every few weeks. That way the discrepancy is caught while it's still recent and the cause can be traced.
How Bipe helps you protect your shop
This is where a modern POS saves you work and gives you visibility. Bipe doesn't stand guard for you, but it puts the numbers on the table so losses stop being invisible:
- Real-time stock control. Every sale deducts from inventory and every delivery adds to it, so your theoretical stock is always current to compare against the real count.
- Simple cash counts. Close the day, count the cash and instantly see whether it matches what you sold, broken down by payment method.
- Traceability of every sale. You know what sold, when and at what price. No phantom sales.
- Voids and refunds logged. Every correction is recorded with its reason and timestamp, so the favourite gap for discrepancies stops being one.
- Quick counts and inventory. Count by category or by product and the system itself flags the differences between what there should be and what there is.
It's not about distrusting anyone: it's about a tidy shop and clear numbers, which is exactly what stops loss growing in silence. Note: electronic invoicing and systems like Verifactu or TicketBAI are coming soon to Bipe; for now we're focused on making selling, balancing and controlling stock as simple as possible.
Stop losses from being invisible in your shop
With Bipe you keep stock current, count the till in a minute and see every sale and every void. Catch discrepancies in time and protect your margin. Try it free.
Try Bipe free →Frequently asked questions
What is unknown loss in a shop?
It's the gap between the stock you should have according to your records and what's actually on the shelf, with no recorded cause. It bundles external theft (customers), internal loss (mistakes and slips at the counter) and administrative errors (wrong labels, miscounted deliveries, breakages never written off). You don't know where each unit went, only that it's missing. That's why the first step is to measure it: without comparing theoretical stock against the real count, you don't even know how much you're losing.
How do I spot stock discrepancies?
By comparing theoretical stock (what your POS says you should have) with real stock (what you count on the shelf). Do small counts by category or focused on small, high-value items every few weeks, not one giant yearly inventory. If a product shows 20 and you find 16, that's a shrinkage of 4 units to investigate: it could be theft, a delivery miscount or a sale that never got rung up.
Are anti-theft measures expensive?
Most aren't. The strongest deterrents are cheap: good sightlines from the counter, clear aisles, a convex mirror in the blind corner, keeping small high-value items near the till and greeting everyone who walks in. Cameras help and keep getting cheaper, but on their own they fix nothing if you're not keeping control of the cash and the stock. Tidy management prevents more loss than any gadget.