How to Stop Liquor Theft and Peg Leakage in Your Bar

Every bar owner knows the feeling: sales look fine, the bar is busy, yet at the end of the month the liquor stock simply does not match. Bottles finish faster than the bills say they should. This gap is called peg leakage, and in most bars it happens quietly, one peg at a time.

The good news is that leakage is not a mystery. It comes from a small number of predictable places, and each one can be closed with a simple habit and the right numbers. This guide explains where liquor goes missing and how to stop it.

Where liquor stock actually goes missing

1. Over-pouring

A bartender who free-pours "a little extra" for regulars, or who does not use a measure, can turn a 750 ml bottle that should give 25 pegs of 30 ml into 21 or 22. No one is stealing on purpose, but the bar still loses three or four pegs on every bottle.

2. Drinks served without a bill

The most common form of liquor theft is simple: a drink is poured and served, cash is collected, and no bill is made. Because the bottle is shared across many drinks, a few missing pegs are hard to spot by looking at the shelf.

3. Cancelled or edited bills

A bill is made, the drink is served, the guest pays — and later the item is cancelled or the bill is reduced. The stock is gone, but the system shows no sale. Cancellations after payment are one of the strongest warning signs a bar can track.

4. Breakage and "spillage" that is never checked

Real breakage happens. But when broken or spilled bottles are written off without a photo, a signature or a manager check, the label "breakage" slowly becomes a convenient hiding place.

5. Receiving and storeroom gaps

Stock that arrives short from the supplier, cases moved between the storeroom and the bar without a record, and open bottles that are never counted all create gaps that only show up weeks later.

The one number every bar should know: system stock vs counted stock

If every peg sold reduces stock in your billing software, then at any moment the system knows how much of each brand should be on the shelf. When you count what is actually there, the difference is your leakage — in bottles, in pegs and in rupees.

This only works if three things are true:

• Every drink has a recipe. A 30 ml peg, a 60 ml large peg, a cocktail with two spirits — each must reduce the right brand by the right amount.
• Every purchase is entered. New stock from the supplier is added with the bill or TP number.
• You count regularly. A count once a month is too late. A quick count every night, or at least every week, catches problems while they are small.

How to do a fast bottle count (without wasting an hour)

Most bars avoid counting because it is slow. A good routine takes 10–15 minutes:

1. Count full bottles first. Sealed bottles are easy: just tap plus or minus for each brand.
2. Estimate open bottles in quarters. Mark each open bottle as ¼, ½ or ¾. You do not need laboratory precision — consistency matters more.
3. Do a blind count. The person counting should not see the system stock. When staff know the "expected" number, counts have a way of matching it.
4. Let the system do the maths. The difference between counted and expected stock should be shown per brand, in bottles, pegs and rupees, so the owner sees the problem at a glance.

Daily checks that stop leakage

• Review cancelled bills every morning. Pay special attention to bills cancelled after payment or after the drink was made, and note which staff member cancelled them.
• Compare top brands, not everything. Your five or six fastest-moving brands usually hide most of the leakage. Watch them closely.
• Use measures and train the team. A jigger costs very little compared to the pegs it saves.
• Make breakage visible. Every broken bottle gets a photo and a manager's approval before it is written off.
• Close the shift properly. When one shift hands over to the next, a quick count of the main brands makes each shift responsible for its own stock.

Keep your excise register in step

Bars also need to keep a brand-wise daily account of opening stock, receipts, sales and closing stock for excise. When stock, recipes and purchases are already in your software, this register can be produced automatically instead of being written by hand. Formats differ by state and licence type, so always confirm the exact format with your excise consultant.

How DUOZENT helps

DUOZENT was built for exactly this problem. Every peg billed reduces stock through recipes, the Bottle Count screen lets staff do a fast blind count on their phone, and the Leakage Report shows cancelled bills, stock shortages, wastage and unpaid bills with the staff name — every day. If you already use another billing software, you can upload its daily item-wise sales report and still get the stock and leakage reports.

Want to see where your bar is losing stock? Book a free demo and start your 14-day free trial with a free leakage report.