How to manage a pub cellar in 2026

Last updated: 26 June 2026

Most pub licensees think their cellar is under control until they actually measure it properly — and then they realise they’re bleeding between £3,000 and £5,000 a year without knowing why. A 1% stock loss on wet sales is almost invisible in your daily takings, but it adds up fast, and the fix isn’t complicated or expensive. The problem is that how to manage a pub cellar is rarely treated as a core operating skill; it’s either done badly or outsourced entirely to a brewery stocktaker who visits once a month and tells you what you already lost. You can stop that right now. This guide walks you through the exact cellar management system I built for my own pub — one that takes under two hours per week and tells you precisely where your money is going. You’ll learn what actually matters to measure, what equipment you genuinely need, and how to spot the real sources of loss: over-pouring spirits, line waste from poor temperature control, and forgotten wastage — not theft. Keep reading if you want your cellar to stop being a financial black hole.

Why Cellar Management Matters More Than You Think

Most pubs run on spreadsheets, guesswork, and hope when it comes to stock. Your EPOS tells you what sold. Your cellar tells you whether you actually made money on it. The difference between those two numbers is where your profit goes to die.

When I first took over my Marston’s pub, I was managing stock on a tangle of spreadsheets and still losing track of partial kegs and spirit measures. I had no idea whether the 2% variance I was seeing on paper was normal or a warning sign. I didn’t know which lines were losing money or whether my bar staff were pouring correctly. Most licensees in that position assume the brewery stocktaker will catch any problems — but they visit once a month and are counting what’s already gone. By then, the money is lost.

Here’s the real insight: most stock ‘theft’ is actually measurement error and forgotten wastage. Spirits hide losses in over-pouring (a free-poured 25ml is often 32–35ml). Draught hides it in poor cellar temperature, bad line cleaning waste, and beer left in lines at the end of a night. A keg you think is half-full might actually be three-quarters empty because you’ve never dipped it properly. And one forgotten bin of spillage per week becomes £500 a year of unrecorded loss.

The fix is to turn your cellar into a measurable system. I built a count routine around a dipstick and a set of scales, and the weekly variance went from guesswork to a number I could trust within a fortnight. Within two months, I clawed back 1–2 GP points just by being able to say: “This draught line is losing 15 pints a week to temperature problems” or “Spirits are going out at 28ml, not 25ml.” That’s money back on the bar.

The Weekly Line Check: Your First Defence Against Loss

A weekly line check is non-negotiable if you want to know what’s happening in your cellar. It takes 90 minutes to two hours once a week, and it’s the only data point that matters. Not monthly. Not when the brewery visits. Weekly.

Here’s the process:

• Dip every cask and partial keg. Use a marked dipstick to measure the liquid level, record the date and time, and note the temperature. A cask that was 60% full on Monday and 40% full on Friday is fine. A cask that’s been stuck at 40% for three weeks is a red flag — either the line is blocked or the pour-weight is wrong.
• Weigh every open spirit bottle. Record the weight and date. Spirits are where over-pouring happens fastest because it’s invisible — a 25ml measure that’s actually 32ml costs you 28% margin on that drink. Scales don’t lie. Weighing takes 10 minutes per night and removes all argument.
• Count stock movements. Tally new kegs and bottles received, note any stock written off as wastage (spillage, breakage, line purge), and cross-reference against your delivery notes.
• Log temperatures. Draught beer should sit between 50–54°F (10–12°C). Warm cellars waste beer and damage quality. Cold cellars are expensive to run. A thermometer on the wall takes 10 seconds to read and tells you whether you’re losing money to temperature.
• Reconcile to till the same day. Pull your till report for that week and compare what you counted to what your EPOS says sold. A variance of 1–2% is normal. Anything above 3% needs investigation that week, not next month.

I’ve seen licensees say “I don’t have time for a weekly count.” I get it. But you have time to wonder why your GP is down or time to argue with your area manager about stock losses. A StockTap pub stock app lets you log counts on your phone as you go, so it takes less time than writing it down and transferring it to a spreadsheet later. The time investment is small. The financial return is huge.

Essential Cellar Equipment and Why It Works

You don’t need much to run a tight cellar. You need the right things, used correctly, every week.

• A dipstick. A marked wooden or plastic stick that shows the liquid level in a cask. Cost: £5–£10. A dipstick tells you the volume remaining in a cask without having to guess or move it. Make sure the marks match your cask size (a 36-pint cask has different intervals to a 50-pint). No guessing. No assumptions.
• Kitchen scales (2kg or 5kg capacity). Cost: £15–£30. Weigh open bottles of spirit weekly to catch over-pouring. A sealed bottle should lose weight equal to the number of pours at the correct measure. If a bottle that was 850g on Monday is 620g on Friday, you poured 23 drinks. If your till shows 28 spirit sales that week, someone is over-pouring or the measure is wrong.
• A cellar thermometer. Cost: £10–£20. Stick it on the cellar wall and read it every count. Warm cellars accelerate line waste and beer spoilage. Cold cellars cost money to run and can affect flavour.
• A notebook or a counting app. Pen and paper works. So does SmartPubTools on your phone. The medium doesn’t matter — consistency matters. Same time, same day, every week.

That’s it. You don’t need expensive software or brewery-grade monitors. You need discipline. Most pubs that move from a messy spreadsheet to a disciplined count claw back 1–2 GP points within a couple of months — and that’s just from being able to measure what’s actually happening.

Temperature, Cleaning and Line Waste

Line waste is the silent profit killer in most cellars. A line that’s poorly cleaned, run at the wrong temperature, or has debris in it will leak beer, pour slowly, or taste off. Your customers will drink less, complain more, or switch to bottles. Your stock variance will be high. And you’ll blame spillage when the real problem is your cellar setup.

Draught beer hides losses in poor cellar temperature and bad line cleaning waste; keeping your cellar between 50–54°F and cleaning lines weekly will catch and prevent most of it.

Here’s what actually happens:

• Temperature too warm (above 55°F): Beer oxidises faster, foaming increases (which means more spillage at the bar and in the line), flavour changes, and you pour more waste trying to get a clean pint. A warm cellar costs you 2–4% of your draught volume just in waste.
• Temperature too cold (below 50°F): Gas consumption increases (and so does your cellar cost), and pints take longer to pour. Slower pour = angry customers = staff adjusting regulators = more waste.
• Line cleaning: Lines should be cleaned weekly with line cleaner (caustic or acid depending on your system). Dirty lines trap bacteria, cause blockages, and force staff to pour waste trying to flush the system. If your lines aren’t cleaned every week, assume 5–10% of your draught volume is going down the drain as waste or sitting in pipes.

When I tightened my cellar temperature to 51°F and implemented a proper weekly line clean routine, my draught variance dropped from 6% to 2% within a month. That’s real money. Most licensees blame spillage or theft for that 4% difference. The truth is simpler: the cellar conditions were working against them.

Reconciling Stock to Till Data

Your count means nothing if it doesn’t match your till. That’s where the real picture emerges.

Every Friday (or whenever you do your count), pull a till report that covers the exact same period. Compare units sold on the till to the stock movement you counted. For example:

• Cask A: 40 pints sold per till = 40 pints gone from count. ✓
• Cask B: 35 pints sold per till = 42 pints gone from count. Variance 7 pints = 17% loss. Flag it.
• Spirit line: 28 drinks sold per till = bottle lost 28 measures of weight. ✓

That variance tells you whether the problem is over-pouring (too much liquid leaving per sale), spillage (losses not recorded on the till), or a stuck cask that’s being diluted by the next keg. You can then investigate: Is the line pressure too high? Is the measure worn? Is there a blockage? Are staff pouring double measures? The data points you to the real problem — and then you fix it.

The number that actually matters is wet GP by line, not a single headline stock figure. If your draught is +2% and your spirits are –3%, you know exactly where to look. If your headline stock is –1%, you know nothing.

Common Cellar Management Mistakes

Mistake 1: Relying on monthly brewery stocktakes

The brewery stocktaker will give you an accurate count of what’s left in your cellar. They won’t tell you where the loss happened or how to stop it. By the time they visit, a full month of over-pouring, line waste, and forgotten spillage is already gone. You’re managing backwards. Weekly counts let you manage forwards — spotting problems before they cost you a week’s profit.

Mistake 2: Counting but not reconciling to till

A count that doesn’t match your till data is just a number. It doesn’t tell you anything. You need to know: Did the till record what left the cellar? If not, why? That’s where the real investigation starts.

Mistake 3: Assuming variance is normal

Some variance is normal (1–2% is fine). But a line with 5% variance week after week is not normal — it’s either a measurement problem, an over-pouring problem, or a line problem. Don’t let it slide. Most licensees spot the issue after 4–6 weeks of weekly counts and fix it in a day.

Mistake 4: Not recording wastage as it happens

A pint spilled at the bar, a bottle of wine dropped in the cellar, a line purge before service — these are real losses, but only if you record them. If your staff don’t log wastage, your stock count will be wildly out. Make wastage recording part of the close-down routine. One minute of admin saves hours of chasing variances.

Mistake 5: Using spreadsheets and forgetting to check them

A spreadsheet is a grave for data. You enter the numbers, file it away, and only remember it exists when the area manager asks about your stock variance. Use it if you must, but actually look at it every week. Better: use a system that flags variances automatically, so you spot trends before they become crises.