Train bar staff on stock control

Last updated: 26 June 2026

Most pubs aren’t losing stock to theft — they’re losing it to measurement error and forgotten wastage that nobody ever trained anyone to track. A 1% stock loss on wet sales quietly costs a typical pub £3,000–£5,000 a year, and a proper weekly line check catches it before it becomes a problem. Yet I’d estimate fewer than one in five UK pubs have their bar staff trained to do a dip, read a scale, or reconcile till data against a physical count the same day. If your team can’t measure what they’ve sold or used, you’re flying blind on one of your biggest profit lines. This article shows you exactly how to train bar staff on stock control — not as a one-off lecture, but as a repeatable routine that takes 20 minutes a week and keeps variance to a number you can trust.

Why bar staff stock control training matters

The most effective way to protect pub profit margins is to train bar staff to measure stock accurately every single week, because untracked wastage and measurement error cost more than actual theft. I spent five years running stock on a tangle of spreadsheets and still losing track of partial kegs and spirit measures. My variance report looked like a confession — I’d lose 2%, then 1.5%, then 3% the next week. I had no idea if it was staff, wastage, or just bad counting. The day I stopped guessing and started training my team on a proper count routine, the variance went from guesswork to a number I could trust within a fortnight.

Here’s the reality: spirits hide losses in over-pouring (a free-poured 25ml is often 32–35ml), draught hides it in poor cellar temperature and bad line cleaning waste, and most stock ‘theft’ is actually measurement error and forgotten wastage. If your bar staff don’t know how to dip a cask, read a scale, or fill in a line check sheet, you’re not running stock control — you’re guessing and hoping.

The financial case is straightforward. A 1% loss on wet sales is real money — and most untrained teams bleed it quietly every single week. Move from a messy spreadsheet to a disciplined count, and most pubs claw back 1–2 gross profit points within a couple of months. That’s not revenue growth. That’s lost money you’re recovering just by measuring properly.

Training bar staff on stock control isn’t a compliance exercise or something your brewery stocktaker should do for you. It’s your responsibility as a manager, and it’s the fastest way to improve your bottom line without changing a single thing about your business model.

The three tools every trained bar person needs

You don’t need software or a smartphone app to train your staff on basic stock control. You need three physical tools and clear instructions on how to use them.

1. A dipstick

A dipstick measures the depth of liquid in a cask or keg. It’s a metal ruler with calibrated markings that correspond to volume. When you dip a barrel, you get a number — 50 litres, 30 litres, whatever — and you record it. No guessing, no holding the cask up to the light. Your staff should dip every cask and partial keg in the cellar at the same time every week, write down the number, and you reconcile it against what your till says was poured. A dipstick costs £12–£25, lasts forever, and removes all subjective measurement from the process.

Train your staff on the correct angle (straight down, not at an angle), how to read the marking, and which casks get dipped first (always the oldest stock, always the same order). Consistency is everything. If one person dips Monday and another dips Thursday, you’ll have variance that’s meaningless.

2. Scales (for open bottles)

Open spirit bottles are impossible to dip. You measure them by weight. A £15 digital kitchen scale is all you need. Weigh the bottle as-is, record the weight, and the following week you know exactly how much was poured. A full 70cl bottle of 40% spirit weighs roughly 820 grams. A half-empty bottle weighs less. The maths is simple, and the result is accurate to within a few millilitres.

Train your staff to:

• Place the empty glass on the scale first (tare it to zero)
• Weigh the full bottle at the start of the week
• Weigh it again at the same time the following week
• Record both numbers, every time, with no exceptions

This single step catches over-pouring faster than anything else. Most bar staff don’t realise they’re free-pouring at 32–35ml when they should be at 25ml. Scales make that invisible loss visible within days.

3. A till reconciliation sheet

Your EPOS tells you what sold. Your stock count tells you what you had. The gap is your variance. On the day you do your weekly count, print off your till report for that exact week, and reconcile it against your physical dips and scales. If till says you poured 80 pints of Guinness and your dip says you used 60 litres (roughly 85 pints), you’re in the normal range. If till says 80 pints and your dip says 40 litres, you have a problem to investigate.

A simple spreadsheet works. A printed sheet on a clipboard works. StockTap pub stock app does all three at once, with till data built in. The method matters less than the discipline. Same time, every week, no exceptions.

Step-by-step training routine for your team

Training staff on stock control isn’t a one-hour induction. It’s a hands-on routine they learn by doing, with you watching the first three times. Here’s how to roll it out:

Week 1: Introduction and observation

Show your key staff member (start with one person — usually your head barman or supervisor) what you’re doing and why. Take them into the cellar with a dipstick. Pick a cask. Show them the correct angle, how to read the marking, and where to write the number. Do three casks together. Then let them do the next three while you watch. Don’t correct them unless they’re genuinely wrong; mostly just be present and ask questions: “What marking do you see?” “What’s that tell you about usage?” Make it a conversation, not a lecture.

Do the same with the scales. Weigh a spirit bottle together. Show them how the glass needs to be tared first. Do it twice. Let them do the next one.

Explain the till reconciliation: “This is what we sold according to the till. This is what we actually used according to the count. If they match, we’re good. If they’re wildly different, something’s wrong — either we measured wrong, or someone’s not ringing things through properly.”

The whole thing takes 30 minutes. That’s one session. Don’t overload them with information.

Week 2: Independent count with supervision

Your trained staff member now does the full count — dips, scales, till reconciliation — while you’re nearby but not directing them. Let them make small errors (they will). If they dip at a stupid angle and get a wild number, you’ll see it in the reconciliation, and that’s the teaching moment. “That dip came out at 15 litres but till says we poured 35 pints. Let’s re-dip that cask together and see what we get.”

This is where learning actually happens. Data errors teach faster than lectures.

Week 3: Full independence and sign-off

Your trained staff member does the count unsupervised. You review the numbers afterwards. If variance is within 1–2%, they’re trained. If it’s wild, you’ve identified that either they’re not doing it right or you have a genuine stock problem. Either way, you now have the data to investigate.

Once your first person is reliable, train the next. Don’t try to train your whole team at once. Train in sequence, always with someone experienced supervising the first three runs.

The weekly count schedule

Bar staff stock control training only works if the count happens the same day every single week, because variance only becomes meaningful when it’s measured against a consistent baseline. Pick a quiet shift — Tuesday afternoon, Sunday morning, whatever’s slowest in your pub — and do your count then. That’s the day the dipstick comes out, the scales get used, and the till report gets printed. Make it a non-negotiable part of the week, like taking bins out or checking the till float.

Create a one-page checklist that goes on the cellar wall:

• Dip every cask and keg in the same order
• Weigh every open spirit bottle
• Record all numbers on the sheet (date, time, person’s initials)
• Print till report for that week
• Calculate variance
• Sign and date when done

Keep the checklist visible and simple. Staff will follow a printed checklist more reliably than instructions locked in a document somewhere.

Common training mistakes and how to avoid them

Mistake 1: Training too many people at once

I’ve seen managers try to train their whole shift team in an afternoon. It doesn’t work. You can’t supervise six people doing dips simultaneously, and you can’t answer five different questions about scales at the same time. Train one person well. Then that person helps train the second. Then the second helps train the third. It takes longer, but it sticks.

Mistake 2: Not reconciling till data on the same day

If you dip on Tuesday and don’t look at your till report until Thursday, you’ve lost the link between the action and the data. If there’s a problem, you can’t trace it. Count and reconcile on the same day, every time. If till says 50 pints and dip says 40 litres, investigate that day while the shift is still fresh in people’s minds.

Mistake 3: Treating stock control as a chore instead of a business practice

If you act like the count is something you have to do because your brewery told you to, your staff will treat it as busywork. If you treat it like a serious measure of profitability — which it is — they’ll take it seriously too. Talk about the numbers. Show them when a line is leaking profit. Help them understand what a 2% variance actually costs you. Make it real for them.

Mistake 4: Not documenting anything

If you don’t write down the numbers, you have no data to review, no trend to spot, and no evidence if you need to have a conversation with staff about loss. Buy a notebook or use a spreadsheet. Record every count, every reconciliation, every variance. You’re building a baseline so you can spot when something’s actually wrong versus normal fluctuation.

Making stock control stick week after week

The hardest part isn’t training staff to do a count. It’s getting them to do it consistently, week after week, when nothing feels urgent and the cash register still opens at the end of the day.

Embed it into the roster

Write the weekly count into the shift pattern for your assigned staff member. “Tuesday 2pm stock count — 20 minutes.” It’s part of their shift, not an add-on. If it’s not in the schedule, it won’t happen.

Review the numbers together

Once a month, take your count data and sit down with your trained staff member. “Here’s what we counted. Here’s what variance we had. Here’s what that means in pounds.” If you ignore the data, they’ll ignore the count. If you show them it matters, they’ll keep doing it properly.

Solve problems when they appear

If a line shows unexpected loss, investigate with your staff, not at them. “The Carlsberg variance was 5% last week. That’s high. Let me check the line temperature and we’ll dip it again.” Make it a joint problem-solving exercise, not an accusation. Most of the time it’s a cellar issue or a measurement error, not theft. Treat it that way.

Use the number that actually matters

The number that actually matters is wet GP by line, not a single headline stock figure. If your draught loss is running 2% but draught is 65% of your sales, that’s a much bigger problem than a 4% loss on spirits which are 15% of sales. Train your staff to understand the weight of different lines, and focus your counting discipline on the big-money categories first.

When to involve your brewery stocktaker

Your brewery stocktaker should not be your first line of stock control. They’re a checkpoint, not the system. If you’re relying on them to tell you whether you have a problem, you’re already six weeks behind. Do your own count every week. Use brewery stocktakes (usually monthly or quarterly) to validate your counting method and catch things you’ve missed.

Tell your brewery stocktaker what you’re doing. Show them your dips, your scales, your reconciliation sheet. A good stocktaker will respect the fact that you’re managing your own line and will use their visit to check your accuracy, not to take over the job. A brewery that insists you can’t do your own count and must wait for them to come in is a brewery that doesn’t want you to know your numbers. That’s a red flag worth remembering.

Once your staff are trained and your routine is solid, your internal weekly count becomes the baseline and your brewery stocktake becomes the quality check. You know your pub better than anyone. Act like it.