Gross Profit & Where Profit Goes: Common Questions

Straight answers on how gross profit actually works, and the operational causes behind most GP loss in restaurants, pubs, and hotels.

Gross Profit

How do I calculate my food or beverage GP?

The formula is straightforward.

Opening Stock plus Purchases minus Closing Stock equals Cost of Sale.

Net Sales minus Cost of Sale equals Gross Profit in pounds.

Gross Profit divided by Net Sales, multiplied by 100, equals Gross Profit as a percentage.

If you have your beverage cost of sales at £8,000 and your net beverage revenue is £24,000, you will have made £16,000 in gross profit. £16,000 as a percentage of £24,000 is 66.7%.

The challenge is not the calculation. It is ensuring the inputs, stock counts, purchase records, and sales data, are accurate. Inaccurate inputs produce a figure that looks meaningful but tells you nothing useful.

What is a good beverage gross profit margin for a bar or pub in the UK?

A well-run bar or pub should typically achieve a beverage GP of between 65% and 72%, depending on the sales mix. Draught beer tends to generate lower margins than spirits, cocktails, and soft drinks.

If your overall GP is consistently falling below 60%, there are almost certainly operational issues such as overpouring, wastage, poor stock controls, or unrecorded transactions.

A healthy margin is achievable. The challenge is sustaining it consistently, and that requires daily monitoring rather than a monthly review.

What is a good food gross profit margin for a restaurant?

Most restaurants target a food GP of between 60% and 70%, though this varies by cuisine type, service format, and price point. A fine dining restaurant may achieve 70% or above, while a high-volume casual dining operation may sit closer to 60 to 65%.

A 3% creep in food cost percentage can erase the entire net profit of a venue. If your food GP is regularly underperforming against your theoretical margin, the culprit is usually over-portioning, menu costing that has not kept pace with ingredient price increases, or poor stock management.

What is the difference between actual and theoretical gross profit?

Your theoretical GP is what you should be achieving based on your menu costings and the volume of products sold.

Your actual GP is what you are genuinely achieving once stock variances, waste, overpouring, and unrecorded sales are taken into account.

The gap between the two is where your missing profit is going.

A gap of 1 to 2% may be acceptable. Anything above that warrants investigation, and the investigation needs to go beyond the numbers. It needs to identify the operational cause.

Theoretical GP is only meaningful if your recipes are costed accurately. If they are outdated, you will have no reliable baseline to measure against.

What is an acceptable stock variance in hospitality?

There is no universal figure. It depends on the site and how it is run.

The more useful question is not what is acceptable but whether it is consistent. A small variance that moves around month to month is usually noise; false variances will correct themselves over time.

A variance that repeats at the same level every month is systematic. That is a pattern, and patterns have a source. A recurring variance, however small, is worth recovering because it compounds.

A spirits variance of 9% on one product line can add up pretty swiftly and run into hundreds of pounds. Scale that across a full spirits range and the number becomes significant fast.

How does my sales mix affect gross profit?

Your sales mix is the combination of products you sell, and it has a direct impact on your GP.

Different products carry different margins. A shift toward lower-margin products will pull your overall GP down even if your controls are perfect and nothing has changed operationally.

This is why GP should always be monitored alongside sales mix data. If your GP drops but your mix has shifted toward draught beer and away from spirits, that explains the movement. If your mix is unchanged and GP has still dropped, the answer is in the operation; product variances will also back this up.

Monitoring both together gives you the full picture. Monitoring GP in isolation gives you half of it.

Why is my restaurant making good sales but low profit?

This is one of the most common problems in hospitality, and the answer is almost always the same: hidden operational leakage.

Your revenue can look really healthy while the operation loses money daily through overpouring, weak delivery controls, portion drift, theft, and untracked waste. None of these show up clearly on their own. Together they erode margin consistently and quietly.

A busy operation is not the same as a profitable one. Daily checks of all of the above act as a deterrent and also maintain focus, keeping your margin in check.

Where Profit Goes

What are the most common causes of GP loss in a hospitality business?

GP loss in hospitality rarely comes from one place. It is almost always a combination of factors operating simultaneously, each individually manageable, collectively significant.

The most common causes are overpouring and free-pouring at the bar, portion drift in the kitchen, loose goods receiving with no checks against the purchase order or delivery note, stock losses that get reported but never followed up on, untracked waste, cash that does not reconcile, and menu pricing that has not kept pace with ingredient cost increases.

None of these are inevitable. All of them are controllable.

The starting point is always the same: daily measurement of what is happening, build the data, and act on what it tells you.

How does overpouring affect my bar margin?

Overpouring is one of the most common and most expensive causes of bar GP loss.

A 25ml spirit served at 35ml gives away 40% extra stock on every pour. Across a busy bar, across every shift, that compounds fast. A venue with high cocktail sales is particularly susceptible to this.

Even a small consistent overpour, half a measure on every spirit, can add up to thousands of pounds a year on a single product line. The fix is straightforward: standardise pour sizes, remove free-pouring where it is costing you, use measured pourers, train the team, and line check regularly.

If your bar GP is slipping and you cannot identify a clear cause, overpouring is the first place to look.

How does poor goods receiving lead to stock loss?

Every short delivery that goes unchallenged is a direct cost to your business.

A supplier delivering 23 cases when the invoice says 24, signed off without checking, means you have paid for stock you never received.

The correct approach is three-way verification. Every stock item delivered is checked against the purchase order, the purchase order is then checked to the vendor invoice, with any shortages registered on the delivery note or invoice and the supplier notified by phone on the day.

Unchecked short deliveries can add up to a significant annual loss. If your premises are seen to be a soft touch in this area, it will be taken advantage of.

How does portion drift affect food GP?

Portion drift happens when the gap between your standard recipe specification and what is actually being served widens over time. It is rarely deliberate; it is usually the result of insufficient training, no documented portion specs, or no regular checks against standard.

A protein portion running 20g over spec on every plate, across 200 covers a day, five days a week, adds up to significant food cost overrun very quickly.

The fix requires documented portion specifications, regular weight checks during service, measuring tools for portioning, and management oversight of what is leaving the kitchen pass.

How does waste impact profitability and how should it be managed?

Waste is unavoidable in any hospitality operation. The issue is not that waste exists, it is that most businesses do not measure it accurately or consistently.

Waste should be logged in real time, not estimated at the end of a period. It should be categorised: spoilage, preparation waste, cooking waste, plate waste, bar wastage, and allowances. To operate efficiently, wastage shouldn't exceed 5% of total stock usage.

When you compare recorded waste against your stock variance, the gap between the two tells you whether your losses are accounted for or whether something else is going on.

If your variance consistently exceeds your recorded waste, the unaccounted difference is where the investigation needs to focus.

Wastage sheets should also be reviewed daily with actions taken to address any issues

highlighted. For instance, if croissants are burnt every Tuesday when a particular member of staff is in the kitchen, there is an obvious training issue that needs addressing.

How does theft show up in a hospitality business?

Theft in hospitality rarely announces itself clearly. It shows up as unexplained losses, cash shortages in the till, or a GP that consistently underperforms without an obvious operational cause.

It can come from multiple directions: short deliveries from suppliers, cash taken at the point of sale and pocketed rather than registered in the POS, stock removed without a transaction, or voids and discounts used to cover cash extraction.

The industry estimate is that approximately 7% of annual sales are lost to internal theft, and the median time to discover occupational fraud without controls in place is 18 months. Theft is generally not the result of a full-time thief; it is usually the result of lax controls presenting opportunities to otherwise honest team members.

The most effective deterrent is not suspicion. It is tight controls that remove the opportunity. When the gap between what should be there and what is there is measured accurately and consistently, dishonesty has nowhere to hide.

How does invoice fraud affect a hospitality business?

Invoice fraud is more common than most operators realise. It includes short deliveries billed at full quantity, duplicate invoices from the same supplier, price increases applied without notification, and, in more serious cases, invoices from fictitious suppliers.

The defence is consistent three-way verification. Every invoice is matched against the original purchase order and the physical delivery note or invoice before payment is approved.

Statement-to-invoice reconciliation should be carried out monthly. Anyone with authority to approve payments should not also have sole control of the ordering and receiving process.

If you're experiencing issues with your margins, one site or a hundred, I can help. Book a Profit Review for a straight conversation about your operation and where the gaps might be.