Understanding restaurant profitability in three figures

A restaurant can post impressive sales and still earn nothing. Profitability isn't something you read off the till; you read it in what's left once every cost has been paid. That's the difference between a full dining room and a profitable one.

Three indicators are enough to diagnose the financial health of a business. The first is gross margin, meaning what remains after food and drink purchases. The second is the labour ratio. The third is the weight of fixed overheads, rent above all.

Together these three items typically absorb more than 80% of a standard restaurant's revenue. Everything else in day-to-day management comes down to watching them month after month. A single point of drift on food cost rarely shows up day to day, but it shows up in the year-end accounts.

What makes the restaurant industry hard is how thin the bottom line is. Out of every £100 taken, an operator often keeps between 3 and 10 before tax. Put differently, a 2-point error on food and beverage costs can wipe out a third of the profit.

Restaurant costs: fixed, variable and cost of goods

Before any calculation, you need to sort your outgoings. The split between fixed costs and variable costs underpins everything that follows, starting with the break-even point.

Fixed costs

These land whether the room is full or empty: rent, insurance, software subscriptions, the accountant, loan repayments, part of your energy bill and the payroll of permanent contracts. They are the costs that force you to open the doors.

Rent above 10% of turnover is a warning sign in most concepts. Beyond that, the slightest dip in trade becomes painful, because nothing adjusts downwards.

Variable costs

Variable costs track the number of covers served: food and drink purchases, takeaway packaging, delivery platform commissions, extra weekend cover, laundry. The more you sell, the higher they go, which is exactly as it should be.

Cost of goods: 25 to 35% of net turnover depending on the style of menu
Labour, including on-costs: 30 to 40% for table service
Rent and service charges: 6 to 10%
Energy, maintenance, insurance, sundries: 8 to 12%
Platform commissions, where they apply: 20 to 30% of the sales concerned

The cost of goods ratio, or food cost

Food cost measures the weight of food purchases against sales. The formula is: (opening stock + purchases − closing stock) ÷ net turnover × 100. Tracking it by product family rather than as a single global figure changes everything: meat and fish drift far faster than drinks.

Liquids pull the margin upwards. A £2.50 coffee costs a few pence, and a bottle of wine often sells for three times its purchase price. That's why two businesses with identical kitchen food costs can post very different gross results.

Calculating restaurant profitability: the indicators to track

Working out a restaurant's profitability happens on three levels. Each answers a different question and needs monitoring at a different frequency.

Gross margin

Net turnover minus cost of goods. This is the first level, the one the kitchen controls. A 70% gross margin means a dish sold at £20 uses £6 of product. Review it monthly, and ideally weekly on the sensitive product families.

Contribution margin and operating profit

Next you deduct variable labour and direct costs. What's left has to cover your fixed costs. Whatever survives that is your operating profit, the real measure of performance.

Net margin

Net margin expresses net profit as a share of turnover. In commercial restaurants it commonly sits between 3 and 10%. Above 12%, you're looking at either a very tightly run operation or a low-service concept.

Average spend and number of covers

Two levers, one equation: turnover = average spend × number of covers × trading days. Adding £1.50 to your average spend across 40 covers a day, 300 days a year, is £18,000 of extra sales — almost all of it margin, provided fixed costs stay put.

Item	Typical range (% of net turnover)	What it tells you
Cost of goods (food cost)	25 to 35%	Above 35%, revisit your recipe costings, portions and suppliers
Total payroll cost	30 to 40%	Above 42%, the rota doesn't match footfall
Rent and service charges	6 to 10%	Beyond 12%, the location is eating your margin
Other overheads	8 to 12%	Energy, insurance, maintenance, subscriptions
Net profit	3 to 10%	The comfort zone starts around 8%

These figures are orders of magnitude, not rules. A wine bar, a pizzeria and a fine-dining restaurant share neither the same cost structure nor the same rhythm. The point is to compare your business with itself, month after month.

Restaurant break-even point: the calculation and a worked example

Your break-even point is the level of turnover at which you stop losing money. Below it, every service digs the hole deeper. Calculating a restaurant's break-even takes one line: fixed costs ÷ contribution margin rate.

A worked example

Take a business with £96,000 of annual fixed costs and a contribution margin rate of 60%. Its break-even is 96,000 ÷ 0.60 = £160,000 of net turnover. Across 300 trading days, that's roughly £533 to take every day.

With an average spend of £22, you therefore need to serve 24 covers a day to break even. The 25th cover is where profit starts. That tipping point is the number to know by heart.

Profitability of a 30-cover restaurant

A 30-seat restaurant generally runs two full services, lunch and dinner, which means 45 to 60 covers a day when trading well. At an average spend of £25, that's between £340,000 and £450,000 of annual turnover. How profitable it ends up being will depend above all on how well the evenings fill.

Turnover of a 50-cover restaurant

This question comes up often. A 50-seat room, with 1.5 sittings per service and a £24 average spend, lands somewhere around £500,000 to £700,000 net a year. Plenty of operators overestimate their sittings: assuming two full services every single day is the single most common piece of business-plan optimism.

Most restaurants that close weren't short of customers. They were short of 3 points of margin, every month, for two years.

If you're putting a project together, run these assumptions before you sign a lease. Our guide to the structure and key figures of a restaurant business plan sets out the items to budget for and the most common forecasting mistakes. A well-built spreadsheet beats any online profitability calculator.

Which type of restaurant is the most profitable?

No concept wins outright, but some business models are far more forgiving of mistakes than others.

The traditional restaurant

Profitability in a traditional restaurant rests on the balance between a short menu and steady footfall. Food cost around 30%, payroll around 35%, net margin often between 5 and 8%. The model is solid but inflexible: you need lunchtime volume.

Pizzeria, crêperie, salad bar

On paper these are the most comfortable businesses to run. Cost of goods around 22 to 28%, a small kitchen team, fast turnover. The trade-off is a low average spend and crowded competition, which forces you to generate high turnover per square metre.

The brasserie

A brasserie's strength is drink. When liquids make up 30% of sales, gross margin is mechanically pulled towards 72 or 75%. On the other hand, long opening hours weigh heavily on labour costs.

Fine dining

A Michelin-starred restaurant works with expensive produce and large teams. Net margin there is often lower than in a neighbourhood pizzeria, despite three-figure bills. Profitability comes from what sits around the plate: wine pairings, private hire, reputation, side activities.

Improving profitability: the levers that actually move the needle

To improve profitability, it's better to tackle a few things properly than many things loosely. Here are the various projects in the order that pays back fastest.

Rework your recipe costings

Every dish needs a food cost calculated to the gram. Without it, you can't work out a margin, set a price, or analyse what's dragging the result down. It's the least enjoyable job and the most profitable one.

Cut waste and losses

Waste accounts for 5 to 10% of purchases in a poorly organised kitchen. Weekly stocktakes, first-in-first-out stock rotation, weighed portions, sensible use of trimmings: these habits can bring food cost down by 2 to 3 points in a quarter.

Rank your dishes on two axes: popularity and margin. Push the ones that are both popular and profitable, rework the popular but low-margin ones, and drop the rest. A well-chosen 12-dish menu matters more to the bottom line than a menu of 30.

Remove dishes that sell fewer than 3 times a week
Put your high-margin items at the top of each section, where the eye lands
Always suggest a drink and a dessert: it's the best way to lift the average spend
Check your prices are legible and up to date everywhere, in the room and in the window

Match the rota to footfall

Each week, compare hours worked against turnover, service by service. Most payroll overruns come from two or three overstaffed slots, never from the rota as a whole.

A menu frozen on paper stops you reacting. Moving to a digital menu accessible by QR code lets you change a price that same morning, pull a dish that's run out and push high-margin items depending on the service. You also do away with reprints — a quiet but recurring cost.

It's also the simplest way to stay compliant with price display rules in restaurants when you change your offer often. Two problems solved at once, at no extra cost.

Working out whether a restaurant project will be profitable

Before opening, the question isn't "how much will I take" but "how much do I need to take". Redo the break-even calculation with your real fixed costs and a cautious margin rate, then convert it into covers per day. If the number exceeds the physical capacity of the room, the project isn't viable as it stands.

On investment, budget between £1,000 and £2,500 per square metre for a full fit-out, excluding lease premium and goodwill. Add three months of cash reserve: building up to full trade rarely takes less than a year.

Finally, watch your numbers from month one. Food cost, labour ratio, average spend, covers per service. Four figures, one table, a weekly review: that's what separates operators who can correct course from those who discover the problem in the year-end accounts. Other articles on margin levers in hospitality take these benchmarks item by item.

Restaurant profitability: margins, ratios and benchmark figures