Food cost is often treated as a monthly finance task. It should not be.

For an independent restaurant, a five-minute check on one dish can show whether your menu price, portion and supplier cost are still working. It can also reveal why sales are growing while cash is not.

The first number to check is simple:

Are you calculating food cost from the price the customer pays, or from the money your restaurant actually keeps?

If a dish sells for £12 including VAT, the net sale at the standard 20% VAT rate is £10. A £3 ingredient cost is therefore 30% food cost, not 25%.

That single mistake can understate food cost by five percentage points. On a dish with a higher cost, the difference can be six points or more. Across a menu, that quietly reduces your gross profit.

This matters more in September 2026. Food inflation is heading towards 9% in some industry warnings, with proteins, cooking oils, dairy and imported ingredients moving faster than the headline figure. The Food and Drink Federation’s latest forecast and warning shows why yesterday’s recipe card may no longer reflect today’s margin.

Labour is another pressure point. The National Living Wage is now £12.71 per hour. But this guide stays focused on food cost.

Here is a practical five-minute routine you can use on Monday.

1. Start with one dish

Do not begin by costing the whole menu.

Choose your best seller. It may be the dish that appears on almost every table, the one your team recommends most often, or the item that drives the most takeaway orders.

Popularity does not guarantee profitability. A dish can sell well and still damage your margin if its portion has drifted, its ingredients have increased in price, or its recipe includes more extras than you have costed.

Start with one dish. Find the friction. Then work through the rest of the menu.

2. Strip VAT from the selling price

Take the menu price customers see and convert it to the net selling price.

For a standard-rated dish at 20% VAT:

Net selling price = menu price including VAT ÷ 1.2

For a £12 dish:

£12 ÷ 1.2 = £10 net selling price

Do not simply subtract 20% from £12. That gives £9.60, which is incorrect. VAT is calculated as a proportion of the net price, so the correct method is to divide by 1.2.

This is the point where many menu calculations go wrong. Owners look at the £12 on the menu, then divide the £3 ingredient cost by £12:

£3 ÷ £12 = 25%

That makes the dish appear healthier than it is.

The correct calculation is:

£3 ÷ £10 = 30%

VAT is collected from the customer and paid to HMRC. It is not restaurant revenue.

Price from the net figure. Not the headline figure.

If your dish has a different VAT treatment, check the correct rate before calculating. The example above is for a standard-rated sale at 20%.

3. Cost the whole plate from current invoices

Now calculate what the dish actually costs to produce.

Use the latest supplier invoices rather than memory. Rice, oil and protein prices move. So do dairy, imported ingredients, packaging and small items that are easy to overlook.

Include:

• Main protein or primary ingredient
• Rice, noodles, chips, bread or other sides
• Cooking oil
• Sauce and stock
• Garnish and herbs
• Butter, dairy or finishing ingredients
• Disposable packaging for takeaway and delivery
• Any included dip, condiment or small extra

A dish that looks like a £3 plate may cost £3.30 once the oil, garnish, sauce and packaging are included.

That difference matters.

Account for yield and trim

What you buy is not always what you sell.

A whole chicken may include bones and trim. Vegetables lose weight when peeled. Meat can lose moisture during cooking. Frozen products may lose weight during defrosting.

If you buy 5kg of an ingredient but only have 4kg of usable product, your cost must be based on the 4kg, not the purchase weight.

The same applies to preparation losses. If a protein is trimmed before portioning, include that loss in the portion cost.

The calculation does not need to be complicated. Weigh the delivered product, weigh the usable product, and use the usable yield when working out the cost per portion.

Check the portion, not just the recipe

Portion drift is one of the quietest causes of food cost problems.

One chef uses 180g. Another uses 220g. A busy service adds an extra spoonful of sauce. A garnish becomes more generous over time.

The recipe card may still say the correct amount. The plate may not.

Add a 15-second weighing check for your three biggest-selling proteins once a week. It is a small routine, but it shows whether the written recipe is being followed in service.

Recipe cards must be used by the kitchen, not held in one chef’s head. Knowledge that exists in one person’s memory leaves when they do.

4. Divide ingredient cost by net selling price

Once you have the true portion cost, use this formula:

Food cost % = ingredient cost per portion ÷ net selling price × 100

Using the example:

• Menu price including VAT: £12
• Net selling price: £10
• Full ingredient and packaging cost: £3

£3 ÷ £10 × 100 = 30% food cost

The dish is therefore running at 30% food cost before considering labour, rent, energy, rates and other operating costs.

That is the number you need for menu decisions.

5. Compare the result with a sensible target

A common food cost target for many restaurants is between 28% and 32%.

That is a guide, not a rule. Your target depends on your concept, service style, menu mix, rent, labour model, pricing and sales channels. A premium tasting menu and a high-volume takeaway operation will not have the same cost structure.

The important point is that you choose a target deliberately and review against it consistently.

If your dish is at 30%, it may be working.

If it is at 38%, you have a decision to make:

1. Reprice the dish
   A higher price may be appropriate if the customer value and market position support it.

2. Re-portion the dish
   Check whether the serving is larger than the recipe requires.

3. Re-engineer the dish
   Change an ingredient, simplify the garnish, adjust the side or redesign the preparation.

4. Renegotiate or replace the ingredient
   Ask suppliers for an alternative specification, compare quotes or review the buying frequency.

Do not make the decision from the food cost percentage alone. Check sales volume, customer expectations and the role of the dish on the menu.

But do not ignore the number either.

Look beyond the best seller

Once you have checked one dish, review the menu using two measures:

• How often does the dish sell?
• How much gross profit does it contribute?

This is the practical side of menu engineering.

• Stars: popular and profitable. Protect their quality and visibility.
• Plough horses: popular but lower margin. Review portions, price and supplier costs.
• Puzzles: profitable but not selling enough. Improve the description, positioning or staff recommendation.
• Dogs: low sales and low margin. Consider removing or redesigning them.

The popular dish may be the one destroying margin because it sells often. A small improvement on a high-volume item can be more useful than a large improvement on a dish that sells twice a week.

Sales show what customers choose. Costing shows whether that choice works for you.

Use one bin audit to find waste

You do not need a month of guessing to understand waste.

Carry out one bin audit during a normal week. Look at what is being thrown away and record the reason:

• Overproduction
• Spoilage
• Preparation trim
• Incorrect orders
• Returned plates
• Expired stock
• Damaged packaging

A bin audit often reveals that the problem is not one dramatic loss. It is repeated small losses: too much rice cooked, vegetables prepared too early, sauce discarded at the end of service, or protein portions cut inconsistently.

Measure what is being discarded. Then decide whether the answer is better forecasting, smaller batch preparation, improved storage or a change to the recipe.

Keep supplier checks routine

Food cost control is not only a kitchen task.

Each month:

• Review your top 10 ingredient lines.
• Compare at least two supplier quotes.
• Question every unexpected price increase.
• Check that the quantity delivered matches the invoice.
• Check that the specification delivered matches what you ordered.
• Record price changes on the recipe card or costing sheet.

You do not need to challenge every penny. You do need to know where the changes are coming from.

A supplier increase may be justified. It may also be an old price that was never queried, a changed pack size, or a substitution that costs more than the original product.

Good restaurant operations management is often this practical. Check the invoice. Weigh the portion. Review the waste.

Make the five-minute check a weekly habit

The calculation is quick. The value comes from repeating it.

Each week, choose one dish and ask:

1. What is the current net selling price?
2. What does the full plate cost today?
3. Is the portion still being served consistently?
4. Is the dish within the agreed target?
5. What is the next decision?

Keep a simple record. Over time, you will see which ingredients move, which dishes drift and where your menu needs attention.

This is a useful starting point for Restaurant Profitability: 7 Mistakes Independent Owners Are Making in 2026 (and How to Fix Them). Food cost is one part of profitability, but it is often one of the clearest places to begin.

Independent restaurants are operating under sustained pressure. Industry figures indicate that 52% of UK hospitality leaders are reporting falling profitability, while critical distress across hospitality is up 17.5% year on year. More than 800 hospitality businesses are also backing calls for a VAT cut.

Those wider pressures are real. But you still need to make decisions at plate level.

Start with the dish customers order most. Strip out VAT. Use current invoices. Weigh the portion. Check the waste.

Clear numbers lead to calmer decisions.

If you want a second view of your menu, supplier costs or restaurant operations, Yin Fei Consulting’s services can provide a practical starting point. A useful conversation, not a sales script.

Restaurant profitability is under pressure from several directions at once.

Food and labour costs are rising. The National Living Wage is now £12.71 an hour for workers aged 21 and over. Earlier 2026 food inflation forecasts pointed towards 9%, while individual ingredients can move faster than the headline figure.

At the same time, diners are booking later, no-shows remain costly and third-party delivery commissions continue to reduce the value of each order.

The wider picture is difficult. Industry figures suggest critical financial distress across UK hospitality is up 17.5% year on year, while 52% of hospitality leaders report falling profitability. More than 800 hospitality businesses are also backing calls for a VAT reduction, showing how front-of-mind cost pressure has become.

But not every problem needs a major overhaul.

Often, restaurant profitability improves when you find the specific point where money is leaking, then fix the routine around it.

Here are seven common mistakes, with advice you can use on Monday.

1. Re-cost your menu when supplier prices change

A monthly costing routine is better than no costing routine. It is not enough when prices are moving quickly.

A supplier changes the price of chicken, cooking oil or dairy. The invoice is paid. The menu stays the same. Three weeks later, your food cost has worsened, but the reason is not obvious.

You do not need to rebuild every recipe from scratch every day. You do need a daily or weekly exception check.

A practical fix

Create a short list of your most exposed ingredients:

• Meat and seafood
• Cooking oils
• Dairy
• Fresh produce
• Imported ingredients
• Packaging
• High-volume items

Check these against your latest invoices. If a significant cost has changed, update the affected recipes and review the selling price or portion.

For example, if a dish cost £2.80 to produce last month and now costs £3.10, that difference matters. At 100 portions a week, it represents £30 of lost gross profit before you consider the wider menu.

Small changes are easier to manage than one large price increase after six months of drift.

The takeaway: Cost your key dishes whenever costs change, not only when the calendar says it is time.

2. Price from the net figure, not the VAT-inclusive figure

A common pricing mistake is to look at the price the customer pays and treat all of it as sales revenue.

If a dish sells for £12 including VAT, your net sales value is £10 at the standard 20% rate. If the food cost is £3, your food cost percentage is 30%, not 25%.

That difference affects every pricing decision.

The current debate around a hospitality VAT cut, backed by more than 800 businesses, shows how important this issue is to the sector. But your restaurant still needs a workable pricing model under today’s rules.

A practical fix

For each menu item, calculate:

1. Selling price excluding VAT
2. Ingredient cost
3. Food cost percentage
4. Contribution after direct costs
5. Whether the item supports your wider menu and overheads

For example:

• Ingredient cost: £3
• Target food cost: 30%
• Required net selling price: £10
• Customer price at 20% VAT: £12

This is not a complete profitability calculation. Labour, rent, energy, card fees and waste still matter. It is simply a more accurate starting point.

Make sure you also check whether different sales types, such as takeaway food, alcohol or delivery, have different VAT treatment. Your accountant can confirm the details for your business.

The takeaway: Set prices from net revenue and true food cost. VAT is not available to pay your bills.

3. Staff to the forecast, not to habit

Fixed rotas feel safe. They are also expensive when demand changes.

A restaurant may use the same staffing pattern every Tuesday because that is what it has always done. But covers vary. Bookings change. Weather affects walk-ins. A local event can turn a quiet shift into a busy one, or do the opposite.

With the National Living Wage now at £12.71 per hour, plus employer National Insurance and other employment costs, unnecessary hours quickly affect restaurant profitability.

A practical fix

Build the rota around expected covers and the work required for service.

Review:

• Bookings by day and time
• Expected walk-ins
• Average spend
• Preparation requirements
• Delivery volume
• The number of staff needed for opening and close-down
• Actual sales per labour hour

You may need more people during a busy service, not simply more people across the whole day.

A useful approach is to set a minimum staffing level, then add hours when the forecast supports them. Cross-train team members where possible so you can adjust without lowering service standards.

Do not cut hours blindly. A short-staffed service can create slower tables, mistakes and poor guest experience. The aim is a better match between labour and demand.

The takeaway: Schedule for the service you expect, then compare it with what actually happened.

4. Treat delivery commission as a direct cost

Delivery can increase sales while reducing profit.

Third-party platforms may charge commissions of 15% to 30%, depending on the platform, agreement and services used. Packaging, promotions, refunds and discounts can reduce the margin further.

The mistake is treating delivery as free marketing while pricing the menu as if the order were being served in the restaurant.

A practical fix

Create a separate delivery margin calculation.

For each delivery item, include:

• Ingredient cost
• Packaging
• Platform commission
• Discounts funded by you
• Refunds and remakes
• Payment fees
• Any delivery-specific labour

Then compare the contribution with dine-in and direct-order sales.

You may decide to:

• Use a separate delivery menu
• Remove low-margin dishes
• Adjust delivery prices
• Create bundles with a stronger contribution
• Encourage direct ordering for repeat customers
• Restrict promotions to quieter periods

The right question is not, “Did delivery sales grow?”

It is, “What did each delivery order contribute after every direct cost?”

The takeaway: Delivery is a sales channel, not automatically a profitable one.

5. Put a clear policy around no-shows

An empty table at 7.30pm is not just a lost booking. The kitchen has prepared, the team is working and the opportunity to seat another party has gone.

Last-minute bookings and cancellations make planning more difficult. A clear policy gives you a way to protect peak services without making the process hostile.

OpenTable data suggests that credit card holds can reduce no-shows by up to 16%, deposits by around 57% and prepaid experiences by 44%, compared with bookings without those protections.

A practical fix

Start with your busiest services rather than applying the same policy to every booking.

You could use:

• A card guarantee for larger parties
• A deposit on peak evenings
• A clear cancellation deadline
• A fair charge for late cancellation or non-arrival
• Automated reminders
• A waiting list for high-demand periods

Explain the policy at the point of booking and in the reminder. The tone matters. It should be clear and reasonable, not punitive.

Track the results weekly. Measure no-shows by day, service, party size and booking channel.

The takeaway: Protect your busiest tables with a policy guests can understand.

6. Stop chasing sales that do not improve the margin

More sales can create a false sense of progress.

Discounts, multi-buys and broad promotions may increase covers or order volume. They may also leave you with more work and less money.

A £10 discount that produces an extra £40 in sales sounds useful. But if the additional sales carry high food, labour, delivery or packaging costs, the real contribution may be small.

A practical fix

Before running an offer, write down:

• The normal selling price
• The discounted price
• The direct cost
• The expected extra labour
• The expected increase in covers or orders
• The contribution after the promotion

Use offers for a clear reason. Fill a quiet service. Move a specific product. Encourage direct ordering. Introduce a new customer to a profitable part of the menu.

Avoid discounting simply because sales feel slow.

Protecting margin does not mean refusing every promotion. It means knowing what the promotion is expected to achieve.

The takeaway: Measure contribution, not just turnover.

7. Review the numbers every week

A month-end profit and loss report tells you what has already happened.

By then, you may have worked several weeks with a poor rota, an underpriced menu item, excess waste or a delivery promotion that is losing money.

Weekly numbers give you time to adjust.

A practical fix

Set aside 30 to 45 minutes each week to review a small number of measures:

• Net sales
• Food cost percentage
• Labour percentage
• Prime cost
• Waste
• Average spend
• Covers and no-shows
• Delivery contribution
• Cash position

Do not try to analyse everything. Choose the numbers that help you make decisions.

Ask three questions:

1. What changed?
2. Why did it change?
3. What will we adjust this week?

The routine matters more than the complexity of the spreadsheet. A simple weekly review that leads to action is more useful than a detailed report that arrives too late.

The takeaway: Review early enough to change the result.

Protect margin before you chase growth

Restaurant profitability is not improved by one perfect formula.

It comes from a series of ordinary decisions made consistently:

• Cost the right dishes
• Price from the net figure
• Match labour to demand
• Separate delivery margins
• Protect peak bookings
• Test promotions properly
• Review the numbers weekly

That is the practical work behind stronger restaurant cost control.

At Yin Fei Consulting, the starting point is usually the same: understand what is happening on the ground, then focus on the most useful change. The work covers profitability and cost control, operations, staffing, customer experience, openings and sustainable growth.

The perspective comes from more than a decade in hospitality, including helping build and operate Chop Chop, named Best Chinese Restaurant in Scotland on Gordon Ramsay’s The F Word. It is advice shaped by the reality that service still has to happen tonight.

If your numbers feel unclear, bring the messy bit. It can be a useful conversation, not a sales script.

Explore Yin Fei Consulting’s services or learn more about the experience behind the consultancy.

Find the friction. Fix the right thing. Then review the result next week.