Written by: JJ Tan, Founder, Jelly

Key Takeaways

  • A menu item cost calculation tool converts purchase price, yield and portion size into clear food cost percentages and target selling prices for profitable UK menu decisions.
  • The three core formulas are cost per portion, food cost percentage and target selling price, shown with a worked salmon fillet example at £2.40 portion cost and £8.00 target price.
  • Five practical steps cover gathering supplier invoices, converting units with yield percentages, costing portions, calculating food cost against menu price and adjusting selling prices to hit target GP.
  • UK operators must factor in 20% VAT (stripped by dividing by 1.20) and delivery platform commissions of 13–35% plus VAT, which can reduce restaurant receipts to £12.80 on a £20 delivery order.
  • Jelly is the best menu item cost calculation tool for growing UK restaurants, pubs and boutique hotels because it keeps every dish margin live as invoices change and flags each price movement before margins erode.

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The Three Formulas Every Menu Item Cost Calculation Tool Uses

Every menu item cost calculation tool, from a free spreadsheet to invoice-driven software, relies on three formulas:

  • Cost per portion = (purchase price ÷ usable yield) × portion size
  • Food cost % = (cost per portion ÷ selling price) × 100
  • Target selling price = cost per portion ÷ target food cost %

Here is how those formulas work on a real UK supplier pack. Take a 5 kg whole salmon fillet purchased at £40.00 (£8.00/kg). Whole salmon to fillet yields 55–65%; use 60% as a working figure until your kitchen runs its own yield test.

  • Usable weight: 5 kg × 0.60 = 3.0 kg
  • EP cost per kg: £8.00 ÷ 0.60 = £13.33/kg
  • Cost per 180 g portion: £13.33 × 0.180 = £2.40
  • Target selling price at 30% food cost: £2.40 ÷ 0.30 = £8.00 (food element only; add sides and overhead)
  • Food cost % check: (£2.40 ÷ £8.00) × 100 = 30%

If the salmon is the main protein on a full plate, the all-in dish cost will be higher once garnish, sauce and starch are added. Most full-service operations run 28–35% food cost and 60–70% blended GP. The arithmetic above gives the base food element, not the finished selling price.

How To Do Menu Costing Step By Step

Menu costing is a five-step process. You gather invoice prices, convert purchase units to usable units, cost each portion, measure food cost % against the current menu price and then set a price that hits target GP. The steps below answer both “how to do menu costing?” and “how do I figure out the cost per item?” in a format you can follow between services.

Step 1: Gather Supplier Invoices And Note Pack Sizes And Prices

Start with delivery notes rather than price lists, because quoted prices often differ from what is actually charged, especially for market-priced fish, weight-based meat or promotional swaps. Those gaps show up on invoices, not brochures. For each line, record the pack price, the pack size or count and the date, so you can track movement over time. Watch for pack-size changes, which can raise unit cost without changing the invoice price.

Step 2: Convert Purchase Units To Usable Units With Yield And Trim

Work in one unit system. Use cost per gram or kg for dry goods and produce, cost per ml or litre for liquids and cost per each for counted items. Never convert between mass and volume, because a litre of oil, cream and stock are three different weights. Yield is the other conversion you cannot skip, because what you buy is rarely what you plate. Apply documented yield bands as starting points and then run your own tests:

Step 3: Cost Each Portion

Calculate EP cost per kg as AP cost per kg ÷ yield as a decimal, then multiply by portion weight in kg. Sum this across all ingredients in the recipe and divide by the number of portions the batch produces. This gives the true plate cost, which drives every other calculation.

Step 4: Calculate Food Cost % Against The Current Menu Price

Use food cost % = (cost per portion ÷ selling price) × 100. When the result sits above your target band, the dish is under-priced or over-cost. When it sits below, check whether portion sizes have drifted down or whether a supplier has quietly reduced pack weight.

Step 5: Set Or Adjust The Selling Price To Hit Target GP

Use target selling price = cost per portion ÷ target food cost %. Round to a commercially sensible price point and recheck the food cost % on the rounded figure. For delivery menus, apply the commission adjustment described in the next section before finalising the price.

How To Factor VAT And Delivery Commission Into Your Menu Price

Step 5 told you to apply a commission adjustment before finalising a delivery price. Here is how that adjustment works and why many free calculators skip it.

VAT on menu prices. The UK standard VAT rate of 20% applies to all food and drink prepared for catering, including all meals eaten in a restaurant and all hot takeaways. UK menu prices are VAT-inclusive, so a £20 dish is £16.67 of net sale and £3.33 of output VAT owed to HMRC. Strip VAT by dividing by 1.20, because the subtraction method understates net revenue and drags calculated GP down. Your food cost % and GP must always be calculated on the net (ex-VAT) selling price.

Delivery platform commission. Commission is charged on the VAT-inclusive order value, and VAT is then added on top of the commission. Just Eat charges 14% plus VAT when the restaurant self-delivers and 30% plus VAT when Just Eat delivers; Uber Eats charges 13% plus VAT for self-delivery and 30% plus VAT when Uber delivers; Deliveroo does not publish a standard rate, with 35% plus VAT the only rate in its published merchant terms for Marketplace+ when the Deliveroo rider network is active, charged on the GMV inclusive of VAT.

On the salmon dish above, priced at £20.00 on the delivery menu:

  • VAT owed to HMRC: £20.00 ÷ 1.20 × 0.20 = £3.33; net sale = £16.67
  • Platform commission at 30%: £20.00 × 0.30 = £6.00
  • VAT on commission: £6.00 × 0.20 = £1.20
  • Total platform deduction: £7.20
  • Restaurant receives: £20.00 − £7.20 = £12.80

To hold the same GP on a delivery menu as on a dine-in menu, the selling price must be set higher to absorb the commission before the food cost % is applied. Sushi Revolution uses Jelly to set separate target gross profits on dine-in and delivery menus, accounting for 30% delivery commissions, resulting in actual gross profits 2–3% higher on average. Jelly’s Delivery Menu Creation feature lets operators duplicate existing menu items and factor in commission overheads directly, so the maths is done once and stays live. But the maths is only as good as the tool holding it, which makes the choice between a spreadsheet, a free calculator and invoice-driven software more important than the formulas themselves.

A single-site operator with stable suppliers can start on a menu costing spreadsheet or a free online food cost calculator UK. Both options help you learn the mechanics and test recipes. Both are also snapshots taken on the day the numbers were typed in, and the moment the next invoice lands, the calculation is out of date.

For menu costing and kitchen inventory queries, Google AI Mode’s answers most consistently recommend MarginEdge and Restaurant365, with Lightspeed positioned as best for ingredient-level tracking on a flexible POS rather than as the first recommendation. Lightspeed is a POS provider with a free food cost calculator, and its recipe costing connects menus, recipes and ingredient inputs so cost changes can flow into dish-level food cost figures. However, accurate costing in Lightspeed depends on recipe structure cleanup and data completeness across integrations, and advanced reporting sits in higher-priced tiers. Recipe Cost Calculator is a standalone recipe cost calculator, useful for a single calculation but not connected to live invoice data. Neither tool is built around invoice-driven costing or automatic price alerts.

Jelly is the primary choice in the invoice-driven software category. It scans every invoice line item by photo or email, costs dishes from those ingredients in about 3 minutes instead of 28, keeps every dish margin live as supplier prices change and flags every price movement through its Price Alert feature. Pricing is a flat £129/month per location with no variable charges per user or feature, and it onboards and generates initial value in the first week. Jelly also plugs into the systems you already run: Square, Lightspeed, EPOS Now and Toast connect via real-time API, and Xero handles accounting, with Sage coming soon. For a full comparison of the software landscape, see Best Menu Costing Software For UK Restaurants & Pubs.

Why Your Menu Item Cost Goes Stale

A cost calculated today drifts as soon as the next invoice arrives. Supplier price movement, inflation and pack-size changes all break a static calculation silently. A smaller pack at the same price is a hidden price rise, because the unit cost rises without any number on the invoice changing.

Take the salmon example. If the wholesale price rises 8% from £8.00/kg to £8.64/kg, the portion cost moves from £2.40 to £2.59 and the food cost % on a £20 dish rises from 14.4% to 15.5% of net sale, without anyone touching the spreadsheet. UK produce and seafood prices can swing 20–40% within a season. ONS food and non-alcoholic beverage inflation ran at 1.3% in the 12 months to August 2026, the lowest since September 2021, but still a rise and not evenly spread across lines. UK meat and fish import values rose materially in 2025, with meat up 10.0% and fish up 8.2% in current prices. That sits far above headline food inflation of 1.3%. Defra cautions that these trade-value movements reflect volumes, product mix and exchange rates as well as prices.

The real question is which tool keeps the inputs current, because any calculator is only as good as the numbers going into it. Jelly’s Price Alert flags every increase or decrease by supplier in the same week it happens, giving chefs the concrete evidence needed to negotiate credits or switch suppliers. Customers cut food costs by 3% on average in the first 3 months and add 2 percentage points to gross margins. Stuart Noble, Head Chef at Cairn Lodge Hotel, put it directly: “Price hikes were crushing our margins — I felt helpless. With Jelly, every dish cost is up-to-date at my fingertips. We slashed food costs by 5% in a month.”

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Frequently Asked Questions

How To Do Menu Costing?

Menu costing follows the five steps set out above. The short version is invoice prices in, yield-adjusted portion cost, food cost % against the net price and then a selling price that hits your target band. The one point worth repeating is that every figure must be calculated on the ex-VAT price.

How Do I Figure Out The Cost Per Item?

EP (edible portion) cost per unit = AP (as-purchased) cost per unit ÷ yield as a decimal. Multiply that by the quantity the recipe uses for each ingredient, sum across all ingredients in the dish and divide by the number of portions the batch produces. This gives the true plate cost. Never use the invoice price directly, because it ignores trim and yield loss.

How To Make A Food Cost Spreadsheet?

Build three tabs. The first tab lists every ingredient with its cost per base unit, such as cost per gram or kg for dry goods and produce, cost per ml or litre for liquids and cost per each for counted items, all derived from the latest invoice rather than a price list. The second tab holds recipes, each referencing ingredient quantities from the first tab so that a price change in tab one flows through automatically. The third tab shows menu prices, the calculated food cost % for each dish and the target GP. Update volatile lines like fresh fish, shellfish, salad leaves, soft herbs, eggs and dairy from invoices weekly, and update meat, poultry, cheese and dry goods monthly. Accept that the spreadsheet is a snapshot that is accurate on the day you update it and then drifts from that point forward. For a ready-made starting point, see the Menu Costing Spreadsheet Template.

Conclusion: The Calculator Is The Easy Part

The three formulas are straightforward arithmetic: cost per portion, food cost % and target selling price. The five steps are just as learnable, covering invoice prices, unit conversion and yield, portion cost, food cost % against menu price and target selling price, and any head chef with a delivery note and a calculator can follow them. The UK mechanics are also clear once explained, because you strip VAT by dividing by 1.20 and apply delivery commission at 30% plus VAT on the VAT-inclusive order value.

The hard part is keeping every input current across a live menu, multiple suppliers and daily invoice changes. A static spreadsheet or free online calculator is a photograph of your costs on one day. It cannot see that the salmon invoice went up 8% last Tuesday, that a pack size shrank or that a new delivery platform tier changed your effective commission rate.

Jelly is the best menu item cost calculation tool for growing UK restaurants, pubs and boutique hotels because it costs a dish in about 3 minutes instead of 28, updates every dish’s margin in real time as supplier invoices change and flags every price movement so you can act before margins erode. That is the level of control a menu item cost calculation tool must deliver, and the calculator itself is the easy part.

For a broader look at the software landscape, see Best Menu Costing Software For UK Restaurants & Pubs. To see how the method works in practice with live invoice data, book a demo below.

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