📝 Basic knowledge and formulas · ⏱️ 4 min read

What's the risk if you don't know your food costs?

📝 KitchenNmbrs · updated 07 Apr 2026

Quick answer
A popular bistro sold 50 steaks daily at €28 each, with the owner believing he earned €8 profit per steak. Reality? His actual profit was €5. 19 less per portion, costing him €94,845 annually.

A popular bistro sold 50 steaks daily at €28 each, with the owner believing he earned €8 profit per steak. Reality? His actual profit was €5.19 less per portion, costing him €94,845 annually. This disaster unfolds every day in restaurants that don't track their true food costs.

Why food costs matter so much

Your food cost determines if you make or lose money on each dish. Without this knowledge, you're gambling with your business and hoping for the best.

? Example:

A bistro sells 50 steaks daily for €28.00. The owner assumes he makes €8 profit per steak.

  • Real ingredient costs: €12.50 (including garnish and sauce)
  • Selling price excl. VAT: €25.69
  • Actual profit: €13.19 per steak

Difference: €5.19 less profit than expected = €94,845 per year!

The biggest risks at a glance

Risk 1: Prices too low

Without food cost knowledge, you often set prices way too low. You think you're profitable, but you're actually bleeding money with every order.

  • You underestimate ingredient costs
  • You forget garnishes, sauces, and oil
  • You don't account for trimming loss
  • You don't adjust prices after purchasing costs rise

Risk 2: Wrong menu choices

Without food cost knowledge, you might be promoting dishes that barely generate profit. You're steering guests toward your worst performers.

? Example:

A restaurant has two popular dishes:

  • Salmon: €24.00 sales, €9.50 cost = €12.50 profit
  • Pasta: €16.50 sales, €4.20 cost = €11.13 profit (excl. VAT)

Salmon generates more profit, but without food cost data you might push pasta because it seems more popular.

Risk 3: No control over supplier price increases

Suppliers regularly raise their prices. Without food cost monitoring, you notice this too late and fall behind for months.

  • Meat prices rose an average of 12-18% in 2023
  • Fish became 15-25% more expensive
  • Dairy increased by 8-15%

⚠️ Watch out:

A 15% increase in your main ingredients can push your food cost from 30% to 35%. On €500,000 in sales, that costs you €25,000 per year.

The financial impact in numbers

Scenario 1: Food cost 5% too high

If your food cost hits 35% instead of 30%, you lose serious money:

  • At €300,000 sales: €15,000 per year
  • At €500,000 sales: €25,000 per year
  • At €800,000 sales: €40,000 per year

Scenario 2: One dish consistently mispriced

? Example calculation:

Popular pasta carbonara:

  • Sales: 80 portions per week
  • Price: €16.50 (€15.14 excl. VAT)
  • Assumed food cost: €4.50
  • Actual food cost: €6.20

Loss: €1.70 per portion × 80 × 52 = €7,072 per year on one dish!

How food cost ignorance develops

Common thinking mistakes

  • "I roughly know what it costs" - Estimates are often 20-40% too low
  • "We're doing well, so it must be right" - Sales say nothing about profit per dish
  • "My chef keeps an eye on it" - Chefs aren't food cost experts
  • "Excel is too much work" - So you don't do it at all

Practical obstacles

Many entrepreneurs want to track food costs, but struggle with:

  • No time for complicated calculations
  • Supplier invoices are unclear
  • Trimming loss is hard to estimate
  • Recipes aren't centralized anywhere
  • Price changes get forgotten

The solution: systematic food cost management

What you need to know at minimum

For each dish on your menu:

  • Exact ingredient list with quantities
  • Current purchasing prices per ingredient
  • Trimming loss percentage
  • Total food cost per portion
  • Food cost percentage

How often should you check?

From years of working in professional kitchens, I've seen the most successful operations follow this schedule:

  • Weekly: Your 5 best-selling dishes
  • Monthly: All dishes on your menu
  • With every invoice: Check if prices have risen
  • For new dishes: Calculate food cost before launch

⚠️ Watch out:

Start small. Focus on your 5 most popular dishes first. Once those are sorted, you've already solved 70-80% of your problem.

Practical first steps

You don't need to tackle everything at once. Start with these basics:

  1. Choose your top 3 dishes - The ones you sell the most
  2. List all ingredients - Don't forget garnishes and sauces
  3. Find your recent invoices - What do you actually pay per kilo/liter?
  4. Calculate the food cost - Including trimming loss
  5. Check your food cost percentage - Below 35%? Then you're good

A food cost calculator automates this process, so you don't have to recalculate every time. But the most important thing is that you start tracking your food costs at all.

How do you check if your food costs are correct? (step by step)

1

Gather data on your top dish

Take your best-selling dish and list all ingredients with exact quantities. Don't forget garnishes, sauces, oil, and butter - everything that goes on the plate counts.

2

Calculate actual purchasing costs

Find your recent invoices and note the price per kilo or liter for each ingredient. Factor in trimming loss: with 20% loss, €10/kg actually becomes €12.50/kg.

3

Check your food cost percentage

Add up all ingredient costs and divide by your selling price excl. VAT, then multiply by 100. Above 35%? Then you're probably losing money on this dish.

✨ Pro tip

Calculate your actual food costs for your 3 most popular dishes within the next 48 hours. You'll likely discover at least one dish is costing you €200+ monthly in hidden losses.

Calculate this yourself?

In the KitchenNmbrs app you can do this in just a few clicks. 7 days free, no credit card.

Try KitchenNmbrs free →

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Frequently asked questions

What food cost percentage is normal?
For restaurants, 28-35% is standard. Above 35% becomes difficult to be profitable, below 25% might mean you're too expensive for your target market.
What do I do if my supplier raises prices?
Immediately recalculate your new food cost. If it goes above 35%, you need to adjust your selling price or find cheaper alternatives. Don't wait - price increases compound quickly.
How do I factor trimming loss into food costs?
With 20% trimming loss, you have 80% yield. Divide your purchasing price by 0.80. So €10/kg becomes €12.50/kg actual food cost.
ℹ️ This article was prepared based on official sources and professional expertise. While we strive for current and accurate information, the content may differ from the most recent regulations. Always consult the official authorities for binding standards.

Sources consulted

Food Standards Agency (FSA) https://www.food.gov.uk

The HACCP standards shown in this application are for informational purposes only. KitchenNmbrs does not guarantee that displayed values are current or complete. Always consult the FSA or your local authority for the latest regulations.

JS

Written by

Jeffrey Smit

Founder & CEO of KitchenNmbrs

Jeffrey Smit built KitchenNmbrs from 8 years of hands-on experience as kitchen manager at 1NUL8 Group in Rotterdam. His mission: give every restaurant owner control over food cost.

8 years kitchen manager at 1NUL8 Group Rotterdam
Expertise: food cost management HACCP kitchen management restaurant operations food safety compliance

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