Last month, a chef told me he discovered his signature pasta was losing €2.40 per plate. He'd been estimating costs instead of calculating them properly. With simple weekly checks, you can avoid these costly surprises and turn food costing into a 10-minute routine.
Why calculating food costs often gets postponed
Most entrepreneurs know they need to track their food costs. Yet it doesn't happen. Why not?
- It feels overwhelming ("where do I even begin?")
- You assume it'll eat up hours of your day
- There's no clear system in place
- Supplier prices shift and you can't keep up
The outcome: you're working with outdated numbers or rough guesses. And that's bleeding money from your bottom line.
⚠️ Watch out:
Rough estimates typically run 20-30% below actual costs. You think a dish costs €8, but it's really €11. On 100 portions weekly, you're losing €15,600 annually.
The 3-step routine for quick food cost calculation
Transform food cost calculation into habit with this method:
1. Gather all ingredient prices in one spot
Stop hunting through receipts. Build a master list containing every ingredient you use with current pricing. Update this whenever suppliers adjust their rates.
💡 Sample ingredient list:
- Beef (entrecote): €28.50/kg
- Butter: €12.00/kg
- Potatoes: €1.80/kg
- Lettuce: €3.20/kg
- Olive oil: €8.50/liter
2. Calculate one dish weekly
Don't tackle everything simultaneously. Begin with your top-selling dish. The following week, move to your second bestseller. You'll build your database gradually.
3. Review and update monthly
Block it in your calendar: first Monday monthly, 30 minutes for food cost review. New supplier invoices arrived? Adjust the prices. You're done.
The fastest approach: calculate food cost per portion
For each dish you need:
- Main ingredient: meat, fish or plant-based protein
- Accompaniments: potatoes, vegetables, sauces
- Finishing touches: herbs, oil, butter for plating
- Every component that touches the plate
💡 Sample: Steak with fries
- Entrecote 200g: €5.70
- Fries 250g: €0.45
- Lettuce 50g: €0.16
- Butter 10g: €0.12
- Cooking oil: €0.08
Total food cost: €6.51 per portion
Formula for food cost percentage
Once you've got the food cost, calculate your percentage immediately:
Food cost % = (Ingredient cost / Selling price excl. VAT) × 100
💡 Sample calculation:
Steak menu price: €32.00 incl. 9% VAT
- Price excl. VAT: €32.00 ÷ 1.09 = €29.36
- Food cost: €6.51
- Food cost: (€6.51 ÷ €29.36) × 100 = 22.2%
That's solid profitability!
Account for trimming loss and waste
Don't overlook trimming loss. You purchase 1 kg of fish but yield 600 grams of fillet. That 400-gram loss must be calculated in.
⚠️ Watch out:
With 40% trimming loss, your fish becomes 67% pricier. Whole salmon €18/kg becomes €30/kg fillet cost. Calculate: €18 ÷ 0.60 = €30/kg.
Tools that speed things up
Manual calculation works fine, but digital solutions make it much quicker:
- Excel: Perfect for beginners, but gets chaotic with numerous dishes
- Dedicated apps: Tools like KitchenNmbrs handle food cost calculations automatically
- Pen and paper: Functions well, but updates consume significant time
From years of working in professional kitchens, I've seen that the key is simply beginning. Even basic pen-and-paper tracking delivers results.
Timing your food cost updates
Food costs aren't a set-and-forget task. Update in these scenarios:
- Supplier increases prices (typically 2-3× annually)
- You modify a recipe (different ingredients or portion amounts)
- You discover your food cost exceeds expectations
- During seasonal shifts (produce becomes more or less expensive)
💡 Sample: Seasonal impact
Tomatoes run €4.50/kg in winter, €2.20/kg in summer.
Your salad costs €2.85 in winter, €2.16 in summer. That's €0.69 difference per portion.
How do you make food cost calculation routine? (step by step)
Create an ingredient list
Write down all ingredients you use regularly with current purchase prices. Start with your 20 most used ingredients. This is your base database.
Calculate one dish per week
Take your best-selling dish. Add up all ingredients: main course, side dishes, garnish, everything that goes on the plate. Calculate the total food cost per portion.
Check your food cost percentage
Divide the food cost by your selling price (excl. VAT) and multiply by 100. Below 35%? Then you're earning well. Above 35%? Time to adjust your price or portion.
Schedule monthly updates
Block 30 minutes on the first Monday of each month in your calendar. Check if suppliers have raised prices and update your food costs. This way you stay current.
✨ Pro tip
Focus on your 3 highest-volume dishes and calculate their costs within the next 7 days. These dishes typically represent 60% of your food sales, so getting them right delivers immediate profit impact.
Calculate this yourself?
In the KitchenNmbrs app you can do this in just a few clicks. 7 days free, no credit card.
Was this article helpful?
Frequently asked questions
What if my food cost comes out above 35%?
You're likely losing money on that dish. Consider raising the menu price, reducing portion size, or switching to more cost-effective ingredients. Sometimes a combination of all three works better than one drastic change.
Do I also need to count garnish and herbs?
Absolutely, everything touching the plate counts. Even that 5-cent parsley adds up. At 1000 portions monthly, that's €50 you'd otherwise miss.
How do I handle recipes with expensive seasonal ingredients?
Calculate costs for both peak and off-season pricing, then set your menu price based on the higher cost. This prevents profit erosion during expensive periods while boosting margins during cheaper seasons.
📚 Sources consulted
- EU Verordening 852/2004 — Levensmiddelenhygiëne (2004) — Official source
- EU Verordening 853/2004 — Hygiënevoorschriften voor levensmiddelen van dierlijke oorsprong (2004) — Official source
- EU Verordening 1169/2011 — Voedselinformatie aan consumenten (2011) — Official source
- NVWA — Hygiënecode voor de horeca (2024) — Official source
- NVWA — Allergenen in voedsel (2024) — Official source
- Codex Alimentarius — International Food Standards (2024) — Official source
- FSA — Safer food, better business (HACCP) (2024) — Official source
- BVL — Lebensmittelhygiene (HACCP) (2024) — Official source
- Warenwetbesluit Bereiding en behandeling van levensmiddelen (2024) — Official source
- WHO — Foodborne diseases estimates (2024) — Official source
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.
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.
Calculate it yourself with KitchenNmbrs
All the formulas you learn here — KitchenNmbrs calculates them automatically. Enter your ingredients and instantly see your food cost, margin, and selling price. Try it free for 14 days.
Start free trial →