Negative margins happen when ingredient costs exceed selling prices, often due to supplier increases or oversized portions. Check your top-selling and seasonal dishes monthly, calculate true costs excluding VAT, and either raise prices, adjust recipes, or remove unprofitable items. Even small losses of €0.50 per dish can cost thousands annually.
Most restaurants unknowingly serve dishes that lose money with every single order. Your salmon salad might look profitable at €16.50, but if ingredients cost €17.20, you're bleeding €2.06 per plate. Here's how to spot these profit killers before they drain your bottom line.
What is a negative margin?
A negative margin means your ingredient costs exceed your selling price. Every time someone orders that dish, you're literally paying customers to eat your food.
💡 Example:
You sell a salmon salad for €16.50 (incl. 9% VAT):
- Selling price excl. VAT: €15.14
- Ingredient costs: €17.20
Loss per portion: €2.06
How do negative margins happen?
These profit killers sneak up on you through:
- Silent supplier increases - They raise prices but you forget to update menus
- Seasonal price swings - That truffle pasta costs double in summer
- Generous portions - Your chef's "eye-balling" portions costs you dearly
- Hidden waste - You calculate whole fish prices but serve fillets
⚠️ Watch out:
Many owners discover this disaster months later during quarterly reviews. By then, you've already bled thousands.
Which dishes do you check first?
Target your riskiest menu items first:
- Fresh seafood - Market prices change weekly
- Seasonal specialties - Asparagus, mushrooms, game meat
- Premium proteins - Wagyu, aged steaks, organic chicken
- Volume sellers - Your top 10 dishes drive 70% of revenue
Calculation step by step
For each suspicious dish, do this math:
💡 Example calculation:
Steak menu for €32.00 (incl. 9% VAT):
- Selling price excl. VAT: €29.36
- Steak 250g: €8.50
- Fries and vegetables: €2.80
- Sauce and butter: €1.20
Total ingredient costs: €12.50
Margin: €29.36 - €12.50 = €16.86 (positive ✓)
Impact of negative margins
Based on real restaurant P&L data, just one popular dish with negative margins can wipe out your entire monthly profit. Here's the brutal math:
💡 Impact example:
Loss of €2 per portion on a crowd favorite:
- 50 portions per week
- 50 weeks per year
Total loss: €5,000 per year
What do you do about negative margins?
You've got three moves to stop the bleeding:
- Bump the price - Print new menus immediately
- Redesign the recipe - Swap expensive ingredients or trim portions
- Kill the dish - Sometimes amputation saves the patient
⚠️ Watch out:
Respect psychological pricing. €19.95 often outsells €20.50, even with lower margins.
How often should you check?
Make margin audits part of your regular routine:
- Monthly reviews - Scan your complete menu
- New dish launches - Test margins before going live
- Supplier notifications - React within 48 hours of price changes
- Seasonal transitions - Spring and fall menus need extra attention
How do you check for negative margins? (step by step)
Make a list of all your dishes
Start with your menu and note the selling price of each dish. Convert this to excl. VAT by dividing by 1.09 (at 9% VAT).
Calculate ingredient costs per dish
Add up all ingredients: main product, garnishes, sauces, oil, butter. Don't forget anything that goes on the plate. Check current purchase prices with your suppliers.
Subtract ingredient costs from selling price
Selling price excl. VAT minus ingredient costs = margin. Is this negative? Then you're losing money on this dish. Positive means profit.
Prioritize based on impact
Dishes you sell a lot have more impact. A loss of €1 on 100 portions per month costs you €1,200 per year.
Create an action plan for each negative dish
Decide per dish: raise price, adjust recipe, or remove it. Test new prices first on a small part of your guests.
✨ Pro tip
Weigh your 3 most expensive protein dishes during lunch and dinner service this week. If portions vary by more than 10%, you're losing money on inconsistency alone.
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
How often should I check for negative margins?
Review your top 10 dishes monthly and seasonal items weekly. After any supplier price increase, check affected dishes within 48 hours.
Should I include VAT in the calculation?
Never include VAT in margin calculations. You buy ingredients VAT-free, so compare like with like. Divide your menu price by 1.09 for 9% VAT.
What if I'm only losing €0.30 per dish?
Small losses become massive hemorrhages. At 150 portions monthly, that's €540 yearly per dish. Most restaurants have 3-4 small losers bleeding simultaneously.
Can I raise prices without scaring away customers?
Test price increases on 2-3 dishes first and monitor sales volume for two weeks. Most customers accept increases under €2 without complaint.
What if my kitchen manager insists portions are correct?
Weigh 5 random portions during different shifts. Kitchen staff often add "just a little extra" that destroys your margins completely.
My entire menu shows negative margins - what now?
You have a structural crisis. Check if your costing data is current, portions match recipes, and when you last updated prices. This requires immediate action.
📚 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 →