Picture this: your beef supplier just raised prices from €18 to €22 per kilo. You're not just looking at €4 extra per kilo - that single increase creates a domino effect across every financial metric in your restaurant. Your margins shrink, break-even climbs, and EBITDA takes a hit.
Why one price increase affects everything
If your supplier raises the price of beef from €18 to €22 per kilo, you might think: "That's €4 per kilo extra." But that €4 has a cascade effect on all your KPIs.
⚠️ Watch out:
Many entrepreneurs only look at food cost percentage, but forget that higher purchase costs also affect your absolute profit per dish. A rise from 30% to 32% food cost seems small, but can cost you €2,000 per month.
The KPI cascade during price increases
Every price increase affects these KPIs in order:
- Food cost percentage - rises directly
- Gross margin per dish - falls in euros
- Average margin per cover - falls
- Break-even point - rises (more covers needed)
- EBITDA - falls due to lower margins
- Cash flow - worsens due to lower profit
Step 1: Calculate new food cost per dish
Start with your top-performing dishes. For each dish:
💡 Example:
Steak (200g) - old situation:
- Meat: 200g × €18/kg = €3.60
- Sides: €2.40
- Total ingredients: €6.00
- Selling price: €32.00 incl. VAT (€29.36 excl.)
- Food cost: 20.4%
After price increase to €22/kg:
💡 New situation:
- Meat: 200g × €22/kg = €4.40
- Sides: €2.40 (unchanged)
- Total ingredients: €6.80
- Selling price: €32.00 (not yet adjusted)
- New food cost: 23.2%
Impact: +2.8 percentage points food cost, €0.80 less profit per dish
Step 2: Calculate impact on monthly profit
Add up for all your dishes how much extra costs you have per month:
Formula: Extra costs = (New ingredient costs - Old ingredient costs) × Number sold per month
💡 Example calculation:
Restaurant with 3 beef dishes:
- Steak: €0.80 extra × 120/month = €96
- Beef stew: €0.60 extra × 80/month = €48
- Carpaccio: €0.30 extra × 60/month = €18
Total extra costs: €162 per month = €1,944 per year
Step 3: Calculate new break-even point
Higher food cost means less profit per cover. You'll need more guests to achieve the same total profit.
Formula: New break-even = Fixed costs / (New average margin per cover)
💡 Break-even example:
Before price increase:
- Fixed costs: €12,000/month
- Average margin per cover: €15.20
- Break-even: 789 covers/month
After price increase (margin falls to €14.60):
- New break-even: 822 covers/month
- You need 33 extra covers per month
Step 4: Calculate EBITDA impact
Based on real restaurant P&L data, EBITDA drops directly with your lower margins. There's no cushion here.
Formula: EBITDA impact = Total extra costs per year
⚠️ Watch out:
An EBITDA drop of €2,000 per year seems small, but for a restaurant with 8% EBITDA margin this equals €25,000 less in turnover "worth" of profitability.
Step 5: Determine your action plan
With all the numbers clear you have three options:
- Raise prices - maintain your margins, risk fewer guests
- Adjust recipes - cheaper ingredients, smaller portions
- Buy more efficiently - different supplier, bulk discounts
Calculate the impact on your KPIs for each option before you decide.
Tools for continuous monitoring
Manually tracking all KPIs with every price change takes a lot of time. A system like KitchenNmbrs automatically calculates your new food cost, margins and break-even point as soon as you adjust purchase prices.
This way you immediately see the impact on all your financial KPIs and can decide faster whether price adjustment is needed.
How do you calculate KPI impact step by step?
Inventory all affected dishes
Make a list of all dishes containing the ingredient that has become more expensive. Note per dish how many grams/ml you use and how many you sell per month.
Calculate new cost price per dish
Replace the old purchase price with the new one and calculate the new total ingredient costs. Divide by your selling price excl. VAT for your new food cost percentage.
Calculate monthly impact
Multiply the difference in cost price per dish by the number of portions sold per month. Add up all dishes for your total extra costs.
Recalculate break-even point
Divide your fixed costs by your new average margin per cover. The difference shows how many extra guests you need to earn the same amount.
Determine action plan per KPI
Choose per KPI whether you accept the impact, raise prices, adjust recipes or buy more efficiently. Calculate the consequences of each choice beforehand.
✨ Pro tip
Run a complete KPI analysis within 48 hours of any supplier price increase above 10%. This prevents margin erosion from compounding over weeks before you notice the damage.
Calculate this yourself?
In the KitchenNmbrs app you can do this in just a few clicks. 7 days free, no credit card.
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Frequently asked questions
Which KPI reacts fastest to price increases?
Food cost percentage reacts immediately. As soon as your purchase price rises, your food cost rises. EBITDA and cash flow follow within a month, break-even point you only see if your turnover drops.
Do I need to raise all my prices if one ingredient becomes more expensive?
Not necessarily. First calculate which dishes are most affected. Often you can compensate for the impact of 10+ dishes with price increases on just 2-3 popular dishes.
How often should I check my KPIs with fluctuating purchase prices?
Check at least monthly your food cost of top-selling dishes. With strong inflation or seasonal products, weekly checks may be needed to avoid big surprises.
What if my EBITDA drops below 5% due to price increases?
Then action is needed. Restaurants below 5% EBITDA have no buffer for unexpected costs. Focus first on your 5 top-selling dishes and bring them to maximum 32% food cost.
📚 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.
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