Here's something most restaurant owners don't realize: that modest 5% price bump can quietly add thousands to your annual profit. Yet most of us adjust prices on gut feeling alone, never calculating the real financial impact. Today we'll break down exactly how to measure what a price increase will do to your bottom line.
Why calculating margin impact matters
Before you raise prices, you want to know what it'll actually bring in. A 5% increase on your top sellers often delivers more profit than a 20% bump on dishes that barely move.
The total margin impact hinges on three key factors:
- How much you sell of each dish
- Your current margin per dish
- The percentage of price increase
Identify your top sellers
Start with your 5-10 best-selling dishes. These drive the biggest impact on your total profit.
💡 Example top sellers:
- Steak: 25 portions per week
- Pasta carbonara: 30 portions per week
- Salmon: 20 portions per week
- Caesar salad: 15 portions per week
- Risotto: 18 portions per week
Calculate the current margin per dish
For each top seller you'll need:
- Current selling price (excl. VAT)
- Ingredient cost per portion
- Margin per portion = selling price - ingredient costs
💡 Example steak:
Current situation:
- Menu price: €32.00 incl. VAT = €29.36 excl. VAT
- Ingredient costs: €10.50
- Margin per portion: €29.36 - €10.50 = €18.86
Calculate the new margin after price increase
With a 5% price increase, only your selling price changes. Ingredient costs stay put.
Formula for new selling price:
New price excl. VAT = Old price excl. VAT × 1.05
💡 Example steak after 5% increase:
- New price excl. VAT: €29.36 × 1.05 = €30.83
- New menu price incl. VAT: €30.83 × 1.09 = €33.60
- Ingredient costs: €10.50 (unchanged)
- New margin: €30.83 - €10.50 = €20.33
Extra margin per portion: €20.33 - €18.86 = €1.47
Calculate the total impact per week and year
After managing kitchen operations for nearly a decade, I've learned that this step separates profitable decisions from costly mistakes. Multiply the extra margin per portion by your actual sales volume.
Formula:
Extra profit per week = Extra margin per portion × Portions per week
💡 Total impact all top sellers:
- Steak: €1.47 × 25 = €36.75 per week
- Pasta: €1.20 × 30 = €36.00 per week
- Salmon: €1.65 × 20 = €33.00 per week
- Caesar: €0.95 × 15 = €14.25 per week
- Risotto: €1.10 × 18 = €19.80 per week
Total per week: €139.80
Per year (52 weeks): €7,270
⚠️ Note:
This calculation assumes sales remain steady. In reality, higher prices can affect demand. Monitor your sales figures closely after any price adjustment.
Is a price increase worth it?
A price increase makes financial sense if:
- Your food cost exceeds 35% (you're not earning enough)
- Your suppliers have raised their prices
- Your competitors charge similar amounts
- The extra profit outweighs possible customer loss
If you earn an extra €7,270 annually with the example above, but lose 10% of your customers, you'll need to weigh whether it's worthwhile.
Tools to calculate this automatically
Manual calculations eat up time, especially with extensive menus. A system like tools like KitchenNmbrs automatically calculates what a price increase will generate across all your dishes simultaneously.
You immediately see which dishes deliver the biggest impact and can test different scenarios before making your final decision.
How do you calculate the margin impact of a price increase?
Make a list of your 5-10 top sellers
Note per dish: current selling price (excl. VAT), ingredient costs and number of sales per week. Focus on dishes you sell most often, as these have the biggest impact.
Calculate the new selling price per dish
Multiply your current price excl. VAT by 1.05 (for a 5% increase). Then calculate the new margin: new price minus ingredient costs.
Calculate the extra profit per dish
Subtract the old margin from the new margin. This gives you the extra profit per portion. Multiply by the number of sales per week for the total impact.
Add everything together
Sum the extra profit from all top sellers. Multiply by 52 for the annual impact. This gives you the total financial effect of your price increase.
✨ Pro tip
Run your margin calculations on your 15 highest-volume dishes from the past 8 weeks, not just the obvious bestsellers. You'll often discover that a 3% increase on moderate performers delivers more profit than aggressive pricing on slow movers.
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
Should I include VAT in my calculation?
Always calculate with prices excl. VAT. You'll pass the VAT on to your customers anyway, so it doesn't count toward your margin. For food that's 9% VAT in the Netherlands.
What if my sales drop because of the price increase?
Monitor your sales figures during the first month after the increase. If you earn 5% more per dish but sell 10% less, you're losing money. Usually the impact is smaller than restaurant owners expect.
Can I use different percentages per dish?
Absolutely, you can determine how much to increase per individual dish. Dishes with low margins can handle larger increases than those with already strong margins. Just keep your menu pricing clear and logical.
When is the optimal time for a price increase?
Often with a new menu launch, seasonal change, or after supplier price increases. Avoid your busiest periods and communicate transparently to your customers why you're adjusting prices.
How often should I adjust my prices?
Review at least twice per year whether your prices still match your costs. If suppliers raise prices or your food cost climbs above 35%, adjustment is necessary to maintain profitability.
How do I handle customer complaints about higher prices?
Be honest about rising costs and focus on the value you provide. Most customers understand reasonable increases, especially if your food quality and service remain excellent.
Should I increase all dishes by the same percentage?
Not necessarily. Focus increases on high-volume items and dishes with thin margins. Low-selling items might handle bigger increases without affecting overall revenue significantly.
📚 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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