Last month, inflation forced another round of menu price adjustments across the industry. A 10% price increase sounds straightforward, but the impact on your total P&L is more complex than you'd expect. Your revenue doesn't always increase proportionally because you may lose customers, and the consequences for your profit can be dramatic.
The direct impact on your revenue
A 10% price increase doesn't automatically mean 10% more revenue. You need to account for customer loss due to higher prices.
💡 Example:
Restaurant with €50,000 monthly revenue increases all prices by 10%:
- Expected revenue: €55,000 (+10%)
- Customer loss: 15% fewer covers
- Actual revenue: €46,750 (-6.5%)
Result: lower revenue despite higher prices
Calculate your break-even point
The critical question: how many customers can you lose before a price increase becomes counterproductive? This depends on your current profit margin.
The formula:
Maximum customer loss % = (Price increase % / (100% + Price increase %)) × 100
💡 Example with 10% price increase:
Maximum customer loss = (10 / 110) × 100 = 9.1%
Lose more than 9.1% of your customers? Then your total revenue drops.
Impact on your costs
Not all costs change proportionally with your revenue. You'll need to distinguish between fixed and variable costs:
- Fixed costs stay the same: rent, insurance, fixed salaries
- Variable costs decrease: food cost, beverage purchases, variable staff
- Semi-variable costs: energy, water, waste
💡 Cost example:
With 15% fewer customers after price increase:
- Food cost: €15,000 → €12,750 (-15%)
- Variable staff: €8,000 → €6,800 (-15%)
- Rent: €5,000 → €5,000 (no change)
- Fixed salaries: €12,000 → €12,000 (no change)
The new profit calculation
Now you can calculate your new profit. Here's where it gets interesting: lower revenue with higher prices can still generate more profit due to lower variable costs. From tracking this across dozens of restaurants, I've seen profit margins improve even with 20% customer loss.
⚠️ Important:
Always calculate with prices excluding VAT. A €2.00 price increase on the menu is €1.83 excl. VAT at 9% VAT.
Scenario analysis: before and after
Always make a comparison between your current situation and the scenario after the price increase:
💡 Complete example:
Before price increase:
- Revenue: €50,000
- Food cost (30%): €15,000
- Staff: €20,000
- Other costs: €10,000
- Profit: €5,000 (10%)
After 10% price increase, 15% fewer customers:
- Revenue: €46,750
- Food cost: €12,750
- Staff: €18,800
- Other costs: €9,500
- Profit: €5,700 (12.2%)
Result: €700 more profit despite lower revenue
Timing and communication
The way you implement a price increase affects customer loss. Gradual increases often work better than one big jump.
- Don't raise all dishes at once
- Start with your most popular dishes (least resistance)
- Communicate added value, not just price increase
- Monitor your covers and revenue weekly
How do you calculate the P&L impact? (step by step)
Calculate your current profit margin
Add up all costs and subtract from your revenue. Note your profit percentage - this is your starting point. Distinguish between fixed costs (rent, insurance) and variable costs (food cost, variable staff).
Estimate customer loss
Determine what percentage of customers you'll likely lose. As a rule of thumb: with a 10% price increase, you lose 5-15% of your customers, depending on your concept and competition. Be realistic, not optimistic.
Calculate new revenue and costs
New revenue = (Old revenue × 1.10) × (1 - customer loss%). Variable costs decrease proportionally with customer loss. Fixed costs stay the same. Calculate what your new profit will be.
✨ Pro tip
Calculate the exact break-even point for your 5 highest-margin dishes within 48 hours. If customer loss stays below 12% after 3 weeks, you've found your sweet spot for future increases.
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
How many customers can I lose with a 10% price increase?
Maximum 9.1% to break even on revenue. But due to lower variable costs, you can often lose more customers and still make more profit.
Should I raise all prices at once?
No, start with your most popular dishes. They have the least price sensitivity. Increase gradually over 2-3 months to avoid customer shock.
How do I know if my price increase is successful?
Monitor your number of covers, average check value, and total profit weekly. After 4-6 weeks you'll see the real effect on your P&L.
What if my revenue drops after the price increase?
That can still be profitable due to lower variable costs. Calculate your new profit margin - it's often higher despite lower revenue.
📚 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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