Most restaurant owners assume extended brunch hours automatically boost profits - but the math often tells a different story. Revenue increases don't always translate to higher margins when you factor in labor, utilities, and waste. The key lies in calculating your true break-even point before making the commitment.
The basics: what does an extra hour of brunch cost?
You'll need three core numbers: additional labor, extra food purchases, and projected revenue. Skip this foundation and you're essentially gambling with your margins.
💡 Example:
Restaurant with 40 seats considering brunch from 10:00 to 14:00 instead of 11:00 to 13:00:
- Extra staff: 1 chef + 1 server × 2 hours = €60
- Extra purchases (eggs, bread, fruit): €40
- Expected extra revenue: €180 (12 extra guests × €15 average)
Profit: €180 - €100 = €80 per day
Calculate your break-even point
Your break-even represents the exact moment additional revenue covers your extra expenses. From tracking this across dozens of restaurants, I've seen owners consistently underestimate their true costs by 15-20%.
Break-even formula:
Break-even guests = Extra costs / Average bill per guest
💡 Break-even example:
Extra costs per day: €100
Average brunch bill: €17.50
Break-even: €100 / €17.50 = 6 guests per day
Every guest beyond number six generates pure profit during those extended hours.
Calculate with realistic occupancy
Those first few weeks? They're typically slow. Build a ramp-up scenario into your projections: start conservative, then scale expectations gradually.
- Week 1-2: 30% of target occupancy
- Week 3-4: 50% of target occupancy
- Week 5-8: 70% of target occupancy
- From week 9 onwards: full occupancy
⚠️ Watch out:
Most restaurants calculate using full occupancy from day one. Reality check: customers need 2-3 months to discover your new hours.
Extra costs you often forget
Labor and food purchases are obvious. But these hidden expenses can quietly erode your margins:
- Energy: Two additional hours of lighting, coffee machines, ovens (€8-12/day)
- Cleaning: More dishes, extra table turnover (€15-20/day)
- Waste: Unsold brunch items at closing (5-10% of purchases)
- Marketing: Announcing new hours to customers (one-time €200-500)
Test with a temporary promotion
Launch a four-week trial run. You'll get real data without permanent commitment, and customers won't feel misled if you decide to pull back.
💡 Test period example:
4 weeks of extended brunch, track daily:
- Guest count during extended hours
- Average ticket size per customer
- Additional staff hours required
- End-of-day waste percentage
After 4 weeks: run your final profitability analysis
Digital support for your calculation
Food cost tracking tools like KitchenNmbrs help you monitor which brunch dishes deliver the highest margins. You can then optimize your menu mix for maximum profitability during those extended hours.
How do you calculate profitability? (step by step)
Calculate extra costs per day
Add up: extra staff, purchases, energy, and cleaning. These are your fixed costs that you incur every day, regardless of how many guests come.
Determine your break-even point
Divide extra costs by average bill per guest. You need at least this many guests to break even.
Estimate realistic occupancy
Calculate with a ramp-up scenario: first month 30-50% occupancy, then gradually more. Test for a month to get real numbers.
✨ Pro tip
Track your current Sunday brunch performance for 3 weeks, then extend those hours by one hour. If that single hour generates €50+ profit consistently, you're ready to expand to other days.
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 extra guests do I need to break even?
Divide your additional costs by your average check size. If you're spending €100 extra and your average brunch bill is €17.50, you need exactly 6 guests to cover costs.
Should I include VAT in my calculation?
Always work with VAT-exclusive numbers for accuracy. That €100 revenue including VAT becomes €91.74 excluding VAT at 9% rates. Calculate your profit margins from the net amount.
How long before extended hours become profitable?
Typically 6-12 weeks for full profitability. The first month rarely hits break-even since customers need time to discover your new schedule. Plan accordingly.
Which brunch dishes deliver the highest margins?
Egg-based dishes with bread and vegetables typically run 25-30% food cost. Meat and fish items often hit 35%+ food cost unless you can command premium pricing.
Can I use this method for extended dinner hours?
Absolutely - the formula works for any service extension. Just remember dinner staff costs more per hour and you'll likely need additional kitchen coverage.
What if my break-even point seems too high?
If you need 15+ guests daily to break even, your costs are probably too high. Look at reducing staff overlap or simplifying your extended-hours menu.
Should I factor in lost revenue from regular hours?
Yes, if extending brunch means shorter prep time for dinner service. Calculate any potential dinner revenue loss and add it to your extended brunch costs.
📚 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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