Bottomless brunch success hinges on precise consumption calculations that protect your profit margins. Too many restaurants jump into unlimited offerings without proper cost analysis, watching profits disappear with each refill. Master these calculations and your bottomless service becomes a reliable revenue generator.
What is maximum consumption at bottomless brunch?
Maximum consumption represents your profit threshold - the exact point where guest consumption still generates money rather than losses. Cross this line and each additional drink or plate costs you profit.
Smart bottomless operators track:
- Maximum number of prosecco glasses per person
- Maximum amount of food per person
- Time limit to restrict overconsumption
Calculate your break-even point per person
Break-even marks where costs match revenue. Stay below this threshold and profit flows; exceed it and losses mount quickly.
? Example break-even calculation:
Bottomless brunch price: €35.00 per person (incl. 9% VAT)
- Selling price excl. VAT: €35.00 / 1.09 = €32.11
- Desired profit margin: 35%
- Maximum costs: €32.11 × 0.65 = €20.87
You can spend a maximum of €20.87 in costs per person
Divide costs between food and drinks
Bottomless typically combines fixed food portions with unlimited beverages. After managing kitchen operations for nearly a decade, I've learned that smart cost allocation between these elements makes or breaks profitability.
? Example cost division:
Maximum costs per person: €20.87
- Food (fixed): €12.00 (bread, toppings, fruit)
- Remaining for drinks: €20.87 - €12.00 = €8.87
- Prosecco purchase: €3.50 per bottle (6 glasses)
- Cost per glass: €3.50 / 6 = €0.58
Maximum number of glasses: €8.87 / €0.58 = 15 glasses
Set a safe limit
Your calculated maximum isn't your operational limit. Build in safety margins because real-world costs fluctuate.
⚠️ Note:
Set your limit at 80% of your maximum. At 15 glasses maximum → practical limit of 12 glasses. This keeps margin for unexpected costs.
Limit consumption with smart tricks
Beyond hard limits, you can naturally reduce consumption without guests feeling restricted:
- Time limit: 2.5 hours maximum naturally keeps consumption limited
- Smaller glasses: 125ml instead of 150ml prosecco per glass
- Slower service: don't refill immediately, ask first
- Food first: full feeling limits drink consumption
? Example time limit effect:
At 2.5 hour bottomless brunch:
- Average 1 glass per 20 minutes = 7-8 glasses
- First 30 min: eating (less drinking)
- Last 30 min: winding down (less drinking)
Practical consumption: 6-7 glasses per person
Monitor your actual consumption
Track real consumption patterns to refine your formula and spot profit leaks before they grow.
Measure weekly:
- Average glasses per person
- Highest consumption (outliers)
- Total costs vs. income bottomless brunch
- Which day/time has the most consumption
Related articles
How do you calculate maximum consumption? (step by step)
Calculate your maximum costs per person
Subtract VAT from your selling price and determine what percentage can go to costs. At €35 incl. VAT and 65% costs = €20.87 maximum.
Divide costs between food and drinks
Subtract fixed food costs from your maximum. The remainder is available for unlimited drinks. For example €12 food, €8.87 for drinks.
Calculate maximum number of consumptions
Divide your drink budget by cost per glass. At €8.87 budget and €0.58 per glass prosecco = maximum 15 glasses per person.
✨ Pro tip
Track consumption for your first 3 weeks and calculate the 90th percentile - this becomes your safe operational limit. Most guests consume 6-8 glasses, but planning for the heaviest 10% protects your margins.
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Frequently asked questions
What if guests consume more than my maximum?
Should I include VAT in my cost calculation?
How do I prevent people from abusing bottomless?
What profit margin should I maintain for bottomless brunch?
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
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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