78% of restaurants fail within their first five years, often because owners don't spot loss-making days until it's too late. You're busy, the place feels full, but certain days just don't generate enough profit. Here's how to identify exactly which days are bleeding money and why it's happening.
Why some days drain your profits
Not every day operates the same in hospitality. Monday's rhythm differs completely from Saturday's hustle. And sometimes you think business is solid, but the numbers tell a different story.
- Reduced revenue from fewer covers
- Identical fixed expenses (rent, staff wages, utilities)
- Inflated purchasing due to supplier minimums
- Increased waste from overestimating demand
⚠️ Note:
Most operators fixate on revenue alone. But revenue isn't profit. A €800 revenue day can deliver less profit than one generating €600.
Essential numbers you need
To determine if a day generates profit, track these metrics:
- Daily revenue (excluding VAT)
- Variable daily costs (food, beverage, delivery)
- Fixed daily costs (rent, wages, utilities)
- Cover count per day
💡 Example calculation:
Monday at bistro The Fork:
- Revenue: €450 excl. VAT
- Food costs: €135 (30% cost ratio)
- Labor: €180 (1 chef, 1 server)
- Fixed expenses: €85 (rent, utilities, etc.)
Profit: €450 - €135 - €180 - €85 = €50
That's just 11% margin. Far too thin for sustainable operations.
Converting fixed costs to daily figures
Your fixed expenses continue regardless of how busy you are. So you must break them down into daily amounts.
- Monthly rent ÷ operating days
- Monthly insurance ÷ operating days
- Monthly depreciation ÷ operating days
- Base staffing costs per shift
💡 Example fixed costs:
Restaurant operating 6 days weekly (26 days monthly):
- Rent: €2,600/month = €100/day
- Insurance: €260/month = €10/day
- Base utilities: €390/month = €15/day
- Core staff: €160/day
Total fixed costs: €285/day
This means you must generate at least €285 daily before seeing any profit.
Daily break-even calculation
Your break-even point represents zero profit, zero loss territory. Revenue above this threshold creates profit; below it generates losses.
Formula:
Break-even revenue = Daily fixed costs ÷ (1 - Variable cost %)
💡 Break-even calculation:
Using previous examples:
- Daily fixed costs: €285
- Variable costs: 30% (food ratio)
Break-even: €285 ÷ (1 - 0.30) = €285 ÷ 0.70 = €407 daily
Any day under €407 revenue creates losses. Above that generates profit.
Red flags indicating loss-making days
From tracking this across dozens of restaurants, these patterns consistently signal structural losses on specific days:
- Weak per-cover revenue: Customers spending less individually
- Inflated food cost percentage: Over 35% of revenue going to ingredients
- Overstaffing for covers: Labor costs exceeding what revenue supports
- Excessive waste: Ordering too much for actual guest count
⚠️ Note:
A 20-cover day generating €600 (€30 per person) often outperforms a 40-cover day with €800 revenue (€20 per person).
Solutions for unprofitable days
Once you've identified structurally unprofitable days, consider these adjustments:
- Close entirely: If losses exceed fixed costs
- Reduce staffing: Schedule minimal team
- Simplify menu: Offer dishes with better margins
- Create promotions: Drive traffic during slow periods
- Alternative concepts: Delivery, catering, or private events
Food cost management tools like KitchenNmbrs automatically display daily profitability, letting you quickly pivot if any day drops below break-even.
How do you calculate profit per day? (step by step)
Gather your daily figures
Record for each day: revenue excl. VAT, number of covers, staff costs and estimated ingredient costs. Start with a week of data to see patterns.
Calculate your fixed costs per day
Divide your monthly fixed costs (rent, insurance, base energy) by the number of opening days. Add your minimum staff costs per day to that.
Calculate profit per day
Subtract from your daily revenue: ingredient costs + staff costs + fixed costs per day. Is the number positive? Then you make a profit. Negative? Then a loss.
Determine your break-even point
Use the formula: fixed costs per day / (1 - food cost percentage). This is the minimum revenue you need to break even.
Analyze patterns by day of week
Compare different Mondays, Tuesdays etc. Which days are structurally below your break-even? Those are costing you money and deserve attention.
✨ Pro tip
Track your profit margins for the past 30 days and identify your 3 most profitable days. What specific factors made those days successful? Replicate those conditions more frequently.
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 often should I analyze daily profit margins?
Review your past 7 days every week. This frequency lets you spot consistently underperforming days and make quick adjustments before losses compound.
What if every single day shows losses?
Your fixed costs are excessive or prices are too low. Calculate your actual food costs first, then verify you have adequate margins on each dish. You might need to restructure fundamentally.
Should I close completely on loss-making days?
Only if losses exceed your fixed costs for that day. Usually it's smarter to run skeleton staff or create a limited menu for slower periods.
How do I calculate food cost percentage accurately per day?
Total all ingredient costs used that specific day, divide by revenue excluding VAT, then multiply by 100. Track this daily rather than weekly for precision.
📚 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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