Most restaurant owners believe passion and good food guarantee success, but 60% fail within three years due to poor financial planning. Your concept might sound amazing, but without knowing exactly how many guests you need daily to stay afloat, you're gambling with your savings. The math doesn't lie - and it'll save you from costly mistakes.
Gather your basic financial data
You can't assess feasibility without knowing your true costs. Create a detailed budget that covers everything - and I mean everything.
💡 Example: Bistro in city center (80 seats)
Monthly fixed costs:
- Rent: €4,500
- Staff (fixed): €12,000
- Insurance: €800
- Energy: €1,200
- Other costs: €1,500
Total fixed costs: €20,000 per month
Don't skip the small stuff. From analyzing actual purchasing data across different restaurant types, those "minor" expenses like accounting fees, equipment depreciation, and cleaning supplies can push your break-even point up by 15-20%. Include everything or your calculations will be dangerously optimistic.
Calculate your break-even point in number of guests
Now reality hits. You need this formula burned into your brain:
Break-even guests per month = Fixed costs / (Average bill - Variable costs per guest)
💡 Example calculation:
Bistro data:
- Fixed costs: €20,000
- Expected average bill: €28.00
- Food cost (30%): €8.40
- Extra staff busy days: €3.00 per guest
- Total variable costs: €11.40
Break-even: €20,000 / (€28.00 - €11.40) = 1,205 guests per month
That's 40 guests daily if you're open 30 days. Sounds doable? Maybe. But first, you need to prove your location can actually deliver those numbers.
Analyze your target audience and location potential
Time for some detective work. Your gut feeling about "busy foot traffic" won't pay the bills - you need hard data.
- Count foot traffic: Stand there with a clicker for a full week, different times and days
- Study the competition: How packed are similar places during lunch and dinner rushes?
- Profile your audience: Can the people in this area actually afford your prices?
- Spot seasonal trends: Tourist zones can be gold mines in summer, ghost towns in winter
⚠️ Watch out:
Entrepreneurs consistently overestimate conversion rates. See 1,000 people walking by? You'll be lucky to convert 1-3% into paying customers. Be brutal with your estimates.
Test different scenarios
Hope for the best, plan for the worst. Build three scenarios so you know exactly what you're risking.
💡 Example scenarios bistro:
Pessimistic: 25 guests/day = €700 revenue = €21,000/month
Realistic: 40 guests/day = €1,120 revenue = €33,600/month
Optimistic: 60 guests/day = €1,680 revenue = €50,400/month
Break-even hits at €33,600, so your realistic scenario better be rock-solid.
Validate your assumptions with market research
Your spreadsheet looks perfect, but does it match reality? Get out there and test your assumptions before signing any leases.
- Interview potential customers: How much do they currently spend dining out weekly?
- Network with other owners: Find non-competing restaurants and ask about their real numbers
- Mine online reviews: What makes people choose one place over another?
- Run a trial: Pop-ups and test events reveal more than any survey
Once you're operating, tracking tools help monitor if your original projections were accurate. You'll quickly see if your assumptions need adjusting.
How do you calculate feasibility? (step by step)
Calculate your total monthly fixed costs
Add up all costs you have every month, regardless of how many guests you serve. Think about rent, fixed staff, insurance, energy, and depreciation. Don't forget any cost item.
Determine your average bill and variable costs per guest
Realistically estimate what a guest spends on average. Subtract the variable costs (food cost, extra staff, dishwashing). The remaining amount is your contribution to fixed costs per guest.
Calculate how many guests you need at minimum
Divide your fixed costs by your contribution per guest. This gives you your break-even point in number of guests per month. Check whether this is realistic for your location and target audience.
✨ Pro tip
Survey 50 potential customers within a 3-block radius of your proposed location over 2 weeks. Ask about their current dining frequency and spending habits - you'll get real conversion data instead of guessing.
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
Which costs should I include in my calculation?
Include every single fixed expense: rent, salaries, insurance, utilities, phone, internet, equipment depreciation, accounting fees, cleaning, and maintenance. Add a 10% buffer for unexpected costs. Those "small" items you forget can easily add €2,000-3,000 monthly.
How do I know if my average bill is realistic?
Check menus of similar restaurants in your area and calculate their average spend. Test your proposed prices with potential customers through surveys or focus groups. If competitors average €20 and you're planning €35, you better have a compelling reason why.
What if my break-even point exceeds what the location can deliver?
Your concept isn't viable at that location - period. You can cut costs, raise prices, or find a better spot, but don't proceed hoping things will work out. It's cheaper to pivot now than close in six months.
Should I account for seasonal fluctuations in my calculations?
Absolutely critical, especially in tourist areas or business districts. Create separate projections for peak and slow seasons - the difference can be 300-400%. Build cash reserves during good months to survive the lean periods.
📚 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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