Running a restaurant is like juggling flaming torches while riding a unicycle - there's never enough time for everything. The 80/20 rule becomes your safety net: focus on the 20% of dishes generating 80% of your revenue. Smart shortcuts reveal profitability without drowning in spreadsheets.
Focus on your top 5 revenue drivers
Got 40 dishes but no time? Target the 5 you sell most. These typically generate 60-70% of your food revenue - that's where your profits live or die.
💡 Example:
Restaurant De Smaak serves 35 dishes, but these 5 drive 65% of food revenue:
- Steak: 25% of food revenue
- Salmon: 15% of food revenue
- Pasta carbonara: 12% of food revenue
- Burger: 8% of food revenue
- Caesar salad: 5% of food revenue
Calculating just these 5 gives the owner control over 65% of profit.
Apply quick estimates for lower-volume dishes
For dishes that don't sell frequently, rough calculations work fine. Not perfect, but fast insights beat no insights.
- Meat dishes: estimate 30-35% food cost
- Fish dishes: estimate 32-38% food cost
- Vegetarian dishes: estimate 25-30% food cost
- Pastas: estimate 22-28% food cost
⚠️ Note:
These estimates work only for low-volume dishes. Always calculate your bestsellers precisely - they're too important to guess.
Schedule monthly price reviews
You don't need weekly recalculations. Block out time once monthly (say, first Monday) for price analysis. A pattern we see repeatedly in restaurant financials shows that monthly reviews catch 90% of pricing issues before they hurt profits.
💡 Example monthly review:
Owner Marco reserves 2 hours every first Monday for price control:
- 30 min: recalculate top 5 dishes
- 30 min: review supplier pricing changes
- 30 min: set new menu prices
- 30 min: update systems
Result: current pricing without daily stress.
Red flags requiring immediate attention
Some situations can't wait for your monthly review. Watch for these warning signs:
- Supplier price hikes: immediately recalculate affected dishes
- Shrinking margins: recalculate your top 3 performers
- Competitor price cuts: verify you're still profitable
- Seasonal shifts: ingredient costs can swing dramatically
Technology speeds everything up
Manual calculations eat time. Systems automatically update food costs when purchase prices change, so you instantly spot dishes becoming unprofitable.
💡 Example time savings:
Restaurant owner Lisa uses automated calculations:
- Manual calculation of 25 dishes: 3 hours
- With automation: 15 minutes (update purchase prices only)
Time saved: 2 hours 45 minutes monthly.
The 5-minute daily pulse check
Even without full calculations, monitor these 3 metrics daily:
- Yesterday's revenue: compare to last week's same day
- Cover count: more guests but flat revenue means lower check averages
- Waste tracking: what got tossed and why?
This 5-minute habit prevents nasty surprises.
How do you quickly get a grip on your profitability? (step by step)
Identify your top 5 best-selling dishes
Check your POS system or manually count which 5 dishes you sell most often. These probably make up 60-70% of your food revenue. Focus on these dishes first.
Calculate the exact food cost of your top 5
Add up all ingredient costs per dish and divide by the selling price excl. VAT. Multiply by 100 for the percentage. Aim for 28-35% food cost.
Use rules of thumb for the remaining dishes
For less popular dishes use rough estimates: meat 30-35%, fish 32-38%, vegetarian 25-30%. This gives quick insight without hours of calculating.
Schedule a 2-hour monthly review
Block off 2 hours every first Monday to check purchase prices and recalculate your top 5. Adjust prices where needed. This prevents you from running at a loss for months.
Do a 5-minute daily check
Check your revenue from yesterday, number of covers, and what was wasted each morning. This takes 5 minutes but prevents big surprises at the end of the month.
✨ Pro tip
Recalculate your 3 highest-revenue dishes every 2 weeks. If those stay profitable, you've protected roughly 45% of your income without touching the other 30+ items.
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
Isn't it risky not calculating everything precisely?
Your top 5 dishes need exact calculations - they drive 60-70% of revenue. For lower-volume items, estimates work temporarily if you review them regularly.
How do I identify my bestselling dishes?
Pull sales reports from your POS system by dish volume. No POS? Track manually for one week which dishes you prepare most frequently.
What if my food cost exceeds 35%?
You're likely losing money on that dish. Raise the price, reduce portions, or source cheaper ingredients. Ignoring it destroys profit margins.
Can I just eyeball costs without any calculations?
Guessing usually backfires badly. Many owners think they're at 25% food cost but actually hit 40%. That gap costs thousands annually.
Should I calculate food costs for seasonal specials?
Absolutely, especially if they use expensive seasonal ingredients. Limited-time dishes can either boost profits significantly or drain them if priced wrong.
What if customers resist price increases?
Better some complaints than bankruptcy. Explain ingredient cost increases - most customers understand if you maintain quality and service standards.
📚 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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