Many restaurant owners think inventory costs are just part of doing business - but that's wrong. Your menu size directly controls how much cash you tie up in ingredients. A 30-dish menu can lock up twice as much capital as a 15-dish menu, even with identical revenue.
Why menu size determines your inventory costs
Every single dish on your menu demands specific ingredients. More dishes mean more products to buy and store. This doesn't just increase purchasing amounts - it multiplies spoilage risk too.
💡 Example:
Restaurant A has 15 dishes, Restaurant B has 35 dishes:
- Restaurant A: 45 different ingredients, starting inventory €8,500
- Restaurant B: 95 different ingredients, starting inventory €18,200
Restaurant B has more than double the inventory costs!
The 80/20 rule for menus
Most restaurants see 20% of dishes generate 80% of sales volume. Yet owners stock everything equally. That's expensive.
- Top sellers: Keep 3-4 weeks inventory of your bestsellers
- Average dishes: 2 weeks inventory works fine
- Specialties: 1 week inventory, reorder frequently
⚠️ Watch out:
Many new restaurant owners buy too much of specialty items they sell 1-2 times a week. That money is better spent on marketing or staff.
Starting inventory calculation by menu size
Your starting inventory depends on expected revenue and dish count. From years of working in professional kitchens, I've seen restaurants fail because they tied up too much cash in ingredients that barely moved.
💡 Example calculation:
Expected revenue: €25,000/month, 20 dishes on menu:
- Food cost 30% = €7,500/month in ingredients
- For 2.5 weeks inventory: €7,500 ÷ 4.3 × 2.5 = €4,360
- Plus 20% buffer for seasonal products = €5,230
Starting inventory: approximately €5,200
Different strategies by menu type
Small menu (10-15 dishes):
- Fewer ingredient varieties
- Bigger volumes per ingredient
- Better purchase prices through bulk buying
- Starting inventory: 15-20% of monthly revenue
Large menu (25+ dishes):
- Many ingredients in small volumes
- Higher per-unit costs
- Greater waste risk
- Starting inventory: 25-30% of monthly revenue
💡 Real-world example:
Pizzeria with 12 pizzas vs. restaurant with 30 dishes, both €20,000 revenue/month:
- Pizzeria: 25 ingredients, starting inventory €3,200
- Restaurant: 75 ingredients, starting inventory €5,800
The restaurant has 80% higher inventory costs at identical revenue.
Cashflow impact of your choice
Starting inventory locks up capital you can't use elsewhere. Large menus trap more money in ingredients that might sit idle.
- Small menu advantage: Less tied-up capital, faster turnover
- Small menu downside: Limited guest options
- Large menu advantage: More variety, broader appeal
- Large menu downside: More capital locked up, complex purchasing
How do you calculate the right starting inventory? (step by step)
Count your menu items and categorize them
Make a list of all dishes and divide them into: top sellers (expect 60% of sales), average (30% of sales), specialties (10% of sales). This determines how much inventory you need per category.
Calculate your monthly ingredient needs
Take your expected monthly revenue × 30% food cost = monthly ingredient costs. For €20,000 revenue, this means €6,000 in ingredients per month.
Determine inventory weeks per category
Top sellers: 3 weeks inventory, average dishes: 2 weeks, specialties: 1 week. Add these up weighted by expected sales to get your total starting inventory.
✨ Pro tip
Track your actual dish sales for 30 days before setting permanent inventory levels. You'll discover that 3-4 dishes likely drive 60% of your ingredient needs, allowing you to stock those heavily while keeping specialty items minimal.
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 dishes can I have maximum without holding too much inventory?
For small restaurants, 15-20 dishes is often the ceiling before inventory costs spiral. Larger establishments can handle 25-30 dishes, but your revenue needs to support that complexity.
What if I have seasonal dishes that aren't always available?
Don't include seasonal items in your base inventory calculations. Buy these ingredients only during season when you're confident about moving them within 2-3 weeks.
Can I start with less inventory and reorder as needed?
Absolutely, and that's smarter. Begin with 1-2 weeks inventory of your proven sellers and restock based on real sales data. This prevents waste and preserves startup capital.
How do I know if my inventory is too large?
If you're discarding spoiled ingredients regularly, or if inventory value exceeds 25% of monthly revenue, you've overbought. Track this metric weekly to stay on top of it.
Should I stock ingredients for dishes that sell once per week?
No, that's a cash trap. Buy fresh ingredients for slow-moving dishes only when ordered, or temporarily remove them from the menu if ingredients aren't available.
What's the minimum inventory turnover rate I should target?
Aim for inventory turnover every 10-14 days for perishables and 3-4 weeks for dry goods. Faster turnover means better cash flow and fresher ingredients for your guests.
📚 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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