Most restaurants either drown in excess inventory or run out of key ingredients at the worst possible moment. The maximum stock level determines exactly how much you should stock of each product. Here's how to calculate this for your kitchen.
Why a maximum stock level matters
Without a maximum you'll over-order. Products spoil, you tie up too much cash in inventory, and your cooler overflows. With a properly calculated maximum you control your cashflow and prevent waste.
💡 Example:
A bistro uses 15 kg beef tenderloin per week. Supplier delivers 2x weekly. Shelf life: 10 days.
- Weekly consumption: 15 kg
- Daily consumption: 15 ÷ 7 = 2.1 kg
- Maximum stock: 10 days × 2.1 kg = 21 kg
So you never stock more than 21 kg beef tenderloin.
The formula for maximum stock level
Your maximum stock level depends on three factors:
- Daily consumption - how much you use on average per day
- Delivery frequency - how often your supplier comes
- Shelf life - how long the product stays good
The basic formula is:
Maximum stock = Daily consumption × Minimum shelf life
⚠️ Note:
Always use the shortest shelf life. If beef tenderloin lasts 14 days but your cooler's unreliable and you want to use it within 8 days, calculate with 8 days.
Different product types, different calculations
Not every product follows the same logic. Here are the main categories:
Fresh products (meat, fish, vegetables)
- Short shelf life (2-7 days)
- Calculate conservatively: use 70% of the official shelf life
- Example: fish lasts 4 days → calculate with 3 days
Shelf-stable products (pasta, rice, canned goods)
- Long shelf life (months/years)
- Maximum determined by storage space and cashflow
- Standard: 4-8 weeks of inventory
Frozen products
- Shelf life often 3-12 months
- Maximum determined by freezer space
- Note: energy costs of large freezers
💡 Example calculation fresh salmon:
Restaurant uses 8 kg salmon per week, supplier delivers 3x weekly:
- Daily consumption: 8 ÷ 7 = 1.14 kg
- Salmon shelf life: 4 days
- Conservative shelf life: 4 × 0.7 = 2.8 days
- Maximum stock: 1.14 × 2.8 = 3.2 kg
Never stock more than 3.2 kg salmon.
Account for seasons and fluctuations
Your consumption isn't consistent every day. Summer means more salads, winter brings stew season. Adjust your maximum per season:
- Summer maximum - calculate with peak summer consumption
- Winter maximum - calculate with peak winter consumption
- Weekend maximum - if your weekends are significantly busier
Review your numbers every 3 months and adjust where needed.
Practical control in the kitchen
One of the most common blind spots in kitchen management is having maximums on paper but not enforcing them in daily operations. A maximum on paper only helps if you actually use it. Here's how:
- Stick labels on your cooler with the maximum per product
- Train your buyer to never order above the maximum
- Check weekly: which products are at the maximum
- Use tools like KitchenNmbrs to track your stock levels
⚠️ Note:
A maximum is a guideline, not a law. For special events or promotions you can temporarily order more. Just make sure you've got a plan to use it up.
Costs of too much inventory
Why is a maximum so important? Because excess inventory directly costs money:
💡 Cost example:
Restaurant has €15,000 in inventory, should be €8,000:
- Excess tied up: €7,000
- Lost interest (5% per year): €350
- Extra spoilage (5%): €350
- Total annual costs: €700
That's €58 per month in unnecessary costs.
How do you calculate the maximum stock level? (step by step)
Calculate your daily consumption per product
Look at your consumption from the past 4 weeks. Add it up and divide by 28 days. This gives you average daily consumption. Also check your peak days to see if you need seasonal adjustments.
Determine the practical shelf life
Don't use the official shelf life, but how long you actually want to keep the product. For fresh products: use 70% of the official date. If unsure about your cooler: be more conservative.
Multiply daily consumption by shelf life
The formula: daily consumption × practical shelf life = maximum stock. Round down for fresh products, up for shelf-stable products. Write down the maximum and post it with your inventory.
✨ Pro tip
Start with your 3 most expensive proteins and calculate their maximums over the next 7 days. These items typically represent 40-60% of your inventory value, so getting them right creates immediate impact.
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
What if my consumption fluctuates strongly by season?
Calculate different maxima per season. Use your summer consumption in summer, winter consumption in winter. Check every 3 months if your maxima are still correct and adjust where needed.
Should I calculate a safety stock on top of my maximum?
No, your maximum IS your safety stock. If your supplier's reliable, you don't need an extra buffer. With unreliable suppliers: increase your maximum by 20-30%.
How often should I update my maximum stock levels?
Review every 3 months if your consumption figures are still accurate. With new dishes on your menu or supplier changes: adjust immediately. Seasonal products need updates at the start of each season.
What if I get a good deal from my supplier?
A maximum is a guideline, not a law. With deals you can temporarily order more, but make sure you've got a plan to use it up. Calculate if the discount outweighs the risk of spoilage.
📚 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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