A restaurant with €15,000 in inventory pays €900 annually in interest costs alone – money that could boost marketing or renovations. Most hospitality entrepreneurs stock 2-4 weeks of inventory when 1 week often suffices. You can halve your inventory value without compromising kitchen operations.
What is tied-up working capital in inventory?
Tied-up working capital represents money frozen in your inventory. Every euro of ingredients sitting in your cooler and storage areas is cash you can't deploy elsewhere. The real costs include:
- Interest costs: If you use credit, you're paying interest on inventory money
- Opportunity costs: Money you can't invest in marketing or renovations
- Spoilage and waste: Longer inventory sits, higher the loss risk
? Example:
Restaurant with €15,000 inventory value at 6% interest:
- Interest costs per year: €900
- Spoilage and loss (5%): €750
- Total costs: €1,650 per year
By halving inventory you save €825 per year
Calculate your current inventory turnover
Before optimizing, you need to understand how quickly your inventory rotates. The inventory turnover formula is:
Inventory turnover = Annual purchases / Average inventory value
Strong inventory turnover for restaurants falls between 15-25 times yearly. That translates to 2-3 weeks of inventory.
? Example calculation:
Restaurant with €200,000 annual purchases:
- Current inventory value: €20,000
- Inventory turnover: €200,000 / €20,000 = 10x per year
- That's 5.2 weeks of inventory (52 weeks / 10)
Excessive! Target 15-20x turnover (2.6-3.5 weeks of inventory)
Identify slow-movers and dead stock
Not all inventory rotates equally. Analyze by product category:
- Fresh products: Must be consumed within 3-5 days
- Meat and fish: Maximum 1 week inventory
- Dry goods: 2-4 weeks inventory acceptable
- Beverages: Can last longer, but tie up significant capital
⚠️ Watch out:
Identify which products have been sitting in your inventory for weeks. These 'slow-movers' cost you most in tied-up capital and spoilage risk.
Optimize your ordering frequency
Increase delivery frequency to slash inventory levels:
- Fresh products: Order 3-4x per week instead of once
- Meat and fish: Order 2x per week instead of weekly
- Dry goods: Order every other week instead of monthly
Sure, this means more deliveries and potentially higher delivery costs. But savings on tied-up capital typically exceed these expenses. Most kitchen managers discover too late that frequent small orders beat bulk purchasing for cash flow.
? Calculation example:
From 1x to 2x per week ordering:
- Inventory reduction: 50% (from 7 to 3.5 days)
- Extra delivery costs: €20 per week = €1,040 per year
- Savings on tied-up capital: €5,000 x 6% = €300
- Less spoilage: €2,500 x 3% = €75
Net costs: €665 per year, but much improved cashflow
Use ABC analysis for prioritization
Focus attention on products that tie up most capital:
- A-products (80% of value): Daily check, minimal inventory
- B-products (15% of value): Weekly check, limited inventory
- C-products (5% of value): Monthly check, bulk purchasing allowed
Usually your priciest meat, fish and beverage products fall into A-category. Here's where you'll find the biggest optimization gains.
Implement just-in-time principles
Align purchasing with expected sales:
- Daily sales forecast: How many covers do you expect?
- Menu analysis: Which dishes sell most?
- Seasonal patterns: Summer vs. winter, weekday vs. weekend
⚠️ Watch out:
Start cautiously with just-in-time. Better slightly too much than running out. Gradually build confidence in suppliers and forecasts.
Measure and monitor your progress
Track inventory performance monthly:
- Inventory value: Count total inventory monthly
- Inventory days: (Inventory value / Daily purchases)
- Spoilage percentage: How much gets thrown away?
- Stockout incidents: How often do you run out?
Systems like KitchenNmbrs can track these figures automatically and spot trends, eliminating manual counting and calculations.
How to reduce tied-up working capital? (step by step)
Count your current inventory value
Go through your cooler, freezer and warehouse. Add up what everything is worth at purchase price. This is your starting point for improvement.
Calculate your inventory turnover
Divide your annual purchases by your average inventory value. Below 15x per year means too much tied-up capital.
Identify your most expensive products
Make a list of products that cost more than €500 per month. These are your A-products where optimization yields the most.
Increase delivery frequency
Order your A-products more frequently in smaller quantities. From weekly to 2x per week can already halve your inventory.
Measure your progress monthly
Track whether your inventory value is decreasing and your turnover is improving. Aim for 15-25x turnover per year for optimal cashflow.
✨ Pro tip
Track your inventory-to-sales ratio weekly for 8 weeks running. If you consistently carry more than 1.5x your weekly sales volume in stock, you're tying up excess working capital that could generate 6-8% returns elsewhere.
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 supplier has minimum order quantities?
How do I prevent running out of stock with less inventory?
Which products should I optimize first?
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
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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