Most restaurants maintain inventory variances between 2% and 8% of purchases - the kind of buffer that accounts for natural spoilage without destroying your margins. Products spoil, packages tear, and prep waste happens in every kitchen. The trick is knowing where normal ends and profit loss begins.
What are normal inventory variances per product group?
Different products have different loss rates. Fresh items spoil faster, while dry goods can sit for months without issue.
💡 Common percentages per product group:
- Fresh vegetables and fruit: 8-15%
- Meat and fish: 3-8%
- Dairy: 2-5%
- Dry products (pasta, rice): 1-3%
- Frozen: 2-4%
Numbers above these ranges mean you're bleeding money. Below them? That's fine, but make sure you're not under-ordering and running out of key ingredients during service.
How do you calculate your inventory variance?
You'll need three numbers: opening inventory, purchases, and closing inventory. The gap between what should be there and what actually remains represents your loss.
💡 Example calculation:
Last Monday:
- Opening inventory: €2,500
- Purchases this week: €3,200
- Closing inventory now: €2,100
Theoretical consumption: €2,500 + €3,200 - €2,100 = €3,600
Actual sales: €3,400
Inventory variance: €200 (€3,600 - €3,400)
Percentage: €200 / €3,200 purchases = 6.3%
This sits comfortably in the normal 2-8% range. But if you're consistently hitting 8% or higher, it's time to investigate.
Where does inventory get lost?
Inventory disappears through predictable channels - the kind of thing you only learn after closing your first month at a loss. Knowing these patterns helps you target your fixes.
- Spoilage from poor planning: Ordering too much for a slow week
- Theft: Staff or guests taking products
- Administrative errors: Deliveries not properly recorded
- Excessive portions: Chef gives overly generous portions
- Spilling and waste: Products fall, tear, or break
- Improper storage: Refrigeration too warm, products stored incorrectly
⚠️ Note:
Track your inventory variance weekly, not monthly. Monthly measurements catch problems too late and make root causes harder to pinpoint.
What do you do if your inventory variance is too high?
Inventory variance above 8-10% can cost you hundreds monthly. These steps bring those numbers back down:
- Check your refrigeration temperatures: Warm coolers accelerate spoilage
- Tighten your FIFO routine: First in, first out
- Strengthen delivery control: Count what arrives and verify quality
- Train your team on portion sizes: Ensure consistency across all staff
- Adjust your ordering frequency: Smaller, more frequent deliveries beat large inventory builds
💡 Example impact:
Restaurant with €4,000 purchases per week:
- At 12% inventory variance: €480 loss per week
- At 6% inventory variance: €240 loss per week
- Savings: €240 × 52 weeks = €12,480 per year
How do you prevent consistently high losses?
Keeping inventory variances low comes down to solid routines. That means weekly measurements, cause identification, and quick adjustments.
Many restaurants track inventory digitally with tools that make weekly checks easier and reveal trends over time. But the fundamentals remain unchanged: measure consistently and act fast on problems.
How do you calculate your inventory variance? (step by step)
Count your opening inventory
At the beginning of the week, count all products in your refrigerator, freezer, and dry storage. Convert to purchase prices, not selling prices. Note this amount as your opening inventory.
Record all purchases
Keep track of what you've purchased this week. Add up all supplier invoices. This is your total purchases for the week.
Count your closing inventory
Count all products again at the end of the week. This is your closing inventory. Calculate: (opening inventory + purchases - closing inventory) = theoretical consumption.
Compare with actual sales
Subtract your actual sales figures (in purchase prices) from the theoretical consumption. The difference is your inventory loss. Divide this by your purchases × 100 for the percentage.
✨ Pro tip
Track inventory variance by product group every 10 days instead of weekly - this catches spoilage patterns before they compound into major losses. Fresh produce and proteins need this tighter monitoring window.
Calculate this yourself?
In the KitchenNmbrs app you can do this in just a few clicks. 7 days free, no credit card.
Was this article helpful?
Frequently asked questions
Is 10% inventory variance too much?
Yes, 10% runs high for most operations. The sweet spot sits between 2-8%. At 10% loss you're consistently leaving money on the table that should flow to profit.
Do I need to count my inventory every week?
Weekly counts give you the control you need. Monthly counts catch problems too late and make identifying causes much harder.
How do I convert from selling price to purchase price?
Multiply your sales by your average food cost percentage. With a 30% food cost, €1,000 in sales equals €300 in purchases.
What if my inventory variance suddenly spikes?
Double-check your counting and verify all deliveries were recorded properly. Then examine spoilage, theft, or portion creep as likely culprits.
Does prep waste count toward inventory variance?
Everything you buy but don't sell counts as inventory loss. Trim waste, prep spills, and spoilage all factor into your variance calculations.
Should I track variance differently for seasonal ingredients?
Absolutely. Seasonal items often have shorter shelf lives and higher waste rates. Track them separately to avoid skewing your overall numbers during peak seasons.
📚 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.
Manage inventory without spreadsheets
Always know what you have in stock and what it's worth. KitchenNmbrs connects inventory to recipes and purchasing for complete oversight. Start your free trial.
Start free trial →