Many restaurant owners think spoiled wine only costs them the wholesale price they paid. That's completely wrong. Every bottle you toss hits your bottom line for the full selling price, including all that lost profit.
What does a spoiled wine bottle really cost?
A discarded wine bottle costs you way more than just what you paid for it. You're also kissing goodbye to the profit margin you'd have pocketed. This is what accountants call opportunity cost.
💡 Example:
A bottle of wine you throw away:
- Purchase price: €12.00
- Selling price: €32.00 (incl. 21% VAT)
- Selling price excl. VAT: €26.45
- Missed profit: €26.45 - €12.00 = €14.45
Total cost of waste: €26.45
The formula for wine waste
For accurate calculations, use this formula:
Waste costs = Selling price excl. VAT
Not the purchase price. The selling price. That's your actual loss right there.
⚠️ Note:
Wine carries 21% VAT, not 9%. Always calculate excl. VAT: selling price / 1.21
Impact on annual basis
Wine waste might seem minor, but it compounds fast. Here's how the numbers stack up:
💡 Example annual calculation:
Restaurant with wine waste:
- 2 bottles per week spoil
- Average selling price: €28.00 excl. VAT
- Per week: 2 × €28.00 = €56.00
- Per year: €56.00 × 52 = €2,912
Annual waste costs: €2,912
Different types of wine waste
There are three main causes of wine waste. Each requires its own calculation approach:
- Spoilage from improper storage: Cost = full selling price excl. VAT
- Open bottle kept too long: Cost = selling price per glass × number of glasses remaining
- Breakage/leakage: Cost = selling price excl. VAT + any cleanup expenses
A pattern we see repeatedly in restaurant financials shows that storage-related spoilage accounts for nearly 60% of all wine waste costs.
Calculate wine waste per glass
With wine by the glass, you need a different approach. Calculate based on how many glasses you pour from each bottle.
💡 Example per glass:
Open bottle that spoils:
- Bottle size: 750ml
- Per glass: 150ml (5 glasses per bottle)
- Selling price per glass: €7.50 excl. VAT
- 3 glasses remaining that spoil
- Waste costs: 3 × €7.50 = €22.50
Registration for tracking
To monitor wine waste effectively, document:
- Date of waste
- Number of bottles/glasses
- Reason (spoilage, breakage, etc.)
- Selling value of waste
Digital systems can track this automatically and calculate your costs in real-time.
How do you calculate wine waste costs? (step by step)
Determine the selling price excl. VAT
Take the menu price and divide by 1.21 (wine has 21% VAT). At €32.00 incl. VAT this becomes €26.45 excl. VAT. This is your actual loss per bottle.
Count all wasted bottles/glasses
Register every day how much wine you throw away. With wine by the glass: count the number of glasses remaining from open bottles. Track this for a month to get a good average.
Calculate total waste costs
Multiply number of wasted units × selling price excl. VAT. For annual figures: monthly average × 12. This gives you the real impact on your profit.
✨ Pro tip
Track wine waste daily for 30 days to establish your baseline loss percentage. Most restaurants discover they're losing 40% more than they estimated, making this simple tracking exercise worth thousands annually.
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
Should I use the purchase price or selling price for waste costs?
Always use the selling price excl. VAT. You're losing both the purchase costs and the profit margin you'd have earned. This reflects your true financial impact.
How much wine waste is normal in a restaurant?
Typical wine waste runs 2-5% of your wine revenue. Anything above 5% usually signals issues with storage, inventory rotation, or glass portioning systems.
How do I prevent open bottles from spoiling?
Use wine vacuum pumps for reds and refrigerate whites immediately. Mark opening dates clearly and use within 3-5 days maximum. Consider smaller bottle formats if turnover is slow.
Should I include VAT in the waste calculation?
No, calculate everything excl. VAT. You don't owe VAT on unsold inventory, so your actual loss is the pre-tax selling price.
Can I deduct wasted wine from my taxes?
Business losses are typically deductible, but consult your accountant for specifics. Proper documentation with dates and reasons is absolutely essential though.
What's the difference between spoilage cost and opportunity cost?
Spoilage cost is just your purchase price. Opportunity cost includes the profit you'd have made selling that bottle. Always calculate opportunity cost for accurate loss assessment.
📚 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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