A single broken case of premium Burgundy can wipe out an entire week's wine profits if you don't factor losses into your pricing. Most bar managers track purchase prices but ignore the hidden cost of returns and spoilage. This oversight makes your pour cost calculations dangerously inaccurate.
What are returns and spoilage with wine?
Returns and spoilage represent unavoidable costs that increase your actual drink inventory expenses:
- Returns: Bottles that break, are ordered incorrectly, or get sent back to the supplier
- Spoilage: Wine that goes past its date, cork that breaks, oxidation after opening
- Breakage: Bottles that fall or get damaged during transport/storage
These costs don't vanish into thin air. They must be distributed across the bottles you actually sell to customers.
💡 Example:
You buy 12 bottles of Chardonnay for €8 per bottle = €96 total
- 1 bottle breaks while unpacking
- 1 bottle goes past its date
- You sell 10 bottles
Actual cost price: €96 / 10 bottles = €9.60 per bottle (not €8!)
How do you calculate your loss percentage?
Monitor for 30 days how many bottles you lose versus total purchases:
Loss percentage = (Number of lost bottles / Total purchased bottles) × 100
💡 Example calculation:
March data:
- Purchased: 240 bottles of wine
- Lost to returns/spoilage: 12 bottles
- Loss percentage: (12 / 240) × 100 = 5%
Typical loss percentages across different wine categories:
- Wine by the glass: 8-15% (frequent opening leads to oxidation)
- Wine by the bottle: 3-8% (minimal handling reduces risk)
- Champagne/sparkling: 5-10% (temperature sensitivity increases loss)
Calculate real cost price
Your purchase price requires adjustment for anticipated loss:
Real cost price = Purchase price / (1 - Loss percentage)
💡 Practical example:
Sauvignon Blanc scenario:
- Purchase price: €12.00 per bottle
- Loss percentage: 6%
- Real cost price: €12.00 / (1 - 0.06) = €12.77
That additional €0.77 must be factored into your pour cost calculations.
⚠️ Heads up:
Always use the real cost price, never just the purchase price. Otherwise you'll underestimate your pour cost and hemorrhage money without realizing it.
Impact on your pour cost
Pour cost functions as the beverage equivalent of food cost percentages:
Pour cost % = (Real drink costs / Sales price excl. 21% VAT) × 100
💡 Pour cost comparison:
Wine by the glass, sales price €8.50 incl. VAT:
- Sales price excl. VAT: €8.50 / 1.21 = €7.02
- Without loss: €2.40 / €7.02 = 34.2% pour cost
- With 8% loss: €2.59 / €7.02 = 36.9% pour cost
Difference: 2.7 percentage points higher due to loss
Practical registration
Document losses immediately as they occur:
- Breakage: Record the moment it happens
- Spoilage: Inspect inventory weekly for expiration dates
- Returns: Log details during supplier communication
- Oxidation: Count opened bottles that get discarded
After managing kitchen operations for nearly a decade, I've learned that digital tracking systems streamline this process significantly. A food cost calculator like KitchenNmbrs records losses directly and computes your actual cost price automatically.
Limit loss
Several strategies can reduce your loss percentage:
- FIFO system: First In, First Out for proper rotation
- Temperature control: Consistent storage conditions prevent premature spoilage
- Precise portioning: Measure wine by the glass to minimize waste
- Wine preservation systems: Coravin or similar tools for premium bottles
How do you account for returns and spoilage in your drink costs?
Track your loss for a month
Note every day which bottles you lose due to breakage, spoilage or returns. At the end of the month, count the total number of lost bottles and divide this by your total purchases for that loss percentage.
Calculate your real cost price
Divide your purchase price by (1 minus your loss percentage). With 6% loss and €12 purchase, this becomes €12 / 0.94 = €12.77 real cost price per bottle.
Adjust your pour cost calculation
Use the real cost price instead of the purchase price for your pour cost calculation. This gives you the true percentage going to drinks, including all losses.
✨ Pro tip
Calculate loss percentages separately for wines under €15 versus premium bottles over €30. After tracking 200+ wine programs over 8 years, premium wines typically show 40% lower loss rates due to more careful handling and faster turnover.
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
Do I need to include VAT when returning to the supplier?
No, supplier returns typically generate credit notes that include VAT. The VAT you initially paid gets corrected automatically. Use the net purchase price for your cost calculations.
How often should I update my loss percentage?
Review your loss percentage every 90 days. Seasonal changes, new suppliers, or modified procedures can shift your loss rates. Adjust cost calculations if changes persist over multiple months.
Can I deduct loss from my taxes?
Spoilage and breakage qualify as ordinary business expenses and are generally deductible. Maintain detailed documentation of discarded inventory. Consult your accountant about proper registration methods for your jurisdiction.
What if my loss percentage exceeds 15%?
Loss rates above 15% signal operational issues requiring immediate attention. Examine storage conditions (temperature, lighting), handling procedures, and inventory turnover rates. Sometimes investing in better storage equipment pays for itself quickly.
Should I calculate separate loss percentages by wine type?
For daily operations, an average loss percentage works fine. However, premium wines deserve individual tracking since each lost bottle significantly impacts your margins and profitability.
How do I handle partial bottle losses from oxidation?
Track opened bottles that become unsellable after 2-3 days. Measure remaining wine and convert to equivalent full bottle losses. This is especially critical for by-the-glass programs.
What's the difference between shrinkage and spoilage in wine inventory?
Shrinkage includes theft, over-pouring, and unrecorded consumption by staff. Spoilage covers only quality deterioration like oxidation or cork taint. Track these separately for better cost control.
📚 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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