Wine pouring loss can quietly drain your profits by 2-4 percentage points per glass. That bottle poured a bit too generously, the glass that toppled over, or wine that spoiled after sitting open too long - these losses compound quickly. Most restaurant owners calculate costs based only on bottle price, missing this critical factor entirely.
What is wine pouring loss?
Pouring loss represents the gap between what you purchase and what actually reaches paying customers. With wine, this happens because of:
- Pouring too generously (160ml instead of 150ml)
- Tasting for guests
- Spilling while pouring
- Bottles that spoil after opening
- Glasses that fall over or are sent back
Typical pouring loss for wine ranges from 5% to 12%. Ignore this in your cost calculations, and you're hemorrhaging money with every pour.
⚠️ Note:
Many operators calculate costs using only the bottle's purchase price. Pouring loss can slash your profit margin by 2-4 percentage points.
Calculate your actual cost per glass
The formula for cost per glass including pouring loss:
Cost per glass = (Bottle purchase price / Number of glasses per bottle) / (1 - Pouring loss%)
💡 Example:
Wine bottle €18.00 purchase price, 5 glasses per bottle, 8% pouring loss:
- Base cost: €18.00 / 5 = €3.60 per glass
- With pouring loss: €3.60 / (1 - 0.08) = €3.91 per glass
Difference: €0.31 per glass extra
Determine your pouring loss percentage
Track your pouring loss over 2-4 weeks:
- Count bottles: How many bottles did you open?
- Count glasses: How many glasses did you sell?
- Calculate difference: (Opened bottles × 5) - Sold glasses
💡 Example measurement:
Over 3 weeks:
- Opened bottles: 84 units
- Possible glasses: 84 × 5 = 420 glasses
- Sold glasses: 385 units
- Loss: 420 - 385 = 35 glasses
Pouring loss: 35/420 = 8.3%
Impact on your profit margin
Pouring loss directly hammers your pour cost (wine's equivalent to food cost). Based on real restaurant P&L data, establishments that ignore pouring loss consistently underperform profit targets by 3-7%:
💡 Impact calculation:
Wine sold for €8.50 (incl. 21% VAT) = €7.02 excl. VAT
- Without pouring loss: €3.60 / €7.02 = 51% pour cost
- With 8% pouring loss: €3.91 / €7.02 = 56% pour cost
You lose 5 percentage points margin due to pouring loss
Different wines, different loss
Not all wines bleed the same way:
- House wine by the glass: 5-8% (high turnover, staff familiarity)
- Premium wines: 10-15% (more tasting, slower movement)
- Wines by the bottle: 2-5% (customer consumes entire bottle)
- Sparkling wines: 8-12% (carbonation loss, spillage)
⚠️ Note:
Premium wines often suffer higher pouring loss due to tastings and slower turnover. Budget 12-15% for these selections.
Reduce pouring loss
Practical steps to limit waste:
- Standard pour size: Train staff on exact quantities
- Proper glasses: Pour line at 150ml ensures consistency
- FIFO system: First in, first out for opened bottles
- Storage conditions: Vacuum pump or argon gas for opened bottles
- Daily checks: Count opened bottles vs sold glasses
Tools like KitchenNmbrs can track pouring loss by wine type and automatically apply it to your cost calculations.
How do you calculate pouring loss in your wine cost price?
Measure your actual pouring loss
Track for 2-3 weeks how many bottles you open and how many glasses you sell. Calculate the difference: (opened bottles × 5) - sold glasses = loss in glasses.
Calculate your pouring loss percentage
Divide the loss by the total possible number of glasses: (loss in glasses / (opened bottles × 5)) × 100 = pouring loss percentage.
Adjust your cost price
Use the formula: (bottle purchase price / number of glasses per bottle) / (1 - pouring loss%) = actual cost per glass including loss.
✨ Pro tip
Track pouring loss separately for each wine category over 30-day periods. Premium wines consistently show 3-5% higher loss than house selections due to increased customer tastings and staff unfamiliarity.
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 is a normal pouring loss percentage for wine?
Standard pouring loss runs between 5% and 12%. House wine by the glass typically hits 5-8%, while premium wines reach 10-15% due to more tastings and slower turnover.
Should I include VAT in my wine cost price calculation?
No, always calculate excluding VAT. Alcoholic beverages carry 21% VAT in the Netherlands. A glass at €8.50 including VAT equals €7.02 excluding VAT for your pour cost calculation.
How often should I update my pouring loss percentage?
Review your pouring loss every 2-3 months. New staff, different wines, or seasonal changes can shift the percentage significantly.
What if my pouring loss exceeds 15%?
Above 15% signals serious problems. Check your pouring training, glass sizes, and storage conditions for opened bottles. You might also have inventory shrinkage issues.
Should I calculate pouring loss differently for wines by the bottle?
Yes, wines by the bottle have much lower loss (2-5%) since customers consume the entire bottle. Loss comes mainly from tastings and occasional spilled glasses.
How do I handle pouring loss for wine flights or tastings?
Wine flights typically see 15-20% loss due to multiple small pours and increased spillage risk. Factor this higher percentage into your tasting menu pricing.
Can seasonal staff changes affect my pouring loss calculations?
Absolutely. New or temporary staff often pour less consistently, increasing loss by 2-4 percentage points. Recalculate your loss percentages after major staffing changes.
📚 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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