Contribution margin per drink item reveals exactly how much profit each beverage generates for your restaurant. Unlike food cost percentages, this metric shows the actual euros flowing into your business from every glass sold. You'll master the step-by-step calculation process for every drink category on your menu.
What is contribution margin for drinks?
Contribution margin represents what remains from your selling price after subtracting direct costs. For beverages, these include the drink's purchase cost plus garnishes or mixers.
Here's why it beats food cost percentage: contribution margin reveals absolute euros retained per item sold. You get a clearer view of each drink's actual impact on your bottom line.
? Example:
House wine sold at €6.50 (incl. 21% VAT):
- Selling price excl. VAT: €5.37
- Purchase costs wine (150ml): €1.20
- Contribution margin: €5.37 - €1.20 = €4.17
Each glass generates €4.17 toward fixed costs and profit.
Calculate purchase costs per serving
Convert your purchase price to match actual serving portions. Portion sizes vary by drink type and house standards.
Standard portion sizes:
- Wine: 125ml or 150ml per glass
- Beer (tap): 250ml or 330ml
- Spirits: 35ml or 40ml
- Cocktails: variable, sum all ingredients
? Example whisky:
Jameson bottle (700ml) purchased at €28.00:
- Price per ml: €28.00 ÷ 700ml = €0.04 per ml
- 40ml serving: 40 × €0.04 = €1.60
- Selling price €8.50 (incl. 21% VAT) = €7.02 excl. VAT
Contribution margin: €7.02 - €1.60 = €5.42
Cocktails and mixed drinks
Sum all ingredients for cocktails: spirits, mixers, garnish, ice. Calculate based on actual quantities used per drink. This is the kind of thing you only learn after closing your first month at a loss - every ingredient matters.
? Example Mojito:
Ingredients per cocktail:
- Rum (50ml): €1.80
- Lime (half): €0.15
- Mint (sprig): €0.05
- Sugar water: €0.05
- Soda: €0.10
Total purchase costs: €2.15
Selling price €12.50 (incl. 21% VAT) = €10.33 excl. VAT
Contribution margin: €10.33 - €2.15 = €8.18
⚠️ Note:
Alcoholic drinks require 21% VAT calculations, not 9%. This covers beer, wine, spirits and cocktails. Non-alcoholic restaurant beverages fall under 9% VAT.
Compare contribution margins between drinks
After calculating margins per drink, compare which beverages generate maximum revenue. This guides menu composition and staff training decisions.
Rank your drinks:
- Highest contribution margin: promote actively
- Popular but low margin: consider price adjustments
- Low margin and low sales: potential removal candidates
- High margin but low sales: improve menu positioning
Use contribution margin for decisions
Contribution margin drives concrete decisions about drink menus and sales strategies.
Practical applications:
- Happy hour: feature high-margin drinks in promotions
- Staff training: teach recommendations for profitable drinks
- Menu layout: position profitable drinks prominently
- Purchasing: prioritize suppliers enabling optimal margins
? Example menu optimization:
Top 5 drinks by contribution margin:
- House cocktail: €8.50 contribution margin
- House white wine: €4.17 contribution margin
- Premium gin and tonic: €6.20 contribution margin
- Tap beer: €3.80 contribution margin
- Espresso martini: €7.90 contribution margin
Direct sales and marketing efforts toward these 5 items.
How do you calculate contribution margin per drink item?
Determine your selling price excluding VAT
Subtract 21% VAT from your menu price for alcoholic drinks. Formula: Price incl. VAT ÷ 1.21 = Price excl. VAT. For non-alcoholic use 9% VAT (÷ 1.09).
Calculate purchase costs per serving
Divide the purchase price of your bottle/keg by the number of servings you get from it. For cocktails add up all ingredients: spirits, mixers, garnish.
Subtract purchase costs from selling price
Contribution margin = Selling price excl. VAT - Purchase costs per serving. This amount is what each sold drink contributes to your fixed costs and profit.
✨ Pro tip
Analyze contribution margins on your 3 highest-volume drink categories weekly during your first 90 days. You'll spot pricing issues before they impact monthly profits.
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 include VAT in my contribution margin calculation?
How often should I update my contribution margins?
What is a good contribution margin for drinks?
Should I include staff and energy costs?
How do I handle drinks I sell by the bottle?
What about seasonal drinks with fluctuating ingredient costs?
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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