Running loyalty discounts without proper calculation is like pouring money down the drain alongside your cocktail ingredients. What appears to be a modest 5% discount can slash your actual profit by 20% or more. Here's exactly how to calculate what those discounts truly cost you.
What's the real impact of discounts?
A 10% discount doesn't translate to a 10% profit drop. The actual impact hits much harder because you're discounting your entire selling price while ingredient costs stay the same.
💡 Example:
A cocktail that normally costs €12.00 (incl. 21% VAT):
- Selling price excl. VAT: €9.92
- Ingredient costs: €2.00
- Normal margin: €7.92 (80%)
With 10% loyalty discount:
- New price: €10.80 incl. VAT
- Excl. VAT: €8.93
- New margin: €6.93 (87% of original)
You lose 13% margin on a 10% discount!
Calculate the real impact step by step
Every discount you offer requires calculating its true cost in margin erosion. Most kitchen managers discover too late that their "generous" 15% discount actually destroys nearly 20% of their profit per drink.
Discount impact formula:
Margin loss % = (Discount % / (100% - Pour cost %)) × 100
💡 Example calculation:
You give 15% discount on drinks with 20% pour cost:
- Normal margin: 80%
- Impact: 15% / 80% = 18.75%
- You lose 18.75% of your margin
15% discount = 18.75% less profit per drink
Calculate different discount models
Loyalty programs come in various structures. Each model impacts your profitability differently.
Percentage discount (most common):
- Fixed discount on all drinks
- Example: 10% discount for members
- Easiest to calculate, but creates biggest margin impact
Free drink after X purchases:
- Example: 10th drink free
- Actual discount: 1/10 = 10%
- Psychological effect often exceeds actual discount value
⚠️ Note:
Always calculate using prices excl. VAT. Drinks carry 21% VAT, so a €12.00 cocktail equals €9.92 excl. VAT.
Calculate compensation strategies
You can offset discounts by driving additional volume or adjusting your base pricing structure.
Calculate volume compensation:
Extra volume needed = Discount % / (100% - Discount %)
💡 Example volume compensation:
With 10% discount you need:
- 10% / 90% = 11.1% more volume
- From 100 to 111 drinks per week
- Otherwise you'll earn less
Price increase to compensate:
Raise your base price before introducing the discount. This approach maintains your net revenue levels.
Measure ROI of loyalty programs
Track if your loyalty program actually generates more revenue than it costs you.
Key metrics to monitor:
- Average visit frequency of loyal customers vs. regular patrons
- Average transaction value with and without discount applied
- Percentage of new customers acquired through program
- Customer retention rates (how much longer members remain active)
💡 Example ROI calculation:
Loyal customer visits 2× per week vs. 1× normally:
- Extra revenue: €24 per week (2 cocktails at €12)
- Discount cost: 10% = €2.40 per week
- Net gain: €21.60 per week
- Annual value: €1,123 extra per loyal customer
Practical tips for implementation
Structure your loyalty program strategically to minimize margin damage while maximizing customer engagement.
Smart discount structures:
- Limit discounts to slower days (Monday-Tuesday)
- Apply discount to second drink (boosts transaction values)
- Focus discounts on specific high-margin products
- Use points systems instead of direct price reductions
⚠️ Note:
Always pilot a small loyalty program first. Track the financial impact for 3 months before rolling out to your entire customer base.
How do you calculate the impact of discounts? (step by step)
Calculate your current pour cost per drink
Add up all ingredient costs (alcohol, mixers, garnish). Divide by selling price excl. VAT and multiply by 100 for percentage.
Calculate the margin loss percentage
Use the formula: Discount % divided by (100% minus Pour cost %). This gives you the real impact on profit.
Calculate how much extra volume you need
Formula: Discount % divided by (100% minus Discount %). This is the extra volume to earn the same amount.
Measure the real impact after 1 month
Compare revenue, number of customers and average transaction value with the month before. Check if the extra volume is really there.
✨ Pro tip
Track exactly 25 loyalty members for 6 weeks to find your program's break-even point. You'll quickly identify which customers genuinely increase their spending versus those who just time their visits around discount days.
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
How much discount can I give without making a loss?
This depends entirely on your pour cost percentage. With a 20% pour cost, you can offer maximum 10-12% discount if you can drive 15% more volume. Anything higher becomes financially risky.
Is it better to give a discount or lower prices permanently?
Temporary discounts through loyalty programs create stronger psychological impact than permanent price reductions. Customers value the perceived 'deal' more than structurally lower pricing.
Do I need to include VAT in my discount calculations?
No, always calculate excluding VAT for accurate margin analysis. Your discount applies to the customer's VAT-inclusive price, but margin calculations should be based on VAT-exclusive figures.
How do I measure if my loyalty program actually works?
Compare these monthly metrics: total drink revenue, unique customer count, average transaction value, and visit frequency. If these metrics trend upward, your program is delivering results.
Which discount structure has the least impact on my margins?
Points systems or 'buy 9 get 1 free' structures typically damage margins less than straight percentage discounts. Discounting the second drink also encourages higher transaction values.
Should I offer different discounts for wine versus cocktails?
Absolutely yes. Wine typically has lower margins than cocktails, so apply smaller discounts to wine. A 15% discount on a €30 wine bottle with 60% margin hurts more than 15% off a premium cocktail with 80% margin.
📚 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.
Calculate your cocktail costs down to the ml
Drink margins seem high, but spillage and free pours eat them up. KitchenNmbrs calculates the exact cost price of every cocktail and drink. Try it free.
Start free trial →