Free water, oat milk, and extra shots seem small, but can seriously impact your margins. Many cafés forget to include these 'small costs' in their calculations, which means they're unknowingly losing money. The result? Margins that slowly erode without you realizing why.
Why free extras eat into your profit
It feels generous to offer free water or skip charging for oat milk. But every free extra costs money. And if you don't pass that cost on, you're paying for it from your own margin.
⚠️ Watch out:
With 100 cappuccinos per day with free oat milk (€0.15 per serving) you lose €15 per day = €5,475 per year in margin.
Calculate the real costs per item
For every free extra, you need to know what it actually costs:
- Tap water: €0.002 per glass (water costs + glass + washing)
- Bottled water: €0.25-0.40 per bottle
- Milk alternatives: €0.10-0.20 per serving (depending on type)
- Extra espresso shot: €0.08-0.12 per shot
- Sugar/sweeteners: €0.01-0.02 per packet
💡 Example calculation oat milk:
Oat milk carton 1 liter: €2.50
- Serving per cappuccino: 30ml
- Number of servings per carton: 33
- Cost per serving: €2.50 ÷ 33 = €0.076
Rounded: €0.08 per cappuccino with oat milk
Three ways to solve this
You have three options for handling free extras:
Option 1: Charge the customer
Add a surcharge for milk alternatives and extra shots. Standard surcharges:
- Milk alternatives: €0.50 surcharge
- Extra shot: €0.60 surcharge
- Bottled water: €2.50-3.50
Option 2: Include in your base prices
Calculate what percentage of your customers take these extras. Add the average costs to your standard drink price.
💡 Example mixed calculation:
Of your 100 cappuccinos per day:
- 20% choose oat milk (€0.08 extra cost)
- 10% choose extra shot (€0.10 extra cost)
Average extra costs: (20% × €0.08) + (10% × €0.10) = €0.026 per cappuccino
Add €0.03 to your cappuccino price to cover this
Option 3: Accept as marketing costs
Accept the costs as part of your guest experience, but track exactly how much it costs you. Make sure your other margins compensate for it.
Track and monitor your free extras
Keep tabs on how many free extras you give away. Otherwise you won't know if it's spiraling out of control:
- Count daily: how many glasses of water, milk alternatives, extra shots
- Calculate monthly costs
- Compare with previous month: is it increasing?
⚠️ Watch out:
Staff tend to be generous with 'free' items. One shot of oat milk quickly becomes two.
Impact on your total margin
Free extras seem insignificant, but can reduce your total drink margin by 2-5%. For an average café with €300,000 annual drink revenue, this means €6,000-15,000 less profit per year. From analyzing actual purchasing data across different restaurant types, this pattern shows up consistently - small freebies add up to major margin erosion.
💡 Example impact on annual basis:
Café with 150 coffees per day, 300 days per year:
- 25% choose milk alternative (free): €0.08 × 37 × 300 = €888/year
- 30 glasses of water per day (free): €0.002 × 30 × 300 = €18/year
- 15% choose extra shot (free): €0.10 × 22 × 300 = €660/year
Total loss: €1,566 per year on 'small' free extras
Organize in practice
Use a food cost calculator like KitchenNmbrs to track your drink costs, including all additions. This way you immediately see what each variant of your drinks really costs and can make informed decisions about what is and isn't free.
How do you calculate the costs of free extras?
Inventory all free extras
Make a list of everything you give away for free: water, milk alternatives, extra shots, sugar, etc. Also note how much you give away on average per day.
Calculate the cost per serving
Divide the purchase price by the number of servings you get from a package. For oat milk at €2.50 per liter you get 33 servings of 30ml = €0.076 per serving.
Calculate the monthly impact
Multiply the cost per serving by the number you give away per day, times 30 days. This gives you the real monthly costs of your free extras.
✨ Pro tip
Track your free water, milk alternatives, and extra shots for exactly 14 days, then multiply by 26 to see your annual cost impact. Most café owners discover they're giving away €2,000-4,000 worth of 'free' additions yearly.
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 really have to charge for oat milk?
That's your choice. But know that it costs you €0.08 per cappuccino. With 50 cappuccinos per day with oat milk, that's €1,460 per year in costs you're not passing on.
How much surcharge can I charge for milk alternatives?
Standard is €0.50 surcharge. That covers your costs (€0.08-0.15) well and gives you some margin. Some specialty coffee shops charge €0.60-0.80.
What does tap water really cost per glass?
About €0.002 per glass in water costs, plus costs for the glass, washing, and staff. In total you're looking at about €0.05-0.08 per glass of tap water.
How do I keep track of how many free extras I give away?
Count at the end of the day: how many milk alternative cartons have been opened, how many extra shots have been pulled. Or have staff keep a tally list at the register.
📚 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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