Picture this: you're serving hundreds of fries portions daily, but have no clue if each one actually makes money. Most snack bar owners estimate their fries margin without knowing the real cost per portion. Here's how to calculate your exact margin step-by-step.
What is margin and why is it important?
Margin represents the gap between ingredient costs and selling price. Fries might seem straightforward, but you're dealing with more expenses than just potatoes and oil.
💡 Example:
Portion of fries for €3.50 (incl. 9% VAT):
- Selling price excl. VAT: €3.21
- Ingredient costs: €0.85
- Margin: €3.21 - €0.85 = €2.36
Margin percentage: 73.5%
Collect all costs for one portion of fries
Accurate margin calculations require every ingredient that goes into one portion:
- Potatoes: Typically 200-250 grams per portion
- Frying oil: Absorption during cooking (roughly 10-15% of weight)
- Salt: Minimal amount, but it counts
- Packaging: Container or paper bag
💡 Example calculation per portion:
- Potatoes (225g): €0.45
- Frying oil (30g absorption): €0.24
- Salt: €0.01
- Packaging: €0.15
Total cost price: €0.85
Calculate your selling price excluding VAT
Proper margin calculations always use prices excluding VAT. Fries fall under the reduced VAT rate of 9%.
Formula: Selling price excl. VAT = Menu price / 1.09
⚠️ Note:
Always work with prices excluding VAT. Otherwise your margin looks inflated compared to reality.
Calculate your margin in euros and percentage
You can now determine your real margin using two methods:
- Margin in euros: Selling price excl. VAT - Cost price
- Margin percentage: (Margin in euros / Selling price excl. VAT) × 100
💡 Complete example:
Large fries for €4.50 (incl. VAT):
- Selling price excl. VAT: €4.13
- Cost price: €1.10
- Margin: €4.13 - €1.10 = €3.03
- Margin percentage: (€3.03 / €4.13) × 100 = 73.4%
What is a good margin on fries?
Fries typically deliver high margins since ingredients cost little. Standard margins across snack bars:
- Fries: 70-80% margin
- Drinks: 75-85% margin
- Snacks (sausage, croquette): 60-70% margin
From years of working in professional kitchens, I've seen that fries margins below 65% usually signal expensive suppliers or oversized portions.
Keep track of your margin
Monitor your margins regularly since they shift constantly. Potato and oil prices fluctuate with seasons and global markets.
Food cost calculators like KitchenNmbrs track your ingredient costs automatically and show exactly what each fries portion generates without manual calculations.
How do you calculate the margin on fries? (step by step)
Add up all ingredient costs
Calculate what one portion costs: potatoes, frying oil (absorption), salt and packaging. Don't forget any ingredient that goes into the portion.
Calculate selling price excluding VAT
Divide your menu price by 1.09 to get the price excluding 9% VAT. This is the price you should use for a correct margin calculation.
Subtract cost price from selling price
Selling price excl. VAT minus cost price = margin in euros. Divide this by the selling price and multiply by 100 for the percentage.
✨ Pro tip
Weigh your actual fries portions for 2 weeks straight - you'll discover portion creep costs you 5-12% margin without realizing it. Most operators serve 15-30g more than intended.
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 frying oil does fries absorb during cooking?
Fries absorb approximately 10-15% of their weight in frying oil. With 225 grams of fries, that's about 25-35 grams of oil.
What if my margin on fries is lower than 65%?
You're likely overpaying for ingredients, serving oversized portions, or pricing too low. Start by auditing your supplier costs and portion weights.
Should I include energy and staff in the cost price?
No, focus on direct ingredient costs only. Energy and labor are indirect expenses that belong in your overall operational budget, not individual product costing.
📚 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.
Selling food? Then you need KitchenNmbrs
Whether you run a restaurant, food truck, catering company, or meal kit business — you need to know what each dish costs. KitchenNmbrs gives you that insight. Start your free trial.
Start free trial →