Customers who bring their own ingredients create a tricky pricing puzzle for restaurant operators. You're still providing service, facilities, and often additional ingredients, but your main costs disappear. How do you price fairly while protecting your margins?
What do you include and exclude?
With customer-supplied ingredients, you only calculate costs you actually incur. Focus on these areas:
- Facility costs: gas, electricity, water for preparation
- Additional ingredients: spices, oil, butter, salt
- Labor time: preparation, cooking, cleanup
- Material costs: packaging, dishes (if provided)
💡 Example BBQ service:
Customer brings meat, you handle marinades and preparation:
- Marinades and spices: €2.50
- Gas for BBQ: €1.80
- Labor time (1 hour at €18): €18.00
- Packaging: €0.70
Total cost price: €23.00
Calculate your facility costs
Facility costs can't be measured precisely. Work with realistic averages instead:
- Gas/electricity per hour of cooking: €3-5 for standard kitchen
- Water: €0.50-1.00 per preparation
- Dishwashing and cleaning: €2-4 per preparation
⚠️ Note:
Always include labor time, even if you're cooking yourself. Your time has value and must be factored into pricing.
Different calculation models
You've got three main approaches to consider:
Model 1: Cost price + margin
Calculate all costs and add your desired margin.
💡 Example cost price + margin:
- Total costs: €25.00
- Desired margin: 40%
- Selling price: €25.00 / 0.60 = €41.67
Model 2: Hourly rate + materials
Charge a fixed hourly rate plus material costs.
Model 3: Percentage of normal menu price
From years of working in professional kitchens, I've found charging 60-80% of your regular menu price works well for most situations.
Hygiene and responsibility
Customer-supplied ingredients bring extra risks you can't ignore:
- Always inspect the quality of brought ingredients
- Refuse ingredients that are too old or spoiled
- Establish clear agreements about shelf life and temperature
- Define who's responsible in case of food poisoning
⚠️ Note:
Always document agreements about quality and responsibility in writing. When in doubt about quality: refuse the ingredients.
Practical tips for pricing
Consider these factors in your calculations:
- Minimum rate: Even small jobs need to cover your fixed costs
- Preparation: Include time for planning and coordination
- Flexibility: Customer ingredients often mean more back-and-forth
- Risk surcharge: Extra margin for handling unfamiliar ingredients
💡 Example catering price:
Normal price per person: €35.00
With customer's main ingredient: €35.00 × 0.70 = €24.50
You save the customer €10.50 per person while maintaining healthy margins over your actual costs.
How do you calculate cost price with customer ingredients? (step by step)
Inventory your own costs
Make a list of everything you provide: spices, oil, gas/electricity, labor time, packaging and facilities. Only add up what actually costs you money.
Calculate labor time realistically
Don't just count cooking time, but also preparation, customer coordination and cleanup. Multiply by your hourly rate (minimum €15-20 per hour).
Add margin for risk and profit
Customer ingredients bring extra risks. Calculate at least 30-40% margin over your cost price to cover risk and profit.
✨ Pro tip
Create a 48-hour ingredient inspection protocol: check temperature upon arrival, verify expiration dates, and photograph any quality concerns. This documentation protects you if disputes arise later.
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 if the brought ingredients turn out to be bad?
Always refuse ingredients that aren't fresh enough. Establish clear quality standards beforehand and make it known you have the right to refuse subpar ingredients.
Do I charge VAT on my service?
Yes, you charge 9% VAT on your complete selling price, even with customer-supplied ingredients. You're providing a taxable service regardless of ingredient sourcing.
How do I calculate gas and electricity costs per preparation?
Budget around €3-5 per hour of active cooking for gas and electricity combined. For a typical 2-hour preparation, that's €6-10 in energy costs.
Can I just charge a percentage of my normal price?
You can, but verify you're still covering all costs. Most operators charge 60-80% of their standard menu price, depending on how many ingredients the customer supplies.
Who is liable in case of food poisoning?
Liability depends on the root cause. Document quality responsibilities in writing beforehand and consult your insurance provider about coverage scenarios.
How do I handle customers who bring frozen ingredients?
Frozen ingredients require extra thawing time and careful temperature monitoring. Add 2-3 hours to your labor calculation and ensure proper thawing facilities.
Should I charge extra for unfamiliar ingredients I've never cooked?
Absolutely. Unknown ingredients carry higher risk and may require research or test cooking. Add a 15-20% surcharge to cover the additional complexity and time.
⚠️ EU Regulation 1169/2011 — Allergen Information — https://eur-lex.europa.eu/eli/reg/2011/1169/oj
The allergen information on this page is based on EU Regulation 1169/2011. Recipes and ingredients may vary by supplier. Always verify current allergen information with your supplier and communicate this correctly to your guests. KitchenNmbrs is not liable for allergic reactions.
In the UK, the FSA enforces allergen regulations under the Food Information Regulations 2014.
📚 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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