I'll admit it - I used to calculate margins the wrong way in my first dark kitchen. Running 50+ orders daily across multiple platforms while using traditional restaurant margin formulas? That's a recipe for financial disaster. Dark kitchens demand a completely different approach to margin calculations because platform fees, packaging costs, and rapid turnover create a unique cost structure.
Why dark kitchen margins are different
Dark kitchens operate with fundamentally different economics than traditional restaurants. You're not paying waitstaff wages, but you're hemorrhaging money on platform commissions, specialized packaging, and delivery logistics. This cost shift means your margin calculations can't follow the old playbook.
⚠️ Heads up:
Platform fees from Thuisbezorgd, Uber Eats, or Deliveroo are between 15-30% of your order value. You need to factor this into your margin calculation, otherwise nothing adds up.
The adjusted margin formula for dark kitchens
Forget the standard margin formula - it doesn't work here. Dark kitchens need a formula that captures every delivery-specific cost that'll eat into your profits.
Dark kitchen margin formula:
Margin % = ((Sales price - Ingredient costs - Packaging costs - Platform fee) / Sales price) × 100
💡 Example:
You sell a burger for €15.00 via Thuisbezorgd:
- Sales price: €15.00
- Ingredient costs: €4.50
- Packaging (box, bag, napkin): €0.80
- Platform fee (25%): €3.75
Margin: ((€15.00 - €4.50 - €0.80 - €3.75) / €15.00) × 100 = 39.7%
Calculate platform fees per order
Each platform's got its own fee structure, and they're not shy about changing them. Thuisbezorgd takes a percentage slice, while Uber Eats might tack on fixed fees too. Don't guess - dig into your actual invoices.
- Thuisbezorgd: Usually 15-30% of order value
- Uber Eats: 15-30% plus sometimes fixed costs
- Deliveroo: Similar, around 20-30%
Pull your invoices from the past month and calculate the real average. That's your baseline, not some industry estimate.
Don't forget packaging costs
Packaging costs add up fast and they're non-negotiable. Every box, bag, napkin, and piece of cutlery chips away at your margin. After managing kitchen operations for nearly a decade, I've seen operators underestimate packaging costs by 40% or more.
💡 Example packaging costs:
- Cardboard box: €0.35
- Plastic bag: €0.15
- Napkins (2x): €0.10
- Cutlery set: €0.20
Total per order: €0.80
Turnover speed and inventory costs
Fast turnover's a double-edged sword. Sure, your cash flow's healthier, but you're ordering smaller quantities more frequently. That usually means higher per-unit costs and more delivery fees.
Track your inventory days religiously. With 50 daily orders and 3 days of stock, you're turning inventory every 72 hours. That's lightning-fast compared to traditional restaurants, but it comes with its own cost implications.
Calculate your break-even point
Dark kitchen break-even calculations flip the script. Lower fixed costs, higher variable costs per order. It's a completely different math problem.
💡 Break-even example:
Fixed costs per month: €8,000 (rent, utilities, staff)
Average margin per order after all costs: €6.00
Break-even: €8,000 / €6.00 = 1,334 orders per month
That's approximately 44 orders per day.
Daily checks in a dark kitchen
High turnover means you can't afford to check numbers weekly. By then, you're already behind. Daily monitoring isn't optional - it's survival.
- Number of orders: How many orders did you run?
- Average order value: Is this going up or down?
- Platform distribution: Which platform delivers the most orders?
- Waste: What got thrown away? With fast turnover this should be minimal
How do you calculate your dark kitchen margin?
Gather all costs per order
Add up: ingredient costs, packaging costs, and platform fee. Check your invoices from last month to determine the average platform percentage. Don't forget small costs like napkins or stickers.
Calculate your net revenue per order
Subtract all costs from your sales price. This is what's left over for fixed costs and profit. Use the formula: Sales price - Ingredients - Packaging - Platform fee.
Check your margin percentage
Divide your net revenue by your sales price and multiply by 100. A healthy margin for dark kitchens is between 35-45%. Lower than that means you're not earning enough per order.
✨ Pro tip
Track your margin per platform every 48 hours during peak periods. Uber Eats might be profitable at €6.20 per order while Deliveroo only nets €4.80 due to different fee structures.
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 is a healthy margin for a dark kitchen?
A healthy margin sits between 35-45% after deducting all costs (ingredients, packaging, platform fees). This runs higher than traditional restaurants since you're not paying waitstaff, but platform and packaging costs eat into that advantage.
Should I include VAT in my margin calculation?
No, always calculate excluding VAT. Your €15.00 sales price includes 9% VAT, so excluding VAT that's €13.76. Platform fees are calculated on the excl. VAT amount too.
How often should I check my margins?
With high turnover, check margins at least weekly. Platform fees and ingredient prices shift regularly, and with rapid turnover you'll spot problems too late if you're not monitoring consistently.
What if my platform fee jumps from 20% to 30%?
You need to raise prices or cut costs immediately. A 10 percentage point increase means €1.50 less margin on a €15.00 order - that can flip you from profitable to losing money overnight.
Are packaging costs of €0.80 per order realistic?
Yes, that's standard. Quality packaging for hot dishes runs €0.60-€1.20 per order. Cheap packaging leads to complaints and refunds, which costs way more than investing in proper materials upfront.
How do I handle different commission rates across multiple platforms?
Calculate margins separately for each platform since commission structures vary wildly. Some platforms might be unprofitable even if your overall numbers look good. Track platform-specific profitability weekly to make informed decisions about where to focus your marketing spend.
📚 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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