Traditional suppliers let you order specific products at fixed prices. Vegetable subscriptions work differently—you pay upfront for a mystery mix of seasonal produce. This creates a margin calculation challenge since you can't predict exact quantities or varieties.
Why subscription vegetables are different
With a traditional supplier, you order specific products at a fixed price per kilo. With a vegetable subscription, you pay a fixed amount and receive a mix of seasonal vegetables. The problem: you don't know exactly what you'll get and in what quantities.
💡 Example:
You pay €85 for a weekly vegetable package. This week you receive:
- 2 kg potatoes
- 1.5 kg carrots
- 800g zucchini
- 600g bell peppers
- 400g mushrooms
Total weight: 5.3 kg for €85 = €16.04/kg average
Calculate your actual costs per ingredient
To calculate your margin correctly, you need to know what each ingredient actually costs you within the subscription. You do this by dividing the total package amount across ingredients based on their market value.
⚠️ Note:
Don't simply divide by total weight. Mushrooms are more expensive than potatoes, so they should be allocated a larger share of the €85.
Step-by-step cost allocation
The most effective method is cost allocation based on market value. Look up what each ingredient would cost from a regular supplier, and use those ratios to divide your subscription costs. This is the kind of thing you only learn after closing your first month at a loss—weight-based calculations will destroy your margins on premium vegetables.
💡 Example calculation:
Market prices and cost allocation:
- 2 kg potatoes × €2.50/kg = €5.00 (11.8% of total)
- 1.5 kg carrots × €3.00/kg = €4.50 (10.6%)
- 800g zucchini × €4.00/kg = €3.20 (7.5%)
- 600g bell peppers × €8.00/kg = €4.80 (11.3%)
- 400g mushrooms × €12.00/kg = €4.80 (11.3%)
Total market value: €42.30
Your actual costs: €85 × (percentage per ingredient)
Calculate your food cost per dish
With your actual ingredient costs, you can now calculate the food cost of your dishes. Use the same formula as always: Food cost % = (Ingredient costs / Selling price excl. VAT) × 100
The difference is that your ingredient costs are now based on your actual subscription costs, not market prices.
💡 Example dish:
Roasted vegetable platter (€18.50 incl. 9% VAT):
- 200g zucchini: €2.00 (from subscription)
- 150g bell peppers: €1.88 (from subscription)
- 100g mushrooms: €2.38 (from subscription)
- Olive oil, herbs: €0.75
Total ingredient costs: €7.01
Selling price excl. VAT: €18.50 / 1.09 = €16.97
Food cost: (€7.01 / €16.97) × 100 = 41.3%
Advantages and disadvantages of vegetable subscriptions
Advantages:
- Often lower costs than individual purchases
- Seasonal vegetables are usually fresh and high quality
- Less time spent on ordering and supplier management
- Sustainable image for your restaurant
Disadvantages:
- No control over which vegetables you receive
- Harder to plan a consistent menu
- Cost price per dish varies week to week
- Possible waste if you can't use certain vegetables
⚠️ Note:
Keep track of how much of each vegetable package you actually use. If you regularly throw away vegetables, your actual cost price will be higher than calculated.
Alternative: average cost price method
If cost allocation becomes too complex, you can also work with an average cost price per kilo. Divide your weekly subscription costs by the total usable weight you receive.
This method is less accurate, but gives you quick insight into your overall costs. For restaurants that use many different vegetables, this can be more practical than individual allocation.
How do you calculate the margin on subscription vegetables? (step by step)
Inventory your weekly package
Weigh and note all vegetables you receive. Track this for at least 4 weeks to get an average of what you receive per subscription.
Look up market prices for cost allocation
Determine what each ingredient would cost from a regular supplier. Use these prices to calculate the share of each ingredient in your subscription costs.
Calculate actual costs per ingredient
Multiply your total subscription costs by the percentage that each ingredient represents. This gives you the actual costs per ingredient for your food cost calculation.
Monitor waste and adjustments
Keep track of how much you actually use versus throw away. Adjust your calculation for waste to get your actual costs per usable ingredient.
✨ Pro tip
Track your subscription's market value ratio for 4 weeks, then use that average percentage to allocate costs going forward. This eliminates weekly calculations while maintaining 85% accuracy.
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
Can I just divide the total package amount by the weight?
That gives an inaccurate picture because not all vegetables cost the same. Mushrooms cost more than potatoes, so divide based on market value for fairer cost allocation.
What if I can't use some vegetables from the package?
Factor waste into your costs. If you throw away 20%, divide your total package costs by 80% of the weight to get your actual costs per usable ingredient.
How often should I update my cost allocation?
Check monthly whether your package composition still matches your calculation. Seasonal changes can significantly alter the vegetable mix.
Is a vegetable subscription always cheaper than regular purchasing?
Not always. Calculate what you actually pay per usable ingredient and compare with supplier prices. Account for waste and time saved on ordering.
Can I adjust my menu price to the weekly package?
You can, but it makes your cost price calculation complex. Many restaurants work with an average cost price over several weeks to maintain stable menu prices.
Should I track individual vegetable costs or use an average rate?
Individual tracking gives more accurate margins but requires weekly calculations. Average rates work for high-volume kitchens where precision matters less than speed.
📚 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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