Restaurant kitchens that track their homemade stock costs accurately see profit margins improve by 3-7%. Most chefs underestimate what their stock actually costs by forgetting energy, yield loss, and time factors. Here's how to calculate the true cost price of dishes made with homemade stock.
Why homemade stock cost price calculation is complex
Ready-made stock is straightforward: €2.50 per liter, done. Homemade stock? That's where hidden costs sneak up on you.
- Ingredients: Bones, vegetables, herbs
- Energy: Hours of cooking on the stove
- Labor: Time for preparation and monitoring
- Yield: From 5 kg of bones you might get 3 liters of stock
⚠️ Watch out:
Most kitchens only calculate ingredient costs and skip energy plus time. Makes homemade stock appear cheaper than reality.
Calculate the ingredient costs of your stock
Start with every single ingredient that goes into your pot. Yes, even that bay leaf and the carrot ends you'd normally toss.
💡 Example beef stock:
For 4 liters of stock you use:
- 3 kg beef bones: €9.00
- 500g mirepoix (onion, carrot, celery): €1.50
- Herbs and spices: €0.75
- 8 liters water: €0.02
Total ingredient costs: €11.27
Factor in energy costs
Making stock eats energy. An average burner pulls 2 kW per hour. Six hours of simmering at €0.30 per kWh? That's €3.60 in electricity.
Formula: Power consumption (kW) × Hours × Energy rate per kWh
Determine your yield (how much stock do you get?)
You won't get back what you put in. Evaporation and reduction mean 8 liters of water becomes 4-5 liters of stock. Always measure this - it's what most kitchen managers discover too late when their food costs don't add up.
💡 Yield calculation:
Started with 8 liters of water, ended with 4 liters of stock.
Yield: 4 liters ÷ 8 liters = 50%
Track this percentage for future batches.
Calculate the cost price per liter of stock
Now you've got the real numbers:
Cost per liter = (Ingredients + Energy) ÷ Actual liters produced
💡 Complete calculation:
- Ingredients: €11.27
- Energy (6 hours × 2 kW × €0.30): €3.60
- Total costs: €14.87
- Output: 4 liters of stock
Cost price: €14.87 ÷ 4 = €3.72 per liter
Use the stock in your dish cost price
Now you know your stock's true cost, plug it into dish calculations. Using 200ml of stock in a stew? That's €0.74 worth of stock (200ml × €3.72 per liter).
⚠️ Watch out:
Kitchens often guess stock costs at €1.00 per liter. Reality? Usually €3-5 per liter. That gap destroys your food cost accuracy.
Including labor or not?
Labor's the tricky bit. If your chef makes stock while prepping other things, skip labor costs. But if someone's dedicated to stock-making for 3 hours? Add €20-25 per hour.
Most restaurants stick with ingredients plus energy only. Keeps calculations simple while staying realistic.
How do you calculate the cost price of homemade stock? (step by step)
Weigh and note all ingredients
Write down what you use: bones, vegetables, herbs. Calculate what each ingredient costs based on your purchase prices. Add everything together for total ingredient costs.
Calculate energy costs
Check how many hours you simmer the stock and at what power. Multiply kW × hours × energy price per kWh. For 6 hours at 2 kW at €0.30 per kWh = €3.60.
Measure your yield
Measure how many liters of stock you end up with after simmering. This is usually 50-70% of your starting water. Divide total costs by number of liters for cost price per liter.
✨ Pro tip
Make stock in 8-liter batches every Tuesday morning and freeze in pre-measured 250ml containers. You'll know exactly what each portion costs without daily calculations.
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
Should I include labor costs in stock cost price?
Only if someone's dedicated solely to making stock. If your chef multitasks while the stock simmers, skip labor costs. Focus on ingredients and energy for practical calculations.
Is homemade stock always more expensive than store-bought?
Usually, yes. Homemade typically runs €3-5 per liter versus €2-3 for commercial stock. You're paying extra for superior flavor and quality, not savings.
What if my yield varies between batches?
Track your last 5 batches and use the average yield for cost calculations. Most stocks yield 50-70% of starting liquid volume. Consistency improves with practice and standardized recipes.
📚 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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