Trim loss can significantly increase your cost price without you realizing it. Many entrepreneurs calculate based on the purchase price per kilo, but forget that they have less product after processing. In this article, you'll learn step-by-step how to correctly account for trim loss in your cost price.
What exactly is trim loss?
Trim loss is the difference between what you purchase and what you ultimately put on the plate. With whole fish you lose the head, bones, and skin. With meat you lose fat and sinews. With vegetables you lose peels and outer leaves.
💡 Example:
You buy whole salmon for €18.00 per kilo. After filleting you have left:
- Purchase weight: 2.0 kg
- Fillet after processing: 1.1 kg
- Trim loss: 0.9 kg (45%)
Your actual fillet price: €32.73 per kilo!
The correct formula for actual cost price
This is where things often go wrong. Trim loss means your product becomes more expensive, not cheaper. After all, you have less product for the same money.
Formula for actual cost price:
Actual price = Purchase price ÷ (Yield % ÷ 100)
Where: Yield % = 100% - Trim loss %
⚠️ Note:
NEVER multiply by the trim loss percentage. You divide by the yield. This is the most common mistake in cost price calculation.
Typical trim loss by product category
Use these percentages as a guideline for your calculations:
- Fish (whole to fillet): 40-55%
- Beef (whole to portions): 15-25%
- Shrimp (unpeeled): 35-50%
- Vegetables (peels): 15-25%
- Fruit (peels, pits): 20-40%
💡 Beef calculation example:
Whole beef cut €24.00/kg, 20% trim loss:
- Yield: 100% - 20% = 80%
- Actual price: €24.00 ÷ 0.80 = €30.00/kg
- Extra cost per kilo: €6.00
At 200 gram portions, trim loss costs you €1.20 extra per plate.
Impact on your food cost percentage
Trim loss can significantly increase your food cost. If you don't factor this into your calculation, your dish appears profitable when you're actually running at a loss.
💡 Impact example:
Fish dish €28.00 (excl. VAT €25.69):
- Incorrectly calculated (€18/kg): food cost 28%
- Correctly calculated (€32.73/kg): food cost 38%
- Difference: 10 percentage points!
On an annual basis at 2000 portions: €5,140 difference
Practical tips for the kitchen
Measure your trim loss a few times to determine your average. Note the purchase weight and the weight after processing. This gives you a realistic picture of your actual costs.
- Weigh products before and after processing
- Account for seasonal variations
- Regularly check if your supplier delivers consistently
- Train your team to handle trim loss consciously
With a system like KitchenNmbrs you can automatically account for trim loss in your cost price calculation, so you always see your actual costs.
How do you calculate trim loss in your cost price? (step by step)
Measure your actual trim loss
Weigh the product before processing and after processing. Calculate the percentage: ((purchase weight - final weight) ÷ purchase weight) × 100. Do this a few times to determine your average.
Calculate your yield percentage
Subtract your trim loss from 100%. At 30% trim loss you have 70% yield. This is the percentage of product you can actually use.
Divide purchase price by yield
Divide your purchase price per kilo by the yield (as a decimal). At €20/kg and 70% yield: €20 ÷ 0.70 = €28.57/kg actual cost price. Use this amount in your recipe calculation.
✨ Pro tip
Check your trim loss on your 3 most expensive ingredients. That's usually where the biggest impact on your profit margin is hidden.
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 always account for trim loss in my cost price?
Yes, otherwise you calculate with a cost price that's too low and lose money on every dish. Trim loss is a real cost item that you can't ignore.
What if my trim loss varies every week?
Take an average over a month. Measure regularly and adjust your calculation if you consistently have more or less loss than expected.
Can I reduce trim loss?
Partially yes. Better cutting technique, staff training, and more conscious purchasing help. But some trim loss will always remain with fresh products.
How do I calculate trim loss for composite dishes?
Calculate the actual cost price after trim loss for each ingredient. Add all ingredients together for the total cost price of the dish.
Does trim loss differ by supplier?
Yes, product quality and size can vary. So regularly check your actual yields and adjust where necessary.
📚 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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