A yield test is like weighing your luggage before and after a long trip - you'll be shocked by what disappeared along the way. With meat, you're measuring the difference between what you buy and what actually makes it to the plate. Skip this step and you're essentially giving away money with every portion you serve.
What is a yield test?
A yield test measures the gap between your purchase weight and your servable weight. Take a 5 kg beef tenderloin - after you've trimmed fat, removed sinew, and portioned it properly, you might end up with just 3.2 kg of steaks ready for service.
That missing 1.8 kg represents your processing loss. And the reality - you paid for all 5 kg, but you can only sell 3.2 kg. This loss must be built into your true cost calculations.
💡 Example:
You buy a whole beef tenderloin of 5 kg for €18/kg:
- Purchase price: 5 kg × €18 = €90
- After processing: 3.2 kg usable steak
- Yield: 3.2 ÷ 5.0 = 64%
- Actual cost price: €90 ÷ 3.2 kg = €28.13/kg
So you're not paying €18/kg, but €28.13/kg for usable meat.
Why yield tests matter for your bottom line
Operating without yield tests means you're pricing dishes based on fantasy numbers. Using our example, you think meat costs €18/kg when it's actually €28.13/kg. That €10.13 difference per kilo vanishes from your profit margin - the kind of thing you only learn after closing your first month at a loss.
- Your food cost calculations become fiction
- Menu prices get set dangerously low
- Each plate served chips away at profitability
- Monthly P&L results leave you scratching your head
⚠️ Watch out:
Too many kitchens guess at yield instead of measuring it. A 5% estimation error can drain hundreds of euros monthly from your most popular dishes.
Standard yield percentages by meat type
Different proteins deliver vastly different yields. These numbers give you a baseline, but your supplier and butchering technique will create variations:
- Beef (whole piece): 60-75%
- Pork (whole loin): 70-80%
- Lamb (leg): 55-65%
- Chicken (whole): 65-75%
- Fish (whole): 45-60%
Your supplier's sourcing, seasonal factors, and knife skills all impact final yield. That's why measuring beats guessing every time.
Whole pieces vs. pre-portioned purchasing
Pre-cut steaks eliminate yield testing entirely - what you buy is what you serve. But you'll pay a premium because the supplier handled processing costs and labor.
💡 Comparison:
Buying steak - two options:
- Whole tenderloin: €18/kg → after yield test €28.13/kg usable meat
- Cut steak: €32/kg directly usable
Difference: €3.87/kg advantage for cutting yourself, plus you have control over portion size.
Timing your yield test schedule
Yields shift due to multiple variables. Plan to retest at these intervals:
- New supplier switch: quality standards vary significantly
- Seasonal changes: animal fat content fluctuates throughout the year
- Staff turnover: different butchering skills affect final yields
- Quarterly reviews: catch gradual changes in supplier quality
⚠️ Watch out:
Run yield tests across 3 separate deliveries minimum to establish reliable averages. Single measurements can mislead due to one-off quality variations.
Recording and tracking results
Document every yield test to identify patterns and track supplier consistency. Record these data points:
- Test date and supplier name
- Original purchase weight and unit cost
- Final usable weight after processing
- Calculated yield percentage
- True cost per kg of servable product
Food cost management tools can store yield percentages per ingredient, automatically adjusting your recipe costs without manual recalculation each time.
How do you perform a yield test? (step by step)
Weigh the whole piece of meat
Weigh the meat immediately after delivery, including packaging. Note the exact weight and the purchase price per kilo. This is your starting point for the calculation.
Process the meat completely
Trim, cut and portion the meat as you normally do for your dishes. Keep all usable pieces and also weigh the waste (fat, sinew, bones).
Calculate yield and actual cost price
Divide the usable weight by the purchase weight to get your yield percentage. Divide the total purchase cost by the usable weight to get your actual cost price per kilo.
✨ Pro tip
Test yields on 3 consecutive weekly deliveries from the same supplier - you'll often discover a 5-8% variance that could represent hundreds in monthly savings on high-volume items.
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 test yield on different delivery days?
Absolutely - meat quality can vary based on supplier storage and transport schedules. Tuesday deliveries might yield differently than Friday ones due to varying storage times at the distributor.
What's the minimum sample size for reliable yield data?
Test at least 3 separate deliveries of the same product to establish meaningful averages. Single tests can be misleading due to one-off quality variations from your supplier.
Can I apply one supplier's yield data to another supplier's products?
Never assume yields transfer between suppliers. Each source has different quality standards, aging processes, and trimming practices that significantly impact final usable weight.
📚 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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