Many restaurant owners assume package price changes are the only cost increases to watch - but suppliers routinely shrink package sizes while maintaining the same price point. This stealth inflation directly impacts your per-portion costs, even when your invoice totals look identical.
Why packaging adjustments increase your cost price
Suppliers frequently reduce package contents to mask price hikes. They maintain identical package pricing but reduce the actual product quantity. Result: you're paying significantly more per kilogram without immediate awareness.
⚠️ Heads up:
Verify packaging sizes with each delivery. A 100-gram reduction per box can generate thousands in additional annual costs.
Calculate the new cost price
Your formula remains unchanged, but you'll divide by the updated weight:
New cost price per kg = Price per package / New contents in kg
💡 Example:
Your supplier delivers chicken thighs:
- Previous package: 5 kg for €22.50 = €4.50/kg
- Current package: 4.5 kg for €22.50 = €5.00/kg
Cost increase: €0.50 per kilogram = 11% price jump
Calculate the impact on your dishes
Each cost adjustment affects your food cost percentage. Determine the per-dish financial impact:
Additional costs per portion = Difference per kg × Portion amount in kg
💡 Example:
You use 200 grams of chicken thigh per dish:
- Cost increase: €0.50/kg
- Per portion: €0.50 × 0.2 kg = €0.10 additional cost
- At 100 weekly portions: €520 annual increase
This requires €0.10 menu price adjustment or alternative cost management
Explore alternatives
Sometimes switching suppliers or package sizes proves more economical. Always compare per-kilogram pricing, not package costs. From analyzing actual purchasing data across different restaurant types, establishments that actively monitor per-unit costs save 8-12% annually on ingredient expenses.
- Verify if alternative suppliers maintain original package sizes
- Inquire about bulk packages (typically cheaper per kilogram)
- Evaluate different brands or quality grades
- Calculate menu price adjustment requirements
💰 Money-saving tip:
Maintain a per-kilogram cost reference list. Update it with each delivery so you'll immediately spot product price increases.
Administration and control
Ensure your staff understands that package dimensions can shift. Train them to weigh packages or verify contents when uncertain.
Food cost management tools can help you quickly input updated cost prices and immediately assess dish-level food cost implications. This prevents minor changes from creating major profit impacts.
How do you calculate the new cost price per portion?
Check the new package size
Weigh the new package or check the label. Note the exact weight and compare it with what you received before. Often the new contents are printed in small letters on the package.
Calculate the new price per kilo
Divide the price per package by the new contents in kilograms. Compare this with your old price per kilo to see the difference.
Update your recipes and cost prices
Adjust all dishes that contain this ingredient. Calculate the new cost price per portion and check if your food cost percentage is still on track.
✨ Pro tip
Document package weight changes by photographing old versus new packaging with a scale reading. Update your cost calculations within 48 hours to maintain accurate food cost percentages.
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 raise menu prices if packaging gets smaller?
That depends on your food cost percentage increase. If you exceed 35% food cost, price adjustments are typically necessary for profitability. Calculate the exact impact first.
How frequently do suppliers modify package sizes?
This occurs 1-2 times annually, particularly during inflationary periods. Suppliers use this method to disguise price increases, so verify contents with each delivery.
Can I switch suppliers if packages become too small?
Absolutely - always compare per-kilogram pricing between suppliers. Alternative suppliers might maintain original package sizes or offer better per-unit rates.
Must I discard existing stock when packages change?
No, use current inventory normally. Only adjust cost calculations for new deliveries moving forward. Don't blend old and new pricing in your calculations.
How do I prevent staff from missing these changes?
Train kitchen staff to inspect packages upon arrival and immediately report discrepancies like smaller packages or different weights than expected.
What's the best way to track packaging changes over time?
Create a monthly log comparing package weights and per-kilogram costs. This documentation helps identify patterns and supports supplier negotiations when discussing pricing adjustments.
📚 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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