I'll admit something that took me years to figure out: your biggest profit leaks happen when nobody's watching. You've got perfect recipes and clear portion guidelines, but somehow your food costs keep creeping up. The kitchen team swears they're following everything to the letter.
Why this matters so much
You've made clear agreements about portion sizes, recipes and working methods. But during dinner rush, things change fast. A chef who portions 'generously', a cook who adds ingredients not in the recipe, or staff using different suppliers than agreed.
The result? Your food cost climbs without you knowing why. You lose control of your margins.
Daily signals you can check
1. Usage vs. sales doesn't add up
Track this every day: how many portions of your top dishes did you sell? And how much ingredients were actually used?
💡 Example:
Yesterday sold: 40 portions of steak
- According to recipe: 40 × 200g = 8 kg meat needed
- Actually used: 11 kg meat
- Difference: 3 kg = 37.5% more than planned
Signal: Portions are too generous or there's significant trimming waste
2. Unexpected inventory discrepancies
Count your key ingredients weekly. If more disappears than you can explain through sales, something's happening behind the scenes.
3. Food cost percentage rises unexpectedly
Your food cost jumps from 30% to 35% without suppliers raising prices? Someone's working differently than you agreed.
⚠️ Watch out:
A 5 percentage point increase in food cost can cost you €20,000 per year on €400,000 turnover. Check this weekly, not monthly.
Signals from your team
Guests complaining about inconsistency
Customers saying their dish "tasted different than last time" or "was smaller"? You're not sticking to fixed recipes.
Discussions about ingredients
You hear your team asking "which oil are we using now" or "how much sauce goes in"? Then agreements aren't clear or aren't being followed.
Improvisation becomes the norm
Regular comments like "let's just do it this way" or "this works better" mean your standards are slipping away.
💡 Examples of signals:
- "We didn't have basil so I used parsley instead"
- "I make the portions a bit bigger, guests like it better"
- "That supplier was too expensive, I bought it somewhere else"
These seem like small things, but they systematically destroy your cost structure.
Financial signals
From tracking this across dozens of restaurants, I've noticed these patterns show up consistently before major cost overruns hit.
Margin per dish declines
Calculate monthly profit margins for your 5 top sellers. Declining margins without supplier price changes? Recipes are being ignored.
Unexplained cost increases
Your purchasing costs climb while selling prices stay flat. And suppliers haven't raised prices. Money's leaking somewhere.
Break-even point shifts
You suddenly need more revenue to break even? Your variable costs increased. Often due to kitchen deviations.
How do you tackle this?
Make deviations discussable
Skip the blame, focus on understanding. "I see we're using more meat than planned - what's happening?" Often there are valid reasons you can address.
Set clear boundaries
Define margins for acceptable improvisation. Example: "Portion size can vary by 10%, but not more."
Monitor systematically
Use tools like KitchenNmbrs to compare daily usage against sales. You'll spot deviations within 24 hours instead of waiting a month.
⚠️ Watch out:
Don't monitor to punish, but to understand. People often deviate because they're solving problems you can't see.
Concrete action for tomorrow
Pick one signature dish. Count tonight how many you sold. Count tomorrow morning how much of the main ingredient you used. Does it match your recipe?
If numbers don't align, start the conversation. Not: "Why are you doing this wrong?" But: "I see a difference - help me understand what's happening."
You'll often discover improvements to recipes, purchasing or methods that would've stayed hidden otherwise.
How do you monitor deviations systematically?
Set up daily checkpoints
Choose 3 top dishes and check daily: number sold vs. ingredients used. Note deviations larger than 15%. This takes 10 minutes a day but prevents big surprises.
Create a weekly team meeting
Discuss the numbers with your team every week. No blame, but together look for causes of deviations. Often they have good reasons you can solve.
Document and adjust
If a deviation turns out to be structural (for example more trimming waste than expected), adjust your recipe instead of ignoring it. That way your numbers stay realistic.
✨ Pro tip
Check your prep waste bins every 72 hours for unusual patterns. If you're suddenly seeing more vegetable trimmings or protein scraps, someone changed their cutting technique or started over-ordering to avoid running out.
Calculate this yourself?
In the KitchenNmbrs app you can do this in just a few clicks. 7 days free, no credit card.
Was this article helpful?
Frequently asked questions
How often should I check this without demotivating my team?
Check the numbers daily, discuss with the team weekly. Frame it as "getting better together" instead of "checking up". Focus on big deviations (>15%), not small variations.
What if my chef says the recipes don't work in practice?
Listen carefully and adjust where needed. Recipes are tools, not sacred texts. If a chef consistently deviates, there's often a valid reason that can improve your recipe.
What deviation is still acceptable?
Up to 10-15% deviation in ingredient usage is normal due to trimming waste and portion variation. Above 20% signals something structural that needs attention.
How do I prevent this from creating an atmosphere of distrust?
Communicate that you want to understand differences together. Share the financial impact: "If we use 20% more meat, we can invest less in new equipment." Make it collaborative.
What if I don't have time for daily checks?
Start with weekly checks of your 3 best-selling dishes. Use an app that automatically calculates expected usage vs. actual usage to save time.
Should I track waste differently for expensive ingredients like seafood?
Absolutely - premium ingredients deserve tighter monitoring with 5-8% acceptable variance instead of 15%. Track prep waste separately from service waste to pinpoint exactly where losses occur.
⚠️ EU Regulation 1169/2011 — Allergen Information — https://eur-lex.europa.eu/eli/reg/2011/1169/oj
The allergen information on this page is based on EU Regulation 1169/2011. Recipes and ingredients may vary by supplier. Always verify current allergen information with your supplier and communicate this correctly to your guests. KitchenNmbrs is not liable for allergic reactions.
In the UK, the FSA enforces allergen regulations under the Food Information Regulations 2014.
📚 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.
Give your team insight into the numbers
When your team understands what dishes cost, their behavior changes. KitchenNmbrs makes food cost visible to everyone in the kitchen. Start your free trial.
Start free trial →