Quarterly price fluctuations turn your carefully calculated food costs into guesswork. You're building recipes with January prices while your April invoices show 15% increases. Setting up a price tracking system prevents these costly surprises.
Why quarterly prices disrupt your cost price
Most suppliers adjust prices every 3 months. Meat, fish and vegetables see the biggest swings. But your recipes stay frozen in time while purchasing costs climb steadily.
? Example:
Your steak recipe from January:
- Entrecote 250g: €6.25 (€25/kg)
- Garnish: €2.10
- Total ingredients: €8.35
April price review: entrecote becomes €29/kg
New cost price: €9.35 (+€1.00 per portion)
Serve 50 steaks weekly and you'll lose €2,600 annually without updating those numbers.
The 3-price system for stable cost prices
Track three different prices per ingredient to smooth out fluctuations:
- Current price: what you're paying today
- Average price: mean of last 4 quarters
- Worst-case price: highest price from past year + 10%
Always use the worst-case price for cost calculations. You'll never get caught short.
? Example salmon:
Price progression over the past year:
- Q1: €22/kg
- Q2: €26/kg
- Q3: €24/kg
- Q4: €28/kg
Average: €25/kg
Worst-case for cost price: €30.80/kg (€28 + 10%)
Automatic price update routine
Create a monthly system that catches price changes before they hurt:
- First week monthly: review previous month's invoices
- Flag deviations: which products jumped 5%+ either direction?
- Update recipes: adjust cost calculations with new prices
- Review menu: do selling prices need adjustment too?
⚠️ Note:
Don't update everything simultaneously. Pick your 3 costliest ingredients first. This approach keeps the workload manageable.
Seasonal compensation in your cost price
Some ingredients spike predictably during certain months. Most kitchen managers discover too late that they should've built buffers for these seasonal swings:
- Asparagus: off-season prices run 200-300% higher
- Shellfish: Christmas/New Year brings 30-50% increases
- Lamb: Easter season adds 20-40% to costs
Calculate using peak season prices year-round, even during cheaper periods.
? Example asparagus season:
Dutch asparagus cost price:
- April-June (season): €8/kg
- Rest of year: €24/kg
Always calculate with €24/kg in your cost price
During season you make extra margin, outside season you're covered
Digital vs manual tracking
Excel price lists become outdated fast. With 50+ ingredients, manual tracking becomes impossible. Many operators use tools like KitchenNmbrs to maintain centralized pricing and automatically recalculate recipe costs.
The benefit: adjust one ingredient price and every recipe using that ingredient updates instantly. You'll immediately spot which dishes cost more and whether menu prices need adjusting.
Related articles
How do you calculate purchase price per portion with quarterly price reviews?
Collect price history per ingredient
Go through your invoices from the last 12 months. Note the price per kg/liter for each main ingredient per quarter. Focus first on your 10 most expensive ingredients.
Calculate worst-case price per ingredient
Take the highest price from the past year and add 10% to it. This becomes your calculation price for cost price calculations. This way you're always on the safe side.
Update cost price per recipe
Recalculate the cost price of each dish with the new worst-case prices. Divide the total ingredient costs by your selling price excl. VAT for your food cost percentage.
Check your food cost and menu prices
If your food cost comes above 35%, you need to raise your menu price or adjust your recipe. Calculate your new minimum price: cost price divided by desired food cost.
Set up monthly check routine
Schedule 30 minutes every first week of the month to check invoices for price changes. Immediately update your cost prices if an ingredient changes 5% or more.
✨ Pro tip
Track your 3 highest-volume dishes monthly for ingredient cost creep over 8%. These items drive 60-70% of your food cost variance, so catching increases early protects overall profitability.
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 update my cost prices?
Should I track all ingredients or only the main ones?
How do I prevent becoming too expensive by using worst-case prices?
Can I make contract agreements to limit price fluctuations?
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
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.
kennisbank.more_in_category
Related questions
Explore more topics
Optimize your purchasing with data
Know exactly which supplier is most cost-effective and how price changes affect your margins. KitchenNmbrs links purchasing directly to recipe costs. Try it free for 14 days.
Start free trial →