A restaurant owner in Amsterdam saved €12,000 annually by switching just three dishes to seasonal ingredients. But how much can you actually save? By systematically calculating cost price reductions, you'll identify which seasonal switches boost your profit most.
Why seasonal ingredients cost less
Seasonal ingredients cost less because:
- No transport from distant countries
- High supply drives prices down
- No extra storage or greenhouse costs
- Suppliers have surpluses they need to move
The difference can hit 30-60%. Asparagus costs €8/kg in May, €18/kg in December.
Calculate your current cost price per dish
Before calculating savings, you need your current costs.
? Example:
Salad with tomatoes (winter):
- Tomatoes: 150g at €6/kg = €0.90
- Lettuce: 80g at €4/kg = €0.32
- Other ingredients: €2.50
Total cost price: €3.72
Add up all ingredients you can replace with seasonal alternatives. Note current prices per kilo and quantities used.
Find seasonal alternatives and their prices
Check with suppliers what's available in season and pricing:
- Which vegetables are in season now?
- What's the cost per kilo?
- Can you use the same quantity?
- Do they work in your dish?
? Example:
Same salad in summer:
- Tomatoes: 150g at €2.50/kg = €0.38
- Lettuce: 80g at €2/kg = €0.16
- Other ingredients: €2.50
New cost price: €3.04
Calculate the cost price reduction
Now you can calculate exact savings:
Formula:
Cost price reduction = Old cost price - New cost price
Savings percentage = (Cost price reduction / Old cost price) × 100
? Example:
Cost price reduction salad:
- Savings per portion: €3.72 - €3.04 = €0.68
- Percentage: (€0.68 / €3.72) × 100 = 18.3%
At 50 salads per week: €0.68 × 50 × 52 = €1,768 per year
Most kitchen managers discover too late that they've been calculating seasonal savings wrong - they forget to account for varying availability periods and end up overestimating their annual benefits.
Calculate the impact on an annual basis
You'll only see real value by calculating for a full year:
Formula:
Annual savings = Savings per portion × Number of portions per week × 52 weeks
⚠️ Note:
Only count weeks when seasonal product is available. Asparagus runs just 12 weeks per year, not 52.
Create an overview of all adaptable dishes. Add up all savings for the complete picture.
Account for menu adjustments
Seasonal cooking sometimes requires menu changes:
- Developing new recipes takes time
- Guests need adjustment periods
- Not all seasonal products maintain quality throughout their season
- You must stay flexible if deliveries fail
Factor this extra time and effort into your decision. But cost savings usually justify the effort.
Tools to track seasonal prices
For effective seasonal purchasing, you need oversight of:
- Current purchase prices per supplier
- Cost prices of all dishes
- Impact of price changes on margins
With tools like KitchenNmbrs you can quickly test different ingredients and identify the most profitable switches. You immediately see how price changes affect your food cost.
How do you calculate cost price reduction through seasonal ingredients?
Inventory current cost prices
Make a list of dishes you can adapt with seasonal ingredients. Add up all ingredient costs per dish that you can replace. Note the current price per kilo and the quantity you use per portion.
Check seasonal prices with suppliers
Ask your supplier about prices for seasonal alternatives. Pay attention to availability (how many weeks per year) and quality. Calculate what the same quantity would cost with the seasonal product.
Calculate savings and project them
Subtract the new cost price from the old cost price per portion. Multiply by number of portions per week and number of weeks the seasonal product is available. This gives you the total annual savings per dish.
✨ Pro tip
Calculate potential savings for your 3 highest-volume dishes over the next 8 weeks. Focus on items you sell 30+ portions weekly - these deliver 70% of your seasonal savings potential.
Calculate this yourself?
In the KitchenNmbrs app you can do this in just a few clicks. 7 days free, no credit card.
Calculate it yourself?
Our free food cost calculator does it in seconds.
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Frequently asked questions
How much can I save by cooking seasonally?
Do I need to adapt my entire menu for seasonal ingredients?
How often should I recalculate my cost prices?
What if my supplier can't guarantee seasonal deliveries?
Should I change prices when switching to seasonal ingredients?
How do I handle staff training for seasonal menu changes?
Can I plan seasonal prices in advance?
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.
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