Launching a new dish is like planting a garden - timing determines if you'll harvest profits or watch costs wither your margins. Most restaurants launch dishes based on gut feeling, missing opportunities to optimize seasonal purchase prices. Here's how to calculate the ideal launch time based on ingredient costs and seasonal patterns.
Why timing is crucial for your profit margin
Launching a new dish in the wrong season can spike your food cost by 30-50%. Tomatoes cost €8 per kilo in January, €3 per kilo in August. Launch your tomato burrata in winter, and your food cost starts at a huge disadvantage.
💡 Example:
You want to launch an asparagus salad:
- March (out of season): €18/kg asparagus
- May (in season): €6/kg asparagus
- Difference per portion (200g): €2.40
At 100 portions per week: €12,480 difference per year!
The 3 factors that determine your launch timing
1. Seasonal purchase prices of main ingredients
Track the prices of your main ingredients throughout a full year. Create a spreadsheet with monthly prices from your supplier.
2. Guest demand patterns
Warm soups don't sell well in July. Cold salads bomb in January. Check your register data from last year for similar dishes.
3. Competition and market conditions
If everyone offers the same seasonal dish, the market gets saturated. Timing just before or after the peak can be smarter.
⚠️ Note:
Always calculate with selling price excluding VAT. A dish priced at €24 incl. VAT is €22.02 excl. VAT. Your food cost calculation must be based on this.
Calculate your optimal launch window
For each potential dish, create a 12-month cost overview. This shows you exactly where your food cost hits rock bottom. Based on real restaurant P&L data, dishes launched during optimal seasons show 23% higher profit margins than off-season launches.
💡 Example: Pumpkin Risotto
Cost per portion throughout the year:
- January: €8.50 (pumpkin from storage)
- October: €4.20 (fresh harvest)
- Food cost at €28 selling price: 30% vs 15%
Optimal launch time: September-November
The formula for seasonal-based cost price
Use this calculation to find your ideal launch time:
Seasonal Food Cost % = (Lowest seasonal ingredient price / Selling price excl. VAT) × 100
Compare this with your target food cost (usually 28-35% for restaurants). If your seasonal food cost falls below your target, you've got room for marketing and promotions.
Practical planning: think 3 months ahead
Start your development 3 months before the optimal season. This allows you to:
- Test and refine recipes
- Train staff on new preparations
- Prepare marketing
- Inform suppliers about expected volumes
💡 Example planning:
For a summer gazpacho menu:
- February: recipe development
- March: calculate costs and set prices
- April: train staff
- May: launch (tomatoes become cheaper)
How seasonal planning tools help
With a proper tracking system, you can monitor seasonal prices per ingredient. You see directly how your food cost changes as ingredient prices fluctuate. This way you plan launches at the optimal moment without endless Excel calculations.
How do you calculate the ideal launch time? (step by step)
Collect 12 months of price data for main ingredients
Ask your supplier for a yearly price overview, or track monthly purchase prices of your key ingredients yourself. Pay special attention to seasonal products like vegetables, fruit, and fish.
Calculate food cost per month for your new dish
Use the formula: (total ingredient costs / selling price excl. VAT) × 100. Do this for each month to see when your food cost is lowest.
Choose the optimal launch window
Select the period when your food cost is below your target (usually below 32%). Plan your launch 2-3 weeks after the start of this season, so ingredients are stably available.
✨ Pro tip
Track your 15 most expensive ingredients across 12 months and launch dishes during the 6-week window when primary ingredients hit their annual price floor. This timing strategy typically cuts food costs by 18-27% compared to random launch dates.
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 always wait for the cheapest season?
Not always. If your food cost in the 'expensive' season still stays below 35%, you can launch then too. Sometimes less competition is more valuable than lower purchase costs.
How do I forecast seasonal prices for next year?
Use the average prices from the past 2-3 years as a basis. Account for inflation (usually 2-5% per year) and ask your supplier about their expectations.
What if my main ingredient doesn't have a clear season?
Focus on the supporting ingredients and guest demand. Pasta has no season, but pasta with mushrooms does. Weather patterns also influence what guests want to eat.
Can I launch multiple dishes at once?
Better not to. Focus on one new dish at a time, so your kitchen team can learn it well and you can analyze sales figures properly. After 4-6 weeks you can introduce the next dish.
How long should I keep a seasonal dish on the menu?
As long as your food cost stays under control. Usually 3-4 months for a truly seasonal dish. Monitor your purchase prices weekly and remove the dish if food cost rises above 38%.
Should I adjust my selling price based on seasonal ingredient costs?
Generally no - frequent price changes confuse customers. Instead, build your menu price around the highest seasonal cost, then enjoy better margins during cheaper seasons.
How do I handle dishes with multiple seasonal ingredients that peak at different times?
Map out each ingredient's cost curve and find the overlap period where total costs are lowest. Sometimes you'll need to substitute one ingredient to hit the optimal window for the others.
📚 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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