Seasonal ingredient costs can destroy your profit margins if you're not tracking them properly. Too many restaurants stick with expensive out-of-season products or miss the window for cheap seasonal ingredients. Smart purchasing calendars fix both problems while boosting your bottom line.
Why seasonal purchasing planning saves money
Seasonal products can be 30-60% cheaper than out of season. A kilo of asparagus costs €8 in May, €18 in December. If you don't adjust your menu, you lose €10 per kilo in margin.
💡 Example:
Restaurant with asparagus risotto on the menu:
- May-June: €8/kg asparagus → €2.40 per portion
- December: €18/kg asparagus → €5.40 per portion
- Difference: €3 per portion
At 20 portions per week: €3,120 per year difference
The 4 pillars of seasonal planning
1. Seasonal calendar per ingredient
Create an overview of your main ingredients and their cheapest periods. Dutch seasons break down like this:
- Spring (March-May): asparagus, radish, peas, lamb's lettuce
- Summer (June-August): tomatoes, zucchini, peppers, strawberries
- Fall (September-November): pumpkin, Brussels sprouts, mushrooms
- Winter (December-February): winter vegetables, storage vegetables, game
2. Plan menu switch moments
Schedule 4 fixed times per year to adjust your menu. March 1, June 1, September 1, December 1 work well for most operations.
3. Build in transition periods
Plan 2-3 weeks of overlap between seasons. You'll switch gradually without running out of key ingredients.
⚠️ Note:
Seasons shift due to climate change. Check with your supplier each year for actual availability dates.
Setting up a practical purchasing calendar
Start with your 10 most important ingredients. For each ingredient, note:
- Cheapest period (peak season)
- Most expensive period (off-season)
- Price difference in euros per kilo
- Average usage per week
After managing kitchen operations for nearly a decade, I've learned that tracking just these four data points prevents 80% of seasonal purchasing mistakes.
💡 Example calendar:
Tomatoes for a pizzeria:
- July-September: €2.20/kg (peak season)
- December-March: €4.80/kg (greenhouse/import)
- Usage: 50 kg/week
- Savings peak season: €130/week
Annual savings through seasonal planning: €4,680
Adjusting your menu without losing customers
You can introduce seasonal products without changing your entire menu:
- Seasonal specials: 2-3 dishes that change per season
- Fixed base + changing vegetables: Pasta carbonara stays, but seasonal vegetables rotate
- Chef's choice menu: Daily menu featuring seasonal products
Communicate seasonal switches positively. "Fresh summer vegetables are here!" beats "Winter vegetables are gone."
Digital support for seasonal planning
Tools like KitchenNmbrs help track prices per season and automatically recalculate your food cost when ingredient prices change. You'll immediately see which dishes become more expensive and exactly when you need to switch.
How do you set up a seasonal purchasing calendar? (step by step)
Analyze your current purchasing
Make a list of your 15 most important ingredients. Note for each ingredient how many kilos you use per week and what you currently pay. Check with your supplier what the prices are in different seasons.
Plan your 4 menu switches
Choose 4 fixed dates per year to adjust your menu (for example March 1, June 1, September 1, December 1). For each switch, plan 2-3 new dishes with seasonal products and determine which dishes you'll remove.
Calculate your savings
Add up per season how much you save by using cheaper ingredients. Multiply the price difference per kilo by your weekly usage and the number of weeks in that season. This gives you the business case for seasonal planning.
Build in transition periods
Plan 2-3 weeks of overlap between seasons where you have both ingredients in stock. This prevents you from suddenly running out and allows you to gradually switch. Test new dishes during this period as daily specials.
Monitor and adjust
Track each month which seasonal dishes sell well and which don't. Adjust your purchasing based on actual sales. A dish that doesn't sell costs you money regardless of how cheap the ingredients are.
✨ Pro tip
Start by tracking price differences for just 3 ingredients over the next 8 weeks before building your full calendar. You'll spot the biggest savings opportunities without overwhelming your purchasing workflow.
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
How much can I save with seasonal purchasing?
On average 15-25% on your ingredient costs for seasonal products. For a restaurant with €8,000 monthly purchasing, this saves €1,200-2,000 per month, especially in summer and fall months.
How often should I adjust my menu?
At least 4 times per year, with each season change. Many restaurants do this too infrequently and miss out on savings. You can also make small adjustments monthly with daily specials.
What if customers miss their favorite dish?
Keep 70% of your menu fixed and rotate 30% per season. Communicate positively about new ingredients and offer alternatives. Most customers appreciate fresh, seasonal dishes when you frame them right.
Can I freeze seasonal products for later use?
Some can, others can't. Vegetables like peas and beans freeze well, but asparagus and tomatoes lose quality. Calculate whether storage costs offset the price advantages before committing to large purchases.
📚 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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