78% of restaurants ignore their own sales data when creating seasonal menus. They build summer or winter menus on gut feeling while their POS system holds the exact answers about which dishes performed well. Smart analysis of previous seasons stops you from repeating costly mistakes.
Why seasonal data matters so much
Your POS system tracks everything: which dishes moved, which sat there gathering dust, what guests actually paid. This hard data beats guesswork every single time.
💡 Example:
Restaurant The Four Seasons reviewed summer 2023:
- Carpaccio: 340 sold, food cost 28%
- Gazpacho: 89 sold, food cost 35%
- Grilled dorade: 156 sold, food cost 31%
- Summer salad: 267 sold, food cost 22%
Result: Drop gazpacho, double down on carpaccio and summer salad
Which numbers actually matter
Don't drown in data. Focus on these four metrics from last season:
- Units sold per dish - what guests wanted
- Food cost percentage - what made you money
- Average check monthly - what guests paid
- Peak and slow weeks - timing patterns
⚠️ Watch out:
Popularity alone means nothing. A dish selling 500 portions at 45% food cost bleeds money with every order.
The four-box analysis
Sort your seasonal dishes into four categories based on sales volume and profit margins:
- Stars: High sales + high profit (feature prominently)
- Workhorses: High sales + low profit (increase price or tweak recipe)
- Puzzles: Low sales + high profit (improve marketing or presentation)
- Dogs: Low sales + low profit (eliminate immediately)
💡 Winter menu breakdown:
Bistro The Warm House analyzed winter 2023:
- Star: Beef stew (289x sold, 29% food cost)
- Workhorse: Beef tenderloin (178x sold, 42% food cost)
- Puzzle: Wild ragout (67x sold, 26% food cost)
- Dog: Pheasant fillet (23x sold, 38% food cost)
Action plan: Axe pheasant, bump tenderloin price €3, spotlight wild ragout
Track ingredient price shifts
Seasonal ingredients swing wildly in cost. That €12/kg ingredient from last March? Could be €18 now. Check current prices before locking in your menu.
- Compare last year's purchase prices with today's quotes
- Recalculate food cost percentages
- Adjust menu prices accordingly
- Source alternatives for expensive items
I've seen restaurants lose €200-400 monthly because they forgot to update their costing after ingredient prices jumped. It's a mistake that costs the average restaurant significant profit over a full season.
Perfect your seasonal timing
Your data reveals exactly when demand shifts. Use this intel to nail your timing next year.
💡 Timing insights:
Café The Bridge discovered:
- Soup sales crash after week 12 (late March)
- Salad orders climb from week 14 (early April)
- Terrace dishes explode from week 16
New strategy: Launch spring menu week 14, not week 18
Study inventory and waste patterns
Seasonal data shows you how much to actually order. Overoptimism about new dishes creates expensive waste.
- Weekly sales volume per dish
- Which ingredients expired unused
- Where your projections missed the mark
- Start smaller this time around
⚠️ Smart approach:
Analysis tools that work
Most POS systems generate period reports - just ask your provider for help if you're stuck. Food cost calculators can compare last year's costs with current supplier prices, showing you exactly which dishes got more expensive.
How do you analyze seasonal data? (step by step)
Export sales figures from last season
Pull the sales figures per dish from your POS system from the same season last year. Request at minimum number sold, revenue per dish and a 3-month period.
Calculate food cost then vs now
Compare ingredient prices from last year with now. Calculate the new food cost percentage for each dish with current purchase prices.
Do the four quadrants analysis
Divide dishes into popular/not popular and profitable/not profitable. Keep stars, adjust workhorses, promote puzzles and remove losers.
Plan purchasing and inventory
Use last year as a basis for your orders, but start 20% lower for new dishes. You can always reorder if things go well.
✨ Pro tip
Pull last summer's sales data 8 weeks before your spring menu launch. Compare your top 12 dishes from June-August with current ingredient costs to spot profit opportunities early.
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
What if I don't have data from last season?
Start tracking everything now with small portions. After this season you'll have solid data for next year. Also network with other restaurant owners about their seasonal experiences.
How many dishes should I swap out each season?
Replace maximum 30-40% of your menu. Guests crave some novelty but need familiar favorites too. Too many changes overwhelm both staff and customers.
Should I eliminate every losing dish?
Not necessarily. Some low-sellers serve important purposes - vegetarian options, allergy accommodations. Target the big losers that actually drain profits.
How do I prevent repeating the same seasonal mistakes?
Document why you're adding each new dish and set clear expectations. Review performance after 4 weeks and make quick adjustments if needed.
📚 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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