A restaurant's butternut squash risotto earns 35% margin in September but drops to 12% by January while returns triple. Seasonal dishes create this exact scenario—what starts profitable turns costly as ingredient quality deteriorates and prices spike. Tracking both return rates and margin shifts prevents you from bleeding money on dishes past their prime.
Why seasonal dishes are risky for your margin
Seasonal dishes carry a double risk. First, ingredient quality changes throughout the season. An asparagus soup that's perfect in May can taste bitter in June because asparagus becomes woody. Second, many kitchens keep offering the same dish while costs rise due to scarcity.
⚠️ Watch out:
A return costs you not just the ingredients, but also labor time, a new portion, and often a complimentary dessert as compensation. One return can cost €15-25.
How to measure return percentages per seasonal dish
Start by tracking three numbers per seasonal dish: portions sold, returns, and reason for return. Many kitchens forget to record this, but it provides crucial insight into which dishes are causing problems.
💡 Example tracking October:
Pumpkin soup with roasted pumpkin seeds:
- Sold: 120 portions
- Returns: 3 portions (2.5%)
- Reason: 2x too salty, 1x served cold
Return percentage of 2.5% is acceptable (below 3%).
Also note the reason for each return. Is it taste, temperature, presentation, or portion size? This helps you distinguish between quality issues with the ingredient and execution problems in the kitchen.
Link return data to margin changes
Don't just measure returns—track how your margin shifts throughout the season too. From years of working in professional kitchens, I've seen ingredients double in price while quality plummets, creating a devastating combination for profitability.
💡 Example margin progression:
Asparagus soup April-June:
- April: €4.20 cost, 28% food cost, 0.8% returns
- May: €4.80 cost, 32% food cost, 1.2% returns
- June: €6.20 cost, 41% food cost, 4.1% returns
In June you're losing money on this dish.
Calculate the total impact by factoring in both higher cost of goods and return costs. Total impact = (Higher food cost × portions sold) + (Return percentage × €20 average return cost)
Signals that a seasonal dish should stop
Clear signals exist for determining exactly when a seasonal dish costs more than it earns. Use these thresholds to make objective decisions about discontinuing dishes.
- Food cost above 38%: Too expensive for the selling price
- Return percentage above 4%: Quality no longer acceptable
- Sales drop 30% in 2 weeks: Guests notice the quality decline
- Negative reviews about taste: Reputation damage looming
⚠️ Watch out:
Don't abruptly stop popular seasonal dishes. Communicate to guests that the season has ended and announce a replacement.
Digital tracking vs. manual registration
Manual registration in a notebook works, but takes considerable time during analysis. You'll spend hours adding up and calculating figures weekly. Digital systems can automatically show trends and alert you when return percentages or food cost climb too high.
The advantage of digital tracking? You can quickly compare between seasons. Maybe last year you stopped the asparagus soup too late. This year you'll spot deteriorating numbers immediately.
How do you effectively track seasonal dishes? (step by step)
Set up tracking system per seasonal dish
Create a list of all seasonal dishes and note from day 1: portions sold, number of returns, reason for return, and current purchase price of main ingredients. Update weekly.
Calculate food cost and return percentage weekly
Divide returns by portions sold for return percentage. Calculate food cost with current purchase prices. Put both figures in a graph to see trends.
Set stop thresholds and communicate
Determine in advance at what food cost (e.g., 38%) and return percentage (e.g., 4%) you'll stop offering the dish. Prepare a replacement dish and communicate the switch to guests.
✨ Pro tip
Track your seasonal dish performance over a rolling 14-day window, comparing return rates against ingredient cost fluctuations. This timeframe catches quality decline before it devastates your monthly numbers.
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 is an acceptable return percentage for seasonal dishes?
Below 3% is good, between 3-4% requires attention, above 4% costs you money. Measure weekly, not monthly, since seasonal ingredients deteriorate quickly.
How often should I recalculate food cost for seasonal dishes?
At least weekly, because seasonal ingredients can spike in price rapidly. For critical ingredients like asparagus or oysters, check daily to avoid surprises.
Should I raise the selling price if ingredients become more expensive?
You can try, but guests often resist price increases on seasonal dishes. It's usually better to discontinue when margins drop too low and introduce a replacement dish instead.
How do I prevent stopping a seasonal dish too late?
Set thresholds for food cost and return percentage before the season starts. Automatic alerts help you make objective decisions rather than emotional ones about popular dishes.
⚠️ EU Regulation 1169/2011 — Allergen Information — https://eur-lex.europa.eu/eli/reg/2011/1169/oj
The allergen information on this page is based on EU Regulation 1169/2011. Recipes and ingredients may vary by supplier. Always verify current allergen information with your supplier and communicate this correctly to your guests. KitchenNmbrs is not liable for allergic reactions.
In the UK, the FSA enforces allergen regulations under the Food Information Regulations 2014.
📚 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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