A seasonal dish that suddenly goes viral can significantly affect your margin. You're suddenly selling 10x more, but do you have enough stock? Are your prices still right? And what if the hype dies down? Here you'll learn how to estimate the impact on your margin and adjust quickly.
Calculate your current margin per portion
Before you can estimate the impact, you need to know what the dish currently brings in. Add up all ingredient costs and calculate the food cost.
💡 Example:
Your pumpkin soup goes viral on TikTok. Current sales: 15 portions/week.
- Ingredient costs: €3.20 per portion
- Selling price: €12.50 incl. 9% VAT = €11.47 excl. VAT
- Food cost: €3.20 / €11.47 = 27.9%
- Margin per portion: €11.47 - €3.20 = €8.27
Current margin: €8.27 × 15 portions = €124 per week
Estimate the new sales numbers
Look at the first days after going viral. How much are you selling per day now? Project this carefully to a week.
- Count orders from the last 3 days
- Calculate: average per day × 7 days
- Account for weekend peaks and weekday dips
- Add a 20-30% buffer for uncertainty
💡 Example viral impact:
After 3 days viral: 45 portions sold (normally 6-7 portions).
- New sales: 45 ÷ 3 = 15 per day
- Per week: 15 × 7 = 105 portions
- With buffer: 105 × 1.25 = 131 portions
From 15 to 131 portions per week = 873% increase
Check your purchase price at larger volumes
More sales means more purchasing. But do you get discounts at larger quantities? Or do you face availability problems?
- Call your supplier: can they deliver?
- Ask about volume discounts at certain quantities
- Check alternative suppliers as backup
- Watch for seasonal price fluctuations
⚠️ Watch out:
With seasonal products, prices can rise quickly if demand increases. Pumpkin gets more expensive if all restaurants suddenly want it.
Calculate the new margin impact
Now you can work out what the viral popularity means for your total margin on this dish.
💡 Margin calculation:
Suppose: ingredient price rises from €3.20 to €3.60 due to higher demand.
- New food cost: €3.60 / €11.47 = 31.4%
- New margin per portion: €11.47 - €3.60 = €7.87
- Total margin per week: €7.87 × 131 portions = €1,031
- Difference from before: €1,031 - €124 = €907 extra per week
Despite higher purchasing costs: €907 extra margin per week
Plan for when the hype is over
Viral trends are temporary. Prepare for the decline and prevent being left with too much inventory.
- Track sales figures weekly
- Adjust your purchasing as soon as sales drop
- Consider a temporary price increase during the peak
- Use the extra margin to improve other dishes
⚠️ Watch out:
Don't buy too much inventory during the peak. Seasonal products spoil quickly and you'll struggle to use them in other dishes.
Monitor your overall menu balance
A viral dish can affect other sales. Guests might order less of your profitable main courses.
- Compare your total revenue per guest (not just this dish)
- Check if guests still order side dishes or drinks
- Watch if popular main courses sell less
- Calculate the impact on your total food cost percentage
How do you calculate the margin impact? (step by step)
Determine your current margin per portion
Add up all ingredient costs and subtract this from your selling price excl. VAT. This is your baseline to compare against.
Estimate new sales numbers
Count sales from the last 3 days, divide by 3, multiply by 7. Add a 25% buffer for uncertainty.
Check purchase prices at higher volumes
Call your supplier for availability and possible discounts. Watch for price increases due to increased market demand.
Calculate new total weekly margin
New margin per portion × estimated sales per week. Compare with your old weekly margin for this dish.
Monitor and adjust
Track sales figures weekly. Adjust purchasing immediately if the trend declines to prevent waste.
✨ Pro tip
Use the extra margin from viral dishes to improve your less popular dishes. Invest in better ingredients or lower their prices to strengthen your entire menu.
Calculate this yourself?
In the KitchenNmbrs app you can do this in just a few clicks. 7 days free, no credit card.
Was this article helpful?
Frequently asked questions
Should I raise my price if a dish goes viral?
That can be smart during the peak. Many guests will order it anyway, and you compensate for higher purchasing costs. Test carefully with a 10-15% increase.
How do I prevent getting stuck in the kitchen with viral dishes?
Prep more in advance and ensure you have enough staff. Consider a daily maximum ('Sold out after 50 portions') to keep the kitchen running smoothly.
What if my supplier can't deliver enough?
Quickly find a second supplier or temporarily adjust the recipe with similar ingredients. Communicate honestly with guests if you're sold out.
How long does a viral trend usually last?
Usually 2-6 weeks, depending on the platform and season. TikTok trends are often shorter than Instagram trends. Monitor weekly and adjust quickly.
Does one viral dish affect my total food cost?
Yes, if it becomes a large part of your sales. If 40% of your guests order the same thing, that dish largely determines your total food cost percentage.
📚 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.
Purchase smarter with real-time insights
Seasonal prices fluctuate — so do your recipe costs. KitchenNmbrs automatically recalculates your margins when purchase prices change. Never get surprised again. Start free.
Start free trial →