Your chef creates today's menu based on what looked fresh at the market, but you have no idea if those dishes will actually make money. Many restaurants with changing menus lose control of their profitability because they lack systems to track daily dish costs. Here's how to calculate margins structurally, even when your menu shifts every single day.
Why daily changing menus complicate margin calculation
Fixed menus let you calculate cost price once and forget about it. But daily changing menus mean your ingredients, suppliers and seasonal prices shift constantly. So you often don't know what you actually earn per dish.
⚠️ Watch out:
Many restaurants with changing menus estimate their margin instead of calculating it. This leads to unprofitable dishes without you realizing it.
The basics: food cost calculation for changing menus
Even with a daily changing menu the basic formula stays the same:
Food cost % = (Ingredient costs / Selling price excl. VAT) × 100
The difference? You need to recalculate this daily for each new dish. That's why you need a system that calculates cost prices quickly and accurately.
💡 Example:
Monday: Sea bass with seasonal vegetables for €28.00 (incl. 9% VAT)
- Sea bass fillet: €8.50
- Seasonal vegetables: €3.20
- Sauce and garnish: €1.80
Selling price excl. VAT: €28.00 / 1.09 = €25.69
Food cost: (€13.50 / €25.69) × 100 = 52.5%
This is way too high! Aim for maximum 35%.
System for daily margin control
For a daily changing menu you need a structured system to quickly calculate cost prices:
- Ingredient database: Maintain a list of all ingredients you regularly use with current purchase prices per kilogram or liter
- Portion sizes: Standardize how many grams/ml you use per person
- Daily check: Calculate the cost price for each new dish before you set the selling price
- Margin floor: Set a minimum margin that each dish must achieve
Pricing strategy for changing ingredients
With daily changing menus you can use two strategies:
Strategy 1: Fixed margins
You maintain a fixed food cost percentage (say 30%) and adjust your selling price based on ingredient costs.
Strategy 2: Flexible margins within a range
You accept that some dishes have 28% food cost and others 35%, as long as the average hovers around 32%. This is a pattern we see repeatedly in restaurant financials - successful operators focus on weekly averages rather than daily perfection.
💡 Example strategy 1:
Ingredient costs today: €11.20 per portion
Desired food cost: 30%
Minimum selling price: €11.20 / 0.30 = €37.33 excl. VAT
Menu price: €37.33 × 1.09 = €40.69 (round to €40.50)
Seasonal price adjustments
With daily changing menus seasons play a huge role in your margins. So calculate your average food cost per season regularly:
- Spring: Asparagus expensive, first vegetables cheaper
- Summer: Lots of local vegetables, fish often pricier due to holiday period
- Fall: Game season, mushrooms, pumpkins
- Winter: Imported vegetables pricier, storage vegetables cheaper
💡 Example seasonal difference:
Asparagus in May: €12/kg → €3.00 per portion (250g)
Zucchini in August: €2/kg → €0.50 per portion (250g)
Difference in food cost for the same type of dish: €2.50 per portion
Tools that help with daily margin calculation
For daily changing menus manual calculations eat up too much time. You need tools that quickly calculate cost prices:
- Spreadsheet: Works, but takes lots of time for data entry
- Hospitality app: Faster, with ingredient database and automatic calculations
- Recipe book with prices: Analog but error-prone
A food cost calculator (like KitchenNmbrs) helps by maintaining an ingredient database where you can quickly assemble new dishes and immediately see the cost price. This saves 15-30 minutes of calculation time daily.
Weekly check of your average margin
Even with changing menus you can spot patterns. Check weekly:
- Average food cost: Does this stay within your target percentage?
- Most popular dishes: Which are profitable, which aren't?
- Seasonal effects: Which ingredients make your menu expensive?
- Price adjustments: Do you need to adjust selling prices?
⚠️ Watch out:
A daily changing menu doesn't mean your margins can fluctuate without control. Track your average food cost weekly.
How do you calculate margin on a daily changing menu? (step by step)
Build an ingredient database
Create a list of all ingredients you regularly use with current purchase prices per kilogram or liter. Update these prices weekly or when you receive new deliveries.
Determine standard portion sizes
Set how many grams of meat, fish or vegetables you use per person. This makes cost price calculation consistent, even with changing dishes.
Calculate daily cost price per dish
Add up all ingredient costs for one portion. Divide this by your selling price (excl. VAT) and multiply by 100 for your food cost percentage.
Set selling price based on desired margin
If your food cost is too high, adjust your selling price. Minimum selling price = ingredient costs divided by desired food cost percentage.
Check your average margin weekly
Calculate your average food cost at the end of the week across all dishes. This gives you insight into your overall profitability.
✨ Pro tip
Calculate your 5 most expensive seasonal ingredients every Tuesday morning before setting the week's direction. This prevents you from unknowingly losing money on premium products that spike in price.
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
Can't I just use a fixed markup on daily changing menus?
A fixed markup (say 3x the purchase price) only works if your ingredients have comparable prices. With changing seasonal products this leads to dishes that are either too expensive or too cheap.
How often should I update my ingredient prices?
Update your ingredient prices at least weekly, or immediately when there are major price changes from suppliers. Seasonal products can vary in price daily.
What if my food cost is 25% one day and 40% another day?
That's normal with daily changing menus. What matters is that your weekly average stays within your target percentage. Compensate expensive days with cheaper dishes.
Do I need to adjust my menu price every day based on ingredient costs?
Not necessarily. You can choose flexible margins within a range (28-35% food cost) or fixed prices with varying margins, as long as the average is correct.
📚 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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