Myth vs Reality: Dish costing in restaurants
The myth says that prime cost and 35% food cost have you covered. The reality is that food cost per dish must be 32% maximum, payroll is a fixed expense—not a dish cost—and prime cost is a P&L ratio, not a recipe costing tool.
I've reviewed the finances of more than 8,400 restaurants. In 78% of cases, the problem wasn't sales—it was costing. Owners convinced they're profitable while quietly draining their working capital.
Three costing myths dominate the industry. All three have the same outcome: margin evaporates and nobody knows where it went. I'm going to dismantle them with numbers.
| The myth | The reality (Masterestaurant) | |
|---|---|---|
| ✕Prime cost covers all my costing needs | ✓Prime cost is a P&L ratio. It tells you nothing about the cost of any specific dish | |
| ✕Payroll belongs in dish cost | ✓Payroll, rent and utilities are fixed expenses. They belong in break-even analysis, not in the recipe | |
| ✕35% food cost means I'm doing fine | ✓The ceiling is 32%. Every percentage point above that costs you thousands per month | |
| ✕If the dish sells well, costing doesn't matter | ✓Revenue without margin is unpaid labor. Volume amplifies the problem, it doesn't fix it | |
| ✕The chef knows what every dish costs | ✓Without a standardized, costed recipe, nobody knows anything. Intuition is not costing | |
| ✕The ideal food cost percentage is the same for every dish | ✓Some dishes run 20%, others 32%. What matters is contribution margin, not any one percentage in isolation |
Analysis: myth (A) vs Masterestaurant reality (B)
What the myth makes you believeMyth
- That monitoring prime cost is enough to know if you're profitable
- That including payroll in dish cost gives a 'more accurate' picture of the business
- That a 35% food cost is acceptable because 'everyone runs it that way'
- That if a dish rotates well, margin takes care of itself
- That the chef carries the costs in their head and that's sufficient
The reality according to the MR methodMasterestaurant
- Prime cost measures overall P&L efficiency. It does not replace dish-by-dish costing with a standardized recipe
- Payroll is a fixed cost recovered through break-even analysis. Embedding it in the dish inflates price and distorts menu reading
- Maximum acceptable food cost per dish is 32%. Above that, every dish sold destroys margin
- Contribution margin = selling price − food cost. If food cost is high, selling more only magnifies the loss
- Without a standardized recipe with exact weights, yield factors and current supplier prices, you don't have costing—you have guesses
Why believing the myth is expensive
The difference between prime cost and dish-level food cost isn't semantic—it's structural. Prime cost tells you if the business works as a whole. Food cost per dish tells you whether each menu item is helping or hurting you.
Embedding payroll in the dish cost is the most expensive mistake I see from owners coming from other industries. They do it with good intentions: they want to 'cover all costs' in the price. The result is either an inflated price that drives away customers, or a margin that looks solid but masks operational inefficiency.
The numbers that debunk the myth
“I had a prime cost of 58% and thought I was 'within range.' When we costed dish by dish with the MR method, we discovered that three of my five star dishes had food costs above 38%. Within two months we dropped average food cost to 29% without raising prices.”
How to leave the myth behind, this week
And with AI?
Project your food cost, spot margin leaks and simulate pricing scenarios in minutes. Diego F. Parra is an expert in AI applied to restaurants.
Free tools to apply this now
Do it with Masterestaurant tools
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Diego F. Parra — International consultant, expert in creating and scaling restaurants and in AI applied to restaurants, foodtech and HORECA. Methodology applied in 8.400+ restaurants across 43 countries · Expert in Artificial Intelligence applied to restaurants, hospitality and food businesses · 20+ years in restaurants, catering, large events and business growth · Author of the book «From Slave to Owner» (Amazon) · International keynote speaker for the HORECA sector.
Frequently asked questions about dish costing
Does prime cost replace dish-level costing?
Why doesn't payroll belong in dish cost?
How does AI help me keep food cost current?
What if my food cost has been at 35% for years and the restaurant 'works'?
Related content
Stop operating on myths. Start costing with method.
At Masterestaurant I teach the costing system I've applied to more than 8,400 restaurants in 43 countries. Not theory—tools you use this week.