COGS vs Food Cost Percentage: Key Differences Explained
COGS and food cost percentage are not the same metric. Learn the key differences, when to use each, and how both affect restaurant profitability and pricing.
COGS vs Food Cost Percentage: Key Differences Explained
COGS and food cost percentage are related but not the same number — and confusing them is one of the most common accounting mistakes restaurant operators make. Understanding the difference helps you interpret your financials correctly and price your menu accurately.
What Is COGS (Cost of Goods Sold)?
COGS is an accounting term measuring the actual cost of inventory consumed to generate revenue during a specific period:
COGS = Beginning Inventory + Purchases − Ending Inventory
COGS is a dollar figure on your income statement.
Example:
- Beginning inventory: $8,000
- Purchases this month: $22,000
- Ending inventory: $7,500
- COGS = $22,500
What Is Food Cost Percentage?
Food cost percentage is COGS expressed as a proportion of revenue:
Food cost % = COGS ÷ Food Sales × 100
This is the operational metric managers use daily.
Example:
- COGS: $22,500
- Food Sales: $72,000
- Food cost % = 31.25%
Key Differences
| COGS | Food Cost % | |
|---|---|---|
| Format | Dollar amount | Percentage |
| Used for | P&L statements, taxes | Menu pricing, daily ops |
| Includes inventory change | Yes | Yes (when calculated correctly) |
| Benchmarked against | Prior periods, budget | Industry standards (28–32%) |
| Tracked by | Accountants | Operators and chefs |
Why They Can Tell Different Stories
Scenario 1: Sales drop 15%, purchases stay the same.
- COGS: unchanged ($22,500)
- Food cost %: rises from 31% to 37% — a red flag
Scenario 2: You run a big catering event, sales and purchases both jump.
- COGS: rises significantly
- Food cost %: stays at 31% — operations are fine
This is why you need both metrics.
Theoretical vs. Actual Food Cost
Beyond COGS and food cost %, track theoretical food cost — what your food cost should be with perfect execution and zero waste.
Variance = Actual food cost % − Theoretical food cost %
A variance over 2–3% indicates waste, theft, or portion inconsistency.
Which Metric Should You Use?
- For taxes and financial reporting: Use COGS (dollar figure)
- For menu pricing and weekly management: Use food cost percentage
- For identifying operational problems: Track both plus the variance from theoretical
FAQ
Is COGS the same as food cost?
Not exactly. COGS is the accounting term for the income statement. Food cost percentage is the operational metric. Both use the same underlying formula — the difference is format and context.
What's a good COGS for a restaurant?
There's no universal target since COGS is a dollar figure. What matters is that your food cost % (COGS ÷ sales) stays within your target range, typically 28–32%.
How do I calculate food cost percentage without a full inventory?
Use: Purchases ÷ Sales × 100. This doesn't account for inventory changes but gives a quick directional read.
Why is my food cost % different from what my accountant reports?
Your accountant calculates COGS for a specific period using accrual accounting, which may differ from your operational time window. Align on definitions to compare accurately.
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