If you could only track one financial metric in your restaurant, prime cost would be it. It tells you more about your restaurant’s health than any other single number — and most operators either calculate it wrong or check it too infrequently to act on it.
What is Prime Cost?
Prime cost is the sum of your Cost of Goods Sold (COGS) and your Total Labor Costs, expressed as a percentage of total sales.
Prime Cost = (Food Cost + Beverage Cost + Total Labor Cost) ÷ Total Sales × 100Example:
- Total Sales: $80,000
- Food & Beverage Cost: $22,400
- Total Labor (wages + payroll taxes + benefits): $30,400
- Prime Cost: ($22,400 + $30,400) ÷ $80,000 = 66.0%
Prime cost captures the two largest, most controllable cost categories in your restaurant — which is why it’s so powerful.
What’s a Good Prime Cost?
| Restaurant Type | Target Prime Cost |
|---|---|
| Fine Dining | 60–65% |
| Casual Dining | 55–60% |
| Fast Casual | 50–58% |
| Quick Service | 45–55% |
| Bar (beverage focus) | 50–60% |
If your prime cost is above 68–70%, it is extremely difficult to be profitable regardless of how tightly you manage your other expenses.
Why Calculating Prime Cost Weekly (Not Monthly) Is Critical
Most operators calculate prime cost monthly when they close their books. By then, if food cost ran high for two weeks due to a vendor pricing change you didn’t notice, that margin is already gone. You can’t recover it.
Checking prime cost weekly gives you an actionable signal in time to respond. If your prime cost jumps from 62% to 69% in one week, you can pull your inventory and identify what was ordered vs. used, check for a spoilage or waste event, review a labor schedule that may have been over-staffed, and talk to your kitchen manager before the problem compounds.
The 3 Most Common Reasons Prime Cost is Too High
1. Food cost is running hot. Usually caused by over-portioning, waste/spoilage, theft, menu pricing that’s too low, or COGS that have risen without a corresponding price adjustment.
2. Labor scheduling is too generous. When guest counts drop but labor hours stay the same, labor cost % spikes. Use your POS data to schedule to projected sales, not to last week’s schedule.
3. You’re not tracking it at all. The most common cause. You can’t manage what you don’t measure.
How FinAcct360™ Tracks Prime Cost Automatically
FinAcct360™ calculates your actual prime cost every week by pulling your sales data directly from your POS and reconciling it against your purchase orders and labor records. Every Monday, your dashboard shows this week’s actual prime cost %, prior week comparison, 4-week rolling average, and variance from your target.
You see the number. You know if it’s a problem. You have time to do something about it.