A restaurant that grosses $1.2 million and nets $120,000 is running textbook margins. A restaurant that grosses $1.2 million and nets $8,000 is one bad month away from closing. The difference between the two is almost always the same thing: one operator runs their P&L against the 30-30-30 rule, and the other doesn't.
The 30-30-30 rule is not a law of physics. It's a diagnostic framework that tells you, in 30 seconds, whether your restaurant is healthy or bleeding. I've used it with dozens of operators, and it surfaces problems that more complicated financial models miss.
What is the 30 30 30 Rule in Restaurants?
The 30-30-30 rule states that a well-run independent restaurant should allocate roughly:
| Cost Category | Target | What It Covers |
|---|---|---|
| Food Cost | 30% of revenue | Ingredients, beverages, garnishes, takeout packaging |
| Labor Cost | 30% of revenue | Hourly wages, payroll taxes, workers' comp, benefits |
| Prime Operating Expenses | 30% of revenue | Rent, utilities, insurance, repairs, marketing, POS subscriptions |
| Net Profit | 10% of revenue | What the owner actually takes home |
That 10% at the bottom is the entire game. If your rent is 12% instead of 8%, you don't have a rent problem. You have a 2% net profit problem, which means you need to find that 2% somewhere else — lower food cost, tighter labor scheduling, or more volume.
Industry Data & Sources:
According to The Restaurant Times, the average profit margin for a full-service restaurant is between 3% and 5%, meaning most operators miss the 10% target by a wide margin.
The National Restaurant Association reports that food and labor costs together consume 60-70% of revenue at the typical independent restaurant, matching the 30-30 framework at the upper end.
Where the rule came from
The 30-30-30 rule originated in mid-scale casual dining chains during the 1990s as a simplified P&L benchmark. Chains like Darden and Brinker built their unit economics around it. Independent operators adopted it because it's simple enough to calculate on the back of a napkin and brutal enough to expose real problems.
The name comes from the three equal slices: three 30% buckets, one 10% remainder. If any bucket exceeds 30%, another bucket has to shrink, or profit disappears.
The Food Cost Bucket: 30%
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Food cost is the bucket you can change the fastest. You can't renegotiate a lease by tomorrow, but you can switch purveyors, shrink portions, or kill a Dog dish before next service.
What healthy 30% food cost looks like
| Metric | Target | Red Flag |
|---|---|---|
| Overall food cost % | 28–32% | Above 35% |
| Protein cost as % of plate | ≤ 40% of menu price | Above 50% |
| Waste % (pre-consumer) | ≤ 2% of purchases | Above 5% |
| Vendor price variance (QoQ) | ≤ 3% increase | Above 8% |
If your food cost is 37%, you're over-serving, over-paying, or wasting. Usually all three.
The fastest food cost fixes
Kill your bottom 10% of menu items. In a menu engineering analysis, the bottom decile of items almost always includes dishes that lose money on every plate. Removing them raises your blended margin immediately.
Audit your top 3 proteins. Chicken, beef, and seafood typically account for 60% of food cost. If your chicken breast supplier went from $2.79/lb to $3.29/lb and you didn't notice, you're leaking 0.5% margin right there.
Run the numbers before you change anything. Our food cost calculator gives you the exact percentage per dish so you know which items to fix, not guess.
Remember: going from 35% to 30% food cost on $800,000 in annual revenue puts $40,000 back in your pocket. That's not accounting theory. That's a second location's worth of capital.
The Labor Cost Bucket: 30%
Labor is the hardest bucket to control because you can't automate hospitality. But most operators I've worked with are scheduling against instinct, not data.
What healthy 30% labor cost looks like
| Metric | Target | Red Flag |
|---|---|---|
| Total labor % (including payroll tax) | 28–32% | Above 35% |
| FOH labor % | 12–15% | Above 18% |
| BOH labor % | 13–16% | Above 18% |
| Overtime % of total hours | ≤ 3% | Above 6% |
| Sales per labor hour (SPLH) | $55–75 | Below $45 |
The difference between 36% and 30% labor
A restaurant doing $85,000/month in sales running 36% labor pays $30,600 in wages. At 30%, that's $25,500. The $5,100 monthly difference is $61,200 per year. That's a manager's salary or a down payment on a second location.
How operators actually hit 30%
Cut shifts from the edges, not the middle. Most overstaffing happens during the first 45 minutes of service and the last 60. Trim one server during opening and one during closing. That's 14 hours per week at $18/hour = $13,104 per year saved, with zero guest impact.
Cross-train hosts as bussers. During slow periods, a host can clear and reset tables. This eliminates 8–12 hours of dedicated busser shifts per week.
Use the break-even calculator to model exactly how many covers you need at your current labor rate to hit profitability. Most operators discover they need 6 fewer covers per shift than they thought.
The one labor rule you can't break: sales per labor hour must stay above $50. Below $50 SPLH, you're paying people to stand around. Track it weekly, post it in the kitchen, and make it the first number you look at every Monday morning.
The Prime Operating Expenses Bucket: 30%
This is the bucket operators treat as fixed but shouldn't. Rent, utilities, insurance, repairs, marketing, credit card processing, POS subscriptions, trash, linens, pest control — the list gets long fast.
What healthy 30% prime cost looks like
| Expense | Target % of Revenue |
|---|---|
| Rent (including NNN) | 6–8% |
| Utilities | 2–3% |
| Insurance | 1–2% |
| Repairs & maintenance | 1–2% |
| Marketing | 2–3% |
| Technology (POS, online ordering) | 1–2% |
| Everything else | 5–8% |
The rent trap
The single biggest mistake I see: operators signing a lease at 10% of projected revenue, then actual revenue comes in 20% below projection. Now rent is 12.5% of real revenue. The math never recovers.
Rule of thumb: negotiate rent so it doesn't exceed 7% of conservative revenue projections. If your landlord says the space should do $1M, model it at $800K. If rent is still under 7% at $800K, sign. If not, walk.
The technology line item
Restaurant tech spending has doubled in 5 years. POS subscriptions, online ordering platforms, reservation systems, inventory software, scheduling apps — each charges $50–$300/month. Six subscriptions at $200/month is $14,400 annually. That's 1.4% of $1M in revenue.
Audit your tech stack. If you have Square for POS ($69/mo), 7shifts for scheduling ($40/mo), MarketMan for inventory ($200/mo), and OpenTable for reservations ($249/mo), you're at $558/month before you've even considered delivery platform commissions. Technology should solve problems, not create a new expense bucket.
The 10% Profit Margin: Why Most Operators Miss It
According to industry data, the average independent restaurant nets between 3% and 6%. Most operators I talk to think 10% is aspirational. It's not. It's what the numbers produce when you hit the three 30% targets.
| Revenue | 6% Net (average) | 10% Net (target) | Gap |
|---|---|---|---|
| $500,000 | $30,000 | $50,000 | $20,000 |
| $1,000,000 | $60,000 | $100,000 | $40,000 |
| $1,500,000 | $90,000 | $150,000 | $60,000 |
That gap isn't a pricing problem. It's an operations problem. Every operator running 6% margin has a 30-30-30 violation somewhere in their P&L. Find it and fix it.
How to Run Your Own 30-30-30 Audit
Take your last 3 months of P&L statements. For each month, calculate:
- Food cost % = (Beginning inventory + Purchases - Ending inventory) ÷ Total sales × 100
- Labor cost % = (Gross wages + Payroll taxes + Benefits) ÷ Total sales × 100
- Occupancy % = (Rent + Utilities + Insurance + Repairs + Tech subscriptions) ÷ Total sales × 100
If any bucket exceeds 30%, circle it. That's your priority.
Then run these numbers through the break-even calculator to see exactly how much volume or margin improvement you need to land at 10% net profit. Most operators find the gap is smaller than they think — and the fix is simpler than they expect.
The 30-30-30 rule isn't about hitting a perfect number. It's about knowing which bucket is leaking, and by how much. That knowledge alone puts you ahead of 80% of independent restaurant owners.
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