Ever wonder how Restaurants keep their budgets from boiling over? The short answer: the 30 30 30 rule — spend 30% on food, 30% on labour, 30% on overheads. It’s the simple formula behind profitable Restaurants. Curious how it works (and why it matters)? Keep reading for the tasty breakdown.

What is the 30/30/30 Rule? (And Why It’s Really the 30/30/30/10 Benchmark)

Effective restaurant management relies on clear financial guidelines.
The 30/30/30 rule offers a simple way to split revenue across core costs, helping owners maintain balance and steady profitability. 

Pie chart showing restaurant cost breakdown.

The Four Components: COGS, Labour, Overhead, and Profit

Defining COGS (Cost of Goods Sold)

Food costs include ingredients, inventory, and any waste that occurs.
Menu engineering and structured inventory control help keep this category in line.

Defining Labour Costs (Wages, Salaries, and Benefits)

Labour covers wages, benefits, payroll taxes, and training.
Managing staff efficiently helps maintain a healthy labour percentage.

Defining Overhead (Rent, Utilities, Insurance, Marketing)

Overhead expenses include rent, utilities, licences, insurance, and marketing efforts.
Keeping these within target percentages supports long-term stability.

Why the Rule Is the Go-To Diagnostic Benchmark

Simplicity for Budgeting and Menu Pricing

The rule offers an easy benchmark for budgeting and pricing.
It shows how much room remains for profit once the essentials are covered.

Identifying Financial Leaks (The Danger of a Ratio Exceeding 30%)

If a category climbs above 30%, it may signal deeper issues.
Monitoring these ratios helps identify problems early.

Deconstructing the “Big Three” Operating Costs

The rule divides spending into three core categories.
Understanding each one helps owners make better decisions and protect margins.

The First 30%: Food and Beverage Costs (COGS)

Cost Control Strategies (Inventory Management and Recipe Costing)

Tight inventory management and accurate recipe costing reduce waste.
Menu design also plays a major role in controlling food costs.

Factors that Push COGS Higher (Waste, Theft, and Over-Portioning)

Over-portioning, spoilage, and theft quickly inflate COGS.
Consistent monitoring protects profitability.

The Second 30%: Labour Costs and Wage Management

Calculating Labour Cost Percentage (The Formula)

Labour Cost % = (Total Labour Costs ÷ Total Sales) × 100.
This gives a clear view of whether staffing aligns with demand.

Measuring Staff Efficiency (Sales Per Labour Hour)

Sales per labour hour helps measure staff productivity.
It’s a useful tool for improving schedules and managing labour spend.

The Third 30%: Overhead and Fixed Operating Expenses

Occupancy Costs (The Fixed Expense of Rent/Mortgage)

Rent is one of the largest fixed expenses.
Keeping it predictable helps maintain a balanced financial structure.

Accounting for Miscellaneous Expenses (Maintenance and Licensing)

Maintenance, cleaning, and licensing fees fall into overhead.
Budgeting for these ensures smoother operations across the year.

The Critical 10% and When to Break the Rules

The remaining 10% represents net profit.
While the rule is a strong benchmark, it doesn’t apply equally to every concept or location.

The Crucial 10%: Maximising Net Profit Margin

The Prime Cost Relationship (COGS + Labour = Prime Cost)

Prime cost combines the two biggest expense categories.
Keeping it under control is essential for healthy margins.

Why a 10% Profit is Considered Healthy in the Industry

A 10% net profit margin is widely accepted as strong.
It offers space for reinvestment and flexibility in challenging periods.

When the 30/30/30 Rule Doesn’t Apply

Model Exceptions: Higher Labour / Lower COGS (Fine Dining)

Fine dining often carries higher labour costs due to service expectations.
However, elevated menu prices help balance the equation.

Model Exceptions: Higher Overhead / Lower Labour (Fast Casual / Takeaway)

Fast casual models can have higher overheads but lower labour costs.
Technology and simplified service formats shift the balance.

Geographic Impact (High-Rent City vs. Low-Cost Rural Location)

High-rent cities force overhead above 30%, while rural areas allow more flexibility.
Location remains one of the strongest influences on these ratios.