How to Calculate Your Business Overhead Rate

Your overhead rate tells you how much indirect cost you’re carrying for every dollar of direct cost, and it’s the number that lets you fold overhead into pricing accurately instead of guessing. Without it, you can appear profitable on paper while your business hemorrhages money covering rent, insurance, salaries, and utilities.

The formula

Overhead rate = Total overhead costs ÷ Total direct costs (or another allocation base, like direct labor hours), typically expressed as a percentage. An overhead rate of 40% means for every dollar of direct cost, you’re carrying 40 cents of overhead.

The most straightforward version is:

Overhead Rate = Total Overhead Costs ÷ Total Revenue × 100

Example: A graphic design studio with $24,000 in monthly overhead (salaries, rent, software licenses, utilities) and $100,000 in monthly revenue has a 24% overhead rate.

Choosing an allocation base

Different business types load overhead differently. Choose the allocation base that best reflects how your business actually consumes resources:

• Direct labor hours – common for service businesses like consulting, contracting, or agencies where labor is the main direct cost. A plumbing company might allocate overhead per labor hour.
• Direct material cost – common for product businesses like manufacturing or e-commerce where materials represent a large portion of the cost of goods sold.
• Machine hours – in production-heavy operations where equipment utilization drives efficiency.
• Revenue – the simplest method, useful for quick benchmarking across your industry.

Why this matters for pricing

A price that only covers direct cost plus a margin target, without folding in overhead, looks profitable per sale while the business as a whole struggles to cover its indirect costs. The overhead rate is what closes that gap in your pricing math.

Real scenario: A contract manufacturer wins an order with $5,000 in direct material and labor costs. They add a 25% margin and quote $6,250. The sale looks good until you realize their overhead rate is 50% of revenue—meaning they need to add $3,125 in overhead allocation to that job just to break even. The actual profitable price should be closer to $9,375.

Two calculation methods with real numbers

Method 1: Overhead as a percentage of revenue

This is the simplest version and works well for pricing and quick health checks.

Formula: Total Overhead Costs ÷ Total Revenue

Example: An accounting practice has $36,000 in monthly overhead (two salaries, office lease, software, insurance) and generates $150,000 in monthly revenue. Overhead rate = $36,000 ÷ $150,000 = 24%.

Method 2: Overhead absorption rate per labor hour

More precise for service businesses; lets you embed overhead directly into hourly rates.

Formula: Total Overhead ÷ Total Direct Labor Hours

Example: The same accounting practice has $36,000 in monthly overhead and 800 billable hours available that month. Overhead per labor hour = $36,000 ÷ 800 = $45/hour. If a junior accountant’s fully-loaded labor cost (salary + taxes + benefits) is $35/hour, the real cost to deliver that labor is $35 + $45 = $80/hour. A $120/hour billing rate only yields $40/hour margin—tighter than it appears.

Where your rate should probably land

Industry benchmarks vary significantly. If your overhead rate is outside these ranges, it’s worth investigating why:

• Service businesses (consulting, plumbing, HVAC): 10–20%
• Retail: 20–30%
• Manufacturing: 25–35%
• Professional services/agencies (law, design, accounting): 50–70%
• SaaS/software: 5–15%

As a general ceiling, an overhead rate above roughly 35% of revenue outside of professional services is usually worth a closer look—it often signals inefficiency, over-staffing, or poor utilization.

Common mistakes to avoid

• Excluding the owner’s salary or draw. If you’re not paying yourself a W-2 or consistent draw, the overhead calculation understates the true rate and makes the business look more efficient than it is. Include your own compensation as an overhead cost.
• Calculating once a year instead of monthly. Seasonal businesses see overhead rates swing wildly month to month. A retail business might run 18% overhead in December but 45% in February. Monthly tracking shows you when pricing needs adjustment and prevents cash surprises.
• Forgetting to include all indirect costs. Utilities, insurance, licenses, depreciation, accounting fees, marketing, administrative salaries, and office supplies all belong in overhead. A forgotten category can hide 5–10 percentage points of real cost.
• Comparing to generic benchmarks instead of your industry. A 60% overhead rate is reasonable for a legal firm and catastrophic for a manufacturer. Know your peer group.

Next steps

Calculate your overhead rate monthly for the last three months. If you see a trend upward, audit discretionary spending. If it’s above your industry benchmark, map which cost categories are driving the difference. A clear overhead picture is the foundation for both better pricing and smarter cost management.