How Much Does Workers Comp Insurance Cost for Small Businesses?

Workers comp insurance cost is calculated on a formula: payroll multiplied by a class code rate, then adjusted by your experience modification factor (EMR). A $1 million roofing payroll pays far more than a $1 million office payroll because the class codes are different. Understanding how the formula works helps you anticipate costs and find legitimate ways to reduce them.

Quick Answer

Workers comp annual premium estimates by industry (per $100 of payroll):

Industry	Typical Rate Range per $100 Payroll
Clerical / office staff	$0.10 to $0.40
Retail	$0.50 to $1.50
Landscaping	$3.00 to $8.00
Plumbing / HVAC	$4.00 to $9.00
Electrical (commercial)	$3.00 to $7.00
Roofing	$10.00 to $25.00+
General contracting	$5.00 to $15.00
Restaurant / food service	$2.00 to $5.00

A small landscaping company with $200,000 in payroll and a $5.00 rate pays approximately $10,000 per year before the EMR adjustment. A $200,000 payroll office business at $0.25 per $100 pays approximately $500 per year.

How Workers Comp Premium Is Calculated

Step 1: Classify your payroll by class code

Every type of work has a NCCI class code (or state-specific equivalent). Roofing work is code 5551. Electrical is 5190. Clerical staff are 8810. Each class code has a published base rate.

Step 2: Apply the base rate

Premium = (Payroll / 100) x Rate

A roofer with $300,000 in payroll at a $15.00 rate: $300,000 / 100 = 3,000 units x $15.00 = $45,000 base premium

Step 3: Apply the Experience Modification Rate (EMR)

The EMR compares your actual claims history to the expected claims for your industry. An EMR of 1.0 is average. Below 1.0 means fewer claims than expected (lower premium). Above 1.0 means more claims than expected (higher premium).

$45,000 x 0.85 EMR = $38,250 modified premium $45,000 x 1.25 EMR = $56,250 modified premium

Step 4: Add state assessments and fees

States add various assessments to the final premium. These are a small percentage of the total and vary by state.

What Drives Workers Comp Cost

The work itself: physical, high-hazard work has higher rates. Office work has low rates. The separation between rates reflects actual injury frequency and severity by occupation.

Your payroll: more payroll means more premium. Seasonal businesses can report actual vs. estimated payroll at audit and receive a refund or owe additional premium.

Your claims history: your EMR reflects 3 years of claims data (excluding the most recent year). Frequent small claims can drive up your EMR more than a single large claim in some formulas.

State: workers comp rates are state-specific and can vary significantly for the same class code. California and New York rates are higher than most states for construction trades.

Experience modification calculation: new businesses start at EMR 1.0 and build history over time. Businesses become eligible for EMR calculation after enough premium volume.

Ways to Reduce Workers Comp Cost

Safety programs: documented safety programs with training records demonstrate to insurers that you are managing risk actively. Some carriers offer premium credits.

Return-to-work programs: programs that allow injured workers to return to light-duty work reduce total claim costs and improve your EMR over time.

Accurate payroll classification: ensure clerical and administrative employees are not classified under field operation codes. Classification errors that overstate physical work payroll increase premiums unnecessarily.

Annual audit: workers comp policies are audited annually. If your actual payroll was lower than estimated, you receive a refund. Track payroll records carefully.

Shop at renewal: workers comp markets vary by carrier. Independent agents who work with multiple carriers can find better pricing at renewal, particularly if your claims history has improved.

Frequently Asked Questions

Is workers comp required for small businesses?

In most states, workers comp is required as soon as you have at least one employee. Some states have thresholds of 3 or 5 employees. Texas is the only state where it is not mandatory for private employers, though non-subscription carries its own significant risks. Sole proprietors with no employees are typically exempt but can voluntarily purchase coverage.

How is workers comp different from GL?

GL covers claims from third parties: clients, customers, and visitors who are injured or suffer property damage because of your business operations. Workers comp covers your own employees when they are injured on the job. You need both: they cover entirely different categories of claims.

Can a sole proprietor get workers comp?

Yes. Sole proprietors and single-member LLCs can purchase workers comp voluntarily in most states. This is relevant if you work on job sites that require proof of coverage, or if you want protection for your own work injuries.

What happens if I do not carry workers comp and an employee is injured?

You are personally liable for all medical costs and lost wages. State agencies can fine you and assess back premiums. In many states, operating without required workers comp is a criminal offense. The injured employee can also sue you directly outside of the workers comp system in some states.

How do I reduce my experience modification rate?

File fewer claims - or no claims - over time. Implement safety programs that prevent injuries before they happen. Return injured workers to light-duty work quickly to reduce total claim costs. Contest any claims that are fraudulent or exaggerated. EMR improvement takes 3 to 4 years to fully reflect in your premium.

Disclaimer

This article is for informational purposes only and does not constitute insurance or legal advice. Coverage details and costs vary by carrier and individual circumstances. Consult a licensed insurance agent for guidance specific to your situation.

Sources

• National Council on Compensation Insurance
• Insurance Information Institute
• U.S. Department of Labor
• National Federation of Independent Business