How Workers Comp Works
Workers compensation is a no-fault insurance system: when an employee is injured on the job, workers comp pays for their medical treatment and lost wages regardless of who was at fault. In exchange, the employee gives up the right to sue the employer for the injury.
This trade-off benefits both parties: the employee gets guaranteed benefits without needing to prove negligence. The employer gets protection from potentially devastating lawsuits. The insurance carrier manages the risk and funds the benefits.
The Premium Calculation
Workers comp premiums are calculated using a formula that every commercial agent should understand:
Premium = (Payroll ÷ 100) × Class Code Rate × Experience Modification Rate
Payroll
The base of the calculation is the employer's total payroll, broken out by job classification. An office worker and a carpenter at the same company are rated separately because their risk levels are dramatically different.
Class Codes
Every job type is assigned a class code with a corresponding rate per $100 of payroll. Office workers (class code 8810) might have a rate of $0.20 per $100 of payroll. Roofers (class code 5551) might have a rate of $25.00 per $100 — more than 100x higher. The class code reflects the statistical risk of injury for that type of work.
Getting the class codes right is critical. An employee misclassified as a higher-risk code dramatically overpays. An employee misclassified as a lower-risk code creates audit exposure.
Experience Modification Rate (EMR)
The EMR is the most impactful variable for individual employers. It compares your actual claims experience over the past 3 years to the expected claims for businesses of your size and industry:
- EMR = 1.0: Average claims experience. You pay the base rate.
- EMR = 0.85: Better than average. You pay 85% of the base rate (15% discount).
- EMR = 1.25: Worse than average. You pay 125% of the base rate (25% surcharge).
For a business with $200,000 in annual workers comp premium at a 1.0 mod, the difference between a 0.85 and a 1.25 mod is $80,000 per year. This is why claims management and safety programs matter so much.
How Agents Add Value
Classification Review
Review every client's class codes against their actual job duties. NCCI estimates that misclassification affects a significant percentage of workers comp policies. Finding and correcting a misclassification can save the client thousands — and earns their trust immediately.
Mod Review
Request and review the client's experience modification worksheet. Check that: all claims are accurately reported, closed claims are reflected, payroll figures are correct, and the calculation follows the proper formula. Errors in the mod calculation are more common than most agents realize.
Safety Program Recommendations
Help clients understand that every prevented injury reduces their EMR — and their premium — for three years. Basic safety programs, return-to-work policies, and proper claims management can move a 1.2 mod to a 0.9 mod over 3-4 years, saving the client 25-30% on their workers comp premium.
Carrier Selection
Different carriers offer different advantages for workers comp: some specialize in specific industries, some offer better dividend programs, some provide superior claims management, and some offer pay-as-you-go billing that improves cash flow. Match the carrier to the client's specific needs.
Workers Comp as a Relationship Builder
Workers comp is often the largest insurance expense for businesses with significant payroll. When you help a client save 15-25% on their workers comp through mod review, classification correction, and safety programs, you have earned a client for life. They will trust you with their entire commercial package — CGL, property, auto, umbrella — because you proved your value on the line that matters most to their bottom line.