Workers Comp Premium Calculator

The EMR multiplies the entire manual premium, so a business with an EMR of 1.2 pays 20% more than the industry-average baseline for its class code, while an EMR of 0.8 pays 20% less — and because that factor is recalculated periodically from your claims history, a bad year of injuries doesn't just cost you once, it raises your premium multiplier for years afterward.

The potential savings figure models a 0.1-point improvement in your experience mod rate, which applied to the manual premium shows a concrete annual dollar impact — for a mid-size payroll, even a modest EMR improvement from better safety practices, claims management, or return-to-work programs can add up to meaningful savings compounded over multiple years.

The class code rate is a base price per $100 of payroll set for your specific occupation classification, reflecting that occupation's typical injury risk before anything about your specific business is factored in. The final premium adjusts that base rate for your own experience mod and any safety discounts, so two businesses in the same class code can pay very different final premiums.

Workers' comp insures against wage-replacement and medical costs from workplace injuries, and both of those scale with how much payroll — and therefore how many worked hours and how many employees — is exposed to that class code's risk. Doubling payroll for the same workforce composition roughly doubles the manual premium before any experience or discount adjustments are applied.