Workers Compensation Premium Calculator

About the Workers Compensation Premium Calculator

Workers compensation insurance is required in nearly every state and covers medical expenses, lost wages, and rehabilitation for employees injured on the job. Premiums are calculated based on your total payroll, the class code rate for each job type, and your experience modification rate (EMR).

This calculator uses the standard workers' comp formula: Premium = (Payroll / $100) × Class Rate × EMR. Different employee classifications carry different rates — office workers might be $0.20 per $100 of payroll while roofers could be $20+ per $100. Your EMR reflects your claims history compared to similar businesses.

This is an educational estimate only. Actual premiums depend on your state, specific class codes, premium discounting tiers, assigned risk surcharges, and carrier-specific modifications. Work with a licensed workers' comp specialist for carrier quotes.

When This Page Helps

Workers' comp is mandatory in most states, and premiums can be a significant expense — especially for construction, manufacturing, and healthcare employers. Understanding the rating formula helps you budget accurately, identify opportunities to reduce costs, and verify your carrier's calculations at audit time.

How to Use the Inputs

1. Enter the annual payroll for the employee classification you want to rate.
2. Enter the class code rate per $100 of payroll (check NCCI or your state rating bureau).
3. Enter your experience modification rate (EMR) — 1.0 is average.
4. Optionally add additional classifications with their own payroll and rates.
5. Review the estimated annual premium and cost per $100 of payroll.
6. Compare against your current policy to check for discrepancies.

Example Calculation

Tips & Best Practices

• Ensure employees are correctly classified — clerical workers should not be rated as laborers.
• Invest in safety programs to reduce claims and lower your EMR over time.
• Owner/officer payroll can often be excluded or capped to reduce premiums.
• Pay-as-you-go programs base monthly premiums on actual payroll, improving cash flow.
• Request a mid-term audit if your payroll has significantly decreased.
• This is an educational estimate only — consult a licensed workers' comp specialist for binding quotes.

Understanding Workers Comp Rating

Workers compensation uses a straightforward but layered rating approach. The foundation is payroll classified by job type, multiplied by a rate that reflects injury frequency and severity for that classification. Your EMR then adjusts the premium based on your actual claim history.

The Power of EMR

EMR is the single most impactful factor you can control. A business with a 0.80 EMR pays 20% less than average, while a business at 1.30 pays 30% more. EMR is calculated using three years of loss history, so the impact of a bad year persists. Consistent safety investment is the key to a low EMR.

Cost Reduction Strategies

Beyond safety, ensure proper employee classification, exclude eligible owners, consider higher deductibles (in states that allow it), implement a return-to-work program to reduce lost-time claims, and explore group or association programs for potential credit.

Frequently Asked Questions

• How are workers comp premiums calculated?

  The formula is Premium = (Payroll / $100) × Class Code Rate × EMR. Payroll is the exposure base, the class code rate reflects the injury risk of the job type, and the EMR adjusts for your specific claims history.

• What is a class code rate?

  Class codes group jobs by injury risk. Each code has a rate per $100 of payroll. Office workers (code 8810) might be $0.20, while carpentry (code 5403) might be $8.00. NCCI or your state rating bureau publishes current rates.

• What is a good EMR?

  An EMR of 1.0 is average for your class and state. Below 1.0 means fewer claims than expected, earning a discount. Above 1.0 means more claims, adding a surcharge. Top performers achieve EMRs of 0.70-0.85.

• Can I exclude owner payroll?

  In most states, sole proprietors, partners, and LLC members can elect to exclude themselves from workers' comp. Corporate officers may opt out in some states but are usually included with minimum/maximum payroll caps.

• What happens at the annual audit?

  Your carrier audits actual payroll against the estimate used to set the initial premium. If payroll was higher, you owe additional premium. If lower, you receive a refund. Accurate payroll estimates minimize audit surprises.

• Does workers comp cover COVID-related illness?

  Many states have created presumptions that certain workers (healthcare, first responders) who contract COVID did so at work. Coverage varies by state and occupation. Check your state's workers' comp board for current rules.