Workers Compensation Premium Calculator
Last updated: October 15, 2026
Estimate workers compensation premium from payroll, class rate and experience modifier.
Estimated annual workers comp premium
—
- Manual premium before modifier: —
- Premium after experience modifier: —
- Effective cost per $100 payroll: —
On this page
Quick summary: Estimate workers compensation premium from payroll, class rate and experience modifier.
Read the complete guide
Updated reference sections in this guide are in English.
What this calculator estimates
Estimate workers compensation premium from payroll, class rate and experience modifier.
How to use it
Enter Annual payroll ($); Class rate per $100 of payroll ($); Experience modification factor; Policy fees and assessments ($). Select Calculate to update the results.
How the calculation works
Manual premium equals payroll divided by $100 times the class rate. The result is multiplied by the experience modifier, then fees are added.
Worked example: starting scenario
| Annual payroll ($) | 1000000 |
|---|---|
| Class rate per $100 of payroll ($) | 1.25 |
| Experience modification factor | 0.9 |
| Policy fees and assessments ($) | 750 |
| Estimated annual workers comp premium | $12,000.00 |
|---|---|
| Manual premium before modifier | $12,500.00 |
| Premium after experience modifier | $11,250.00 |
| Effective cost per $100 payroll | $1.20 |
Important limitations
Actual premiums depend on class codes, state rules, carrier pricing, audits, minimum premiums, discounts and assessments.