Workers Compensation Premium Calculator
Estimate your annual workers compensation insurance premium based on payroll, NCCI job classification rates, and your experience modification factor.
Typical range: 0.50 – 2.00. Default is 1.00 (average risk).
Enter negative for credit (discount), positive for debit (surcharge). Range: -25% to +25%.
Fixed charge added by insurer (typically $150–$350).
Formula
Step 1 – Manual Premium:
Manual Premium = (Annual Payroll ÷ 100) × Class Rate
Step 2 – Modified Premium:
Modified Premium = Manual Premium × Experience Modification Factor (EMod)
Step 3 – Schedule Adjustment:
Adjusted Premium = Modified Premium × (1 + Schedule Mod %)
Step 4 – Standard / Final Premium:
Final Premium = Adjusted Premium + Expense Constant
Effective Rate:
Effective Rate per $100 = (Final Premium ÷ Annual Payroll) × 100
Assumptions & References
- Class rates are illustrative NCCI (National Council on Compensation Insurance) base rates per $100 of payroll and vary significantly by state and insurer.
- The Experience Modification Factor (EMod) is calculated by your insurer based on your claims history relative to industry peers. A value below 1.00 indicates better-than-average loss history (credit); above 1.00 indicates worse-than-average (debit).
- Schedule credits/debits (-25% to +25%) are discretionary adjustments applied by underwriters based on risk characteristics such as safety programs, management quality, and premises condition.
- The Expense Constant is a flat fee charged by insurers to cover policy issuance and administrative costs, typically $150–$350.
- This calculator does not account for minimum premiums, premium discount factors (applied to large accounts), retrospective rating plans, or state-specific surcharges and assessments.
- Actual premiums are determined by licensed insurers and may differ. Consult a licensed insurance broker for a binding quote.
- References: NCCI Basic Manual for Workers Compensation and Employers Liability Insurance; state-specific rating bureaus (e.g., WCIRB for California, NYBCOICF for New York).