New Jersey Contractor Insurance Cost Estimator
Estimate your annual insurance costs as a contractor in New Jersey, including General Liability, Workers' Compensation, and Commercial Auto coverage. Results are estimates based on industry averages and NJ rate filings.
Formulas Used
General Liability:
GL Premium = (Annual Revenue ÷ 1,000) × Trade Base Rate × GL Limit Multiplier × Experience Modifier × Claims Modifier + NJ Fees (2%)
Minimum premium: $750
Workers' Compensation:
WC Premium = (Annual Payroll ÷ 100) × NJ WC Rate (per $100 payroll) × Experience Modifier × Claims Modifier + NJ JUA Assessment (2.5%)
Minimum premium: $500
Commercial Auto:
Auto Premium = Number of Vehicles × $2,200 (NJ avg) × Trade Loading Factor
Experience Modifier: New business: +25%; <2 yrs: +15%; <5 yrs: +5%; 5–9 yrs: 0%; 10+ yrs: −5%
Claims Modifier: 0 claims: 0%; 1 claim: +15%; 2 claims: +35%; 3+ claims: +60%
Estimated Range: Grand Total ± 20% to reflect carrier variation
Assumptions & References
- GL base rates derived from ISO Commercial Lines Manual and NJ DOI rate filings for contractor classifications.
- Workers' Compensation rates based on NCCI NJ loss costs for common contractor class codes (e.g., 5183 Plumbing, 5551 Roofing, 5190 Electrical, 5403 Carpentry).
- Commercial auto average of $2,200/vehicle reflects NJ's status as the highest-cost auto insurance state per NAIC 2022–2023 data.
- NJ WC JUA (Joint Underwriting Association) assessment of 2.5% applied per NJ DOL guidelines.
- Experience modifier is a simplified proxy; actual NCCI experience mods require 3 years of loss history and payroll data.
- Estimates assume standard admitted market placement. Surplus lines placements add a 5% NJ surplus lines tax.
- Does not include: Inland Marine / Equipment Floater, Professional Liability (E&O), Umbrella/Excess, or Builder's Risk coverage.
- NJ contractors with annual payroll over $500,000 may qualify for experience-rated WC policies with significant deviations from these estimates.
- All figures are estimates only. Actual premiums vary by carrier, underwriting review, loss history, and specific job types. Consult a licensed NJ insurance broker for binding quotes.
- References: NJ DOI (doi.nj.gov), NCCI (ncci.com), ISO/Verisk, NAIC State Average Expenditures Report 2023.