Contractor Bond and Insurance Cost Estimator
Estimate your annual contractor bond and insurance costs based on your business revenue, trade type, and required coverage limits.
Formulas Used
General Liability Premium:
GL Premium = (Annual Revenue ÷ 1,000) × Trade Rate × Coverage Limit Multiplier
Trade rates range from $7.50 (landscaping) to $14.50 (roofing) per $1,000 revenue.
Limit multipliers: $500K = 0.75×, $1M = 1.00×, $2M = 1.35×, $5M = 1.85×. Minimum premium: $500.
Surety Bond Premium:
Bond Premium = Bond Amount × Bond Rate
Bond rates by credit: Excellent = 1.0%, Good = 2.0%, Fair = 3.5%, Poor = 8.0%. Minimum: $100.
Workers' Compensation Premium:
WC Premium = (Annual Payroll ÷ 100) × WC Class Rate
WC rates per $100 payroll: General $8.50, Electrical $6.00, Plumbing $7.00, HVAC $7.50,
Roofing $25.00, Painting $9.00, Landscaping $8.00, Concrete $9.50. Minimum: $300.
Tools & Equipment Rider:
Tools Rider = MIN(Annual Revenue × 0.5%, $2,000)
Total Annual Cost:
Total = GL Premium + Bond Premium + WC Premium + Tools Rider
Assumptions & References
- General Liability rates are based on industry benchmark ranges from the Insurance Information Institute (III) and NCCI commercial lines data.
- Surety bond rates reflect standard market rates from the Surety & Fidelity Association of America (SFAA); credit score is the primary underwriting factor.
- Workers' Compensation class rates are based on NCCI loss cost benchmarks; actual rates are state-filed and vary significantly by jurisdiction.
- Tools & Equipment rider is an estimate; actual coverage depends on equipment value and insurer.
- No claims history, experience modification factor (EMR), or prior losses are factored into this estimate. A poor claims history can increase premiums 25–100%+.
- Some states (e.g., WA, OH, ND, WY) require WC through a state fund rather than private insurers.
- Sole proprietors may be exempt from WC requirements in many states but should verify with their state's labor department.
- Bond amounts required vary by state and license type; check your state contractor licensing board for minimums.
- This tool does not include Professional Liability (E&O), Commercial Auto, Umbrella, or Builder's Risk policies, which may also be required.
- All estimates are for budgeting purposes only. Consult a licensed insurance broker for actual quotes and binding coverage.