Tools
Calculators and References for Roofing Contractors
Practical reference pages for the math and numbers every roofing business owner runs into — job pricing, insurance cost, markup vs margin, and workers' comp rates.
Roofing Cost Calculator
How to estimate a roofing job by the square — materials, labor, overhead, and the markup math every new roofing contractor gets wrong.
OpenRoofing Insurance Cost Estimator
Ballpark annual premium for general liability and workers' comp based on your state, payroll, and gross revenue.
OpenMarkup vs Margin Calculator
The $1,000-per-job math mistake most roofing contractors make. Divide-by formulas, worked examples, and what to actually target.
OpenWorkers' Comp Rate Lookup (Class Code 5551)
NCCI class code 5551 rates by state — per $100 of roofer payroll — plus the monopolistic-state exceptions every roofing business owner should know.
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