Insurance
Workers' comp premium & audit calculator.
Enter the rate per $100 of payroll from your own policy for each class, add your experience mod and any schedule credit or debit, then compare estimated payroll with audited payroll to see how much the audit moves the premium.
Your policy
Result
Method and limitations
Formulas: for each class, manual premium is payroll ÷ 100 × rate per $100. The class premiums are summed, multiplied by the experience mod, then by 1 + schedule % (a credit is a negative number). The expense constant and other charges are then added as flat dollars. The audit difference is the total on audited payroll minus the total on estimated payroll; positive means additional premium, negative means a return.
Source: the Texas Department of Insurance's workers' compensation rate guide states that the total payroll for each classification is multiplied by the classification's rate per $100 of payroll to determine premium, that the basic premium is the sum of the classification premiums, and that an experience rating modifier and a schedule rating debit or credit may be applied. That page does not describe an expense constant, so treating it and other charges as flat amounts added after the modifiers is an assumption; check your policy's rating worksheet.
No rates are built in. Class codes, rates, mods and how overtime is treated differ by state, bureau and carrier, and rates change. Copy the figures from your policy or quote. This is an estimate for planning, not an audit result or insurance advice, and your carrier's audit governs. Everything is calculated in your browser; nothing is sent anywhere.