How is workers' comp premium calculated in West Virginia?

The core formula is (annual payroll ÷ 100) × class-code base rate × experience modifier. West Virginia moved from a state monopoly fund to a private competitive market in 2008, so carriers set rates within NCCI-style classifications. Add an expense constant for the final premium.

What is an experience modifier?

The experience modification factor (mod) compares your claims history to similar businesses. A mod of 1.00 is average; below 1.00 means fewer claims and a discount, above 1.00 means more claims and a surcharge. It directly multiplies your manual premium.

Does West Virginia still use BrickStreet or a state fund?

West Virginia privatized workers' comp in 2008. BrickStreet Mutual was the initial successor and the market is now open to private carriers. There is no longer a single state fund, so base rates vary by insurer and class code.

What's an expense constant?

An expense constant is a small flat fee (often $150 to $250) added to every policy to cover the insurer's fixed administrative costs of issuing and servicing the policy, regardless of payroll size.

Is this my exact premium?

No. Real premiums also reflect schedule rating credits, premium discounts for size, minimum premiums, payroll caps for officers, and carrier-specific factors. Use this to ballpark cost across class codes; get a quote for binding numbers.

West Virginia Workers' Compensation Premium Calculator

Email me this result

Get this tool's output sent to your inbox, plus one useful tool a week. No spam, unsubscribe any time.

Workers’ compensation premium in West Virginia is driven by three things: how risky your job classification is, how much payroll you run through it, and your own claims history. This calculator combines them into an annual premium estimate.

How it works

The manual premium formula used across the NCCI-style market West Virginia adopted after privatizing in 2008 is:

manual premium = (annual payroll ÷ 100) × class base rate
final premium  = (manual premium × experience mod) + expense constant

The base rate is quoted per 100 dollars of payroll. Low-hazard office codes can sit under 0.40 dollars; high-hazard codes like roofing or logging can exceed 10 or even 20 dollars per 100. The experience modifier scales the result: 1.00 is average, 0.85 is a 15 percent credit, 1.20 is a 20 percent surcharge.

Example

A landscaping firm with a base rate of 5.50 dollars per 100, 400,000 dollars of payroll, and a mod of 1.10:

manual = (400,000 ÷ 100) × 5.50 = 4,000 × 5.50 = 22,000
final  = 22,000 × 1.10 + 200 = 24,400 dollars

Notes

This is a planning estimate, not a quote. Carriers apply schedule-rating credits and debits, premium-size discounts, minimum premiums, and capped payroll for business owners and officers. West Virginia’s competitive market means base rates differ by insurer. For binding numbers, request a quote and confirm your class code with the National Council on Compensation Insurance (NCCI) and the West Virginia Offices of the Insurance Commissioner.