How is workers' comp premium calculated in Michigan?

The base formula is the same nationwide: divide annual payroll by 100, multiply by the class-code base rate, then multiply by your experience modifier. For example, $250,000 of clerical payroll at a $0.13 per $100 rate with a 1.00 modifier is ($250,000 ÷ 100) × $0.13 × 1.00 = $325 per year, before credits and fees.

Does Michigan have a state workers' comp fund?

Michigan does not run a competitive state fund. Coverage is purchased from private carriers in an open, competitive market. Employers who cannot get coverage on the voluntary market are placed through the Michigan Workers' Compensation Placement Facility (the assigned-risk pool), which typically costs more than voluntary-market coverage.

Who needs workers' comp insurance in Michigan?

Most Michigan employers with employees must carry workers' compensation. The general rule covers private employers who regularly employ at least one worker 35 or more hours per week for 13 or more weeks, or who employ three or more workers at any one time. Agricultural, domestic, and certain other employers have specific rules. Penalties for not carrying coverage can be significant.

What is an experience modifier (EMR)?

The experience modification rate compares your past claims to others in the same class. A modifier of 1.00 is average. A history of fewer or smaller claims lowers it (for example 0.85), reducing your premium, while a worse-than-average loss history raises it (for example 1.20), increasing your premium. Small employers may be too small to qualify for an experience rating.

Are class-code rates in this tool exact?

No. The presets are illustrative ranges to help you sanity-check a quote. Actual Michigan rates are set by carriers using NCCI or Michigan-specific loss costs plus each carrier's loss cost multiplier, so they vary widely. Always rely on a quote from a licensed Michigan agent rather than these estimates.

Michigan Workers' Comp Premium Calculator 2025 — Estimate Annual Cost

Email me this result

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

This calculator estimates an annual Michigan workers’ compensation premium using the same formula carriers use nationwide: payroll per $100, multiplied by a class-code base rate, multiplied by your experience modifier. Michigan is an open, competitive market with no state-run fund, so rates vary by carrier — this tool gives you a quick sanity check before or against a quote.

How it works

Premium is built up in three steps:

Manual premium = (Annual payroll ÷ 100) × Class base rate Modified premium = Manual premium × Experience modifier (EMR) Net premium = Modified premium − schedule credits (+ debits)

The class-code base rate reflects how risky the work is — clerical work is cheap, roofing is expensive. The experience modifier scales that up or down based on your own claims history, and schedule credits or debits reflect underwriting judgment.

Michigan workers’ comp notes

Michigan has no competitive state fund. Employers buy coverage from private carriers, and those who cannot obtain voluntary-market coverage are placed through the Michigan Workers’ Compensation Placement Facility (the assigned-risk pool), which is generally more expensive. Most Michigan employers with employees must carry coverage; the threshold generally covers anyone employing one worker 35+ hours per week for 13+ weeks, or three or more workers at once.

Class-code base rates here are illustrative; actual rates come from carrier loss costs plus a loss cost multiplier.

Worked example

A landscaping firm with $250,000 of payroll in a class rated at $3.20 per $100, EMR 1.10:

Manual premium = (250,000 ÷ 100) × $3.20 = $8,000
Modified premium = $8,000 × 1.10 = $8,800
With a 5% schedule credit = $8,800 − $440 = $8,360 per year

Note: This is an estimate, not an insurance quote. Real Michigan premiums depend on carrier rates, exact class codes, payroll audits, and credits. Confirm with a licensed Michigan agent.