How is a Maine workers' comp premium calculated?

Premium starts with your annual payroll divided by 100, multiplied by the classification code base rate (dollars per $100 of payroll), then multiplied by your experience modification rate. The formula is the same nationwide; only the class-code rates and your mod differ. Carriers then add expense constants and minimum premiums to reach the final bill.

What is an experience modification rate (EMR)?

The EMR compares your claims history to others in your class. A mod of 1.00 is average; below 1.00 means a better-than-average safety record and a lower premium, while above 1.00 raises your premium. New or small employers usually start at 1.00 until they have enough payroll and loss history to be experience-rated.

Does Maine have a state workers' comp fund?

No. Maine has no competitive state insurance fund. Employers buy coverage from private carriers — MEMIC, the Maine Employers' Mutual Insurance Company, is the largest writer — or qualify for approved self-insurance. Because there is no monopolistic fund, there is no state-fund-versus-private rate split as you would see in a monopolistic state.

Why does the class code matter so much?

The class code reflects injury risk. A clerical office code might be around $0.14 per $100 of payroll, while logging or roofing can exceed $10 per $100. Using the wrong code dramatically changes the estimate, so choose the code that best matches the actual work your employees perform.

Is this an actual quote?

No. It is a planning estimate. Real Maine premiums depend on each carrier's approved loss-cost filing with the Maine Bureau of Insurance, plus expense constants, schedule credits or debits, payroll audits, and minimum premiums. Get a bound quote from a licensed Maine insurance agent before budgeting.

Maine Workers' Compensation Premium Calculator

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This calculator estimates the annual workers’ compensation premium a Maine employer would pay for a group of employees, using the same build-up insurers use. Workers’ comp is priced per $100 of payroll, by the type of work, and adjusted by your claims history.

How it works

The premium build-up has three steps:

Manual premium = (Annual payroll ÷ 100) × Class-code base rate

Modified premium = Manual premium × Experience Modifier (EMR)

The class code captures injury risk: clerical and office work carry the lowest rates, while trades like plumbing, carpentry, trucking, and logging carry much higher rates. The EMR then rewards or penalizes your own safety record — 1.00 is average, below 1.00 lowers the premium, above 1.00 raises it.

Maine-specific notes

Maine is an NCCI state for classification and rating, and it has no competitive state fund. Employers buy coverage from private carriers — MEMIC writes the largest share — or use approved self-insurance. Actual base rates come from each carrier’s loss-cost filing approved by the Maine Bureau of Insurance, so the figures here are representative rather than a quote. The statewide average is roughly $1.10–$1.30 per $100 of payroll across all classes.

Example

A small contractor with $100,000 of carpentry payroll (class 5645 at about $7.20 per $100) and an average mod of 1.00:

Payroll units = $100,000 ÷ 100 = 1,000
Manual premium = 1,000 × $7.20 = $7,200
Modified premium = $7,200 × 1.00 = $7,200 per year

Note: Final premiums also include expense constants, schedule credits, payroll audits, and minimum premiums. Treat this as a budgeting estimate and confirm with a licensed Maine agent.