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Experience Modification Rate (EMR) Explained

Your EMR is the single most controllable factor in your workers comp premium — here’s how it works and what you can do to lower it.

• ✓EMR below 1.0 earns a premium credit — above 1.0 adds a surcharge
• ✓Three years of claims history determines your current EMR
• ✓Frequency of claims hurts more than a single large claim
• ✓Errors in the EMR calculation are common — and correctable

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What the Experience Modification Rate Actually Measures

Your experience modification rate (EMR) is a number — usually ranging from 0.50 to 2.00 or more — that compares your claims history to other contractors in the same trade and state. It’s calculated annually by the NCCI (or your state’s rating bureau) and applied as a multiplier to your workers comp base premium.

An EMR of 1.0 means you’re average. A 0.85 means your claims history is better than average, earning a 15% premium discount. A 1.30 means your history is significantly worse, adding a 30% surcharge. On a $50,000 base premium, that’s a $15,000 difference between 0.85 and 1.30.

The EMR is published in a document called the Experience Rating Worksheet, issued by NCCI. Every contractor subject to experience rating should request this worksheet annually and review it for accuracy.

How the EMR Is Calculated

The NCCI experience rating formula uses three policy years, excluding the most recent year. So your 2025–2026 policy uses claims from 2020–2021, 2021–2022, and 2022–2023. Claims from last year don’t show up in your EMR until two renewals later.

The formula splits each claim into primary losses and excess losses. Primary losses are the first portion of each claim — currently around $18,700 per claim under NCCI’s formula. These are weighted at full value because they represent claim frequency. Excess losses above that threshold are discounted because they represent severity, which is harder to control.

This weighting means three small claims ($6,000 each) can raise your EMR more than one $30,000 claim. Frequency is the bigger signal to the formula. A zero-claim year eliminates primary losses entirely for that period, which is disproportionately beneficial to your EMR.

Common Errors in EMR Worksheets

EMR worksheets contain errors more often than most contractors realize. Common issues include: claims closed without payment still appearing as losses, claims from the wrong policy period, payroll figures that don’t match actual audited payroll, and subrogation recoveries not reflected in the loss data.

Each of these errors inflates your EMR — and therefore your premium. Requesting and reviewing your Experience Rating Worksheet each year is not optional if you’re serious about controlling premium costs. Compare every claim listed against your own records.

If you find an error, submit a written dispute to NCCI (or your state bureau) with supporting documentation — the closed claim with zero payment, the correct payroll records, or the subrogation recovery documentation. Successful corrections lower your EMR retroactively.

Strategies to Lower Your EMR Over Time

The most direct path to a lower EMR is fewer claims. A formal return-to-work program reduces the duration of lost-time claims, which is the largest driver of claim cost. Even bringing an injured worker back in a light-duty capacity dramatically lowers the wage replacement portion of the claim.

Pre-employment drug screening and post-injury drug testing reduce fraudulent claims and identify high-risk hires before they become your liability. Written safety programs, toolbox safety meetings, and OSHA certification all signal a lower-risk workforce to your carrier and can earn schedule credits on top of your EMR discount.

For contractors with a prior bad year, the three-year rolling window means recovery takes time. But with zero or minimal claims in the next two policy years, the high-loss year will age out of the calculation, and your EMR can improve substantially in a single renewal cycle.

EMR Thresholds That Affect Bidding

Many GCs and public agencies have EMR prequalification thresholds — typically 1.0, 0.95, or 1.10 depending on the project. If your EMR exceeds their threshold, you can’t bid the job regardless of your price. This makes EMR a revenue issue, not just a premium issue.

Federal contracts, DOT projects, and large commercial GCs often require an EMR below 1.0. Some require below 0.90. Knowing where you stand — and where you need to be to access better work — should drive your claims management strategy.

If your EMR is temporarily elevated due to a single large claim or a disputed claim, your agent can sometimes provide a letter of explanation to prospective GCs describing the circumstances. This won’t override a hard cutoff, but it can help with GCs who are flexible on interpretation.

Why Contractors Use Trade Safe Insurance

Frequently Asked Questions

Related Resources

Workers Comp Cost for Contractors
Workers Comp Class Codes for Contractors
Workers Comp Audits — What to Expect
High-Risk Workers Comp Markets for Contractors

Let Us Review Your EMR Before Your Next Renewal

We check your Experience Rating Worksheet for errors that inflate your premium — and shop your renewal across carriers who price your EMR fairly.