EMR explained: what a good experience modification rate is, and how to lower yours

Few numbers matter more to a contractor's bottom line — and to whether it can bid at all — than its EMR. It quietly raises or lowers your insurance bill every year, and on more and more projects an EMR above a set threshold means you are not allowed to bid, full stop. Yet plenty of business owners have never had it explained. This guide covers what the EMR is, what counts as a good one, how it is calculated, and the proven ways to bring it down.

What the EMR is

EMR stands for Experience Modification Rate (also called the experience mod or e-mod). It is a multiplier applied to your workers' compensation insurance premium that reflects your claims history compared with other businesses of similar type and size. The benchmark is 1.0 — an average risk. An EMR below 1.0 means your loss experience is better than average, and you pay less than the base premium. An EMR above 1.0 means worse than average, and you pay more. An EMR of 0.85 means you pay 85% of the base premium; an EMR of 1.25 means you pay 125%. On a large workers' comp bill, the difference between a 0.85 and a 1.25 is enormous.

What counts as a good EMR

Because 1.0 is the industry average for your class, anything under 1.0 is better than average and anything over is worse. In practice, a strong safety-focused contractor often runs in the 0.80–0.90 range, and many large projects and owners set a hard cutoff — commonly an EMR at or below 1.0, and sometimes lower — as a condition of bidding. That is the shift that has made the EMR so important: it is no longer just an insurance number, it is a gate to work. A contractor with an EMR of 1.2 may be shut out of projects before price is even discussed.

How it is calculated

The EMR is calculated by a rating bureau (NCCI in most states, or an independent state bureau) from your workers' comp data over a three-year window — typically the three years ending one year before the current policy period, so the most recent year is not yet included. The formula compares your actual losses to the expected losses for a business of your size and class. A crucial detail: the formula weighs the frequency of claims more heavily than the severity of any single one. Several small claims typically hurt your EMR more than one large, unusual loss — because frequency is seen as a better predictor of future risk. That is why a pattern of minor, preventable injuries is so damaging, and why controlling small incidents matters as much as avoiding catastrophic ones.

How to lower your EMR

Because the EMR is driven by claims over three years, lowering it is a medium-term project, not an overnight fix — but the levers are well established. First, prevent claims with a genuine safety program: hazard assessments, JHAs, training and the daily discipline that stops the frequent small injuries that hurt you most. Second, run a return-to-work / light-duty program so injured workers come back to suitable duties promptly — claims where an employee stays out of work are far more expensive and weigh more heavily than those closed quickly. Third, manage claims actively: report promptly, investigate, work with your carrier, and make sure claims are reserved and closed accurately, because open reserves inflate your losses. Fourth, audit your data — errors in payroll classification or claim coding on your experience rating worksheet are common and can push your EMR up unfairly; check the worksheet each year. None of this is a trick; it is the same safety management that keeps people from getting hurt in the first place.

Why it connects to everything else

The EMR is where safety stops being a cost and becomes a competitive advantage you can measure. A low EMR earns a lower insurance premium, clears the bidding thresholds that lock others out, and reads to owners and prequalification networks like ISNetworld and Avetta as a low-risk contractor. And the thing that drives it down — fewer, smaller, well-managed claims — is exactly what a real safety program produces. Keeping your program, training, incident records and OSHA 300 log current is not paperwork for its own sake; it is the machinery that moves the number that moves your premium and your ability to bid.