Your Experience Modification Rate is a single number that follows your company everywhere. It affects how much you pay for workers' comp insurance. It determines whether you can bid on certain projects. And in many cases, it's the first thing an owner looks at when evaluating your safety record.
An EMR of 1.0 means your claims history matches the industry average. Below 1.0 means you're better than average. Above 1.0 means you're worse — and you'll pay for it.
How EMR Is Calculated
The EMR is calculated by the National Council on Compensation Insurance (NCCI) in most states, or by the state's own rating bureau. The formula compares your company's actual workers' comp claims to the expected claims for a company of your size and industry classification.
The basic formula:
EMR = Actual Losses / Expected Losses
But it's more nuanced than that. The calculation considers:
- Three years of claims history (excluding the most recent year)
- Frequency vs. severity — multiple small claims hurt your EMR more than one large claim
- Primary losses (first $5,000-$18,500 of each claim, depending on state) are weighted more heavily
- Excess losses (amounts above the primary threshold) have reduced impact
- Payroll volume — larger companies have more expected losses, which buffers individual claims
The weighting toward frequency is intentional. NCCI considers a company with ten $5,000 claims to be a worse risk than a company with one $50,000 claim. Frequency indicates a pattern; severity can be bad luck.
Why EMR Matters
Insurance Premiums
Your EMR is a multiplier on your workers' comp premium. The calculation:
Premium = Manual Rate × Payroll (per $100) × EMR
If your manual rate is $15 per $100 of payroll and your annual payroll is $2,000,000:
- EMR of 1.0: $300,000 premium
- EMR of 0.85: $255,000 premium (saving $45,000/year)
- EMR of 1.25: $375,000 premium (paying $75,000 more/year)
The swing between a 0.85 and a 1.25 EMR is $120,000 per year. Over the three years the EMR calculation covers, that's $360,000 — the cost of a few preventable injuries.
Bidding and Prequalification
Many project owners set maximum EMR requirements:
- Government projects typically require EMR at or below 1.0
- Large commercial owners often set limits of 0.90 or 0.95
- Some institutional owners (hospitals, schools) require 0.85 or lower
If your EMR exceeds the threshold, you can't bid. It doesn't matter how competitive your price is or how qualified your team is. The number disqualifies you.
Subcontractor Selection
Smart GCs evaluate their subcontractors' EMRs during prequalification. A sub with a high EMR brings higher risk to your jobsite — and if their workers get injured on your project, it can affect your own claims history.
What Drives EMR Up
Frequency of claims. Five claims of $3,000 each will increase your EMR more than one claim of $15,000. Every claim counts.
Severity of primary losses. The first $5,000-$18,500 of each claim is fully counted in the calculation. Medical-only claims (no lost time) receive a 70% discount.
Payroll decreases. If your payroll drops (fewer employees, lower wages), your expected losses decrease — but if your actual claims stay the same, your EMR goes up.
Claims that stay open. Open claims are estimated at their full potential value. A claim that could have been closed at $8,000 but stays open might be reserved at $25,000 — inflating your actual losses.
How to Lower Your EMR
Prevent Injuries
The most direct path to a lower EMR is fewer claims. This means:
- Site-specific safety plans that address actual hazards, not generic templates
- Toolbox talks that are relevant and engaging, not read-from-a-card compliance exercises
- PPE enforcement that's consistent — not just when someone's watching
- Hazard identification programs that encourage workers to report unsafe conditions before injuries happen
- Training that goes beyond OSHA minimums
Manage Claims Aggressively
When injuries do occur:
- Report immediately. Delayed reporting increases claim costs and complicates treatment
- Return-to-work programs. Get injured workers back in modified-duty roles as quickly as medically appropriate. Lost-time claims cost significantly more than medical-only claims
- Stay involved in the claims process. Don't just hand it to your insurance carrier and forget about it. Monitor reserves, challenge excessive estimates, and push for timely closure
- Close claims promptly. Open claims with high reserves inflate your EMR even if the final payout is small
Review Your Classification
Make sure your employees are classified under the correct workers' comp codes. Misclassification — putting office staff under a field classification, for example — inflates your manual rate unnecessarily.
Audit Your EMR Worksheet
Request your EMR worksheet from NCCI or your state bureau annually. Verify that:
- All claims listed are actually yours (not another company's)
- Claim amounts are accurate and current
- Closed claims aren't still showing high reserves
- Your payroll figures are correct
Errors happen more often than you'd think. A single misattributed claim can swing your EMR significantly.
EMR and Subcontractor Management
As a GC, your subs' EMRs should be part of your prequalification criteria. Here's a practical framework:
| EMR Range | Risk Level | Action |
|---|---|---|
| Below 0.85 | Low | Preferred sub — strong safety culture |
| 0.85 – 1.0 | Average | Acceptable for most projects |
| 1.0 – 1.15 | Elevated | Acceptable with enhanced safety monitoring |
| 1.15 – 1.3 | High | Consider alternatives; require safety improvement plan |
| Above 1.3 | Very High | Decline unless no alternative exists |
Remember that EMR is a lagging indicator — it reflects what happened over the past three years. A sub with a low EMR could have had a bad quarter recently that hasn't shown up yet. Combine EMR review with current safety program evaluation.
The Three-Year Window
EMR calculations use three years of data, excluding the most recent policy year. This means:
- A bad year takes two years to enter your EMR calculation and five years to fully cycle out
- Improvements in your safety program today won't show up in your EMR for 1-2 years
- You're always managing both current safety performance and the legacy of past years
This lag is frustrating but also motivating. The work you do today determines your EMR — and your competitive position — for the next several years.
Frequently Asked Questions
What's a "good" EMR for a construction company? Below 1.0 is generally considered good. Below 0.85 is excellent. The industry average is 1.0 by definition.
Can I get my EMR if I'm a new company? New companies don't have an EMR until they've been in business for at least two to three years (enough to generate the required claims history). During this period, you'll be assigned a 1.0 EMR by default.
Does my EMR follow me if I change insurance carriers? Yes. Your EMR is assigned to your company, not your insurance carrier. Switching carriers doesn't reset or change your EMR.
Can a single large claim destroy my EMR? Large claims are partially capped in the calculation (excess losses above the primary threshold are discounted). A single large claim will hurt, but the EMR formula is designed to prevent one catastrophic event from being disproportionately punishing. Multiple smaller claims are actually worse for your EMR.