Your Experience Modification Rate — E-Mod for short — is a single number that has an outsized effect on what you pay for workers’ compensation. Most business owners have heard the term but couldn’t explain how it’s calculated or how to influence it. Here’s the plain-language version.
How E-Mod Works
E-Mod compares your business’s actual claims history against the expected claims for a business of your size and industry. A rating of 1.0 is “average” for your class code. Below 1.0 means better-than-average claims experience — you pay less. Above 1.0 means worse-than-average — you pay more. The multiplier applies directly to your base premium.
Why E-Mod Errors Are So Common
E-Mod is calculated from data reported by your carrier to a rating bureau — not from a fresh review of your actual circumstances. Clerical errors, outdated claims that should have closed, or claims attributed to the wrong policy year can all inflate your rating. Nobody catches it unless someone specifically audits for it.
What You Can Actually Do About It
- Request your E-Mod worksheet and review the claims listed against it
- Confirm claims marked “open” are actually still open
- Verify payroll and classification data match what was reported
- Address claims management proactively — faster claim closure improves future E-Mod
- Implement a return-to-work program to shorten claim duration
