For businesses with employees — especially contractors and industrial operations — the Workers Compensation Experience Modification Rate (EMR or "mod") is one of the most important numbers in your insurance program. A high mod means higher premiums and, in many cases, disqualification from competitive bids.
What Is the Experience Modification Rate?
The EMR is a multiplier applied to your Workers Compensation premium based on your claims history relative to other businesses in your industry of similar size. The calculation is maintained by the Workers Compensation Insurance Rating Bureau (WCIRB) in California.
- EMR of 1.00: Average — your claims experience matches industry peers
- EMR below 1.00: Better than average — you receive a credit on your premium
- EMR above 1.00: Worse than average — you pay a surcharge on your premium
The modification is calculated using three years of claims experience, with the most recent completed policy year excluded from the current calculation.
How Claims Affect Your Mod
Both the frequency (number of claims) and severity (cost of claims) affect your EMR. Frequency is actually weighted more heavily in the WCIRB formula than severity — meaning multiple small claims can hurt your mod more than a single larger claim.
This has important implications: reporting every minor incident formally, even if it turns out to be minor, may negatively affect your mod in future years.
Practical Steps to Lower Your EMR
1. Implement a Formal Safety Program
OSHA compliance, regular safety meetings, and documented safety procedures directly reduce injury frequency. Carriers often provide premium credits for formal safety programs.
2. Return-to-Work Programs
Getting injured employees back to work — even in modified duty — reduces the total indemnity paid on claims, which directly improves your mod over time.
3. Aggressive Claims Management
Work with your carrier and agent to actively manage open claims. Reserving errors and delayed medical treatment can inflate claim costs unnecessarily.
4. Proper Classification
Make sure your employees are classified in the correct WCIRB class codes. Misclassification — even unintenionally — can result in higher premium than necessary.
5. Annual EMR Review
Review your mod worksheet with your agent annually. WCIRB calculations can contain errors that, when corrected, improve your mod.
Work With Capital & Co
Capital & Co can review your current Workers Comp program, analyze your EMR worksheet, identify opportunities for improvement, and help you build a risk management strategy that lowers your long-term premium costs.
Questions About Your Coverage?
Speak with Capital & Co about a strategy built for your business.
