Experience Modification Rate (EMR)
A multiplier applied to workers' comp premiums based on a company's claims history relative to its industry.
The Experience Modification Rate (EMR), also called the "experience mod" or "mod factor," is a multiplier used to adjust a business's workers' compensation insurance premium based on its actual claims history compared to the expected claims for businesses in the same industry.
An EMR of 1.0 is the industry average. An EMR below 1.0 (e.g., 0.85) means the business has better-than-average claims history and pays lower premiums. An EMR above 1.0 (e.g., 1.25) means worse-than-average claims history and higher premiums.
For businesses in high-risk industries like construction, a high EMR can significantly increase workers' comp costs and make it difficult to win contracts (many general contractors require subcontractors to have an EMR below 1.0). PEOs can help businesses improve their EMR through safety programs and claims management.
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