What Is an Experience Mod? A Plain-English Guide for Business Owners
An experience modification factor (X-Mod) is a number that raises or lowers your workers' compensation premium based on your claims history. Here's how it works.
Your experience modification factor — usually called your X-Mod, e-mod, or just 'mod' — is a multiplier applied to your workers' compensation premium. A mod of 1.00 is average. Below 1.00 saves you money. Above 1.00 costs you more.
How is the experience mod calculated?
NCCI (or your state rating bureau) compares your actual claim losses over the last three complete policy years to the losses expected for a business of your size and industry. The formula weights claim frequency more heavily than severity, which is why several small claims can hurt your mod more than one large claim.
Why does the experience mod matter?
Two identical businesses with the same payroll can pay very different premiums based on their mod. A mod of 1.20 means you pay 20% more than average. A mod of 0.80 means you pay 20% less. Over three years, that gap becomes six or seven figures for mid-sized employers.
How can I lower my experience mod?
- Reduce claim frequency with leading-indicator safety programs.
- Close claims quickly with an active return-to-work program.
- Verify class codes and payroll before the annual audit.
- Challenge stale carrier reserves that inflate your losses.
An OptiMOD review looks at all four levers at once and identifies which will move your mod the fastest.