08/31/2026
Two businesses with identical payroll. One pays $85,000 in workers' comp premium. The other pays $120,000.
The difference is a single number called your Experience Modification factor — your MOD (aka "E-Mod", "Experience Mod") — and if you have employees, it's one of the most consequential numbers in your business.
Here's how it works.
Your MOD can be thought of as a scorecard for you business. It compares your workers' comp loss history over a rolling three-year window against similar businesses in your industry. A neutral MOD is 1.00. Below 1.00 you're a credit and pay less than standard. Above 1.00 you're a debit and pay more.
On a business with $100,000 in standard workers' comp premium:
• A 0.85 MOD pays $85,000
• A 1.20 MOD pays $120,000
That's a $35,000 gap every year on the same payroll. Compound it over a few years and you've either funded a hire, a piece of equipment, or a distribution to yourself...or lost it.
Here's the part most owners don't realize: your MOD isn't something that happens to you. It's something you build. Return-to-work programs, claims management, safety culture, and documentation all flow into it. A proactive carrier claims team can shave points off your MOD year over year. A passive one lets losses drag it up for reasons that have nothing to do with new injuries.
Three things worth checking:
1. Your current MOD in writing — and what it was three years ago
2. Which specific claims are driving it up (and whether any are still open that shouldn't be)
3. When your agent last walked you through the calculation itself, not just the premium
A MOD is the closest thing in commercial insurance to a business metric you can actually manage.
More on this in The Commercial Insurance Buyer's Playbook. Link in the comments.