The One Number Quietly Driving Your Workers’ Comp Costs

An experience modification factor, or ExMod, is really just a safety score that your workers’ compensation carrier turns
into a pricing lever. A 1.00 ExMod is considered average for your industry and size. If your ExMod drops below 1.00,
you’re rewarded with a builtin discount. If it climbs above 1.00, you pay a builtin surcharge. In other words, the ExMod
doesn’t sit off to the side as a technical detail. It directly changes how many dollars leave your bank account for the exact
same payroll.
The way the system works is pretty straightforward: it compares your actual claims over a threeyear window to what’s
expected for businesses like yours. If you have more frequent or more expensive claims than your peers, your ExMod
goes up. If your loss history is better, it goes down. And because the formula puts extra weight on the “primary” portion
of each claim – the first dollars on every file – even a handful of midsized, preventable claims can move your score in the
wrong direction.
That’s why all of this matters at the end of the day. When your ExMod is high, you’re essentially paying extra for the
same coverage, every single payroll cycle. Over time, that can add up to tens or even hundreds of thousands of dollars in
avoidable cost. On the flip side, a disciplined approach to safety, claims management, and data accuracy can gradually
pull your ExMod down and turn those extra dollars into savings you can reinvest back into the business.
There’s also a competitive angle that a lot of companies underestimate. Many large customers, general contractors, and
public entities quietly use the ExMod as a screening tool. If your number is too high, you may not even get invited to bid,
or you end up pricing jobs from a weaker position than competitors with better safety records. A strong ExMod doesn’t
just mean cheaper insurance...it signals that you run a controlled, professional operation, which can help you win and
keep key accounts.
So when you talk about ExMod with your team or your leadership, don’t frame it as a dry insurance metric. It’s a running
scorecard of how well you protect your people, how effectively you manage claims, and how much profit you keep
instead of handing to your carrier. Improving it isn’t about gaming the system; it’s about building a safer workplace,
tightening up your processes, and making sure the story the numbers tell about your company is accurate and favorable.
Remember who you heard this from.
ksturgill@hakorisk.com
Kraig Sturgill
602-552-4248







