The Experience Modification Rate, Explained
Your experience modification rate - also called an EMR, mod, or x-mod - is a number that NCCI (National Council on Compensation Insurance) assigns to your business each year. It's a multiplier applied directly to your workers' comp base premium. If your mod is 1.0, you pay the base rate. If it's 0.85, you pay 15% less. If it's 1.35, you pay 35% more.
The math is simple. The implications are not. A mod of 1.35 on a $20,000 annual premium costs you an extra $7,000 per year compared to an average-risk contractor doing the same work. On a $100,000 premium, it's a $35,000 annual penalty. The mod follows you from carrier to carrier - it's not something you escape by switching insurers.
How NCCI Calculates Your Mod
NCCI pulls three years of claims data - but not the most recent year. So in 2026, your mod is based on claims from 2022, 2023, and 2024. The most recent policy year is excluded because it hasn't fully developed yet.
Within those three years, NCCI looks at two things: how many claims you had (frequency) and how expensive they were (severity). Frequency is actually weighted more heavily than severity in the formula, which surprises most contractors. Three small claims of $3,000 each can hurt your mod more than one $5,000 claim. The formula penalizes you for having claims at all, not just for having big ones.
| Mod Range | What It Means | Premium Impact (on $20,000 base) |
|---|---|---|
| Below 0.85 | Better than average - strong safety record | Under $17,000 - you save |
| 0.85 - 1.00 | Good to average | $17,000 - $20,000 |
| 1.00 | Exactly average for your industry | $20,000 (no adjustment) |
| 1.01 - 1.25 | Worse than average - claims history costing you | $20,200 - $25,000 |
| Above 1.25 | High risk - non-renewal territory for many carriers | $25,000+ and climbing |
New Businesses Start at 1.0
If your company is less than three years old, you don't have enough claims history for NCCI to calculate a mod. You default to 1.0 - the industry average. This is actually one of the better times to start building a safety culture, because those first three years of claims (or lack thereof) will define your mod going forward. A new contractor with zero claims in years one through three can earn a mod below 0.90 by year four.
The Real Cost of a High Mod in Florida
Beyond the premium hit, a high mod creates operational problems. Many commercial general contractors in Florida require subs to have a mod at or below 1.0 or 1.1 as a condition of being approved to work on their projects. A 1.4 mod can disqualify you from bidding government contracts and large commercial work. You're competing against contractors paying standard rates while you're paying 40% more - that's a margin problem on every bid you submit.
Standard carriers also non-renew high-mod risks regularly, particularly in Florida's difficult insurance market. Once non-renewed, finding admitted coverage gets hard fast. That's when contractors typically call us.
How to Find Your Current Mod
Your mod is listed on the declarations page of your current workers' comp policy. It's also on the NCCI experience rating worksheet that your carrier or broker should provide annually. If you've never seen your worksheet, ask for it - you're entitled to it. The worksheet shows the exact claims that went into the calculation and is worth reviewing for errors. NCCI makes mistakes, and disputed claims can sometimes be corrected through a formal review process.
Improving Your Mod Over Time
There's no shortcut. The mod improves as old high-claim years roll off the three-year window and cleaner years replace them. That takes time - typically three to five years of disciplined claims management. What you can do in the meantime:
- Implement a formal return-to-work program. Getting injured workers back to modified duty keeps claims costs down, which directly reduces what NCCI counts against you.
- Contest fraudulent or disputed claims immediately. Once a claim pays out, it's in your mod calculation permanently. Fighting a questionable claim early is far cheaper than absorbing it.
- Document safety programs. Carriers look at this at renewal. It won't lower your mod directly, but it keeps you in the market.
- Consider a PEO program while your mod improves. It's not a permanent solution, but it can keep you insured and working through the recovery period.
Frequently Asked Questions - Experience Mods
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Based on 3 years of claims (excludes most recent year)
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