One of the most frustrating conversations a broker can have with a client goes something like this: “We’ve done everything right. We invested in safety. We haven’t had a serious incident in years. So why are our Workers’ Comp premiums still through the roof?”
The answer, more often than not, comes down to three numbers: the experience modification rate, or mod score. Understanding how the mod works—and how to help clients navigate a bad one—is one of the most valuable services a Workers’ Comp broker can provide.
What Is the Experience Modification Rate?
The experience modification rate (EMR or “mod”) is a multiplier applied to a Workers’ Compensation premium that reflects a company’s actual claims history relative to businesses in the same industry with similar payroll. A mod of 1.0 is average. A mod above 1.0 means the company pays more than the base rate; below 1.0 means a discount.
The mod is calculated by the National Council on Compensation Insurance (NCCI) in most states, using three years of loss data—excluding the most recent policy year. That three-year window matters enormously, because a single bad year with large claims can elevate a mod for up to three years after the policy period closes.
How a Single Year Can Haunt a Business
Consider a landscaping company that ran clean for years and then had a serious injury claim in 2022—a worker who required surgery and six months of modified duty. That claim, even if it cost $80,000 total, can dramatically spike the company’s mod in 2024 and 2026 as it cycles through the three-year calculation window.
The spike isn’t just painful financially. High mods can trigger:
- Non-renewal from carriers who set mod thresholds (commonly 1.25 or 1.5) for eligibility
- Declinations from new carriers during remarketing
- Assignment to the residual market or the state-assigned risk pool
- Contract disqualification for clients who bid on government or commercial construction projects requiring a mod below 1.0
For businesses where WC eligibility is tied to their ability to win contracts, a high mod can threaten the viability of the entire business.
What Drives the Mod Higher
The mod formula is not a simple average of claims costs. It weights frequency and primary losses more heavily than large individual claims. This means:
- Multiple small claims can hurt more than one large one
- Unreported minor injuries that fester into late claims are particularly damaging
- Claims that remain open and expensive at the evaluation date carry more weight than those that are closed with lower reserves
Open reserves are especially important. Brokers should work with clients to ensure that claims are actively managed and closed as quickly as appropriate—not left open with inflated reserves that continue to affect the mod year after year.
How Brokers Can Help Clients Manage Their Mod
There are concrete steps brokers can take to help clients with elevated mods:
- Request a mod worksheet review: Errors in the mod calculation happen. Payroll figures, claim amounts, and classification codes can be misreported. A formal audit of the worksheet can sometimes reveal correctable mistakes.
- Implement a return-to-work program: Modified duty reduces the indemnity component of claims, which directly reduces the experience data feeding the mod.
- Manage claims proactively: Partner with a TPA or adjust your client’s carrier relationship to ensure aggressive claims management and appropriate reserve setting.
- Document safety improvements: While safety investments don’t retroactively change the mod calculation, they influence carrier underwriting decisions and support renewal arguments.
- Explore alternative markets: Some carriers offer programs for clients with elevated mods who can demonstrate a credible improvement plan.
The Long View
The mod is a lagging indicator. It always reflects the past, not the present. A client who has genuinely improved their safety culture may be stuck with a high mod for years while the bad claims cycle out. Brokers who understand this can set appropriate expectations, advocate for their clients with underwriters, and help them stay in the voluntary market until their numbers improve.
Comp Central specializes in helping brokers find solutions for clients with challenging mod scores. Whether your client needs specialty market placement, a loss control plan, or claims advocacy support, we’re here to help.
Contact Comp Central to discuss strategies for clients dealing with high experience modification rates.
