Experience Modification Factor
An Experience Modification Factor (Experience Mod) is a numerical rating factor that compares a company’s workers’ compensation claim history to other businesses in the same industry of similar size. It directly impacts how much an employer pays for workers’ compensation insurance premiums.
Experience Mod and Your Business
Your Experience Modification Factor represents how your company manages workplace risk compared to other businesses in your industry. It measures your actual workers’ compensation losses against what is considered the expected losses of similarly sized companies.
An Experience Mod above 1.0 suggests that your organization has experienced more frequent or severe claims than others, which may indicate gaps in risk management or safety controls. Conversely, an Experience Mod below 1.0 indicates a better-than-average loss history and shows strong claims reporting and effective workplace safety practices.
Your Experience Modification Factor can also shape your company’s reputation with insurance carriers as it serves as an indicator of operational discipline and risk management performance.
Experience Mod Affects your Premium
The amount you pay for your workers’ compensation insurance is directly impacted by your Experience Mod. It serves as a multiplier applied to your base rate. An Experience Mod above 1.0 results in a debit and increases your premium, reflecting higher-than-expected losses. An Experience Mod below 1.0 generates a credit and decreases your premium, ultimately rewarding you for your effective claims reporting and workplace safety.
Because the calculation is typically based on a three-year rolling average (excluding the most recent policy year), past losses can impact a company’s costs for years. This makes risk management a great way to control long-term expenses.
Experience Mod in the Long Term
Ignoring your Experience Modification Factor can create lasting financial challenges for your business. Since the Experience Mod uses a three-year rolling average, poor claims performance can affect your workers’ compensation insurance premium for multiple years. This can increase insurance costs and strain your company’s budget.
From a safety perspective, a high Experience Mod can also signal workplace safety issues. This not only puts your employees at greater risk but can also damage your company’s reputation. Over time, failing to identify and address the root causes of claims (improper training, bad practices, poor safety controls, ineffective claim management) can lead to higher claim frequency and severity.
Summary
Managing your Experience Mod is essential because it directly influences your workers compensation premium and reflects the overall strength of your safety and claims practices. A lower factor results in reduced insurance costs, stronger financial performance, and a more favorable reputation with insurance carriers. Since the rating is based on three years of loss experience, consistent risk management, prompt claim reporting, and effective safety controls are the most reliable ways to keep your factor below 1.0 and maintain long term cost stability. By making your company more attractive to a wider group of carriers, a strong Experience Modification Factor places you in a more competitive position for lower rates.
If you would like to discuss your Experience Modification Factor, feel free to call us at 609, 586, 7474 ext. 272.
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About the Author:
Tim Flanagan is a Risk Management Associate at Rue Insurance since 2025. He is licensed in Life, Health, Property & Casualty for NJ. He concentrates his efforts in the manufacturing, chemicals, plastics, and rubber industry. He prides himself on positioning his efforts as an advisor for all of his clients.
