Experience Rating
The system of adjusting workers compensation premiums based on an employer's historical loss experience relative to similar employers in the same class.
What It Is
Experience rating is the actuarial process used to adjust workers compensation premiums based on an individual employer's historical loss experience compared to the average experience for employers in the same classification and of similar size. The output of experience rating is the Experience Modification Rate (EMR).
The experience rating system uses three years of payroll and loss data, excluding the most recent completed year (to allow time for claims to develop). It compares the employer's actual losses to the expected losses for their classification and payroll, producing a modification factor that increases or decreases the manual premium.
Experience rating applies only to employers whose premium volume exceeds a minimum threshold set by the rating bureau (typically around $5,000-$10,000 in annual premium, varying by state). Smaller employers are not experience rated and pay the manual rate without modification.
Why It Matters for Brokers
Experience rating is the single largest variable factor in workers compensation pricing. Brokers who understand the mechanics of experience rating can identify errors in the mod calculation, advise clients on claim management strategies to improve the mod, and explain the financial impact of workplace injuries in terms the client can understand. A broker who can help reduce a client's EMR from 1.20 to 0.95 delivers tangible, measurable premium savings.
Real-World Example
An HVAC company with $1.2M in payroll has an EMR of 1.18 due to three moderate claims in the experience period. The broker reviews the NCCI experience rating worksheet and discovers that one $45,000 claim was a medical-only claim incorrectly reported as an indemnity (lost-time) claim. Medical-only claims are weighted at 30% of their value in the formula, while indemnity claims count at full value. Correcting this single classification error reduces the EMR from 1.18 to 1.06, saving the client $7,200 in annual premium ($1.2M x class rate x 0.12 difference).
Common Mistakes
- 1Not reviewing the experience rating worksheet for errors in claim amounts, claim types (medical-only vs. indemnity), or payroll figures.
- 2Failing to explain to clients how individual claims affect the EMR so they understand the financial incentive for safety programs.
- 3Not filing disputes with NCCI or the state bureau when the experience rating worksheet contains incorrect data.
How brokerageaudit.com Handles This
Policy Checker tracks the EMR across policy years and displays the trend. It flags significant EMR changes and prompts the broker to review the underlying worksheet. Submission Intake captures historical EMR data and loss runs to support experience rating analysis during the quoting process.