Class Rating
A rating method that assigns premium rates based on the insured's industry classification code rather than individual risk characteristics.
What It Is
Class rating assigns insurance rates based on the insured's classification into a group of similar risks that share common characteristics and expected loss patterns. Rather than underwriting each risk from scratch, class rating uses historical loss data for the entire class to establish a base rate that applies to all members of that class. Individual risk modifications like experience rating and schedule credits then adjust the class rate up or down.
Classification systems vary by line of business. Workers compensation uses NCCI class codes (or state-specific equivalents) based on the type of work performed, such as code 5403 for carpentry or 8810 for clerical. General liability uses ISO Commercial General Liability classification codes. Commercial property uses construction type, occupancy, protection class, and external exposure (COPE). Commercial auto classifies by vehicle type, use, radius, and driver age.
Correct classification is critical because rates can vary dramatically between closely related codes. In workers comp, a carpentry contractor (5403) might pay $8.50 per $100 of payroll while a cabinet manufacturer (2812) pays $4.20. Misclassification can result in either overpayment or underpayment, with underpayment typically caught at audit and resulting in large additional premium charges.
Why It Matters for Brokers
Proper classification is a fundamental broker responsibility because incorrect codes directly cause either overcharges or undercharges. Brokers who carefully evaluate the insured's operations and match them to the most accurate and favorable classification code provide immediate premium value. Classification disputes are among the most common premium-related issues brokers help clients resolve.
Real-World Example
A building maintenance company is classified under workers comp code 9014 (building maintenance) at $5.75 per $100 of payroll, generating a $57,500 premium on $1M payroll. The broker reviews the company's operations and determines that 60% of payroll is for janitorial work, which falls under code 9008 at $3.90 per $100. Properly splitting the classifications saves the client $11,100: ($600K x 0.039) + ($400K x 0.0575) = $23,400 + $23,000 = $46,400 versus the original $57,500.
Common Mistakes
- 1Accepting the carrier's initial classification without verifying it against the insured's actual operations, potentially missing a more favorable code.
- 2Using the broadest classification for all employees when splitting payroll across specific codes would more accurately reflect the risk and reduce premium.
How brokerageaudit.com Handles This
brokerageaudit.com's Submission Intake module suggests appropriate classification codes based on the insured's described operations and industry, referencing NCCI and ISO classification guides. The system flags when a carrier's assigned code differs from the expected code, prompting brokers to investigate and potentially reclassify for premium savings.