California worker compensation codes, often called class codes, are the foundation of how workers' comp premiums are calculated for employers in the state. Each industry role is assigned a numeric code that reflects its level of risk, and those codes determine the base rate insurers use to price coverage. In California, your premiums are also shaped by your experience modification rate (mod), claims history, and specific policy terms. This guide explains how California workers' compensation classification works in practice, how to verify codes, and how these pieces affect your premium and compliance.
California Worker Compensation Codes: A Clear Guide to Class Codes and Experience Ratings
