The Workers' Compensation Insurance Rating Bureau

The Workers' Compensation Insurance Rating Bureau of California is a nonprofit association with over 400 member companies, licensed to transact workers' compensation insurance. It serves as a licensed rating organization and designated statistical agent of the California Insurance Commissioner, providing workers' compensation information and statistics to various insurers. The association offers protection to businesses and employees from the financial impact of accidents and performs functions such as premium collection, policy document examination, insured business inspections, and test audits for insurance companies. It is a part of Environment Control Insurance and is based in San Francisco.