Workers’ Compensation Insurance Rating Bureau of California

The Workers’ Compensation Insurance Rating Bureau of California (aka ‘The WCIRB’, ‘The Rating Bureau’, or ‘The Bureau’) is an unincorporated, private, nonprofit association comprised of all companies licensed to transact workers’ compensation insurance in California.  They are the regulatory body for workers’ comp in the State of California as authorized by the California Insurance Commissioner.

The WCIRB performs a number of functions including the collection of premium and loss data, examination of policy documents, inspections and classifications of insured businesses for classification purposes, and testing audits of insurer payroll audits and claims classification.

Uniform Statistical Reporting Plan (USRP)

All California businesses are classified using the Standard Classification System found in Part 3 of the California Workers’ Compensation Uniform Statistical Reporting Plan – 1995. The Uniform Statistical Reporting Plan (USRP) is part of the California Code of Regulations and is approved by the Insurance Commissioner. The Standard Classification System, which contains approximately 500 industry classifications, describes groups of employers whose businesses are relatively similar. Each classification reflects the type of operations common to that group of employers.

California Workers’ Compensation Coverage

Business owners may wish to verify Workers’ Compensation Coverage on Independent Contractors and Subcontractors.

Contractors State License Board (CSLB)

Check a Contractor License or Home Improvement Salesperson (HIS) Registration

The Contractors State License Board (CSLB) licenses and regulates California’s construction industry.  On this Web site you can check the status of a contractor’s license which can affect your business in an audit.  In addition to the license number, the site will show whether the license is active, the classification of license held, contractor’s bond and workers’ compensation coverage information.

California Labor Code

California Labor Code provides many definitions directly relating to Employers and Employees.  This link provides the code language for references.

Employment Status

Employment status questions may be referenced through your local state’s Employment Development Department Agency or the IRS:

CA Department of Industrial Relations

National Council on Compensation Insurance

A.M. Best Co., Inc.

California Labor Code

California Department of Insurance

California Department of Insurance – Fraud Division

Insurance Services Organization (ISO)


National Society of Insurance Premium Auditors

California Workers’ Compensation Coverage Inquiry

Contact us for answers to additional questions –