The WCIRB develops advisory pure premium rates for workers’ compensation insurance, and rules and regulations with respect to the California Experience Rating Plan, subject to the approval of the Insurance Commissioner.
In conjunction with the ratemaking activities, the WCIRB collects premium, payroll and loss information incurred on all workers’ compensation policies that provide California coverage.
The individual data collected for each employer is further compared to other employers in California based on the primary class code, and the Experience Rating formulas produce either a surcharge or a discount to the final rates provided by Workers’ Comp carriers.
An excellent resource for understanding your Experience Rating form is provided on the WCIRB website here.
Employers may request a copy of their individual Experience Rating form here. At the bottom of this page, you can click the link to complete the online request.