The Workers’ Compensation Insurance Rating Bureau of California has submitted a September 1, 2026, pure premium rate filing to the California Insurance Commissioner proposing advisory pure premium rates that will be on average 10.4% above the average approved September 1, 2025 advisory pure premium rates.

The WCIRB’s proposed advisory pure premium rates are based on insurer losses and loss adjustment expenses incurred during accident years 2025 and prior. According to the WCIRB, drivers of the change include increased frequency of cumulative trauma claims as well as higher medical costs and allocated loss adjustment expenses.

Once the CDI schedules a public hearing to consider the filing, a public hearing will be scheduled.