10% Rate Hike & SIBTF Eligibility Reforms Explained

California workers’ compensation rates are set to rise for policies effective September 1, 2026, after the WCIRB initially filed for a 10.4% average increase in advisory pure premium rates. Regulators approved a 6.6% benchmark, but the filing cited higher projected claim costs and medical inflation. The story also says SB 171 tightens eligibility for the Subsequent Injuries Benefits Trust Fund and adds stricter documentation rules for claims on or after January 1, 2026.