Requiring that experience-rated group disability income insurers include all applicable rating factors and credibility formulas in rate manual filings with the insurance commissioner.

SB 5141 requires Washington's experience-rated group disability insurers to include all applicable rating factors and credibility formulas in their rate filings with the insurance commissioner. This directly affects insurers selling group disability plans where premiums are based on a specific group's historical claims data. The law mandates detailed filings so the commissioner can verify if a group's claims experience is credible and replicate premium calculations using that group's data. It aims to increase transparency in how these rates are determined. The bill became law on April 8, 2025, and takes effect July 27, 2025.