Liberty Mutual submitted a rate and rule update for its Certainly personal auto program in Wisconsin, with effective dates of March 23, 2026, for new business and May 27, 2026, for renewals.

The filing introduces billing method factors for options such as EFT, payroll deduction, and recurring card payments, aligning the program with sister companies Liberty Mutual and Peerless Indemnity. Installment fees are waived for customers using payroll deduction.

The update affects 838 policyholders. The last rate change for the program was a 9.9% decrease effective October 2024.

As background, Liberty Mutual submitted a neutral rate filing in Arizona in December 2025, covering 1,671 personal auto policyholders and $1.43 million in premium, with no impact to existing rates.