Auto-Owners Insurance Company and Home-Owners Insurance Company, both domiciled in Michigan, have filed a Workers Compensation rate update in their home state, effective January 1, 2026, for both new and renewal business. The filing, covering 11,757 policyholders and $26.4 million in written premium, carries a neutral overall rate impact (0.000%).

The submission updates the Experience Rating Plan Manual through revisions to class codes, Expected Loss Ratios (ELRs), and D Ratios, in accordance with the Compensation Advisory Organization of Michigan (CAOM). Despite significant indicated changes to certain factors (as large as -49.9% and -42.9%), the overall impact to policyholders is neutral, with potential variation limited to ±10%.

The filing details procedures for payroll estimation, audit adjustments, and final premium determination, maintaining consistency with CAOM standards for multi-state operations and minimum premium policies. The companies report no premium change or prior rate movement since their last filing, effective December 18, 2025.