Southern Farm Bureau Casualty Insurance Company filed to introduce a new Commercial Auto insurance program in Mississippi on January 21, 2026. The program applies to new business and renewals beginning March 1, 2026, and marks a structural shift in how the company prices and administers commercial auto coverage.

The new program adopts ISO commercial auto rules and loss costs, replacing the company’s prior internal approach. To manage volatility associated with the transition, Southern Farm Bureau is implementing a rate cap of plus or minus 10%, limiting sharp premium swings that can result from moving to ISO based rating. The filing estimates an overall rate effect of negative 3.5% for this change.

The launch is also tied to a broader technology overhaul. Southern Farm Bureau disclosed that it is rolling out a new policy and billing system, with commercial auto business expected to migrate gradually from the legacy platform. As part of the program design, the insurer is introducing an Ag Promise Companion Policy Discount of 34.9% for members who maintain an active Ag Promise policy, reinforcing its bundling strategy across farm and commercial lines.

The filing relies on ISO loss costs referenced as CA-2021-BRLA1, with Willis Towers Watson and Martin and Company authorized to submit the materials on the insurer’s behalf. However, the company flagged a key limitation: due to programming constraints, it has not been able to automatically adopt updated ISO loss costs in recent years. To address loss cost changes missed since 2021, the filing applies a 28.6% modification to current ISO loss costs.