Do I Need Car Insurance To Rent A Car In Montana? 
The Laws in Montana are Different Brandon . You must have your own insurance policy even if it is a non owned policy . The rental companies will sell you insurance but is for the comp and collision portion . I insuremany rental car business across the state and none of them will rent you a car unless you have at least liability on your own . Yes you can purchase insurance from that does include liability and comp and collision . We always recommend you purchase from a rental company the coverage they offer that way in the event of a claim it does n't effect your personal auto insurance . 