Anyone who has owned a vehicle has had to set up an insurance policy for their vehicle. Shopping rates against any requirements your bank may have can be done either individually or through the use of a fiduciary. This will ensure you have the right coverage for the insurance needs you have. Looking at how to calculate the difference between the risk of having just liability-only insurance vs. comprehensive will help you to make an informed decision. Whether you choose one or the other is less important than you making sure that you have a current policy on your vehicle.