Whether you need to buy a business auto insurance policy will depend on the kind of driving you do. A good insurance agent will ask you many details about how you use vehicles in your business, who will be driving them and whether employees, if you have them, are likely to be driving their own cars for your business.
While the major coverages are the same, a business auto policy differs from a personal auto policy in many technical respects. Ask your insurance agent to explain all the differences and options.
If you have a personal umbrella liability policy, there's generally an exclusion for business-related liability. Make sure you have sufficient auto liability coverage.
Be on the safe side ... allow our office to do a no-obligation review of your insurance needs.