Commercial auto insurance covers vehicles used for business purposes like transporting goods, people, or equipment. It provides similar coverage to personal auto insurance but with higher liability limits and additional optional coverage. The cost of commercial auto insurance depends on factors like the number of vehicles and employees, their driving histories, how and where the vehicles are used, and what is transported. Rates can range from $1,200-$2,400 for passenger vehicles, $5,000-$10,000 for taxis/livery, and over $2,500 for tractor-trailers depending on these risk factors.