Depends on what your GCWR is on your truck and the length of the trailer if you go over weight and length in your state you may need a commercial liscence, but you can usually go as much as your truck can haul without a commercial liscence. I know some 3/4 ton and 1 ton trucks can haul up to 18,000 pounds but if the length is to long you need a class A or B liscence.