this again?
liability insurance, workman's comp (state specific, may not be required), commercial auto coverage (for your truck and trailer, commercial policies are not cheap and not like homeowners), licenses, permits, fees and fees and fees. In colorado (although no place else), you are required to get SMM plates for your self-propelledmachinery used commercially (i.e. tractor) (big bucks, total ripoff). You are now a commercial vehicle, you need to follow all DOT regulations, in many states you need a DOT number (and all that that implies)., inspections, etc.
Oh, and somewhere in here, you're supposed to make money for yourself.
I, like FWJ's friend, have also started calling in illegally operating contractors. Either play by the rules, or get out. It's simply not fair or reasonable to those of us burdened with paying all these taxes/fees/permits, trying to play by the rules and make a living at it while Mr illegal contractor undercuts all the prices because he/she has no costs.
If you don't know what to charge, then you don't know what your costs are.