How much does a fulltime licensed Master Plumber make in Houston TX?

Working alone a master plumber should net no less than $240,000 per yr.

It also has a lot to do which state they hold a master's license in as many master plumbers do not have the proper formal training and thus they will be hindered in making the average $250 per hr +

If they hire journeymen then over 5 million a year is not uncommon