What's a good price to charge for labor per square on a tear off & reshingle?

Your best bet is to call around and get some ideas from other companies, don't tell them who you are or what your doing of course, that will give you an idea of what's fair and then you can go from there.

Your local disposal rates will make a big difference.

For labor around here, they get 35 to 40 dollars a square to take off and another 35 to put new on. But so much as how many layers are on the roof, and more.