Hello - I got two Master's Degrees from UW-Madison. I was an "in-state student".
That is what I know -
If you come to Wisconsin simply for pursuing your further education, you have to pay for the "out-of state" tuition not only the first year, but years of the entire program. For instance, if you are coming to Wisconsin to pursue your PhD, you will have to pay four years "out-of-state" tuition fees unless you receive some kinds of scholarships, fellowships, or graduate assistantships. You can check with the Office of Registrar via the Uw-Madison website.