Students who attend the 26 campuses of the University of Wisconsin System will pay hundreds of dollars more in tuition this fall ? ranging from $235 more a year at UW Colleges to $659 more a year at UW-Madison. On a vote of 11 to 4, the UW Board of Regents approved a 5.5 percent tuition increase for in-state students at a meeting Thursday in Madison. Tuition will cost an average of $6,543 a year for resident students attending a four-year UW System campus in 2011-12. That?s an average increase of $381 per year. Out-of-state students will pay increases at the same dollar amount as residents.