The tuition policy approved Thursday links tuition increases to inflation and other factors.
Students are guaranteed by state law to pay the tuition rate they paid in their freshman year throughout their undergraduate years. But the rate increases for most incoming classes.
This year, tuition increased 9.5 percent and led to complaints from some students and parents. The cost of tuition and housing for a typical undergraduate year at the Urbana-Champaign campus is more than $20,000.
Trustees on Thursday also raised the cost of a double dorm room in Urbana-Champaign 4 percent to $9,452 a year. Costs in Springfield and Chicago increased less sharply.