Durham, N.C. — Duke University's Board of Trustees on Friday approved a 4 percent increase in undergraduate tuition for the 2013-14 school year, officials said.

Annual tuition will rise to $44,020, and the total cost for the school year, including room, board and fees, will go to $58,278.

Tuition increases at Duke's graduate and professional schools range from 2 percent in the Sanford School of Public Policy to 4.9 percent in the School of Nursing.

Officials said they expect Duke to spend $127.9 million on undergraduate financial aid this year, which is up 7 percent from 2011-12. Estimates for next year's financial aid costs won't be finalized until packages for new and returning students are completed.

Duke has a need-blind admissions policy, under which the university accepts students without regard to their ability to pay for college and then meets 100 percent of their demonstrated financial need, officials said. More than half of Duke students receive some form of financial assistance from the university, including 40 percent who receive need-based financial aid.