CHAPEL HILL, N.C. ? North Carolina basketball coach Roy Williams has agreed to a four-year contract extension through the 2014-2015 season.

Williams, who will be inducted into the Naismith Memorial Basketball Hall of Fame in September, recently completed his fourth season as head coach of the Tar Heels after spending 15 years at Kansas University. He has a 106-30 record at Carolina and a 524-131 record in 19 seasons overall.

Williams originally signed an eight-year deal that began in 2003-04. The new contract terms include an annual base salary of $325,000 and $30,000 for expenses, plus supplemental income paid by the university that will range from $1.2 million to $1.5 million per year.

It also includes bonuses for qualifying for and advancing through the NCAA Tournament and for graduation rates that meet or exceed the overall student body.

“The confidence chancellor (James) Moeser and (athletic director) Dick Baddour have shown in me by offering this extension is flattering,” Williams said. “I am excited about coaching at Carolina and look forward to these next eight years. I am past the point in my career where people refer to ‘that young coach Roy Williams,’ but I know I can go this long. I just hope my players can put up with me.”

Williams won his 500th game Dec. 9, 2006, reaching 500 wins in fewer seasons than any coach in the history. He is one of four coaches in history with a winning percentage of 80 percent or better (with Clair Bee, Adolph Rupp and John Wooden) and is the only coach in history to have won at least one game in 18 consecutive NCAA Tournaments.

The 1972 Carolina graduate led the Tar Heels to the NCAA championship in 2005. He has directed teams to five Final Fours, 11 regular-season conference championships and five conference tournament titles.