The new deal will keep the 29-year-old at Old Trafford until the summer of 2014.
“I am thoroughly enjoying my time at this great club,” Carrick said.
“There is a fantastic team spirit within the squad and I am pleased to have committed my future to United.”
“We are in a very good position at the moment and I am confident this team will be successful for many years to come.”
“I am delighted Michael has signed a new contract,” United boss Sir Alex Ferguson said.
“He has been outstanding since joining us from Tottenham in 2006. He is a true professional and it is great he has committed his future to the club.”
