The 'Live Like You Were Dying' singer stopped by The Ellen DeGeneres Show this week and explained what led him to get sober five years ago.
"I think it's a personal choice - when it gets to the point where you think it's affecting you adversely and it's affecting your relationships, it's time to make a change," McGraw said. "I thought it was [time]."
He further commented: "I also thought my girls are getting older and I certainly wanted to have some good, solid ground to stand on when I started talking to them about their situations."
McGraw went on to stress that he felt the mature thing to do was to put his boozing days behind him.
"I felt like it was time to grow up a little bit for me. Things weren't going the way I wanted them to," he said.
[Tim McGraw and Faith Hill]
McGraw is married to singer Faith Hill and has three daughters, Grace, Maggie and Audrey.
The singer - who has sold 40 million albums in the US - is currently on the media circuit promoting his 12th record Two Lanes of Freedom.
McGraw's interview on The Ellen DeGeneres Show airs today (February 5).
Watch Tim McGraw's 'Live Like You Were Dying' music video below: