But the Jamaican sprinter, who spoke ahead of his final race this season in the 100-meter dash at Friday's Van Damme Memorial in Brussels, said he still has plenty he wants to accomplish between now and his retirement.
That would include improving on his world record in the 200 meters, possibly winning a gold medal at the Commonwealth Games, and, of course, collecting more Olympic gold in Rio de Janeiro.
“So far, [it] is after the Olympics in Rio,” Bolt said of retirement. “I think if I am in great shape, I'll go there and do what I have to do. I think it will be a good time to retire on top.”
After three more wins in Moscow last month, Bolt is the most decorated athlete in world championship history, with eight gold and two silvers. He also has six Olympic gold medals, having won the 100, 200 and 400 relay in 2008 and 2012.
He holds the world records in all three events but feels he can improve on his time of 19.19 seconds in the 200. Also, between now and 2016, Bolt might give the Commonwealth Games a try.
“I have never been to Commonwealths and so it is always good to add to your collection of gold medals,” Bolt said.
Then in 2016 it might be the right time to retire -- presumably with more Olympic gold hanging around his neck.
“If I want to be among the greats of Ali and Pele and all these guys, I have to continue dominating until I retire,” Bolt said.