Stoner made the announcement during the pre-event press conference at the French Grand Prix at Le Mans. The timing surprised everyone: Stoner was the reigning champion, having dominated the 2011 season for Honda with ten race wins and sealed the title at his home round at Phillip Island. He had begun the 2012 campaign with victories at Jerez and Estoril and was locked in a championship battle with Jorge Lorenzo at the midpoint of the season.
The stated reason was burnout. Stoner said he no longer enjoyed competing in the series, and that getting away from the political stress of MotoGP was a key factor in his decision. He also expressed a desire to spend more time with his family. In a June 2014 interview he confirmed he had no regrets, saying he was enjoying life away from the sport and dismissing any chance of a comeback.
The final season played out with a complicated arc. Stoner had four wins and appeared capable of challenging for the championship until a heavy crash during qualifying at the Indianapolis Grand Prix tore the ligaments in his ankle. He elected to have surgery, missing several subsequent rounds and effectively ending his title challenge. His priority then became being fit for his home race in Australia.
Stoner delivered a characteristically emphatic final chapter at Phillip Island. He won the Australian Grand Prix for the sixth consecutive season — an undefeated home record on Bridgestone tyres at the circuit — and then secured a podium at his final MotoGP race in Valencia. Six successive home wins at Phillip Island had been an extraordinary demonstration of his connection with that particular track, and winning every different Grand Prix circuit available to him during his career underscored the breadth of his talent.
Stoner had struggled with the MotoGP environment throughout his career. He was openly frustrated by what he considered unfair characterizations of his success: persistent suggestions that his Ducati's power advantage in 2007 rather than his skill had won the championship, and general skepticism about whether his speed was truly exceptional or merely machinery-dependent. This undercurrent of public doubt clearly wore on him.
He had also suffered from chronic fatigue syndrome — a condition later confirmed to have been present during his career, though only publicly disclosed in 2019 — and had severe anxiety and mental distress that he managed privately throughout his competitive years. He described lying on the motorhome floor between sessions in states of deep depression, and said the anxiety worsened on better weekends. The accumulated weight of these pressures, combined with the political dynamics of the MotoGP paddock, made withdrawal feel rational rather than premature.
Stoner retired with two MotoGP World Championships — 2007 with Ducati and 2011 with Honda — making him one of only a small number of riders to win titles with two different manufacturers in the premier class. His 2007 championship with Ducati remained the only one the Italian manufacturer claimed until Francesco Bagnaia's title in 2022, fifteen years later. He won 38 premier-class races and is the only rider to have dominated the Phillip Island circuit across the full 800cc era of MotoGP.
Following retirement, Stoner briefly competed in Australian V8 Supercars in 2013 before serving as a test and development rider for Honda through 2015. A one-off return to racing at the 2015 Suzuka 8 Hours ended with a crash caused by a mechanical throttle failure, injuring him and drawing a formal apology from Honda. He subsequently returned to Ducati as a test rider from 2016 to 2018. The FIM named him a Grand Prix Legend in October 2013, and he was inducted into the Sport Australia Hall of Fame in October 2015. Phillip Island's third corner was renamed Stoner Corner in his honor before his final Australian Grand Prix.