The eldest of 4 siblings, he grew up in the London Fields neighbourhood of Hackney, attending Gayhurst primary school.

[11] In 2009, Tao attended the launch of Team Sky, joining an amateur peloton riding behind Bradley Wiggins and Chris Froome.

[24] He also took a clean sweep of mountains, points and general classification jerseys at the Giro Internazionale della Lunigiana in 2013.

[2] He was named in Scotland's Commonwealth Games teams for both Glasgow 2014 and Gold Coast 2018, but was unable to fit the competition into his race schedule on either occasion; he hoped to make the squad for Birmingham 2022 but was not selected.

Following in the steps of previous winners Marco Pantani and Mikel Landa, Geoghegan Hart rode away from the remaining peloton with the Sunweb duo of Jai Hindley and Wilco Kelderman, out-sprinting Kelderman at the line to take the stage win.

[10] Geoghegan Hart had a few tough seasons after his Giro d'Italia win in 2020 having to deal with COVID and repeated infections afterwards.

[37] Going into the 2023 Giro d'Italia, Geoghegan Hart was designated as co-leader for Ineos Grenadiers alongside Geraint Thomas.

[38] However, a fractured hip sustained in a crash on Stage 11 required surgery, forcing him to withdraw from the race and ultimately ruling him out for the remainder of the 2023 season.

[39][40] In August 2023, it was announced that Geoghegan Hart would leave INEOS Grenadiers, having signed a three-year contract with Lidl–Trek.