Bird started out karting in 2000 when he competed in the Super 1 National JICA Championship. He finished 20th in the standings before competing once again in 2001 to take 10th. He moved to the ICA South Garda Winter Cup and the Andrea Margutti Torphy in 2002 alongside the Super 1 National JICA Championship. Bird continued to kart throughout the early noughties before making the move to single seaters in 2004.
His debut was with Carlin Motorsport in the Formula BMW UK Championship. He finished 14th in the standings with 22 points and second in the rookie cup. He stayed in the championship for a second year where he took second in the championship with Fortec Motorsport where he racked up 218 points from 12 podiums, 6 wins and 9 pole positions. With the team, he headed to the Formula BMW World Final where he finished 4th.
Sam stuck with Fortec when he moved to Formula Renault 2.0 UK in 2006. He took seven podiums, of which 4 were wins and 7 podiums to take 4th in the standings. From there, Bird made his step into the Formula 3 world. He returned back to Carlin for the British Formula 3 Championship where for a third year, he took 4th in the standings. Alongside this, he competed with the team in the Macau Grand Prix where he finished 6th and the Masters of Formula 3 where he finished 27th. In 2007, he returned to the latter with Manor Motorsport where he placed 7th in the standings while retiring during the Macau Grand Prix due to an accident between Streit and himself. His main championship for 2008 was the Formula 3 Euro Series where he took 2 podiums and 11th in the standing. Bird stuck with the Euro series for 2009 but made the move to Mücke Motorsport where he also competed in the Masters of Formula 3 once more. He placed 8th in both. Sam also returned to the British Formula 3 Championship for two races as a guest driver where he drove with Fortec. He also returned to Macau for his third year with ART Grand Prix, having a much more successful year to take 3rd.
Between 2009 and 2010, Sam made his debut in to GP2 when he stayed with ART Grand Prix to compete in the Asia Series of GP2. Out of 8 races, he took 12 points and a podium to finish 7th in the standings. He stuck with the team in to 2010 when he raced full time in the GP2 Series. He took 5 podiums of which 1 was a win, alongside 4 fastest laps to rack up 48 points and 5th in the standings. He made a return in 2011 to both the GP2 and the GP2 Asia Series with iSport International. Sam raced in four races during the Asia Series to take 2 points and 12th in the standings while he raced in 18 races of GP2 to take 45 points and 6th in the standing. As well as 6th, he took 3 podiums.
Bird stopped competing in GP2 in 2012 and moved to the Formula Renault 3.5 Series with ISR Racing. He took 7 podiums of which 2 were wins to collect 177 points and 3rd in the standings behind fellow Formula E driver Robin Frijns and Jules Bianchi. Sam also made his debut in Formula One with Mercedes AMG Petronas as a test driver. He made a return to the GP2 Series in 2013 with Russian Time where he completed his season as runner up with 181 points, 6 podiums of which 5 were wins, 2 poles and 3 fastest laps.
2014 was a change of pace for Bird as he competed in four new championships. He joined AF Corse for three of them; the FIA World Endurance Championship GT Cup where he finished 34th, the FIA World Endurance Championship LMGTE Am where he finished 16th with two pole positions and the 24 Hours of Le Man LMGTE Am where he didn’t finish the race. He returned to the 24 Hours of Le Mans in the LMP2 with G-Drive Racing in 2015 where he finished 3rd alongside his season in the FIA World Endurance Championship LMP2 with the team where he finished first in the standings with 178 points. Bird stayed with both championships but made the move to AF Corse to compete in the LMGTE Pro segment yet managed to not finish Le Mans. Although, he did finish 2nd in the Endurance Championship. He repeated 2016 with the same team in the exact same championship for 2017 and took 5th in both. Alongside that, he entered the WeatherTech SportsCar Championship GTD with Scuderia Corsa for the first time and finished 74th.
Bird remained in the WeatherTech Championship with Scuderia Corsa for 2018 for a single race where he finished 51st and returned to AF Corse for the 24 Hours of Le Mans LMGTE Pro where he finished 9th. Sam stayed with AF between 2018 and 2019 to compete in 8 races of the FIA World Endurance Championship LMGTE Pro to take 12th with 54.5 points. 2019 saw a change in pace as he stuck with the team but moved to the Blancpain GT Series Endurance Cup. He also compete in Le Mans again but did not finish. Aside from that, he joined Ferrari to race in the Intercontinental GT Challenge but retired from the race.
Sam Bird made his FIA Formula E debut in the 2014-15 season with Virgin Racing where he took two wins, 3 podiums and 103 points to place him 5th in the standings. He stuck with the team for the 2015-16 season when they made the name change to DS Virgin Racing. Bird took one win and two podiums to place 4th in the standings. During his third year, the 2016-17 season, he placed 4th in the standings once again but took 2 wins and 4 podiums. In 2017-18, Bird took another two wins and 6 podiums to place himself third in the standings with 143 points, his highest placing in FE. For this third year in the sport. for the 2018-19 season, the team changed to Envision Virgin Racing and Sam stuck with the team for a fifth year where he took 85 points and 9th in the standings with a single win and 2 podiums.