Raised in Aurskog, Hauger began karting at the age of five and won his first race at eight. He accumulated podiums in 62 of 70 national races before moving to international competition in 2014. His international karting record included ROK International Mini category honours and multiple titles in 2015 across the Vega Winter Trophy, the Italian CSAI Karting Championship, and the WSK Champions Cup and Super Masters competitions. He won the Deutsches Kart Meisterschaft (DKM) Junior class in 2016, reportedly becoming the youngest champion in that event's history, and the senior DKM title in 2017.
Hauger moved to cars with TRS Arden in the 2018 F4 British Championship, finishing fourth with four victories. In 2019 he joined Van Amersfoort Racing for a double F4 campaign. In the ADAC F4 series he finished second, six wins to Théo Pourchaire's championship total, losing the title by seven points. In the Italian F4 Championship he was dominant, taking twelve wins including a sweep at Monza and beating Ferrari and Mercedes junior programme drivers by over 130 points to win the championship. VAR won the teams' title. He also made two guest appearances in Euroformula Open at Silverstone in 2019, finishing sixth and fifth as a replacement for Liam Lawson.
In 2020 Hauger raced in FIA Formula 3 with Hitech Grand Prix alongside Liam Lawson and Max Fewtrell, scoring 14 points for seventeenth in the standings. He also ran in Formula Regional European Championship that season with VAR, winning once and finishing seventh.
In 2021 Hauger graduated to Prema Racing in FIA Formula 3, alongside Olli Caldwell and Arthur Leclerc. The campaign was dominant: four wins and 205 points. He took his first pole position at Barcelona and won that round's third race, won from twelfth on the grid at the Red Bull Ring, won a wet race at the Hungaroring, and clinched the championship at Sochi with two rounds remaining. He joined the Red Bull Junior Team and was confirmed as an official Red Bull reserve driver for 2023.
Hauger spent three seasons in FIA Formula 2. In 2022 at Prema alongside Jehan Daruvala he scored 115 points in tenth position, taking wins at Monaco sprint (lights to flag) and Baku feature (inherited after a rival crash) with four podiums total. In 2023 with MP Motorsport he scored 113 points for eighth, with wins in the Melbourne sprint from reverse-grid pole and the Hungary sprint, and narrowly missed a Macau Grand Prix win after a late call-up to replace injured Franco Colapinto — finishing second. In 2024, again with MP Motorsport alongside Colapinto, he scored 85.5 points for eleventh, with a Jeddah sprint victory upgraded from second after a disqualification, and pole position at Melbourne. He departed the Red Bull programme after the 2023 season.
For 2025 Hauger joined Andretti Global in the Indy NXT Series, IndyCar's primary feeder series. He was dominant throughout the season, winning six races, taking eight poles, and accumulating 599 points to claim the championship. He was also named Rookie of the Year. His St. Petersburg and Barber performances were particularly commanding — pole and lights-to-flag in both.
In September 2025, following his Indy NXT title, Hauger was confirmed at Dale Coyne Racing in the No. 19 car for the 2026 IndyCar season. His debut at St. Petersburg saw him qualify third, making the Fast Six in his first IndyCar qualifying session. If he completes an IndyCar race, he will become the first Norwegian driver to do so since Gil Andersen, who raced from 1911 to 1916 — a gap of over 109 years.
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