Tim started his karting career at the age of 10 but made his single-seater racing debut in the 2020 ADAC Formula 4 Championship. That year, he ended up fourth in the overall championship, scoring six podiums and one win in the final event of the season at Oschersleben. In 2021, he continued to race in Formula 4, adding a second program in the Italian championship alongside the one in the German series. He claimed the runner-up position in both competitions with five wins and five poles in the German Championship, plus four wins and a pole in the Italian Championship. In the ADAC series, prevailed at Hockenheim, Sachsenring, and Nurburgring, adding more wins at Paul Ricard and Red Bull Ring in the Italian Championship.