Jason Kubler mainly plays on the ATP Challenger Tour and the ITF Future Tour . So far he has celebrated ten single and four double victories on the Future Tour. On the Challenger Tour, he has won the individual tournament in Sibiu in 2014. After undergoing surgery for the sixth time in 2016 due to persistent knee problems, he did not play a tournament for over a year. In 2017 he celebrated his comeback on the professional tour and initially played a few tournaments on the Future Tour. In his first Challenger appearance since his return to Traralgon , he was able to play his way through to the final as a qualifier and beat his compatriot Alex Bolt in three sets.
On August 25, 2014, he broke through the top 200 in the world rankings for the first time and his highest ranking was 91st in October 2018.