A youth product for Mohun Bagan, Mahato was included in the club's first-team after injuries to regular starting players Subhasish Bose and Raynier Fernandes.[2] He made his professional debut for the club on 1 April 2017 against Bengaluru FC. He came on as an 89th-minute substitute for Souvik Chakraborty as Mohun Bagan won 3–0.[3]
On 3 September 2018, derby debutant Mahato scored his maiden goal against East Bengal and also became the man of the match.[4] On 18 October, against Mohammedan Sporting, Pintu scored an 89th Minute winner and also became the Man of the Match.
Rajasthan United
In July 2022, I-League outfit Rajasthan United completed the permanent signing of Mahata on a two-year deal.[5]