Maity was elected as an MLA for the first time winning 2011 West Bengal Legislative Assembly election from Kanthi Uttar Assembly constituency representing the All India Trinamool Congress. She polled 91,528 votes and defeated her nearest rival, Chakradhar Maikap of the Communist Party of India (Marxist), by a margin of 7,955 votes.[4][5] She retained the Kanthi Uttar seat for the Trinamool Congress in the 2016 West Bengal Legislative Assembly election defeating the Communist Party's Chakradhar Maikap again, by a margin of 18,576 votes.[6][7]
In December 2020, ahead of the 2021 elections, she resigned from the Trinamool Congress Party following the resignation of rebel Trinamool Congress leader Suvendu Adhikari, and later joined the Bharatiya Janata Party along with him and three other MLAs.[8][9]