[1] Sen was born in a Zamindar family of Alampur village in Bardhaman district in British India.
In 1916–17, he was elected Chairman of the Reception Committee of the session of the Indian national Congress held in Kolkata.
[2][4] Sen became the first unofficial Indian chairman of Berhampore Municipality, the then Murshidabad District Board which was established by Montagu–Chelmsford Reforms.
[5][1] Baikunthanath invested money to established Bengal Pottery Works along with Raja Manindra Chandra Nandy.
[3] In 1920, Sen was appointed a Companion of the Order of the Indian Empire (CIE) and became Roy Bahadur.