Singh Roy studied at the Hindu School and the Presidency University, Kolkata, and received a Bachelor and Master of Laws from the Law College Kolkata.
[citation needed] In 1921 Roy was elected to the Bengal Legislative Council in British India and was Minister of Local Self-Government in 1930.
[2] Singh Roy was Sheriff of Calcutta and from 1937 to 1941 in the cabinet of AK Fazlul Huq with responsibility for the Treasury in Bengal.
[7] After the first India-Pakistan war, on 6 July 1950 he gave a speech on All India Radio covering an Indo-Pakistani agreement.
[8] From 1958 to 1959, Singh Roy was Chairman of the Federation of Indian Chambers of Commerce and Industry (FICCI).