Being advised by Sir Ashutosh Mukherjee, he joined the bar council of the Calcutta High Court and started legal practice. He practised in the Calcutta High Court for 40 years. Legislator and Indian independence movement Huq became secretary of the Bengal Provincial Muslim League in 1913. After the First Partition of Bengal, Huq attended the All India Muhammadan Educational Conference hosted by Sir Khwaja Salimullah in Dacca, the capital of Eastern Bengal and Assam. The conference led to the formation of the All India Muslim League. The annulment of the partition led to the formation of the Bengal Provincial Muslim League, in which Huq became secretary. With the patronage of Sir Salimullah and Syed Nawab Ali Chowdhury, he was elected to the Bengal Legislative Council from the Dacca Division in 1913. In 1916, Huq was elected president of the All India Muslim League. Huq was one of those who was instrumental behind formulating the Lucknow Pact of 1916 between the Indian National Congress and the Muslim League. In 1917 Huq was a Joint Secretary of the Indian National Congress and from 1918 to 1919 he served as the organisation's General Secretary. He was the only person to concurrently hold the presidency of the League and the General Secretary's position in the Congress. In 1918, Huq presided over the Delhi Session of the All India Muslim League. In 1919, Huq was chosen as a member of the Punjab Enquiry Committee along with Motilal Nehru, Chittaranjan Das and other prominent leaders which was set up by the Indian National Congress to investigate the Amritsar massacre. Huq was the president of the Midnapore Session of the Bengal Provincial Conference in 1920. During the Khilafat movement, Huq led the pro-British faction within the Bengal Provincial Muslim League, while his rival Maniruzzaman Islamabadi led the pro-Ottoman faction. Huq also differed with the Congress leadership during its non-cooperation movement. Huq favoured working within the constitutional framework rather than boycotting legislatures and colleges. He later resigned from the Congress. In 1923, Huq served as education minister of Bengal for six months under the dyarchy system. In 1929, he founded the All Bengal Tenants Association, which evolved into a political platform, including as a part of the post-partition United Front. Prime Minister of Bengal First Premiership (1937-1941) The dyarchy was replaced by provincial autonomy in 1935, with the first general elections held in 1937. Huq transformed the All