He worked in Adelaide for a time as merchant and Customs agent before returning to Angaston to become a junior partner in the firm of J.

[1] Hague believed in the personal interest of parents in the education of their children, and was involved in the Angaston School Board of Advice.

[1] In 1912 Hague was elected to the House of Assembly, where he represented the Barossa district for the Liberal Union, and held that seat until his death.

In a rearrangement of portfolios some time later Mr. Hague became Treasurer of South Australia, in succession to George Ritchie, and Minister of Railways, and he did much to secure the stability of the finances of the State during an extremely difficult period.

He opposed discriminatory measures against settlers of German origin during World War I, and was a supporter of Indigenous Australians.