Angus also played a role in maintaining the close relationship between the CPR and the Bank of Montreal, whose growth in the Canadian West ran side by side that of the railway. In 1891, he returned to the bank as a director, and after the death of Sir George Alexander Drummond, he was elected as the bank's president from 1910 to 1913, when he was succeeded by his son-in-law's brother, Sir Vincent Meredith. By 1912, Angus was one of the bank's largest shareholders, and after retiring as president, he remained a director until his death.