Hales was the head of the junior branch of a Jacobite family, but he himself was a staunch Whig. After representing his county from 1701-5, he declined an invitation from the Kent Whigs to contest it again in 1715, thenceforth sitting for Canterbury, near which he had an estate. Appointed one of the commissioners for forfeited estates, with a salary of £1,000 a year, he consistently supported the Administration, except in 1719, when he voted against the peerage bill.
In 1732 Hales, as a former commissioner for forfeited estates, became involved in the Derwentwater scandal.
In 1734 Hales, who had voted for the excise bill despite representations made to him by the Canterbury corporation, was defeated at the poll but was seated on petition. He was again defeated in 1741, remaining out of Parliament till 1746, when he was returned at a by-election, again supporting the Administration. Defeated for the last time in 1747, he died 7 Jan. 1748.
