Beaumont was initially reluctant to enter parliament. However at the first general election of 1701 he allowed himself to be put forward for Oxford University by a group of younger dons. He withdrew before the poll, but when a vacancy arrived shortly afterwards in March he was re-adopted and stood at the by-election. Although defeated, he succeeded in attracting a respectable following. At the second 1701 election he campaigned with a fellow Tory, John Verney, for Leicestershire but stood down before the poll. At the 1702 English general election, he was selected to stand for Leicester and was returned as Member of Parliament in a contest. He was re-elected at the 1705 English general election, and was returned unopposed in 1708 and 1710. In 1712, he was appointed a Commissioner of the Privy Seal. He was returned unopposed for Leicester at the 1713 general election and in 1714 was appointed a Lord of the Admiralty, a post he held only for six months.[3] He was returned again as MP for Leicester in 1715, 1722, 1727 and 1734.[4]