The Parliamentary Secretary to the Treasury is the official title of the most senior whip of the governing party in the Parliament of the United Kingdom. Today, any official links between the Treasury and this office are nominal and the title of the office can be seen as a sinecure that allows the incumbent to draw a Government salary, attend Cabinet, and use a Downing Street residence, traditionally 12 Downing Street.

His Majesty's Treasury, occasionally referred to as the Exchequer, or more informally the Treasury, is a ministerial department of the Government of the United Kingdom. It is responsible for developing and executing the government's public finance policy and economic policy. The Treasury maintains the Online System for Central Accounting and Reporting, the replacement for the Combined Online Information System, which itemises departmental spending under thousands of category headings, and from which the Whole of Government Accounts annual financial statements are produced.