Sir John Edward Astley Troup (born 26 January 1955) is a British tax lawyer, and was a civil servant at HM Treasury and then HM Revenue & Customs. He spent two periods as a tax partner at the law firm Simmons & Simmons, from 1985 to 1995 and from 1997 to 2004, and was a special adviser to Kenneth Clarke as Chancellor of the Exchequer in 1995-97.
He rejoined HM Treasury in 2004, and became Executive Chair and First Permanent Secretary of the HM Revenue and Customs (HMRC) in April 2016.
