Due to its strong links with Number 10 Downing Street it is often erroneously referred to in the media as the No 10 Strategy Unit, however it is formally part of the Cabinet Office and reports through the Cabinet Secretary Gus O'Donnell. It has a complement of around forty-five staff. On a day-to-day level it works closely with the Number 10 Policy Unit, which is headed by Dan Corry. While there is no direct equivalent in other countries, the PMSU has many functions that overlap with the Executive Office of the President of the United States.
It is based in the Admiralty Arch, part of the Cabinet Office's buildings in Whitehall.