This document provides background information on the Private Finance Initiative (PFI) in the UK, including its rationale and accounting treatment. It explains that PFI aims to enable more capital investment by transferring risks to the private sector and leveraging private sector efficiencies. Supporters argue PFI can deliver better value for money through innovation and control over project delivery, while critics question whether real cost savings are achieved. The document also outlines how PFI projects are accounted for and the sectors where PFI investment has been substantial, such as health, education, and defense.