This six year proposal aims to widen access to HIV treatment, address isolation, invest in prevention and develop an integrated model of HIV care. The social impact bond expects to reach up to 493,000 people and support up to 1,250 newly diagnosed people to get the treatment they need to stay healthy. The seven local and national commissioners are expected to generate net savings of £11.4m. £2m planned social investment should generate up to 2% annual return at 4% of the total cost of the SIB.