Currently 6.4 million people in South Africa live with HIV, this figure represents a quarter of the burden of HIV infections in sub-Saharan Africa and 18 per cent of the global burden. With this view, the South African National HIV Prevalence, Incidence and Behaviour Survey, 2012 is a crucial report for government, policy makers and other stakeholders as they work towards reducing the HIV epidemic in South Africa. This 2012 HIV survey is the fourth in the series of national population-based surveys. The survey was conducted from December 2011 to November 2012. As with previous surveys, it was designed to investigate the overall HIV prevalence, incidence and behaviour as well as social determinants that drive the epidemic. It also served to collect data to help monitor the National Strategic Plan 2007-2011 and set the baseline for the 2012-2016 NSP. This report is a must-read and essential for researchers who want to understand the HIV dynamics in South Africa.