The President's Emergency Plan for AIDS Relief (PEPFAR) provides more than $5 billion per year to prevent and treat HIV/AIDS. Exactly how is that money spent? Donors, recipients, and even PEPFAR staff are often left guessing, because much of the extensive data the U.S. government collects on the program isn't released. In this new CGD note, Michael Bernstein and Sarah Jane Staats (Hise) urge the U.S. Congress to require that PEPFAR regularly release this data. They argue that this would improve coordination between PEPFAR and other donors, help PEPFAR staff assess progress and hold recipients accountable, and increase cost-effectiveness. Some of the data will soon be available anyway: CGD's HIV/AIDS Monitor is preparing to release PEPFAR funding data for Fiscal Years 2004-2006 obtained by a partner organization through a Freedom of Information Act request.