That's an excellent question. There hasn't been one social impact bond project that has ended yet, so we don't know. The contracts are still in place. The Peterborough one is the one that was initially launched, but it hasn't concluded yet. That's the one in the U.K. Other social impact bond projects are ongoing across different states, so it would be too soon to say what governments might choose to do at the end of those, or indeed what not-for-profit service providers might choose to do at the end of those.
On February 17th, 2015. See this statement in context.