This document summarizes lessons learned from using outcome-based contracting models in other sectors that could be applied to the NHS. It discusses programs in employment and justice that aimed to help the long-term unemployed find jobs and reduce criminal reoffending. Key lessons include: piloting programs first to avoid unintended consequences of large-scale implementation; ensuring incentives do not result in "cream skimming" harder to help groups; keeping metrics and measures as simple as possible to avoid perverse incentives and gaming; and distinguishing cost savings from quality outcomes, as prioritizing savings alone could conflict with care objectives. Overall, the document advocates testing and piloting approaches on a smaller scale before widespread adoption to help programs succeed.