To gain a better understanding of the financial sustainability of health systems, the OECD has produced a new set of health spending projections up to 2030 for all its member countries. Estimates are produced across a range of policy situations. Policy situations analysed include a “base” scenario – estimates of health spending growth in the absence of major policy changes – and a number of alternative scenarios that model the effect on health spending of policies that increase productivity or contribute to better lifestyles; or conversely, ineffective policies that contribute to additional cost pressures on health systems.