The Federal Planning Bureau has a long tradition in providing long-term projections focused on the evolution of social expenditure within an overall framework of public finance, using the MALTESE system of models. This outlook is based on different scenarios: demographic, socio-economic, macroeconomic and welfare adjustment. The purpose of this publication is to describe the methodology for the construction of the socio-economic and macroeconomic scenarios and to illustrate it by presenting the main results from the 2011 projection for the Annual Report of the Study Group on Ageing.