This article looks at various aspects of fiscal consolidation in 18 OECD economies. The prospects for fiscal consolidation depend upon the problems a country may face with its debt stock, the political will to deal with these problems and on the costs of consolidation. These costs are a function of the impacts of fiscal policy on the economy, which is the focus of this study. The analysis is based on a series of simulations using the National Institute Global Econometric Model, NiGEM. Fiscal multipliers differ across countries because the structure and behaviour of economies differ.