This paper explores the question of how national fiscal policies could be conducted within the European Monetary Union. The discussion touches upon this issue in relation to the theory of optimum currency areas; presents the debt sustainability issue in the context of a monetary union; examines briefly the determinants of debt dynamics; and interprets the restraints imposed on national fiscal policies by the Maastricht Treaty. The tentative conclusion is that the creation of the EMU will be associated with smaller size national government sectors.