The recent crisis has revealed large differences in external competitiveness between euro area member countries. Since nominal exchange rate devaluation is not an option for members of a currency area, governments in troubled member countries have been considering so-called fiscal devaluation, i.e. a shift from employers’ social security contribution to value added tax, as an alternative means to restore competitiveness. This paper discusses the potential benefits and drawbacks of such a reform and investigates under which circumstances it would have the intended effects. It argues that a fiscal devaluation can have transitory effects, but that any permanent real effects are likely to be small in size. The policy tool can thus not be a substitute for deeper structural reforms of labour, product and financial markets. However, it may be helpful as part of a broader package of reforms.