This paper shows how the German Council of Economic Experts (GCEE) determines Germany’s potential output, and compares the results with those of the European Commission. The approach of the European Commission is a natural benchmark, as it provides the basis for the deficit and debt rules of the European Union. In comparison with the European Commission’s method, the GCEE’s method places greater emphasis on demographic factors in estimating labour input. Additionally, both approaches differ regarding how they estimate the structural unemployment rate and total factor productivity. Finally, this paper discusses the limitations of, and the different options for estimating potential output.