This study provides the first comprehensive analysis of foreign-controlled enterprises in the German service sector based on new micro-data from official German statistics. Various performance measures were examined via comparison of unconditional and conditional means and through use of quantile regression techniques. Foreigncontrolled affiliates consistently performed better than German-owned affiliates. In contrast, profitability exhibited precisely the opposite trend. Moreover, labour productivity did not significantly differ when the comparison group consisted of domestically owned affiliates with a high degree of internationalization. A breakdown by country of origin showed that European affiliates pay lower wages and export less relative to non-European affiliates, and US firms have no productivity advantage as in manufacturing.