Although Wüstenrot has been growing more than twice as fast as the overall market over the last five years, its late arrival in the mortgage business a decade ago means the bank still occupies only 2.5% of the Czech mortgage lending market. Partly because of its small size and its conservative approach, the bank is relatively little profitable with ROE in single-digit territory in the last five years. Size matters and the lack of economies of scale is also reflected in Wüstenrot’s low cost efficiency. In 2012, the bank’s operating costs accounted for over 50% of bank revenues, three times as much as the other pure mortgage bank on the Czech market - Hypoteční Banka.