This bachelor´s thesis analyzes the trends in the number of clients and the development of the volume of loans to small and medium-sized businesses. Three leading banking institutions on the market of commercial banks in the Czech Republic we selected: Česká spořitelna, Československá obchodní banka and Komerční banka. From the figures, which were drawn from the banks annual reports for the years 2009-2014, were compiled time series, which were statistically analyzed using elemental characteristics of time series and by testing of depending qualitative characters. The thesis presents suggestions for banking institutions, based on a survey of preferences and relations between companies and banks and their products, which lead to a more effic...