Dynamic environment forces companies to develop new approaches to establishing objectives and to develop management practices. Apart from doing profit-making activities, companies are forced to undertake activities aiming at their long-term sustainable development. As a result of deregulation and globalization, the banking sector had to accept the postulations of sustainable development and to keep their position on the market through establishing lasting relationships with customers, environment organizations, employees and a local community. The main goal of this paper is to explore implications of sustainability on the banking sector. Based on the research on the sample of 33 bank managers, the paper is trying to find out whether there are similarities in sustainability aspects in the banking sectors of Poland and Croatia. The findings of the papers suggest that banks in Poland express stronger need to take into account the environmental, social and economic concerns comparing to banks in Croatia.