The idea of harmonizing corporate income taxes is currently one of the most important topic of debate on the agenda of the European Commission, but also in the specialists' theoretical approaches. The extreme diversity of these approaches is a relevant indicator for the complex problems that prevent the formulation of well known solutions in this field, disregarding the political feasibility considerations. This paper present a critical approach of the main reactions of experts, politicians and business representatives regarding the trend of harmonizing corporate income taxes in the EU.