This paper evaluates the impact of the European Commission’s Proposal for a Council directive on the Common Consolidated Corporate Tax Base (CCCTB) (COM (2011) 121/4). We analyse the impact of the apportionment formula to be applied to the CCCTB on the revenues of the Slovak state budget. The sample of our analysis is composed of eleven transnational corporations operating in the Slovak Republic and other EU member states. The results indicate a decrease in tax revenues under the proposed CCCTB system in comparison to the current national tax legislation. By contrast, according to the data available, the likelihood that Slovakia will benefit from the CCCTB system by collecting more taxes seems to be low.