CCCTB is a proposal that was first launched by the European Commission in 2011. It entails a common EU system for calculating the taxable profits of multinational corporations operating in the EU, and dividing this among the EU
member states based on a formula to assess the level of business activity in each country. The proposal does not specify what tax rate the member states should apply to the taxable profits, but simply allocates it and leaves it to
the member state to decide what tax to apply. The proposal was redrafted and relaunched in 2016 (see chapter 5.2 on ‘A coherent system for taxing multinationals’).