Exploring Formula Allocation for the European Union.

This paper explores the efficiency impacts of two methods of consolidated base taxation with formula allocation under consideration in the European Union. The first method, common (consolidated) base taxation (CCBT), would allow companies to choose a single tax base for their EU-wide operations. This tax base would be common throughout the participating member states. The second method, Home State taxation (HST), would also allow companies to choose a single tax base for their EU-wide operations. But, unlike with CCBT, the tax base would be defined according to the rules in the company's residence, or "home," state. Thus, several different tax bases would exist within the EU. Both methods would use a common formula to distribute profits across countries. This paper finds that since countries continue to set corporate income tax rates, economic inefficiencies continue to exist under both methods. However, under HST, since the tax base differs according to residence, additional inefficiencies may arise depending on whether countries reduced their tax rates to combat the incentive for companies to relocate to locations with narrow tax bases. Copyright 2003 by Kluwer Academic Publishers