Using simple benchmark models, this paper gives an introductory analysis of three separate policy issues that relate to the taxation of multinational firms: (i) the spread of tax measures that provide discriminatory tax relief to multinational firms; (ii) the switch from the current separate accounting system to a consolidated corporate tax base with formula apportionment; (iii) the introduction of a minimum statutory corporate tax rate in a geographically restricted area. Prior to these analyses, we briefly survey some of the empirical evidence on both the general development of corporate taxation in Europe and the OECD, and on the tax preferences granted to multinational firms.