In a popular vote of May 19, 2019, the Swiss electorate approved an important tax reform. The revised corporate income tax law abolishes the special cantonal tax treatment for holding, domiciliary and mixed companies by the end of 2019. Furthermore, the law includes transition and replacement measures including the introduction of a patent box regime, an R&D super deduction and a notional interest deduction on excess equity. Moreover, most cantons plan to significantly reduce their ordinary corporate income tax rates. In addition, the reform includes new rules on the immigration to and the exit from Switzerland, privileged taxation of dividend income and the capital contribution principle.