The bilateral tax agreement between the Swiss Confederation and Austria on cooperation in the area of taxation has been signed on April 13^th, 2012. The main objective of the agreement is to ensure effective taxation of assets not subject to tax in Austria until now. The agreement shall enter into force on January 1^st, 2013. The one-off tax to be paid is the result of a very complex formula and includes the application of a tax rate ranging from 15 % to 30 %. Therefore, the one-off tax/payment will vary considerably and it will be worth examining the formula establishing the latter. Philipp Gaier and Werner Leiter try to illustrate – on the basis of several relevant and exemplary calculations – as many practically relevant case configurations as possible in order to demonstrate the impacts of the formula.