We extend the WACC approach to a tax system having a firm income tax and a personal income tax of the investor as well. We use an artificial tax system incorporating most of the G-7 national tax codes as for example the classical or the imputation systems.

Entities reporting under IFRSs are required to determine a value in use in accordance with IAS 36: Impairment of Assets. The value in use is the present value of the expected future cash flows. Appendix A to the standard gives guidance on how to apply the DCF calculus in the context of IAS 36....