naa a22 4500 510735991 CHVBK 20180411083010.0 cr unu---uuuuu 180411e20130701xx s 000 0 eng 10.1007/s11573-013-0661-9 doi (NATIONALLICENCE)springer-10.1007/s11573-013-0661-9 Income determination for corporate tax purposes using IFRS as a starting point: evidence for listed companies within Austria, Germany, and The Netherlands [Elektronische Daten] [Rebekka Kager, Rainer Niemann] The internationalisation of financial accounting and the European Commission's ambition to harmonise corporate taxation have raised the question whether IFRS accounts could be used for tax purposes. In order to quantify the effects of an IFRS-based taxation on corporate tax burdens in different EU member states, we estimate firms' tax equity using notes on income taxes in IFRS financial statements of companies listed in Austria, Germany, and The Netherlands. The difference between estimated tax equity and IFRS-equity, adjusted for the effect resulting from the recognition of deferred taxes, shows the effect of using IFRS as a tax base on the present value of corporate taxes. We find that estimated tax equity is mostly lower than IFRS-equity, indicating that an IFRS-based taxation would often increase the present value of corporate taxes. The median of estimated tax equity is 5.6% (Austria), 6.4% (Germany) and 9.0% (The Netherlands) below IFRS-equity. However, an IFRS-based taxation does not always induce higher equity as often argued in the literature. In 307 of 1,113 totally analysed firm-years, estimated tax equity exceeds IFRS-equity. To find a further estimation for the effects of tax base reforms we also approximate the total stock of unused tax losses and the amount of useable tax losses. We find that deferred tax assets for unused tax losses are depreciated to a substantial extent. Springer-Verlag Berlin Heidelberg, 2013 Tax reform nationallicence IFRS nationallicence Deferred taxes nationallicence Common consolidated corporate tax base (CCCTB) nationallicence Book-tax differences nationallicence Kager Rebekka Institute of Accounting and Taxation, University of Graz, Universitätsstraße 15, 8010, Graz, Austria aut Niemann Rainer Institute of Accounting and Taxation, University of Graz, Universitätsstraße 15, 8010, Graz, Austria aut Journal of Business Economics Springer-Verlag 83/5(2013-07-01), 437-470 0044-2372 83:5<437 2013 83 11573 https://doi.org/10.1007/s11573-013-0661-9 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11573-013-0661-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Kager Rebekka Institute of Accounting and Taxation, University of Graz, Universitätsstraße 15, 8010, Graz, Austria aut NATIONALLICENCE 700 1- Niemann Rainer Institute of Accounting and Taxation, University of Graz, Universitätsstraße 15, 8010, Graz, Austria aut NATIONALLICENCE 773 0- Journal of Business Economics Springer-Verlag 83/5(2013-07-01), 437-470 0044-2372 83:5<437 2013 83 11573 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer