The apportionment of input VAT deduction for mixed-use buildings has repeatedly been the subject of fiscal court proceedings. The German Federal Fiscal Court now states: The taxpayer is not bound to the proportion chosen if it transpires later that it is not appropriate. The taxpayer therefore has a de facto right of choice in these circumstances. The burden of proof as to whether the proportion according to the square footage is more accurate than the allocation according to the turnover lies with the tax office. In the case of significant differences in the equipment of mixed-use buildings, the input VAT is to be allocated according to the (object-related) proportion of the turnover.