Traditionally, the existence of a privileged tax regime has been justified on the basis of the unique nature of cooperatives share capital and profits. In Spain, such a system resulted in the Law 20/1990,19 December, of Taxation of cooperatives. However, this law today shows quite inadequate to meet the demands of cooperatives; on the other hand, the regime has been challenged by other economic operators who feel discriminated against by the favorable treatment given to cooperatives.In the European Union for some years there is an obvious concern about it. By 2001, the European Commission considered that there were significant differences between cooperative societies and the purely commercial ones and seemed to endorse the tax difference b...