How the DGT's position has evolved
Current position
The transformation of the corporate form or the modification of the legal regime that implies a change in the tax rate concludes the tax period. In the context of tax groups, dependent entities cannot be part of the group if they are subject to a different tax rate than that of the representative entity. In the case of cooperatives with differentiated rates for cooperative and extra-cooperative results, the integration of companies with the general rate is excluded.
The DGT's position remains constant regarding the consequences of legal transformation, stating that the change in tax rate entails the conclusion of the tax period (V0320-14, V3146-15, V1925-20). No doctrinal evolution is observed, but rather an application of criteria regarding the continuity of periods and the compatibility of rates in tax groups.
Analysis based on 49 of 54 rulings with a stated position. Updated 23 September 2026.