How the DGT's position has evolved
Current position
The use for an economic activity requires that private use be ancillary and irrelevant so that the asset does not lose said status. In the case of the deduction for electric vehicles, the vehicle cannot be used for an economic activity. For the exemption for reinvestment in the primary residence, the part of the dwelling used for the development of professional activity must be excluded.
The DGT's position remains constant regarding the need to distinguish the part of the asset intended for economic activity from that intended for private or residential use. The rulings confirm that the use for economic activity must be real and that any professional use must be segregated for the calculation of exemptions or deductions. No change in criterion is observed, but rather an application of the same logic of segregation in different scenarios.
Analysis based on 12 of 13 rulings with a stated position. Updated 27 September 2026.