How the DGT's position has evolved
Current position
For the deduction for energy efficiency in buildings, the base is constituted by the amounts paid by the homeowners' association according to the participation coefficient of each taxpayer. Subsidies received or to be received must be deducted from this base. In the case of electric vehicles, the deduction is applied in the period of registration, deducting public aid.
The sequence does not show a doctrinal evolution on a single concept, but rather deals with deductions of a different nature (housing, R&D, audiovisual, energy efficiency, and vehicles). In the field of energy efficiency, recent rulings maintain the requirement to reduce the base by the subsidies received.
Analysis based on 38 of 41 rulings with a stated position. Updated 16 September 2026.