How the DGT's position has evolved
Current position
The 60% deduction for energy rehabilitation works in buildings with predominantly residential use requires proof, through energy efficiency certificates, of a reduction in non-renewable primary energy consumption of at least 30% or an improvement to class 'A' or 'B'. Co-owners may apply the deduction proportionally to their ownership interest, even if the invoice is issued in a single name. Subsidies under Royal Decree 477/2021 are not included in the Personal Income Tax (IRPF) taxable base.
The DGT's position remains constant regarding the technical requirements for the deduction and the need for prior and subsequent certificates. The doctrine has expanded to clarify operational aspects such as application in co-ownership, the management of successive works, and the non-inclusion of specific public aid.
Turning points
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Establishes that for successive works, the improvement must be compared against the certificate issued after the first work.
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Specifies that each co-owner can apply the deduction according to their percentage of ownership, regardless of whose name appears on the invoice.
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Determines that subsidies for solar panels under Royal Decree 477/2021 are not included in the IRPF taxable base.
Analysis based on 55 of 60 rulings with a stated position. Updated 16 September 2026.