How the DGT's position has evolved
Current position
The 60% deduction for energy rehabilitation works in buildings for residential use is applicable until December 31, 2025. It requires proof of a reduction in non-renewable primary energy consumption of at least 30% or an improvement in the energy rating to class «A» or «B» through an energy efficiency certificate. Certificates issued prior to the start of the works are only valid if they were issued within a maximum period of two years before the start of said works. The deduction is applied in the period in which the certificate following the works is issued.
The DGT's position remains constant regarding the substantive requirements for energy improvement and temporal limits. The evolution focuses on the precision of formal requirements, especially concerning the validity of prior certificates and the mandatory nature of their registration in accordance with Royal Decree 390/2021. Recent rulings confirm the application of the deduction even in tourist accommodation classified as income from real estate capital.
Turning points
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Establishes the need for certificates to be issued and registered in accordance with Royal Decree 390/2021.
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Introduces the time limit for prior certificates, indicating that they are only valid if two years have not elapsed between their issuance and the start of the works.
Analysis based on 43 of 43 rulings with a stated position. Updated 23 September 2026.