How the DGT's position has evolved
Current position
The acquisition value includes investments, improvements, and expansions that increase the capacity, habitability, or useful life of the property. Repairs and maintenance intended to maintain the useful life or normal use do not form part of said value. The taxpayer bears the burden of justifying the nature of the works through means of proof admitted under Law.
The DGT's position remains constant throughout the analyzed sequence. No changes are observed in the distinction between improvements, which are integrated into the acquisition value, and repairs, which are not. The doctrine has remained stable, reinforcing the need to certify the reality of the works.
Analysis based on 52 of 54 rulings with a stated position. Updated 18 September 2026.