How the DGT's position has evolved
Current position
The tax base is the fair value of the assets and rights transferred, which must be reported by the taxpayer. In the event that the declared value or the value resulting from verification is lower than the agreed price or consideration, the latter shall prevail as the tax base. In preventive annotations, the base cannot exceed either the fair value of the seized assets or the total amount of the sum giving rise to the seizure.
The DGT's position remains constant in defining fair value as the tax base, equating it to market value when it exists. The evolution shows greater technical precision by establishing that the agreed price prevails over any other value if it is higher, and by delimiting the caps applicable to preventive annotations.
Turning points
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Establishes that if the declared value or the value from verification is lower than the agreed price, the agreed consideration prevails as the tax base.
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Specifies that in preventive annotations, the base is jointly limited by the fair value of the seized assets and the amount of the sum motivating the seizure.
Analysis based on 67 of 71 rulings with a stated position. Updated 23 September 2026.