Landmark decision clarifies depreciation rules for rental properties sold in Spain
A new ruling from the Tribunal Supremo could have a significant financial impact on expats, international landlords and private property investors in Spain.
In its judgment of 20 November 2025, the Supreme Court clarified how depreciation (“amortización”) must be calculated when a non-business taxpayer sells a rented property and computes capital gains tax under Spanish IRPF rules.
The decision is particularly important because it adopts a more flexible and economically realistic interpretation of Spanish tax law, allowing taxpayers to use depreciation tables based on the actual useful life of the building instead of automatically applying the standard 3% annual rate previously defended by the Spanish Tax Agency.
The Background
The case involved a private individual who owned a rented residential property but did not operate a business or professional activity.
When the owner sold the property, a dispute arose with the Agencia Tributaria regarding the correct method for calculating depreciation that had to reduce the acquisition value of the property for capital gains tax purposes.
The taxpayer had applied a depreciation calculation based on the useful life of the building, using the official depreciation tables contained in the Ministerial Order of 27 March 1998. This resulted in a significantly lower accumulated depreciation amount than the automatic 3% annual rate applied by the tax authorities.
The difference was substantial:
- the taxpayer declared a capital loss;
- the Tax Agency recalculated the figures;
- and the reassessment converted the transaction into a taxable capital gain exceeding €110,000.
After losing before the Regional Economic-Administrative Court and the High Court of Asturias, the taxpayer appealed to the Supreme Court.
Arbitration: A Binding Decision Outside the Courts
Arbitration is a more formal ADR method in which the parties agree to submit their dispute to one or more arbitrators. The arbitrator issues a binding decision, known as an arbitral award, which has the same legal effect as a final court judgment.
Unlike mediation and conciliation, arbitration does not aim to reach a negotiated settlement. Instead, it provides a definitive resolution imposed by a neutral third party. Arbitration is commonly used in commercial and contractual disputes, including international matters, and is valued for its confidentiality, efficiency, and the ability to appoint arbitrators with specialist expertise.
The arbitral award is directly enforceable and can only be challenged on very limited legal grounds.
The Supreme Court’s Position
The Supreme Court ultimately sided with the taxpayer.
The ruling establishes that, when calculating capital gains arising from the sale of a rented property, a taxpayer who is not carrying out an economic activity may still apply a “minimum depreciation” based on the real useful life of the property.
Importantly, the court distinguished between two separate tax concepts:
1. Depreciation for rental income purposes
For annual rental income calculations, Spanish law allows depreciation deductions up to 3% of the higher of:
- acquisition cost; or
- cadastral value, excluding the value of the land.
2. Depreciation for capital gains purposes
For calculating the acquisition value upon sale, the Supreme Court clarified that the law refers instead to a concept of “minimum depreciation,” which may be determined according to the actual useful life of the building.
This means taxpayers are not necessarily forced to apply the fixed 3% rate when computing future capital gains.
Why This Matters for Expats
Many expats in Spain own rental apartments, holiday homes or long-term investment properties without operating through a formal company structure.
Until now, the Tax Agency frequently argued that non-business taxpayers could not use depreciation tables linked to the useful life of the building and instead had to apply the fixed 3% rule. This often increased taxable capital gains significantly when the property was sold.
The Supreme Court rejected that restrictive interpretation.
The judges emphasized that economic reality and the true depreciation of the building must prevail over purely formal distinctions between:
- landlords carrying out an “economic activity,” and
- private individuals earning rental income.
The court also stressed that denying realistic depreciation calculations could conflict with Spain’s constitutional principle of taxation according to economic capacity.
A More Flexible Interpretation of Spanish Tax Law
One of the most significant aspects of the judgment is the Supreme Court’s acknowledgment that Spanish IRPF legislation does not expressly define how “minimum depreciation” must always be calculated.
Because of this legislative gap, the court accepted the use of:
- official depreciation tables,
- accounting criteria,
- and useful-life calculations commonly applied in other tax areas, including corporate taxation.
This creates a more coherent and realistic approach to property depreciation.
Practical Implications
For expats and international property owners, the ruling may:
- reduce taxable capital gains on future property sales;
- provide greater flexibility in depreciation calculations;
- strengthen defenses in disputes with the Tax Agency;
- and potentially open the door to reviewing prior assessments in certain cases.
However, each property situation remains highly fact-specific, especially where:
- partial personal use exists,
- renovations were carried out,
- or previous depreciation deductions were inconsistently declared.
Professional tax advice remains essential before filing or amending returns.
Key Takeaway
The Supreme Court has confirmed that non-business landlords are not automatically restricted to the rigid 3% depreciation model when selling rented property.
Instead, taxpayers may apply a depreciation method based on the actual useful life of the building, provided it reflects genuine economic depreciation and remains within the limits established by Spanish tax law.
For many expats and international investors in Spain, this judgment represents a welcome move toward a fairer and more economically accurate tax treatment of real estate investments.
Source: Supreme Court Judgment (Contentious-Administrative Chamber), 20 November 2025, No. 1502/2025.
