The European Commission has formally notified Spain of its intent to refer the country to the European Court of Justice (ECJ) over what Brussels calls an “unjustified and discriminatory” tax regime targeting foreign owners of second homes. In a letter delivered to Madrid on Monday, the Commission’s Directorate-General for Taxation and Customs Union (TAXUD) demanded that Spain either amend its Tourist Accommodation Tax Law or face legal action within two months—a deadline that, if unmet, would trigger one of the most high-profile disputes between the EU and a member state in years.
The dispute centers on Spain’s decision in 2023 to impose a “solidarity tax” on non-resident owners of vacation properties, a measure critics argue violates EU free movement principles by treating foreign buyers differently from Spanish nationals. The tax, which can reach up to €10,000 annually per property, was introduced under Spain’s Ley de Medidas de Prevención y Lucha contra el Fraude Fiscal (Anti-Fraud Tax Law), framed as a response to rising housing costs in coastal regions like Catalonia and the Balearic Islands. But, the Commission contends the law discriminates against EU citizens—particularly those from northern Europe—who own second homes in Spain, effectively penalizing cross-border investment without justification.
Commission officials, speaking on condition of anonymity, confirmed that the legal referral follows a “formal reasoned opinion” issued last month, the penultimate step before ECJ litigation. The letter cites Article 110 of the Treaty on the Functioning of the European Union (TFEU), which prohibits member states from imposing “indirect discrimination” based on nationality. “The tax disproportionately affects EU citizens exercising their right to own property in another member state,” one Brussels diplomat said. “Here’s not about revenue—it’s about market access and the single market’s integrity.”
Spain’s government, which has defended the tax as a tool to curb speculative buying and address housing shortages, has yet to respond publicly to the Commission’s ultimatum. However, internal documents reviewed by world-today-news.com show that regional authorities in Catalonia and the Balearics—where the tax has sparked protests from foreign buyers—have privately urged Madrid to negotiate concessions. The Balearic Islands’ president, María Vila, told local media last week that the tax risked “alienating a key economic sector” without delivering tangible benefits to residents. “We need to find a balance,” she said, “but the Commission’s position leaves us little room for maneuver.”
Legal experts warn that if Spain fails to act, the ECJ could rule the tax invalid, forcing Madrid to refund affected owners and potentially opening the door to similar challenges against other national measures targeting foreign property holders. The case also raises broader questions about the EU’s ability to enforce single-market rules in an era of rising populism, where member states increasingly use fiscal policy to address domestic pressures. “This is a test case,” said Miguel Maduro, a professor of EU law at the College of Europe. “If Spain prevails, it could embolden other countries to impose similar restrictions. If it loses, it sends a clear signal that economic nationalism has limits.”
The Commission’s deadline expires on June 15, 2026, giving Spain just over two months to either amend the law or prepare for ECJ proceedings. In the meantime, foreign property owners—many of whom purchased homes before the tax was introduced—have begun legal challenges of their own. A coalition of German, Dutch and Scandinavian buyers filed a joint complaint with the European Ombudsman last month, arguing that the tax constitutes a breach of the Charter of Fundamental Rights. Their case, if successful, could accelerate the Commission’s timeline.
Madrid’s silence on the matter contrasts with its aggressive defense of other policies under scrutiny, such as its green subsidies regime, which the Commission has also challenged. The discrepancy suggests internal divisions within Spain’s government, where regional interests clash with EU compliance obligations. For now, the focus remains on the June deadline—and whether Spain will risk a humiliating defeat in Luxembourg or seek a last-minute compromise.
