How the VAT pro rata rule is affected according to the TEAC

The choice of the pro-rata method and its effects once the deadline has expired

The Spanish Central Economic-Administrative Court (TEAC), in its resolution of 27 February 2026, has clarified two key aspects of the VAT deduction regime that are highly relevant for taxpayers carrying out both deductible and non-deductible transactions. First, it confirms that the choice between the general and special pro-rata methods qualifies as a true tax election. Second, it reinforces a restrictive approach to modifying such election once the filing deadline has elapsed.

From a legal standpoint, the TEAC aligns with recent Supreme Court case law by characterising the pro-rata method as an option between mutually exclusive regimes. This implies that, once exercised through the VAT return, it cannot be amended outside the statutory period, in accordance with Article 119.3 of the General Tax Law. The ruling highlights that the regulatory reform introduced in 2013 eliminated the former “blind choice” issue, allowing taxpayers to decide at year-end with full knowledge of their transactions. Consequently, the grounds for a flexible interpretation—previously accepted by courts—are no longer applicable.

The decision also reiterates that exceptions to this irrevocability are only possible under very limited circumstances. Specifically, a change would require a substantial alteration of the underlying facts, absence of fraud, and an impact on constitutional tax principles. In the case at hand, the TEAC rejects such exception, noting that the relevant transactions were already known to the taxpayer when the option should have been exercised.

Equally significant is the Court’s position on the calculation of the general pro-rata. The TEAC confirms that exempt real estate transactions arising from expropriations must be included in the denominator when they form part of the taxpayer’s ordinary business activity. The key criterion is not whether the transaction is occasional, but whether it is connected to the economic activity carried out. Following both Supreme Court and CJEU doctrine, transactions that represent a direct and necessary extension of the business cannot be treated as ancillary.

Finally, the TEAC dismisses the existence of separate business sectors, concluding that expropriations of land remain within the scope of the real estate development activity.