TAX LAW DIVISION
The Administrative Litigation Chamber requires that, in taxes triggered by an instantaneous taxable event, such as Transfer Tax and Stamp Duty (ITP-AJD), the Tax Administration identify the specific transaction it intends to examine. A mere reference to the tax and the relevant year is not sufficient to interrupt the limitation period.
The Supreme Court has strengthened taxpayers’ safeguards against tax inspection proceedings initiated in overly generic terms. In Judgment 968/2026, of 22 July, it held that, in taxes triggered by an instantaneous taxable event, a notice initiating tax verification proceedings that merely refers to a period of time — “ITP-AJD, tax year 2010” — does not interrupt the limitation period if it does not sufficiently identify the taxable transaction concerned.
The ruling, handed down in an appeal on a point of law, establishes a criterion of considerable practical importance both for the conduct of tax proceedings by the Tax Administration and for the defence of taxpayers subject to inspection procedures. The core of the Supreme Court’s decision is clear: the limitation period cannot be interrupted by ambiguous notices that potentially open the door to an unlimited review of all transactions carried out by a taxpayer during a given year.
The case arose from a sale and purchase of shares in a company completed on 30 December 2010. The deadline for filing the corresponding tax return expired on 5 February 2011; accordingly, the Tax Administration’s right to assess the tax liability would, in principle, have become time-barred on 5 February 2015.
Just weeks before that date, on 19 January 2015, the Tax Inspectorate notified the acquiring entity that verification and investigation proceedings had been initiated. The notice referred to the tax as “ITP-AJD” and to “tax year 2010”. However, it did not specify whether the investigation concerned the Transfer Tax or Stamp Duty component, nor did it identify the specific transaction under review.
The transaction was not identified in the procedural records until the statement of objections issued on 30 September 2015. By that point, according to the Supreme Court’s reasoning, the four-year limitation period had already expired. The High Court of Justice of Madrid annulled the tax assessment on the grounds that the claim was time-barred, and the Supreme Court has now upheld that conclusion.
The Regional Government of Madrid argued for a broad interpretation of Article 68.1(a) of the General Tax Law. According to its position, any administrative action formally notified to the taxpayer and aimed at verifying its tax position should interrupt the limitation period, even where the scope of the proceedings was defined solely by reference to a particular year. In its view, the regulations permit the notice initiating proceedings to specify a “time period”, meaning that it was not necessary to identify the individual transaction.
The Supreme Court rejects that approach, as had previously been done by the High Court of Justice of Madrid. Although Article 68 of the General Tax Law refers to “any action” taken by the Tax Administration to verify, inspect or assess a tax liability, the Chamber clarifies that this wording does not permit a generic interruption of the limitation period disconnected from a specific tax liability. The proceedings must be substantively directed at a specific obligation or, at the very least, one that can be objectively determined from the notice received by the taxpayer.
In reaching this conclusion, the judgment links the General Tax Law to the General Regulations governing tax management and inspection proceedings. These require the notice initiating proceedings to expressly state the subject matter of the proceedings, the relevant tax liabilities or their constituent elements and, where applicable, the tax periods, assessment periods or time frame concerned.
The decisive distinction lies in the nature of the tax. In periodic taxes, where the tax liability is linked to a tax year or assessment period, defining the relevant period may be sufficient to identify the subject matter of the verification. By contrast, in taxes triggered by an instantaneous taxable event, each taxable event gives rise to a separate tax liability. In the case of ITP-AJD, the tax liability arises when the taxable transaction takes place — in this case, the sale and purchase of the shares.
The ruling does not prevent the Tax Administration from investigating or assessing tax liabilities arising from transactions. It does, however, require precision from the outset. The identification must be sufficient to enable the taxpayer to understand which tax liability is being examined, so that any interruption of the limitation period is linked to that specific obligation. This safeguard is not merely a formal requirement: it directly affects the temporal limits on the Tax Administration’s powers of verification and assessment.
The result is a doctrine that strengthens legal certainty. For taxpayers, it provides a significant avenue for challenging tax assessments arising from proceedings initiated by excessively broad notices. For the Tax Administration, it means that greater care must be taken when defining the subject matter of inspection proceedings, particularly where the taxes concerned arise from isolated transactions rather than from tax periods.
