Buying a Property with Inheritance Tax Debts: The Supreme Court Sets Key Doctrine

A judgment with direct practical consequences for property transactions: what happens if you buy a home with ISD debts

The Supreme Court has set a criterion that changes the way many property transactions in Spain must be analysed where Inheritance Tax debts are involved.

STS 1421/2026 (Supreme Court Judgment 1421/2026) establishes that the tax authorities may claim Inheritance and Gift Tax (ISD) debts from the buyer of a property, even where the marginal note recording the charge in the Land Registry has already expired.

This is a ruling with a direct impact on any property purchase, especially of properties that come from inheritances.

The facts of the case

The dispute originates in the death of a deceased person in 2009. In the subsequent partition of the estate, a commercial premises in Oviedo was allocated to one of the heirs; the allocation was registered in the Land Registry on 8 January 2013, and at that time a marginal note recording the tax charge for ISD was entered, with a duration of five years.

The heir, without having paid the tax, transferred the property in March 2013 to a commercial company, which in turn transferred it to the appellant by deed of September 2015, registered in October of that same year. In both transfers the existence of the tax charge was expressly recorded.

After enforcement proceedings against the principal debtor, the tax authorities declared the heir insolvent (fallido) in February 2018. In October 2018, when the marginal note of the charge had already expired (it had lapsed in January of that same year), they initiated the procedure to extend secondary liability to the last acquirer of the property, issuing the liability decision in March 2019.

The appellant argued, both before the economic-administrative bodies and in the contentious-administrative courts, that the procedure was time-barred: the wording of the marginal note stated that the property was charged “for five years counted from today”, so that, once that period had elapsed, the tax authorities would have lost the prerogative of extending liability.

The question of cassation interest

Once the cassation appeal was admitted by order of 4 December 2024, the Admissions Section identified the following as the question of objective cassation interest:

To determine whether, once five years have elapsed since the registration in the Land Registry of the relevant marginal note recording the charge for payment of the Inheritance Tax on a property, it is possible to initiate a secondary liability procedure, on the basis of that charge for payment of tax debts, against a third party who acquired that same property within that charge period, once the principal obligor has been declared insolvent.

The applicable legal framework

The judgment systematises the legal regime on the basis of the following provisions:

Article 43.1.d) of Ley 58/2003, General Tributaria (General Tax Act, LGT), provides that those who acquire assets charged by law with the payment of the tax debt are secondarily liable, under the terms of article 79 of that same Act.

Article 79 of the LGT provides that the assets and rights transferred remain charged with liability for the payment of the taxes levied on those transfers, whoever holds them, unless the holder is a third party protected by public registry faith.

Article 100.4 of Real Decreto 1629/1991, de 8 de noviembre, por el que se aprueba el Reglamento del Impuesto sobre Sucesiones y Donaciones (Royal Decree 1629/1991 of 8 November approving the Inheritance and Gift Tax Regulations, RISD) provides that the marginal note recording the charge ceases to have effect and must in any case be cancelled once five years have elapsed from its date.

Lastly, articles 174, 176 and 67.2 of the LGT regulate the regime of secondary liability: its arising is conditional on the prior declaration of insolvency of the principal debtor, that moment being the dies a quo of the four-year limitation period established in article 66.b) of the LGT.

The doctrine set by the Supreme Court

The Chamber dismisses the cassation appeal and sets the following case-law doctrine:

First. The marginal note recording the registry charge and the tax charge are institutions of a different nature and function. The registry note serves an exclusively publicity function: its purpose is to delimit the scope of registry protection for third-party acquirers, not to establish the period during which the tax authorities may bring the secondary liability action. The charge provided for in article 79 of the LGT is, by contrast, a security right in rem arising by operation of law, whose validity does not depend on the registry entry.

Second. The five-year expiry of the marginal note does not extinguish the statutory charge, nor does it turn that period into a substantive limit on liability in rem. The Court recalls that in the STS of 5 June 2018 (cassation appeal 3949/2017) it had already held that the existence and effectiveness of the charge do not depend on the registry entry, which serves a mere publicity function.

Third. The determining moment for assessing whether or not the acquirer is protected by public registry faith — under article 34 of the Ley Hipotecaria (Mortgage Act) — is the date on which the property was acquired. Whoever acquires with the charge note registered and in force is not covered by public registry faith in that respect and assumes the burden under the terms of article 79 of the LGT.

Fourth. The action to extend secondary liability is governed by its own specific regime, with the dies a quo set at the declaration of insolvency of the principal debtor (arts. 174, 176 and 67.2 of the LGT). In the case analysed, the debtor having been declared insolvent in February 2018, the initiation of the liability procedure in October of the same year took place within the four-year period established by law. The fact that the marginal note had expired months earlier is irrelevant for these purposes.

Practical implications for property buyers

The doctrine set by this judgment has direct and significant consequences for any property purchase in Spain:

Whoever acquires a property on which a marginal note recording a tax charge is in force at the time of purchase assumes the risk of being held secondarily liable for the secured tax debt, even if that note expires afterwards and even if the administrative liability procedure is initiated after the registry entry has lapsed.

The only enabling condition for extending liability is that the acquirer bought within the period of validity of the note and that, subsequently, the principal debtor is declared insolvent. From the declaration of insolvency, the tax authorities have four years to bring the action, regardless of the status of the registry entry.

Conversely, whoever acquires the property once the marginal note has expired is protected by public registry faith and cannot be the subject of an extension of liability.

A warning for those who buy properties coming from inheritances

The ordinary conduct of a property purchase does not always include a sufficient tax analysis of the prior chain of transfers. However, STS 1421/2026 shows that this analysis is essential.

Before completing the acquisition of a property, it is advisable to verify rigorously the content of the Land Registry and, in particular, the existence of marginal notes recording tax charges. If the note appears in force at the time of purchase, the acquirer will not be able to invoke the subsequent registry expiry as a shield against a possible extension of liability for Inheritance Tax debts left unpaid by a previous owner.

At Vicens Advisors we analyse the tax situation of properties before signing, identify the encumbrances with tax implications and advise on the real scope of the liabilities assumed in each transaction.

This article is for information purposes only and does not constitute individual legal or tax advice. For any specific query, we recommend that you contact a qualified tax adviser.

© Vicens Advisors, S.L. All rights reserved.
Total or partial reproduction of this content, by any means or procedure, is prohibited without the express written authorisation of its owner. Any unauthorised use will constitute an infringement of intellectual property rights under the legislation in force.