Inheritance Tax When an Inheritance Is Subject to a Suspensive Condition

This article examines the taxation of an inheritance under Spain’s Inheritance and Gift Tax (ISD) when it is subject to a suspensive condition. It explains when the tax becomes chargeable, the obligation to file a return and the need for a supplementary self-assessment, based on current legislation, Supreme Court doctrine and binding ruling V0005-25 issued by the Directorate General for Taxes.

Deferral of limitations and the chargeable event for inheritance tax: Analysis of Case V0005-25

1. Background and applicable legislation

The case concerns an Italian citizen resident in Spain who is due to receive an inheritance subject to a condition imposed by his father, who lives in Italy. The condition requires the beneficiary, or his heirs, to live continuously in Italy for two years before acquiring full ownership of the assets or rights in the inherited share. Because this condition delays the effectiveness of the acquisition, it directly affects when the ISD becomes chargeable.

The tax is governed by the following provisions:

• Law 29/1987 of 18 December on Inheritance and Gift Tax (LISD):
  • Articles 6 and 7 establish personal tax liability for residents in Spain and tax liability limited to assets located in Spain.
  • Article 24 governs when the tax becomes chargeable on death and provides special treatment for acquisitions subject to limitations.
• Royal Decree 1629/1991 of 8 November, approving the Inheritance and Gift Tax Regulations (RISD):
  • Articles 47(3), 67 and 87 supplement and specify the time limits and conditions for the chargeable event and filing self-assessments.

The general principles in Law 58/2003 of 17 December, the General Tax Act (LGT), must also be considered, especially Article 21(1), which makes the date of the chargeable event decisive in defining the tax obligation. The principles of hierarchy of laws and speciality also guide the interpretation of tax legislation.

2. When the tax becomes chargeable and conditions affecting succession

For inheritances, the ISD generally becomes chargeable on the date of the deceased’s death, under Article 24 LISD and Article 47 RISD. However, where the acquisition of assets or rights is conditional—for example, under a succession agreement requiring the beneficiary to live in Italy for two years—the acquisition is treated as deferred until the restriction ends.

Key points:

• Obligation to file: Articles 6 and 7 LISD provide that taxpayers resident in Spain are subject to personal tax liability regardless of where the assets are located. In this case, the beneficiary must report the inheritance within six months of the deceased’s death, even if the effective acquisition is deferred.
• Chargeable event and suspensive condition: The legislation treats the acquisition as taking place when the restriction ends—in this case, once the two-year residence condition in Italy has been met. In the meantime, the tax return is filed in advance, followed by a supplementary self-assessment when the condition is fulfilled.
• Valuation and tax due: The value of the assets and the applicable tax rates are updated when the tax actually becomes chargeable, as provided in Article 24(3) LISD and Article 47(3) RISD. A new calculation of the tax due must therefore take into account the assets and circumstances at the time of death, as well as the terms of the succession.

3. Applying the legislation and relevant legal doctrine

The case also illustrates the difficulty of reconciling general rules, such as those in the LGT, with the specific rules governing the ISD. Several points of law and doctrine are relevant:

• Hierarchy of laws and the principle of speciality: The specific legislation (LISD and RISD) takes precedence where it sufficiently regulates the facts in question. Where it does not fully address an issue—for example, when the ISD becomes chargeable on a conditional acquisition—reference must be made to the general rule in Article 21(1) LGT, which places the chargeable event when the restrictions cease.
• Supreme Court case law: The article refers to established Supreme Court doctrine, including Judgment 909/2003 and later decisions, confirming that the date of the chargeable event is essential to defining the tax obligation and valuing the assets. For deferred acquisitions, the supplementary self-assessment must reflect the taxpayer’s position when the restriction ends, updating the value and calculation coefficients, such as those in Article 22 LISD.
• Filing formalities and deadlines: Article 67 RISD sets a six-month deadline for filing a return on an acquisition due to death. This deadline applies regardless of when the tax actually becomes chargeable, requiring taxpayers to file an initial return in advance and a supplementary self-assessment later.

4. Conclusions and practical implications

In the scenario described, if the beneficiary’s father dies while the beneficiary is resident in Spain, the following obligations arise:

1. Initial return: Within six months of the death, the beneficiary must file a return under the personal liability rules, including all the assets to be inherited. This must be done even though the acquisition is conditional and the ISD has not yet actually become chargeable.
2. Supplementary self-assessment: Once the suspensive condition is met—that is, once the beneficiary or their heirs have lived continuously in Italy for two years—a supplementary self-assessment must be filed. At this stage, the assets are revalued and the final tax due is calculated using the coefficients and reliefs applicable under the legislation in force.
3. Application of legislation and doctrine: The chargeable event and the resulting tax obligation must be determined under Article 24 LISD and Article 47 RISD, supplemented by Article 21(1) LGT. Supreme Court doctrine supports this interpretation and the updating of the asset value and tax due when the restrictions end.

In short, the beneficiary must take two steps: file an advance return within the statutory deadline, and then submit a supplementary self-assessment once the conditions in the succession agreement have been fulfilled. This mechanism supports the proper application of the ISD, respects both the principle of legality and the speciality of the relevant tax rules, and avoids taxing an acquisition before it takes effect.

Sources and references:

• Binding ruling V0005-25 of the Directorate General for Taxes’ Subdirectorate General for Wealth Taxes, Fees and Public Prices, issued on 2 January 2025.
• Law 29/1987 of 18 December on Inheritance and Gift Tax (Articles 6, 7 and 24(3)).
• Royal Decree 1629/1991 of 8 November approving the Inheritance and Gift Tax Regulations (Articles 47(3), 67 and 87).
• Law 58/2003 of 17 December, the General Tax Act (Article 21(1)).
• Supreme Court and Court of Justice of the European Union doctrine and case law on tax harmonisation and the chargeable event in inheritance matters.

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