Deadline to Pay Inheritance Tax in Spain and Extensions

🇪🇸 Read the original in Spanish

Losing a loved one is a painful and complex process in which, unfortunately, bureaucratic and tax obligations offer no respite. In Spain, receiving an inheritance carries the obligation to settle the Impuesto sobre Sucesiones y Donaciones (ISD - Inheritance and Gift Tax), a tax that often generates great anxiety due to its strict deadlines and the differing criteria among the various Comunidades Autónomas (Autonomous Communities/regions). Understanding precisely how much time you have to file this tax, how to legally request an extension, and what the consequences of a delay are is essential to avoid unnecessary penalties and surcharges that can severely increase the cost of the probate process.

The Regulatory Framework of Inheritance Tax in Spain

The Inheritance and Gift Tax is a direct and subjective tax levied on wealth increases acquired free of charge by natural persons. Its basic regulation is found in Ley 29/1987, de 18 de diciembre, del Impuesto sobre Sucesiones y Donaciones (hereinafter, LISD) and its implementing regulation, Real Decreto 1629/1991, de 8 de noviembre, which approves the Reglamento del Impuesto sobre Sucesiones y Donaciones (RISD - Inheritance and Gift Tax Regulations).

Although the state framework defines the basis of the tax, the management, settlement, and, very significantly, the capacity to regulate reductions, allowances, and tax rates are devolved to the Comunidades Autónomas. This means that the actual cost of an inheritance varies drastically depending on whether the deceased resided in, for example, Andalusia, Madrid, Catalonia, or Galicia.

For civil purposes, the acquisition of assets is governed by the Código Civil (Civil Code, especially Articles 988 and following regarding the acceptance and repudiation of inheritance), but the tax obligation arises autonomously and independently of whether the inheritance has been formally accepted or is in a state of herencia yacente (unaccepted/lying estate).

The General Deadline to Pay Inheritance Tax

According to Article 67.1.a) of the Reglamento del Impuesto sobre Sucesiones y Donaciones, the general deadline to file the self-assessment or tax return is six months, counting from the date of the deceased's death (the decesus) or from the date on which the declaration of death becomes final.

This deadline is identical throughout the national territory, regardless of which Autonomous Community is competent for the tax settlement.

How is the deadline calculated exactly?

The calculation of the deadline is done from date to date. If the deceased passes away on May 15, the deadline to file and pay the tax (or request an extension) ends on November 15 of the same year. If the month of expiry does not have an equivalent day to the starting date, the deadline will expire on the last day of that month. If the last day of the period is a non-working day (Saturday, Sunday, or a public holiday), the deadline is moved to the next working day.

Extending the Deadline: Requirements and How to Apply

Spanish legislation is aware that gathering the documentation for an inheritance (will, certificates, bank balances, property deeds) can be a slow process, especially if there are discrepancies among the heirs or if the deceased owned a complex estate. Therefore, Article 68 of the Regulations (RISD) contemplates the possibility of requesting an extension of the filing deadline.

Requirements for Granting the Extension

For the regional tax administration to grant the extension, the following conditions must be strictly met:

1. Application deadline: It must be requested within the first five months of the general filing period. If it is requested in the sixth month, it will be automatically rejected as out of time.
2. Justification: A reasonable motive must be alleged that hinders the settlement (for example, delay in obtaining the Certificado de Últimas Voluntades (Certificate of Last Wills), locating heirs abroad, a complex inventory of assets, or litigation regarding the validity of the will).
3. Identification: The application must include the name and NIF (tax identification number) of the deceased, of the applying heirs, their degree of kinship, and an approximate inventory of the known assets.

Duration and Effects of the Extension

If granted, the extension will be for an additional period of six months. This means that the heirs will have a total of twelve months from the date of death to file the tax.

Attention! The granting of the extension is not free. Its approval implicitly carries the obligation to pay intereses de demora (late-payment interest) from the day following the expiry of the initial six-month period until the date the document or tax return is filed. The late-payment interest rate is set annually in the Ley de Presupuestos Generales del Estado (State General Budgets Law, which for the current year is set at 4.0625% per annum).

If the Administration does not expressly reply to the extension request within one month of its submission, it will be deemed granted by positive administrative silence.

Practical Step-by-Step Steps to Settle the Tax

To avoid getting lost in the bureaucracy and to prevent the six-month deadline from expiring, it is recommended to follow this order of action:

1. Obtaining initial certificates: Once 15 working days have passed since the death, you must request the Certificado de Defunción (Death Certificate) from the Registro Civil (Civil Registry), and subsequently, the Certificado de Actos de Última Voluntad (Certificate of Last Wills) and the Certificado de Contratos de Seguros de cobertura de fallecimiento (Life Insurance Certificate) from the Ministry of Justice or online.
2. Obtaining an authorized copy of the will: With the certificate of last wills, you must go to the Notary's office where the last will was signed to request an authorized copy. If there is no will, you must initiate the declaration of heirs abintestato (intestate) before a Notary.
3. Inventory and valuation of assets: Request certificates of balance as of the date of death from the banking entities where the deceased held accounts or securities. Likewise, you must compile the deeds of real estate properties and calculate their Valor de Referencia (Reference Value) from the Dirección General del Catastro (Cadastral Registry), which constitutes the minimum tax base.
4. Drafting the partition document or inheritance declaration: This can be public (a notary deed of acceptance and adjudication of inheritance) or private (a private document of inheritance declaration), the latter being valid if properties are not going to be registered in the Registro de la Propiedad (Land Registry) immediately.
5. Completing the tax forms: Fill out the corresponding form of the competent Autonomous Community (usually Modelo 650 for individual self-assessment and Modelo 660 for the inheritance declaration).
6. Payment and submission: Pay the tax at a collaborating bank (if there is tax due) and submit all documentation (forms, will, certificates, deeds) to the competent Oficina Liquidadora (Tax Clearing Office) either physically or online.

Practical Examples of Deadlines and Late-Payment Costs

To better understand the impact of deadlines and extensions, we analyze two common scenarios:

Example 1: Extension requested within the deadline

• Case: Don Manuel passes away on January 10, 2024. His son Carlos is the sole heir.
• General deadline: Carlos has until July 10, 2024, to file the tax.
• Extension request: Due to difficulties in valuing some shares abroad, Carlos requests an extension on May 15, 2024 (within the fifth month).
• Resolution: The Administration grants the extension. The new deadline is January 10, 2025.
• Result: Carlos files and pays a tax liability of €12,000 on November 10, 2024 (four months late relative to the original deadline). In addition to the €12,000, he must pay the late-payment interest corresponding to those 4 months (approximately €162.50 calculated at 4.0625% annual interest).

Example 2: Late filing without an extension

• Case: Doña Sofía passes away on February 5, 2024. Her heirs do not request an extension and, due to an oversight, file the self-assessment on November 5, 2024 (three months late).
• Tax liability: The tax amounts to €5,000.
• Consequence: Since no extension was requested, a surcharge for late filing without prior notice applies (according to Article 27 of the Ley General Tributaria - General Tax Law). For a delay of 3 months, a surcharge of 3% is applied (plus interest if it exceeds 12 months).
• Result: The heirs will pay the €5,000 tax liability plus a surcharge of €150. If the Administration had formally requested payment before they filed voluntarily, they would face penalties of between 50% and 150% of the amount due.

Mistakes You Must Avoid

• Leaving the extension request until the last month: Requesting the extension in month six (for example, on June 10 for a death on January 10) leads to an automatic rejection by legal mandate. The law requires it to be requested within the first five months.
• Ignoring the Cadastral Reference Value: Since January 1, 2022, the taxable base of real estate is the Valor de Referencia de Catastro. Declaring below this value to save on taxes will trigger automatic complementary tax assessments with interest and potential penalties.
• Not settling the tax because the inheritance has not been accepted: The tax obligation arises upon death, not upon signing the deed of acceptance. Even if the inheritance is not accepted, the designated heirs must file the tax return to avoid surcharges.
• Choosing the wrong Autonomous Community: The tax must be filed in the Autonomous Community where the deceased had their habitual residence (where they lived the most days in the last five years prior to death), not where the real estate is located or where the heirs reside (except for non-residents in Spain, who are governed by state regulations but have the right to apply the rules of the region where the highest value of the assets is located).

Frequently Asked Questions (FAQ)

What happens if I do not have the money to pay the Inheritance Tax?

If you lack liquidity, you can request the deceased's bank to release funds from the deceased's bank accounts exclusively for the payment of the tax (Article 80 of the RISD expressly allows this). You can also request a deferral or installment plan from the corresponding regional tax agency, which must be submitted within the six-month period from the date of death.

Can I lose regional tax allowances if I file late?

Yes, this is one of the greatest dangers. In many Autonomous Communities (such as Madrid, Andalusia, or the Valencian Community), the enjoyment of 99% tax allowances for direct relatives is conditioned by their own regulations on the tax being filed within the legal deadline (including the extension if it was correctly requested). Filing just one day late can mean going from paying a symbolic amount to having to pay thousands of euros.

What happens if the deceased was a non-resident in Spain?

If the deceased did not reside in Spain, the competence to settle the tax belongs to the State Tax Agency (Agencia Estatal de Administración Tributaria - AEAT), specifically the Oficina Nacional de Gestión Tributaria in Madrid. However, thanks to rulings by the Court of Justice of the European Union and subsequent legal reforms, heirs have the right to apply the regulations of the Autonomous Community where the highest value of the estate's assets is located, thereby avoiding tax discrimination. The deadline remains six months.

Can the statute of limitations for the tax be interrupted?

Inheritance Tax prescribes after four years, six months, and one day from the date of death (the four-year general limitation period of the Ley General Tributaria plus the six-month voluntary filing period). Any formal request from the Administration, extension application, or initiation of a tax audit interrupts this period, causing the clock to start counting from zero again.

In Summary

• The general deadline to file and pay Inheritance Tax in Spain is six months from the date of death.
• An extension can be requested for an additional six months (totaling twelve months), provided it is requested within the first five months of the period.
• The extension accrues late-payment interest in favor of the Public Treasury (currently at 4.0625% per annum) for the extended period.
• Filing the tax late without having requested an extension leads to late-filing surcharges of between 1% and 15% (if voluntary) or penalties of up to 150% (if there is a prior official notification).
• A delay in filing can cause the total loss of regional tax allowances, multiplying the cost of the inheritance.

General legal information, not personalised legal advice. For your specific situation, ask your question for free at AbogadoAI — answers grounded in Spanish law (BOE), in English.

This is general information, not legal advice. Verify on the BOE or consult a lawyer for your specific case.