Tax Affection on Inherited Properties: Spanish Supreme Court (6 April 2026) Holds the Buyer Liable Even After the Land Registry Note Lapses
The Spanish Supreme Court changes the rules: if you buy an inherited property while the tax affection note is in force in the Land Registry, you will be liable for the unpaid Inheritance Tax even after the note expires. Full analysis of the judgment and consequences for buyers on the Costa Blanca.
A judgment that changes the way inherited properties are bought
On 6 April 2026, the Spanish Supreme Court issued a landmark ruling for the property market: the buyer of an inherited home is liable, with the property itself, for the unpaid Inheritance Tax owed by the heir, provided that, at the time of purchase, the tax affection note was in force in the Land Registry — even if that note expires years later.
The doctrine prioritises the public tax credit over legal certainty in property transactions and forces buyers to apply maximum due diligence when purchasing a home with a recent inheritance origin, especially in areas with high international succession volume like the Costa Blanca, Torrevieja, Orihuela Costa, Moraira and Calpe.
1. What is the tax affection of an inherited property?
When real estate is inherited in Spain, the property is legally affected as security for the payment of the Inheritance and Gift Tax (ISD). It is a statutory in rem guarantee in favour of the regional tax authority: if the heir does not pay, the Administration may pursue the asset regardless of who currently owns it.
To make this charge public, the Land Registry automatically registers a marginal tax affection note valid for five years, in accordance with Article 5 of the ISD Act and Article 122 of its Regulation.
> Key idea: the marginal note does not create the guarantee — it only publishes it. The tax liability arises with the inheritance and exists even if the note had never been registered.
2. The conflict that reached the Supreme Court
The factual pattern is classic and constantly repeated in practice:
- An heir receives a property and becomes liable for the Inheritance Tax.
- The Land Registry records the tax affection note for five years.
- Before those five years expire, the heir sells the property to a third party.
- The heir fails to pay the tax and is declared insolvent.
- Years later — when the marginal note has already lapsed — the Tax Office starts a subsidiary liability derivation against the new owner to recover the debt against the property itself.
The buyer challenged the claim, arguing that at the time of enforcement the note was no longer in force in the Registry and that the public faith of the Registry should protect them.