Succession: the tax is not due if the will is revoked

With judgment no. 14063 of May 27, 2025, the Italian Supreme Court (Corte di Cassazione) addressed a question that had previously lacked a specific and systematic precedent: Is inheritance tax still due when a will is later revoked and the inheritance is never actually acquired by the person who filed the inheritance declaration?

The Court answered in the negative, affirming a legal principle that ensures consistency between tax law and the civil law rules governing succession.

The case: will revoked by subsequent dispositions

The case at the origin of the dispute is emblematic.

An individual, appointed as universal heir under a holographic will, had submitted a proper inheritance declaration. However, two later holographic wills—both dated after the first and in favor of another person—were subsequently published.

According to Article 682 of the Italian Civil Code, this resulted in the implied revocation of the earlier dispositions due to incompatibility with the new testament.

Nonetheless, the Italian Revenue Agency (Agenzia delle Entrate) issued an inheritance tax assessment to the first individual, based on the declaration already filed.

The taxpayer challenged the assessment, arguing that the conditions for taxation no longer existed, as he no longer held any legal title or status as heir.

The relevant legislation: Legislative Decree 346/1990 and the notion of “taxable event”

Article 1, paragraph 1, of Legislative Decree No. 346 of October 31, 1990 (Consolidated Law on Inheritance and Gift Tax – TUS) defines the taxable event for inheritance tax as: “the transfer of assets and rights by reason of death.”

However, the law does not clarify whether such transfer must be:

• merely potential, based on hereditary entitlement, or
• actual, based on the effective acquisition of assets by the individual designated by will or by law.

According to tax authority practice, the filing of a declaration and the absence of renunciation are sufficient to justify taxation. But the Court has now reaffirmed a key point: abstract entitlement alone is not enough.

The Court’s decision: retroactive effect of revocation and lack of tax capacity

In this ruling, the Supreme Court held that: “The revocation of a will, even if implied, retroactively nullifies the effectiveness of previous dispositions, resulting in the loss of heir status by the originally appointed individual.”
As a result, the taxable event cannot be considered to have occurred, because:

• there was no mortis causa transfer of assets to the revoked heir, and
• the inheritance was never actually acquired.

The inheritance declaration carries only declaratory—not constitutive—value. If the objective requirement for taxation is missing, the tax obligation cannot arise or be maintained.
The Court also cited Article 53 of the Italian Constitution, which states: “Everyone shall contribute to public expenses according to their ability to pay.”

Where there is no enrichment, taxation is not permissible.

The tax authority’s position: implied acceptance and presumption of validity

In court, the Italian Revenue Agency argued that:

• the inheritance declaration, together with a legal claim to heir status, constituted acceptance of the inheritance;
• this was sufficient to trigger taxation, even if the inheritance was later excluded due to will revocation.

However, the Supreme Court rejected this reasoning, stating: “Although the taxpayer submitted the declaration, he never acquired heir status, as the legal basis (the will) was invalid from the outset.”

Revocation of a will: civil and tax implications

Under civil law, a will may be revoked:

• expressly (Article 679 Civil Code), or
• implicitly, when a new will contains provisions incompatible with the previous ones (Article 682 Civil Code).

The effect is the retroactive nullification of earlier provisions, which:

• cease to produce legal effects, and
• can no longer serve as the basis for inheritance rights.

For tax purposes, this means that:

• there is no longer a taxable transfer to the previously appointed heir;
• the taxable event did not occur.

Practical implications: new declaration and new taxpayer

The Court clarified that the tax may only be claimed:

• from the newly designated heir,
• provided that the person accepts the inheritance, and
• files a new inheritance declaration in their own name.

In practice:

• the first individual loses heir status;
• the declaration submitted by that person has no tax effect;
• the tax liability applies to the actual testamentary successor, based on the values and legal positions as determined at the time the succession opened.

Final remarks: safeguarding legality and tax capacity

This ruling goes beyond the specific case and represents an important systemic precedent. It reaffirms that the tax obligation must be based on:

• the actual enrichment resulting from succession,
• the validity and effectiveness of testamentary dispositions, and
• the true status of heir of the person subject to taxation.

This is a protective ruling that restores the centrality of the principles of tax legality and contributive capacity, as also emphasized in the Court’s reasoning.

Judgment no. 14063/2025 clarifies a fundamental point: the inheritance declaration alone is not sufficient to justify taxation if the inheritance was never actually acquired.

The revocation (whether express or implied) of a will retroactively nullifies any inheritance entitlement and prevents the tax obligation from arising. A principle as simple as it is essential for the proper exercise of taxation powers and the protection of taxpayers.

The matter remains complex, and it is always advisable to seek the assistance of professionals such as those at Agenzia delle Successioni to avoid costly errors.