Portugal's 2026 Undivided Inheritance Reform: What Expat Heirs Need to Know

When someone dies in Portugal, the estate does not instantly split among the heirs. Between the death and the formal partition (Partilha), the entire estate exists in a legal limbo called heranca indivisa — an undivided inheritance where all heirs collectively own everything but no individual heir owns any specific asset.

This status can last years when heirs disagree, live in different countries, or simply cannot coordinate. Portugal's 2026 Housing Reform introduced major changes to break these deadlocks and prevent inherited properties from sitting abandoned.

What Changed in 2026

The Two-Year Forced Sale Trigger

Under the new rules, if an estate remains undivided for at least two years from the date of death (or from the execution of the Habilitacao de Herdeiros), any co-heir who holds a recognized share can petition for a forced sale or buyout of the inherited property.

This means a single heir can force the issue. If three siblings inherit a Lisbon apartment and one refuses to sell or buy out the others, the remaining heirs no longer need that sibling's cooperation. After two years, any heir can initiate the forced sale process through a notary or the civil courts.

Before 2026, the only option was a full Processo de Inventario (judicial inventory), which could drag on for years and cost thousands in legal fees.

Voluntary Indivision Agreements

Heirs who collectively agree to keep the estate undivided can now formalize that decision through an authenticated private document. The agreement lasts a maximum of five years and can be renewed.

This is useful when heirs want to keep a family property but need legal clarity — for example, agreeing that one sibling will live in the house and maintain it while the others retain their ownership shares.

Expedited Mediation

The reform actively pushes heirs toward mediation before litigation. Specialized mediation services under the 2026 guidelines are designed to conclude within two to four months, at a fraction of the cost of a judicial process that historically took several years.

If mediation fails, the formal court process remains available. But courts now expect heirs to demonstrate they attempted mediation first.

How Undivided Inheritance Works Day-to-Day

During the undivided period:

• The Cabeca de Casal manages the property. They are responsible for maintenance, insurance, tax payments (IMI), and any necessary repairs. They can rent the property with the consent of the other heirs.
• No heir can sell their share to a third party without offering the other heirs the right of first refusal (direito de preferencia).
• Rental income and expenses are shared among all heirs according to their inheritance shares.
• The estate has its own NIF. The Tax Authority issues a separate tax number for the heranca indivisa, which is used for all tax filings during the undivided period.

Co-Heir Disputes: Your Options

When heirs cannot agree on what to do with inherited property, the 2026 reform gives you a clearer path:

Year 0-2: Try to reach agreement among all heirs. The Cabeca de Casal manages the property and files taxes. Any heir can request mediation at any time.

After Year 2: Any heir can petition for a forced sale or buyout. The petitioning heir does not need the consent of the others — only a recognized share in the estate and proof that two years have passed.

Forced sale process: The property is typically sold at public auction, though heirs have the right to match the highest bid. Proceeds are divided according to each heir's share, minus costs.

Buyout option: If one heir wants to keep the property, they can offer to buy out the others at fair market value. If the others agree, the transfer is executed at a notary. If they disagree on value, an independent valuation (pericia) is ordered.

Practical Implications for Expat Families

The reform particularly affects expat families where heirs are scattered across countries:

• A UK-based heir and a Portugal-based heir who cannot agree on selling a property now have a clear two-year clock. Neither party can indefinitely block the other.
• Properties at risk of abandonment — a common problem when all heirs live abroad and nobody wants to manage upkeep — can now be resolved faster through forced sale.
• The mediation requirement means lower costs for the first attempt at resolution. Full litigation remains the backstop, but most cases should resolve through mediation or the forced sale mechanism.

If you are dealing with co-heir disagreements or need to understand your options during the undivided period, the Portugal Expat Death Guide covers the full partition process with timelines, cost breakdowns, and strategies for cross-border coordination.

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