NIF for Inheritance in Portugal: What UK Heirs Need to Get and Why

No NIF, no inheritance. That is the blunt reality of Portuguese estate settlement for UK heirs. Without a Portuguese tax identification number (Número de Identificação Fiscal), you cannot file the mandatory Modelo 1 stamp duty declaration, access frozen bank accounts, transfer property, or do any meaningful business with Portuguese tax authorities.

The complication is that you may need not one NIF, but up to three — and the process for non-resident UK citizens is different from the one for Portuguese residents.

The Three NIFs You May Need

1. Non-resident NIF for each heir. Every person who will inherit Portuguese assets — the surviving spouse, adult children, siblings — needs their own individual NIF. If the deceased was the only one in the family with a Portuguese tax number, each heir must apply for a new non-resident NIF before the estate can move forward.

2. NIF for the Cabeça de Casal (Head of the Estate). The head of the estate is responsible for the required tax filing and needs their own NIF (same as above). Their role must also be formally recognised for the relevant estate procedures.

3. NIF for the Herança Indivisa (Undivided Inheritance). When multiple heirs share the estate and the assets have not yet been formally divided among them, the undivided estate may require its own NIF before tax filings can be submitted. This collective tax number is used for relevant estate transactions until the estate is formally partitioned.

Not every inheritance needs all three. If the deceased had no Portuguese property and only a bank account, the individual heir NIFs and the Modelo 1 filing may be sufficient. If there is property and multiple heirs, the Herança Indivisa NIF becomes essential.

How UK Citizens Apply for a Non-Resident NIF

Non-residents can request a Portuguese NIF without first appointing a fiscal representative. If a non-resident establishes a legal tax relationship in Portugal — for example, by owning Portuguese real estate — they must follow the current Finanças rule: appoint a fiscal representative or use an approved electronic-notification channel.

There are two ways to do this:

In person at a Finanças office, if you are in Portugal (or can travel there). Bring your British passport and proof of your UK address, and check the appointment and supporting-document requirements with Finanças. You do not need a power of attorney if you apply yourself.

Remotely through a lawyer or authorised representative. A Portuguese lawyer or other authorised representative can submit the NIF application on your behalf. Ask them and Finanças what power-of-attorney and legalisation documents are required for your route; processing time depends on the route.

Some online services advertise NIF registration for non-residents at €100–€200. These work, but read the terms carefully: some include ongoing fiscal representative fees (€50–€150/year) that continue indefinitely.

The Fiscal Representative Obligation

Appointing a fiscal representative is not automatically required just to obtain a NIF. If a non-resident establishes a legal tax relationship, the applicable Finanças rule may require a representative or an approved electronic-notification channel. A representative receives Portuguese tax correspondence on your behalf, including penalty notices and filing reminders.

If a representative or electronic-notification channel is required and neither is in place, Finanças can restrict the exercise of tax rights and impose penalties. Confirm the applicable route before filing.

For a one-off inheritance, ask the Portuguese lawyer or notary handling the estate whether a fiscal representative or electronic-notification channel is appropriate, and how any appointment should be updated when the estate is settled.

The Three-Month Deadline Pressure

All of this NIF work is time-pressured by the Modelo 1 stamp duty deadline. The Cabeça de Casal must file the Modelo 1 with Finanças by the end of the third month following the month of death. Filing requires the Cabeça de Casal's NIF and may also require the Herança Indivisa NIF.

Direct heirs — spouse, children, parents — are exempt from the 10% stamp duty, but the filing itself is mandatory regardless of the exemption. Missing the deadline triggers automatic penalties and interest.

The three-month deadline is a statutory filing deadline; plan to meet it rather than assuming an extension is available. Starting the NIF process immediately is the safest approach.

The British Person Dies in Portugal — Family Emergency Guide includes the NIF application checklist and a template power of attorney for appointing a fiscal representative where one is required.