The Portuguese tax number, and the representative rule that changed

What the number is, and who issues it

A Portuguese tax number is required before any property purchase, bank account or utility contract. It is issued by the Autoridade Tributária e Aduaneira. A person who is not resident in Portugal may be registered with a foreign address, in which case the register records them as a non-resident.

That last point does more work than it looks. The address held on the register, not the passport, is what decides whether the representative question arises at all.

The fiscal-representative rule changed in 2022

Decreto-Lei n.º 44/2022, de 8 de julho amended art. 19.º of the Lei Geral Tributária. The obligation to appoint a fiscal representative does not apply to a taxpayer who adheres to one of the dematerialised notification channels. Three are named:

• the public electronic notification service tied to the Morada Única Digital;
• the regime of electronic notifications and summonses on the Portal das Finanças;
• the caixa postal eletrónica, ViaCTT.

Two further points are misreported almost as often as the headline. First, the mere attribution of a NIF to a non-resident with a third-country address does not itself trigger the obligation — it attaches once a tax relationship exists, which in practice means owning property, earning Portuguese-source income, or registering for VAT. Second, the change did not abolish the representative. It made the representative one of two ways of being reachable by the tax authority, and left the other one free.

Dropping a representative is harder than appointing one

For a taxpayer resident outside the EU or the EEA, cancelling adherence to the electronic notification channel only takes effect once a fiscal representative has first been designated. The representative cannot simply be dropped and the electronic channel switched off in the same movement; the order runs the other way.

This is the sentence that matters to an owner who appointed a representative years ago and now wants to stop paying one. The exit exists. It runs through the notification channel, not through a letter to the representative.

Where the sources disagree

The substance above is not in dispute. The citation is. Older practitioner material places the waiver at art. 19.º n.º 8 and n.º 10 of the Lei Geral Tributária. In the consolidated text following Decreto-Lei n.º 44/2022 the relevant provisions appear instead at n.º 14, on the caixa postal eletrónica, n.º 15, carrying the waiver itself, and n.º 16, on the condition attached to cancelling adherence for residents outside the EU and EEA.

The second reading is the more likely one for the current consolidated text. Neither was confirmed by opening the consolidated Lei Geral Tributária directly for this page, so both are stated here and the conflict is left standing. The rule is identical under either numbering; only the paragraph reference moves.

What is regional about this, and what is not

Nothing about the number itself. The Autoridade Tributária e Aduaneira is a national body, the NIF is a national instrument, and Madeira operates no separate tax-number route. A guide that describes a Madeira-specific NIF procedure has invented a difference.

What is regional arrives later, once a person is tax resident in the Region: the Autonomous Region of Madeira applies its own IRS rate table in place of the general one, which is where the island stops resembling the mainland. That table, and the regime that replaced non-habitual residence, are covered in what IFICI replaced NHR with. The number is also the first item a bank asks for, so it comes before opening a Portuguese account, and before the sequence set out in how a purchase actually runs.