The NIF is Portugal's tax identification number. Foreign residents and non-residents use it for tax records, employment, leases, banking, utilities, and many contracts. You can request it in person or have an authorised representative handle an eligible online request.
Where can a foreign citizen request a NIF?
The direct route is an appointment at a Serviço de Finanças tax office or a Loja do Cidadão that handles Tax Authority services. The office registers you as a taxpayer and assigns the NIF. Check the Portal das Finanças appointment instructions before visiting because not every citizen shop offers the same services.
A legal representative can submit a foreign citizen's request through the Portal das Finanças e-balcão. The representative signs in with their own credentials and files the request under the taxpayer registration and identification options. This route is useful when you need the NIF before arriving, but it requires a power of attorney that clearly authorises the representative to request it.
Do not confuse a legal representative who submits the application with a fiscal representative responsible for tax communications. Whether you need ongoing fiscal representation depends on where you live and your tax situation. Assignment of the NIF and appointment of a fiscal representative are separate decisions.
Which documents should you prepare?
Bring a valid passport or accepted civil identification document. A third-country national applying in person may also need evidence of lawful entry. If your identification does not show your current address, include a document proving your address abroad or in Portugal, depending on how you are registering.
For a representative request, add the representative's identification and the power of attorney. The Tax Authority requires foreign-language documents to be translated and supplied as certified copies where applicable. Names, document numbers, and addresses should match across every attachment.
Residents should also bring the residence document that supports their Portuguese status. Non-residents are registered with an address outside Portugal until a valid address change is completed. Do not provide a temporary Portuguese address merely to make the application look simpler, because the recorded tax address affects later communication and tax-residence checks.
What should you do after the NIF is issued?
Request access credentials for Portal das Finanças and confirm the name, address, and residence status shown in your taxpayer record. The portal is used for tax notices, address actions, invoices, and later filings. Keep the NIF assignment document in your relocation folder, but avoid sending a full identity document and NIF together unless the recipient genuinely needs both.
If you later become resident in Portugal, update the tax address through the official Tax Authority process. An address request may require confirmation using a code sent by post. Starting the request is not the same as completing that confirmation.
Foreign nationals with a Portuguese address may also qualify for the government service that requests the NIF, NISS, and SNS user number together. Check the live gov.pt eligibility rules before choosing that route.
Common misconceptions
A NIF is not a residence permit, work authorisation, social security number, or SNS health number. It identifies you to the Portuguese Tax Authority. Receiving one does not make you a Portuguese tax resident by itself.
Another mistake is paying an unofficial provider without checking whether you can use a Tax Authority appointment or the government joint service. A paid representative may be convenient, but the NIF itself is assigned by the public authority.
Summary
Request the NIF through Finanças, an eligible Loja do Cidadão, or an authorised representative using e-balcão. Prepare matching identification and address evidence, plus residence documents or a power of attorney where required.
After assignment, activate Portal das Finanças access and verify the recorded address and status. Keeping that record accurate prevents problems when you sign a lease, start work, open services, or complete later Portuguese registrations.
Sources
Next in Country To Live: Browse rankings