NIF
Published 6 November 2026, 09:07
Número de Identificação Fiscal
A personal tax number, the equivalent of a tax ID. It is issued by the tax authority, the Autoridade Tributária, known in everyday speech as Finanças. You can hardly do anything in Portugal without it: rent a flat, open a bank account, buy a SIM card, take out insurance, buy a home. Children have one too, even newborns.
Where you come across it. You get it free of charge at a Finanças office or a Loja do Cidadão with your passport.
While you live outside the EU and the EEA, a tax representative is usually attached to your NIF, or electronic notifications are switched on instead. After moving, you need to change the address on your NIF to a Portuguese one: otherwise letters from the tax office, including the password for your online account, will go to your old address abroad.
Official website: portaldasfinancas.gov.pt
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