Getting a NIF number in Portugal for non-residents is essential for financial and legal activities, including opening a bank account, signing rental contracts, and paying taxes. The Número de Identificação Fiscal (NIF) can be obtained through a tax office, online services, or with the help of a tax representative if you reside outside the EU. Required documents typically include a passport and proof of address. Having a NIF simplifies transactions, making it easier to invest, work, or live in Portugal. Securing one early ensures a smooth relocation or business setup process.