Why you need a NIF before almost anything else
The NIF (Número de Identificação Fiscal) is Portugal's tax identification number. It's a nine-digit number that follows you through almost every administrative process in Portugal — opening a bank account, signing a rental contract, enrolling a child in school, claiming education tax deductions, and registering with the health system.
Most schools will ask for your NIF during enrolment. Without it, school fees won't appear on your e-fatura tax record, which means you lose the education deductions at year-end. Getting it early — ideally before you arrive — removes a bottleneck that delays everything else.
Who needs a NIF
Each person needs their own. You, your partner, and your children each need an individual NIF. Schools will ask for the parent's NIF for billing and for the child's NIF for enrolment records. There's no age restriction — you can get a NIF for a newborn.
Option 1: Get it before you arrive (recommended)
EU and EEA citizens can apply at Portuguese consulates in their home country. Non-EU citizens need to appoint a fiscal representative in Portugal — a Portuguese resident (a lawyer, accountant, or trusted contact) who will formally take responsibility for your tax correspondence until you arrive and become a resident yourself.
Several services online facilitate this: they act as your fiscal representative, handle the paperwork remotely, and send you your NIF number by email within a few working days. Costs vary but are typically €50–€150 per NIF through these services. For a family of four, that's €200–€600 — worth it to avoid delays.
Option 2: Get it in person at a Finanças office
Once you're in Portugal, you can visit any Autoridade Tributária e Aduaneira office (Finanças / AT) with your passport. EU/EEA citizens can get a NIF on the spot. Non-EU citizens need proof of address in Portugal and, if not yet a resident, a fiscal representative.
Walk-in queues at Finanças offices in Lisbon and Porto can be long. Book an appointment online at portaldasfinancas.gov.pt — this saves hours. Some offices have early morning slots that clear faster.
Documents required
- Valid passport or national ID (EU citizens)
- Proof of address in Portugal (rental contract, utility bill) — or a fiscal representative if applying from abroad or before you have an address
- For children: birth certificate (apostilled if issued outside EU)
- If using a fiscal representative: their NIF and written authorisation
What happens after you get it
Your NIF is permanent — it doesn't expire and doesn't change if you move address. Once you have it, give it to every institution you interact with: school, doctor, landlord, utility provider. This ensures all your expenses are captured in the e-fatura system and eligible for tax deductions.
To claim education tax deductions on your annual IRS return, you need your child's NIF on every school invoice. Make sure the school records it correctly from day one — correcting invoices retrospectively is possible but tedious.
After the NIF: what's next
With NIFs in hand, the typical sequence for a newly arrived family is: open a Portuguese bank account → register at the local Junta de Freguesia (getting a certificate of residence) → register children with a local health centre (Centro de Saúde) → finalise school enrolment. The NIF is the key that unlocks all of these.
Use Skolvi to shortlist schools while you're handling the admin — knowing which schools you're targeting helps you prioritise which area to look for housing in, since proximity to school matters more in Lisbon and Porto than in smaller cities.