Getting your NIF and NISS in Portugal (tax & social security numbers)
Your NIF (tax number) is the master key in Portugal — you need it to rent, open a bank account, work, and access healthcare. Your NISS is the social security number you need to work and contribute. With an address, the NIF, NISS, and SNS number can often be requested together.
NIF — your tax number
The NIF (número de identificação fiscal) is issued by Finanças (the tax office), free of charge and usually the same day, on presentation of your passport and proof of address. If you are still abroad, you can obtain one through the finance portal's e-balcão or by appointing a fiscal representative.
NISS — social security
The NISS (número de identificação de segurança social) lets you work and pay contributions. Apply online through Segurança Social Direta, have your employer apply on your behalf, or apply in person with a work contract; you receive the number by registered post.
Step by step
- 1Get your NIF
Visit any Finanças office (or use a fiscal representative if abroad) — free and usually same-day.
- 2Secure proof of address
A rental contract, property deed, or an atestado de residência from your junta de freguesia.
- 3Apply for your NISS
Through Segurança Social Direta, your employer, or in person with your work contract.
- 4Request your SNS number
Often possible alongside the NIF and NISS once you have an address (see Healthcare).
Documents you'll need
- Passport / residence permit
- Proof of addressRental contract, deed, or junta de freguesia certificate.
- Work contractFor a NISS obtained through employment.
- Fiscal representative detailsNon-residents, if applying from abroad.
Estimated costs
| Item | Low | Average | High |
|---|---|---|---|
| NIF issuance (at Finanças) | €0 | €0 | €0 |
| Fiscal representative service (optional, remote) | €50 | €100 | €150 |
| NISS issuance | €0 | €0 | €0 |
| Atestado de residência (junta de freguesia) | €0 | €10 | €20 |
Estimates only — actual costs vary by city, provider, and personal circumstances.
Typical timelines
Official sources
Frequently asked questions
It helps — you need it to sign a lease or open a bank account. Non-residents can get one remotely via a fiscal representative or the finance portal.
Yes, at a Finanças office. Third-party services charge a convenience fee for handling it for you.
Once you have an address in Portugal, these can often be requested together — check the gov.pt migrant services page.
This guide is informational and may change. It is not legal, tax, or immigration advice. Always confirm requirements with the official sources above or a licensed professional.