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Understanding Portuguese Bureaucracy and the Documents You Need

Researched and written with AI tools from official sources. How we make our guides

The numbers and documents you need after moving to Portugal, in the order to get them, which office issues each one, and what each costs.

The Portugal Brief 8 min read

Understanding Portuguese Bureaucracy and the Documents You Need

Last verified: October 2026.

Who this is for

  • You have just moved to Portugal, or are about to, from inside or outside the EU.
  • You want to know which numbers and documents you need, and in what order.
  • You want to know which public office handles what.

Not for you if: you still need to choose a visa. Read Visas and Residency in Portugal instead.

Most of Portuguese bureaucracy runs on three numbers: your tax number (NIF), your social security number (NISS), and your health service user number. Get the NIF first, because almost everything else asks for it. All three are free. Then you need a right to live here: an EU registration certificate from the town hall if you are from the EU, or a residence permit from AIMA if you are not. This guide shows each step, who handles it, and where to read the full guide.

The order that works

  1. Get a NIF. You can start from abroad.
  2. Open a bank account. Landlords, employers, and utilities will want one.
  3. Register your residence. EU citizens go to the town hall. Non-EU citizens go to their AIMA appointment.
  4. Get a NISS, if you will work, be self-employed, or claim a benefit.
  5. Register at your health centre for a health user number and a family doctor.
  6. Activate the Chave Móvel Digital, the state's free digital login.

Some foreign residents can get the NIF, NISS, and health number in a single visit. See the section on the three numbers at once below.

The three numbers

Tax number (NIF)

Your NIF (número de identificação fiscal) is your tax number. It has nine digits and stays yours for life. You can hold only one. Banks, landlords, energy companies, and employers all ask for it, and you need it at your AIMA appointment. Asking for one is free.

  • In Portugal: book an appointment at a tax office (Serviço de Finanças) or a citizen shop. You usually leave with the number.
  • From abroad: someone in Portugal with your power of attorney files the request online for you.

You do not need a fiscal representative to get a NIF. A representative only becomes necessary later, in some cases, if you live outside the EU and EEA and have dealings with the tax office. The full rules are in Getting a NIF (Tax Number) in Portugal and Appointing a Fiscal Representative in Portugal.

Give your NIF when you pay. Ask for your number on the invoice ("com contribuinte, por favor"). Invoices with your NIF count towards your income tax deductions. General family expenses earn a deduction of 35%, up to €250 per taxpayer per year.

Social security number (NISS)

Your NISS (número de identificação da segurança social) is your number with Segurança Social. You need it to work, pay contributions, and claim benefits.

  • If you have a job, your employer can request it after you sign your contract.
  • Otherwise, you request it online on the Segurança Social website. You need a reason linked to social security, such as a work contract, self-employment, or a benefit claim.

The steps and documents are in Getting a Social Security Number (NISS) in Portugal.

Health service user number

Your health user number (número de utente) identifies you in the National Health Service (Serviço Nacional de Saúde, SNS). Every legal resident can have one, and registration is free. You register in person at the health centre (centro de saúde) for your address, and get the number at the same visit.

Bring:

  • your passport or ID card;
  • your residence document (EU registration certificate or residence permit);
  • your NIF;
  • proof of address.

Having a number is not the same as having full cover. Your record must be complete before the SNS pays for your care. See Registering with the SNS in Portugal.

The three numbers at once

If you live in Portugal and have no Portuguese Citizen Card, you may be able to get all three numbers in one request. It is free and available at 12 citizen service counters (Espaços Cidadão). You qualify if one of these applies:

  • you have applied for, or hold, a residence permit;
  • you are a citizen of an EU country;
  • you have applied for international protection, or you are a refugee or protection holder.

Your right to live here

If you are an EU, EEA, or Swiss citizen

You need no visa. If you stay longer than three months, you register at the town hall (Câmara Municipal) where you live, within 30 days after those three months. You receive an EU citizen registration certificate (Certificado de Registo de Cidadão da União Europeia, often called the CRUE).

  • Cost: €18 in person or €15 online for adults aged 25 and over.
  • Validity: five years.

The certificate is a registration of your right to live here under EU law. It is not a residence permit. See Registering as an EU Citizen Resident in Portugal (CRUE).

If you are from outside the EU

Most people apply for a residence visa at a Portuguese consulate before they move. The consulate books an appointment with AIMA, the immigration agency, for after you arrive. There you give fingerprints and pay the permit fees. AIMA now has 90 days to decide, which it can extend by 30.

  • First permit: valid for two years.
  • Renewals: valid for three years. Renew online between 90 and 30 days before your card expires.
  • Permanent residence: you can apply after five years of legal residence.

AIMA's fees for a first permit are €99.80 to assess it and €85.80 to grant it, per person, at the reduced rate AIMA currently charges. The full picture is in Visas and Residency in Portugal and Renewing Your Residence Permit with AIMA.

Other documents you will meet

Proof of address (comprovativo de morada). There is no single official document. Offices accept different things, such as a utility bill, a rental contract, or a bank statement in your name. Your parish council (junta de freguesia) can also issue a certificate of residence (atestado de residência). See Getting a Proof of Residence (Atestado de Residência).

Criminal record certificate (certificado de registo criminal). You need one for some jobs and other processes. See Getting a Criminal Record Certificate in Portugal.

Apostille (apostila). A foreign public document, such as a birth or marriage certificate, usually needs an apostille or consular legalisation before Portuguese offices will accept it. You get the apostille in the country that issued the document, before you move. Many documents also need a translation. See Getting an Apostille or Consular Legalisation and Getting a Certified Translation in Portugal.

Who does what

OfficeWhat it handles
Tax office (Finanças, the AT)NIF, income tax, property tax, invoices, address for tax purposes
Segurança SocialNISS, contributions, benefits, self-employment declarations
AIMAResidence permits for non-EU citizens, renewals, family reunification, permanent residence for EU citizens
Registry service (IRN)Births, marriages, deaths, nationality, Citizen Card, property and company registration
Town hall (Câmara Municipal)EU citizen registration, planning and local licences
Parish council (Junta de Freguesia)Certificate of residence, voter registration, local matters
Health centre (Centro de Saúde)Health user number, family doctor

A citizen shop (Loja do Cidadão) puts many of these services under one roof. See Using a Citizen Shop (Loja do Cidadão) in Portugal and Using a Loja do Cidadão in Portugal.

Going digital

Chave Móvel Digital (digital mobile key). This free login works for the Portal das Finanças, Segurança Social Direta, SNS 24, and other public services. If you are a foreign citizen, you can activate it at a public service counter with your passport or residence card. With most documents other than a passport, you also need your NIF. You need your own mobile phone number.

Portal das Finanças. The tax office's website. You file your tax return, see your invoices, and change your tax address there. See Filing Your IRS Tax Return in Portugal.

Segurança Social Direta. Your social security account. You see your contributions and apply for benefits there.

gov.pt. The government's portal. It lists public services and explains how to request each one.

Tips that save time

  • Keep originals and copies. Offices often ask for the original document. Keep a scan of everything too.
  • Book ahead. Many offices work by appointment. Check the office's booking page before you go.
  • Keep your address up to date. When you move, update it with each office. See Changing Your Registered Address in Portugal.
  • Learn a few phrases. "Venho tratar de..." (I have come about...), "Preciso de..." (I need...), and "Tem marcação?" (Do you have an appointment?).

This guide is general information, not legal or tax advice. Rules change often; check the official source before you act.

Sources

This guide is written from official sources and, where relevant, organisations' own websites.

Last verified October 2026. Rules and fees change; check the official source before acting.

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