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What is Naturalization by Residency?

Naturalization (naturalização) is the legal process of becoming a Portuguese citizen based on your period of legal residence in Portugal. Unlike citizenship by descent or marriage, this path is available to anyone who has lived legally in Portugal long enough and meets the requirements.

Once you become a citizen, you hold full Portuguese (and EU) citizenship. You can vote, work anywhere in the EU, and pass citizenship to your children. You also receive a Portuguese passport, one of the strongest travel documents in the world.

Eligibility Requirements

To qualify for citizenship by residency, you generally need to meet all of the following conditions:

2026 Law Change

Portugal's Nationality Law was amended by Lei Orgânica n.º 1/2026 (corrected by Declaração de Retificação n.º 17/2026), effective 19 May 2026. Residence periods, knowledge requirements, and eligibility criteria have all changed. Applications already pending on 19 May 2026 are subject to the previous rules. New applicants should check the current Nationality Law and official IRN/ePortugal guidance for their individual situation.

Some official guidance pages may still reference the previous rules and are being updated. Where website guidance conflicts with the current consolidated legislation, the legislation applies.

Current Eligibility Criteria (since 19 May 2026)

  • Age: Must be of age (18 or older) or emancipated
  • Legal residence — CPLP and EU nationals: At least 7 years of legal residence in Portugal
  • Legal residence — other nationals: At least 10 years of legal residence in Portugal
  • Knowledge requirements: Sufficient knowledge of the Portuguese language, Portuguese culture, Portuguese history, national symbols, and fundamental rights and duties connected with Portuguese nationality and the political organisation of the Portuguese State — see Language & Integration Requirements
  • Solemn declaration: A solemn declaration of adherence to the fundamental values and principles of a democratic state based on the rule of law
  • Criminal record: No conviction for a crime punishable by 3 or more years of imprisonment under Portuguese law
  • National security: Must not constitute a danger to national security or defence
  • Restrictive measures: Must not be subject to restrictive measures of the United Nations or the European Union
  • Subsistence: Must demonstrate the capacity to ensure their own subsistence

Legal Residence Period

Under the current Nationality Law (as amended by Lei Orgânica n.º 1/2026), nationals of CPLP (Portuguese-speaking) countries and EU Member State citizens must have at least 7 years of legal residence. Nationals of other countries must have at least 10 years of legal residence. You must have held a valid residence permit (autorização de residência) or residence card for this period. Time spent on a tourist visa or while waiting for a permit decision may not count.

If you do not yet have legal residency, start with our Residence Permit Guide.

Criminal Record Requirement

You must not have been convicted of a crime punishable by a prison sentence of three years or more under Portuguese law. The government checks your criminal record in Portugal and may request records from your country of origin.

Connection to the Portuguese Community

Authorities assess whether you have genuine ties to Portugal. This can include:

  • Living and working in Portugal
  • Children enrolled in Portuguese schools
  • Social connections, community involvement, or volunteering
  • Property ownership or long-term rental
  • Registration with the local júnta de freguesia (parish council)

Language and Integration Requirements

Under the 2026 nationality law, applicants must demonstrate knowledge that goes beyond the Portuguese language. The law now requires sufficient knowledge of:

  • The Portuguese language
  • Portuguese culture and history
  • National symbols of the Portuguese Republic
  • Fundamental rights and duties connected with Portuguese nationality
  • The political organisation of the Portuguese State and its democratic principles

In practice, the language component has traditionally been assessed at A2 level (basic user) on the Common European Framework of Reference (CEFR). However, the 2026 law broadens the scope of what "sufficient knowledge" means, and how the culture, history, and civic components will be formally assessed may depend on implementing regulations that are still being finalised.

Implementation Still Developing

The government has 90 days from the law's entry into force (19 May 2026) to publish the regulations that define how these broader knowledge requirements will be assessed. Until those regulations are published, the exact format of any new assessments — whether integrated into a single exam, tested separately, or evaluated through documentary evidence — may not yet be confirmed. Check official IRN or ePortugal channels for updates.

Portuguese Language

The language component has traditionally been proven at A2 level (basic user) on the CEFR, meaning you can understand simple everyday phrases and communicate in routine tasks. How the 2026 law's "sufficient knowledge" standard will be assessed in practice may depend on implementing regulations.

  • CIPLE exam — The most common option. CIPLE (Certificado Inicial de Português Língua Estrangeira) is an A2-level exam offered by certified centres across Portugal. Check the CAPLE website for current exam dates, fees, and registration.
  • PLA certificate — An A2-or-higher certificate from AIMA's Português Língua de Acolhimento (PLA) programme can also serve as proof. See our Learn Portuguese Guide for details.
  • School certificate — If you completed at least 2 years of education in Portuguese, this may be accepted
  • Other recognised certificates — Some equivalent certifications may qualify

For a full breakdown of the broader integration requirements, exemptions, and how CPLP nationals may benefit from a presumption of sufficient knowledge, see our dedicated Language & Integration Requirements Guide.

Start Preparing Early

Do not wait until you are ready to apply. Learning Portuguese takes time, language exams have limited test dates, and you may also need to familiarise yourself with Portuguese culture, history, and civic concepts. Start classes as soon as you arrive. See our Learn Portuguese Guide for free and paid options.

Documents You Need

Gather these documents before starting your application. All foreign documents must be translated into Portuguese by a certified translator and may need an apostille or consular legalization.

Required Documents

  • Valid passport (original and certified copy)
  • Birth certificate from your country of origin (with apostille and certified Portuguese translation)
  • Proof of legal residence in Portugal for the required period (residence permit copies, or certificate from AIMA/SEF)
  • Certificate of knowledge of Portuguese language (historically CIPLE or equivalent at A2 level or higher — see Language & Integration Requirements for the current standard)
  • Evidence of knowledge of Portuguese culture, history, national symbols, and civic principles (format may depend on implementing regulations — check with IRN)
  • Criminal record certificate from Portugal (obtained from the Ministry of Justice)
  • Criminal record certificate from your country of origin (with apostille and translation)
  • NIF (tax number) document
  • Proof of capacity to ensure your own subsistence (employment contract, tax returns, bank statements, or similar)
  • Proof of connection to the community (tax returns, employment contracts, school enrolment, parish registration)

Document Validity Periods

Criminal record certificates and some other documents have a limited validity period (often 3 to 6 months). Time your document collection carefully so nothing expires before you submit your application.

The Application Process at IRN

Citizenship applications are handled by the IRN (Instituto dos Registos e do Notariado), not by AIMA (the immigration agency). The process works as follows:

  1. Collect all documents — Gather, translate, and apostille everything listed above. This can take several weeks or months.
  2. Submit your application — Applications can be submitted at the Conservatória dos Registos Centrais in Lisbon, at local civil registry offices (conservatórias), or through IRN Online where available. Check the IRN website for current submission options.
  3. Pay the application fee — Pay the applicable application fee. Check the current fee on the IRN or ePortugal website, as amounts are updated periodically.
  4. Wait for processing — The IRN reviews your application and contacts the relevant authorities (immigration, criminal police, tax authority). Processing times vary and can be lengthy. The IRN does not guarantee a fixed timeline.
  5. Receive the decision — You will be notified by post or through the online platform. If approved, you proceed to the oath ceremony.
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After Approval: Oath & Documents

Once your application is approved, you must complete the following steps to finalize your citizenship:

The Oath Ceremony

You are required to take an oath of loyalty to the Portuguese Republic. This ceremony takes place at a civil registry office (conservatória). During the ceremony, you formally declare your commitment to respect Portuguese laws and the Constitution.

The oath is a short, formal event. You may bring family members to witness it.

After the Oath

  1. Portuguese birth certificate — After the oath, a Portuguese birth certificate (assento de nascimento) is issued in your name
  2. Citizen Card (Cartão de Cidadão) — Apply for your Portuguese national ID card at the IRN
  3. Passport — Apply for a Portuguese passport at the IRN or at a passport office
  4. Update your records — Inform the tax authority, social security, and your bank of your new citizenship status

Dual Citizenship

Portugal allows dual citizenship. You are not required to give up your original nationality when you become Portuguese. You can hold both passports and enjoy the rights of both countries.

Check Your Home Country's Rules

While Portugal permits dual citizenship, your country of origin may not. Some countries require you to renounce your original citizenship if you acquire another nationality. Check with your home country's embassy or consulate before applying.

Common Mistakes to Avoid

  • Letting documents expire — Criminal record certificates have short validity. Time your collection carefully.
  • Missing the language exam — CIPLE exams are offered on specific dates and fill up. Register months in advance.
  • Applying at the wrong office — Citizenship is handled by IRN, not AIMA. Do not go to an AIMA office for this.
  • No proof of community ties — Keep records of your tax filings, employment contracts, utility bills, and parish registration.
  • Incomplete translations — Every foreign document needs a certified Portuguese translation. Uncertified translations are rejected.
  • Gaps in legal residence — Extended absences from Portugal may reset or interrupt your qualifying residence period.

Common Questions

How long does the entire process take?

From document collection to receiving your citizen card, the process can take a significant amount of time. Document gathering may take 1 to 3 months. Processing times vary significantly depending on caseload and the complexity of individual applications. The IRN does not publish a guaranteed timeline.

Can my family also get citizenship?

Each adult must apply separately and meet the requirements individually. Minor children of a new Portuguese citizen may be eligible for citizenship through their parent. Spouses have a separate pathway (citizenship by marriage) with different requirements.

What if my application is rejected?

You will receive a written explanation. Common reasons include insufficient residence period, language certificate issues, or criminal record concerns. You may appeal the decision or reapply once you address the issues.

Do I need a lawyer?

A lawyer is not required, but can be helpful if your situation is complex (for example, gaps in residence, criminal record questions, or document legalization issues). Many immigrants complete the process without legal assistance.

Official Sources

This guide provides general information only and does not constitute legal advice. Government procedures and laws can change. Always confirm current requirements with the responsible Portuguese authority before applying. Reviewed against official sources: 23 September 2026.