Portuguese citizenship by descent is available to the children and grandchildren of Portuguese nationals under Law No. 37/81. Children qualify automatically through a parent; grandchildren qualify through a grandparent but must also show a connection to Portugal, usually by demonstrating knowledge of the language. The declaration fee is €250, and most cases take somewhere between 18 and 29 months from submission to decision.
Who Qualifies Through a Parent
If either of your parents is Portuguese, you are Portuguese by origin under Article 1(1)(c) of the nationality law. Your birthplace is irrelevant. You confirm the status either by registering your birth in the Portuguese civil registry or by filing a formal declaration.1Official Gazette of Portugal. Law No. 37/81 – Nationality Law No language test, no cultural test.
One catch: the parent’s own Portuguese nationality has to be established on paper. If your Portuguese parent was born abroad and never registered that birth with the Portuguese registry, you handle their registration first, then your own. Adopted children recognized under Portuguese law qualify the same way as biological children.
Who Qualifies Through a Grandparent
Grandchildren apply under Article 1(1)(d). The lineage claim is the same idea, but the law adds three requirements: you must formally declare that you want to be Portuguese, register your birth in the Portuguese civil registry, and show an effective connection to the Portuguese national community.2Legislationline. Law on Nationality Your Portuguese grandparent must not have lost their nationality at any point.
In practice, consulates treat knowledge of Portuguese as satisfying the connection requirement.3Consulate General of Portugal in Newark. Nationality for Grandchildren of Portuguese Grandparents Basic A2-level proficiency is generally enough, though assessment methods differ between posts. The statute also lists regular contact with Portuguese territory as a factor, but language ability on its own is treated as sufficient.
A useful point that surprises many applicants: your parent does not need to have claimed Portuguese citizenship for you to apply as a grandchild. You can go directly to your grandparent’s records. Second-generation emigrants often never formalized their own status, and the grandchild’s claim is not held back by that gap.
If Your Ancestor Is a Great-Grandparent
The law stops at grandchildren. If your only Portuguese ancestor is a great-grandparent, you cannot apply directly. The workaround is sequential: your parent (the grandchild of the Portuguese ancestor) obtains citizenship first under Article 1(1)(d), and then you qualify as the child of a Portuguese citizen under Article 1(1)(c). It doubles the paperwork and roughly doubles the wait.
Extending eligibility to great-grandchildren has been publicly discussed, but no such law has been enacted as of mid-2026.
Documents to Gather
Document collection is where most applicants spend the bulk of their time, and where most delays start. Every generation in the chain from your Portuguese ancestor down to you has to be documented, and every foreign document must be apostilled and translated into Portuguese.4Consulate General of Portugal in New Bedford. Citizenship
- Your Portuguese ancestor’s birth record (assento de nascimento). Request it from the Instituto dos Registos e do Notariado (IRN). If the record predates 1911, Portugal had no civil registry yet, so you may need a parish baptism record from the relevant district archive instead.
- Your own birth certificate, original with an apostille. If you were born in a country outside the Hague Convention, use consular legalization instead.
- Birth and marriage certificates for every generation between you and the Portuguese ancestor. If your Portuguese grandparent married abroad, that marriage must be transcribed into the Portuguese civil registry before your file can move forward.
- Criminal record certificates from every country where you have lived since age 16, each apostilled and translated.4Consulate General of Portugal in New Bedford. Citizenship
- A photocopy of your current valid passport. It does not need to be apostilled, despite what some guides say.
Names and dates have to match exactly across the chain. If your grandmother’s birth certificate spells her name one way and her marriage certificate another, resolve it before you file. Mismatches in names, dates, and places are the single most common cause of administrative delay.
Forms, Filing, and the Fee
Children of Portuguese citizens use Modelo 1C.5Instituto dos Registos e do Notariado. Declaração para Atribuição da Nacionalidade Portuguesa – Modelo 1C Grandchildren use Modelo 1D.3Consulate General of Portugal in Newark. Nationality for Grandchildren of Portuguese Grandparents Both have separate versions for applicants over and under 18. Download the current version from the IRN or from your nearest consulate.
On the form, you enter the ancestor’s birth registration number, the year of registration, and the name of the registry office. The registrar uses those fields to pull the record electronically, so the data has to match the assento de nascimento exactly. Grandchildren also complete sections on Portuguese language ability and criminal record.
Your signature has to be witnessed in person, either at a Portuguese consulate, at a Portuguese notary, or before a notary public whose certification is then apostilled.5Instituto dos Registos e do Notariado. Declaração para Atribuição da Nacionalidade Portuguesa – Modelo 1C For minors, both parents must be present, or one parent must provide a power of attorney.6Embassy of Portugal to the United States of America. Nationality (Children of Portuguese Citizens)
The fee is €250.7Government of Portugal. Obtaining Portuguese Nationality Debit card works if you submit in person; cheque or postal order works by mail. Send the completed package to the Conservatória dos Registos Centrais, Rua Rodrigo da Fonseca, 202, 1099-033 Lisbon, or submit in person by appointment at a Portuguese consulate.8GOV.PT. Pedir a nacionalidade portuguesa Keep your proof of payment; the reference number is used to track the file.
Timeline and How to Check Your Status
Once the registry opens your file, you receive a tracking code (código de consulta) by email. That code lets you check status through the Ministry of Justice portal.9Justiça.gov.pt. Consultar estado do processo de nacionalidade If you lose it, request it again at a Nationality Office or by calling the Registries Line at (+351) 211 950 500. If a lawyer represents you, the code may have gone to them directly.
The file moves through document verification, criminal background checks, and a final decision. If something is missing or unclear, the registrar issues a notification with a deadline to respond. Miss the deadline and the file can be shelved.
There is no official published timeline. Immigration practitioners and applicant reports consistently point to a range of roughly 18 to 29 months for descent cases. Files that require transcriptions of foreign marriages, older records, or incomplete ancestor documentation tend to land at the longer end, and some applicants have reported waits over three years during backlog periods.
What Approval Gets You
Approval produces a Portuguese birth certificate in your name. That certificate is your proof of nationality, but it is not the finish line. You still need a Cartão de Cidadão (Citizen Card), which is your primary Portuguese ID, and the Citizen Card is a prerequisite for a Portuguese passport. Both are issued at IRN offices in Portugal or at a consulate abroad.
A Portuguese passport is an EU passport. You gain the right to live, work, and study in any EU member state without a visa or work permit.10European Commission. Free Movement and Residence You can stay in another EU country for up to three months on just the passport or Citizen Card; longer stays require registering as a worker, self-employed person, or student. After five years of continuous legal residence in another EU country, you gain permanent residence rights there. Non-EU spouses and dependent children can move with you.
Dual Citizenship
Portugal recognizes dual citizenship. You do not renounce your current nationality to acquire Portuguese, and Portugal will not revoke Portuguese citizenship for holding another. The United States does not prohibit dual citizenship either. Americans who naturalize as Portuguese hold both passports without legal conflict on either side.
Why Applications Get Denied
Most denials are documentary, not legal. Missing records, name mismatches across the chain, and foreign life events that were never transcribed into the Portuguese registry are the usual causes. If your Portuguese grandparent married abroad and that marriage was never transcribed, the registrar cannot establish descent. These are fixable, but each fix resets the clock.
Criminal convictions can block the application. Applicants sentenced to three or more years in prison for conduct that is a crime under Portuguese law are ineligible.3Consulate General of Portugal in Newark. Nationality for Grandchildren of Portuguese Grandparents The 2024 amendments added separate grounds for involvement in terrorism, violent crime, or organized crime, applicable even to grandchildren claiming by origin. Applications are also suspended for anyone subject to UN or EU restrictive measures.
For grandchildren, failing the effective-connection requirement is another ground for refusal. The threshold is not high, but applicants with no Portuguese language ability and no other ties struggle to satisfy it.
Finally, applications fail if the ancestor lost Portuguese nationality before passing it on. This is uncommon but real. Any loss of nationality appears as an annotation on the ancestor’s birth record, so requesting the full record early tells you where you stand.