Citizenship by descent: children, grandchildren and great-grandchildren

Portuguese nationality passes down the family line, but not at the same price for each generation. A child of a Portuguese parent is Portuguese from birth once registered. A grandchild must declare, prove ties and meet most naturalisation conditions. A great-grandchild — a 2026 route — must first live five years here.

Updated 18 September 2026Facts checked against official sources (listed at the end)

Children of a Portuguese parent (art. 1.º n.º 1 c)

Born abroad to a Portuguese mother or father, you are Portuguese by origin if your birth is entered in the Portuguese civil register or if you declare that you want to be Portuguese. There is no age limit, no residence, no language test, no ties test. The effects run from birth (art. 11.º).

What it takes: the Portuguese parent’s birth record (or their own nationality record), your birth certificate apostilled and, if needed, translated, your identity, and — if the parent acquired Portuguese nationality later — proof that they were Portuguese when you were born or that the filiation was established during your minority (art. 14.º). Children born to a parent who was still foreign at the time of the birth are not covered by c); they may use the minor’s declaration if the parent naturalises while they are under 18 (art. 2.º).

Filing: any consulate, the Registos Centrais, or a registry office. This is a registration, not a request: no ministerial decision, no 250 € naturalisation fee — the civil-register acts have their own emoluments.

Children: origin nationality by registration or declaration, no conditions
Grandchildren: declaration + effective ties + art. 6.º c)–h) conditions (language, culture, record)
Great-grandchildren: 5 years of legal residence in Portugal, then naturalisation with the other conditions
Minors of a parent who acquires nationality: declaration (art. 2.º)

Grandchildren (art. 1.º n.º 1 d) and n.º 3)

A person with at least one Portuguese-born grandparent (second-degree ascendant in the direct line) who did not lose the nationality is Portuguese by origin if they declare it and have effective ties to the national community. Since 2026 the law adds that this attribution presupposes meeting the conditions of art. 6.º n.º 1 c) to h): proof of Portuguese language and culture, history and symbols; knowledge of rights, duties and the State’s organisation; the solemn declaration; the criminal, security and sanctions conditions.

Effective ties were already required; the Regulation lists what proves them — knowledge of Portuguese (the A2 certificate is the usual proof), residence or regular stays in Portugal, family and cultural links, involvement in Portuguese communities abroad. The reform removed the presumption of ties and made the language and culture proof explicit. Grandchildren files have been among the slowest at the IRN; a complete file with the language certificate from day one is the only accelerator.

Great-grandchildren (art. 6.º n.º 8) — new in 2026

Third-degree descendants of Portuguese-born citizens may be granted nationality by naturalisation with a waiver of the residence period of condition b), provided they have legal residence in Portugal for at least five years. The other naturalisation conditions apply (language and culture, rights and duties, declaration, record, security, subsistence), and the 250 € fee. In practice: a residence visa first (D7, D8, D2, D1, D4 — see the visa routes), five years of permits, then the file.

Routes that closed on 19 May 2026

The Ministry of Justice lists them: the special Sephardic regime, the acquisition by ascendancy of a Portuguese-born citizen in certain situations and the acquisition by descent from Portuguese-born citizens or membership of a community of Portuguese ancestry (the former art. 6.º n.º 7). Files pending on 19 May 2026 continue under the old law; new requests cannot invoke them.

Documents for a descent file

Portuguese ancestor’s birth record (Portuguese civil register; if born before 1911 or abroad, church or consular records, transcribed);
the chain of certificates linking you to the ancestor: birth and marriage certificates of each generation, apostilled and translated where not in English, French or Spanish;
proof that the ancestor did not lose Portuguese nationality (for grandparents who naturalised elsewhere before 1981, the loss rules of the old Act apply — this is where files fail);
your identity, criminal record certificates (grandchildren and great-grandchildren), the A2 certificate and proof of ties;
for minors, the parents’ identity and, where relevant, a court decision on parental responsibility.

Name spelling drifts across generations and countries — "João" becomes "John", "Gonçalves" becomes "Goncalves". The IRN needs each certificate to match the previous one or a document explaining the change. We reconcile the chain before filing; it is the single most useful thing an adviser does on a descent file.

Questions

My mother is Portuguese but I was born abroad and I am 45. Too late?

No. Origin nationality through a parent has no age limit. Register your birth at the consulate with your mother's Portuguese record.

My grandfather naturalised in the United States in 1960. Is the line broken?

Under the Act then in force, acquiring another nationality by will could mean losing the Portuguese one. Whether he lost it depends on the date, the wording of the law at the time and any declaration made; we check the record before promising anything.

Do my children become Portuguese with me?

Minor children of a person who acquires nationality can acquire it by declaration (art. 2.º); children of a parent who is Portuguese by origin at their birth are Portuguese by registration (art. 1.º c).

Is Portuguese required for a child's registration?

No. Language, culture and ties tests apply to grandchildren and great-grandchildren, not to children of a Portuguese parent.

Sources and official references

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