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To many people it’s obvious that anyone born in Portugal is Portuguese. The truth is Portuguese nationality law works the other way around.
Portugal does not have a “pure” birthright citizenship system like the United States or Canada. Just being born in Portugal is not always sufficient to obtain the nationality. Rather, citizenship is usually established on the basis of a number of factors, such as the nationality of the parents, their legal residency in Portugal and whether the child was born on or off Portuguese territory.
This differentiation is applicable to many families living in Portugal today, particularly expats, Portugal Golden Visa investors, remote workers, entrepreneurs and foreign residents planning to move long-term.
It also applies to Portuguese citizens living abroad that have children born outside Portugal.
Given that the rights to nationality in Portugal are very procedural and document-driven, it is relevant to understand how Portuguese citizenship by birth works. A child may be entitled to citizenship by birth but registration and proper documentation are still required.
Our comprehensive guide to the Portuguese nationality system for 2026 covers this in greater detail.
Portugal Citizenship by Birth: Is It Real?
Portuguese nationality law combines elements of citizenship by descent and limited citizenship by birth. If at least one parent is Portuguese at the time of birth, the child is generally considered Portuguese from birth regardless of where the birth takes place.
Things get a little more nuanced when neither parent is Portuguese.
Children of foreign parents born in Portugal may acquire Portuguese nationality at birth if one of the parents is legally resident in Portugal for the minimum period required by the law on nationality. Under the current rules, that minimum legal residency period is generally one year, although proposed amendments approved in 2026 may eventually increase the required timeframe.
Portugal also grants citizenship to children born in the country who would otherwise be stateless.
As the law of nationality continues to develop, families should always check the precise legal requirements that will be in place at the time of application.
Who Qualifies for Portuguese Citizenship by Birth?
The law distinguishes several different scenarios.
| Situation | Citizenship at Birth? | Main Requirement |
|---|---|---|
| Child born to Portuguese parent | Yes | At least one parent is Portuguese |
| Child born abroad to Portuguese parent | Yes | Birth must be registered |
| Child born in Portugal to foreign parents | Yes, under conditions | Parent legally resident in Portugal |
| Child born in Portugal and stateless | Yes | No nationality available |
| Child born in Portugal to non-resident parents | Usually no | Residency requirement not met |
Portuguese Citizenship by Birth vs Citizenship by Descent
These concepts are frequently confused, even though Portuguese law treats them differently.
Citizenship by birth applies when nationality exists automatically from the moment the child is born because all legal conditions were already satisfied at that time.
Citizenship by descent usually applies to children born abroad to Portuguese parents. Those children are also Portuguese by law at birth, but they need to register with the Portuguese authorities for their nationality to be formally recognized.
The distinction becomes even more important for grandchildren of Portuguese citizens.
Unlike children, grandchildren are not automatically Portuguese at birth. Instead, they generally need to apply separately through Portugal’s ancestry provisions and demonstrate an effective connection to the Portuguese community.
Our Portuguese Citizenship by Descent Guide explains those ancestry pathways in more detail.
Children Born in Portugal to Foreign Parents
This is one of the most common situations among international families living in Portugal today.
Foreign residents holding legal residency permits may have children in Portugal who qualify for Portuguese nationality at birth if the residency requirements are satisfied.
Temporary residency permits such as the D7 Passive Income Visa, the D8 Digital Nomad Visa, the D2 Entrepreneur Visa, and even the Portugal Golden Visa may count toward lawful residence depending on the specific circumstances of the case.
For many expat families, this becomes one of the most important long-term advantages of relocating to Portugal.
Our Portugal Immigration Guide: Visas and Residency Options explains the main residency categories currently available for foreigners moving to Portugal.
How Birth Registration Works in Portugal
Even when citizenship exists automatically, the birth still needs to be formally registered.
In Portugal, births are commonly registered directly at the maternity hospital through the Nascer Cidadão system, at a civil registry office, or through a Portuguese consulate when the child is born abroad.
If the parents are married, registration is usually simpler and may be completed by one parent. In other cases, both parents might be required to appear depending on the circumstances.
Foreign documents must be legalized (Apostille or consular legalization) before being accepted in Portugal. If the documents are not in Portuguese, you may also need to have certified translations.
After the birth registration has been completed, the child can get a Portuguese Citizen Card which automatically creates:
- a Portuguese citizen card number,
- tax number (NIF)
- national health care number,
- and registration with social security.
These registrations are very important later in life for access to health-care, education, banking and administrative procedures.
Documents to Register a Child’s Birth in Portugal
The specific documentation depends on the situation, but authorities often request:
| Required Document | Purpose |
|---|---|
| Official birth certificate | Proof of birth |
| Parents’ identification documents | Identity verification |
| Parents’ residency documents | Proof of lawful residence |
| Marriage certificate (if applicable) | Civil status confirmation |
| Apostilled foreign documents | International legal validity |
| Certified Portuguese translations | Required for foreign-language documents |
Documents issued outside Portugal normally require apostille legalization or consular legalization, depending on the country of issuance.
Documents not issued in Portuguese may also require certified translation.
Get In Touch With Us
Portugal Residency Advisors® has helped hundreds of international families and investors secure residency, citizenship, and investments in Portugal. Get in touch with a specialist today and discover how we can help you start your journey to Portugal.
Does Portugal Allow Dual Citizenship?
Portugal fully allows dual nationality in most situations, which is one of the reasons Portuguese citizenship remains so attractive internationally.
Children who acquire Portuguese citizenship generally do not need to renounce their original nationality, assuming the other country involved also permits dual citizenship.
For international families, this flexibility often becomes a major advantage because it allows children to maintain legal ties to multiple countries simultaneously.
Our Portugal Dual Citizenship Guide explains how dual nationality works under Portuguese law.
Nationality Law Changes in 2026
Portugal’s nationality framework is currently undergoing important legal changes.
In 2026, amendments to the Portuguese Nationality Law were approved increasing the standard residency requirement for naturalization from five years to ten years for most applicants, while specific rules for CPLP and EU nationals may differ in some cases.
But rules of citizenship by birth continue to be governed by separate legal provisions.
As the legal landscape continues to evolve, families should stay tuned for future regulatory developments and transitional provisions.
For more information about the recent legal reforms, see our article Changes to the New Portuguese Nationality Law 2026.
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Your Questions Answered
Does Portugal automatically grant citizenship to babies born in Portugal ?
Not all the time. In general, a child born in Portugal is only eligible if at least one parent was legally resident in Portugal for the minimum period required before the birth.
Can children born abroad to Portuguese parents become Portuguese citizens?
Yeah. Children born abroad to at least one Portuguese parent are usually considered Portuguese from birth, when duly registered.
Does Portugal allow dual citizenship?
Yes. Dual nationality is generally allowed in Portugal, so most of the time applicants are not required to renounce their original citizenship.
Can Portuguese Golden Visa Holders' children get Portuguese Citizenship?
Yes, potentially. Children born in Portugal during a parent’s lawful residence period may be eligible if requirements of the nationality law are met.
Do grandchildren of Portuguese citizens automatically become Portuguese?
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