When Does a Child Born in Portugal to Foreign Parents Become a Citizen?

What is Portuguese citizenship by birth?

Portuguese nationality law runs mostly on blood, and soil is the conditional part. The main principle is jus sanguinis, the right of blood: a Portuguese parent passes nationality to the child wherever the child is born. On top of that sits a conditional jus soli, the right of soil, which is where children born in Portugal to foreign parents come in. Being born on Portuguese ground opens nationality only when extra conditions are met.

One distinction decides how the timing works: nationality of origin versus nationality by acquisition.

Nationality of origin (originária) treats the child as Portuguese from the day they were born, retroactively. The five-year-residence route, the double-soil route, and the statelessness route are all origin, and all "immediate" in the sense that they attach at birth.

Nationality by acquisition takes effect from the date the process is approved, not from birth. Naturalization is acquisition, and it is the "later" path.

The nationality law (Lei da Nacionalidade, Law no. 37/81, as amended by Lei Orgânica n.º 1/2026) is the source for all of this, and the version in force at the child's birth is the one that applies.

Do the parents need to be legally resident, and for how long?

Yes, and the number is five years of legal residence. For every soil-based route to nationality, a parent's legal residence is what the law measures, and since the 2026 law the threshold is five years.

What counts as legal residence. Legal residence means holding a valid residence permit (autorização de residência). Any type of permit counts: a D7 (passive income), a D8 (remote work), a work (D1 or D3) or study permit (D4 or D5), family reunification (D6), entrepreneur (D2), or a Golden Visa. The type does not change the rule; the length of legal residence does.

What does not yet count. A residence visa on its own, in the gap before the residence permit is issued, does not build the five years. The clock that matters runs on the permit, not on the visa or on the date you first landed. This detail decides the common case below.

When the five years is measured. For the immediate origin route, the five years is counted at the moment of the birth. For the later naturalization route, it is counted at the moment of the request. That timing produces outcomes that feel unfair between siblings: a child born after a parent hits five years can be Portuguese by origin, while an older sibling born at year three could not.

If a parent has five years at the birth: the child is Portuguese immediately

This is the fastest outcome, and it is nationality of origin. When a parent had at least five years of legal residence at the time of the birth, the child born in Portugal is Portuguese from birth. Two conditions come with it.

The residence. One parent, mother or father, holds at least five years of legal residence, counted at the birth. The parent's own nationality does not matter here, only the time they have legally lived in Portugal. The parents also must not be in Portugal in the service of their home State, which excludes serving foreign diplomatic staff, not ordinary residents.

The declaration. The parents have to opt in, and the natural moment is when they register the birth. At that declaration, either parent, acting as the child's legal representative, shows their ID and proof of a valid residence title. Without the declaration and that proof, the child does not get nationality this way, even with the five years in place. "From birth" here is the legal effect, since origin is retroactive to the day the child was born. It is not a promise of same-day paperwork, the registry still takes time to conclude the case.

Two more situations are also immediate origin, for narrower cases:

A parent was also born in Portugal (double soil). If at least one parent was themselves born in Portugal and was living here, with any status, at the birth, the child is Portuguese by origin automatically, with no five-year wait and no separate declaration. This reaches families who have been in Portugal across two generations without ever taking Portuguese nationality.

The child would otherwise be stateless. A child born in Portugal who cannot inherit any nationality from the parents is Portuguese by origin, so they are not left without a nationality.

If a parent does not have five years yet: when the child becomes a citizen

The child is not stuck. Nationality comes later, and it is worth knowing exactly when. This is the case most foreign families are actually in, especially anyone who are having a baby in their first years in Portugal. There are two routes, and they can run in parallel.

Route 1: naturalization of the child, through schooling

The clearest path opens once a parent has five years of legal residence and the child is in school. Under the nationality law, the Government grants nationality to a minor born in Portugal to foreign parents when, at the time of the request, all of these are true:

• A parent has been legally resident for at least five years, counted at the request.
• The child is enrolled in and regularly attending compulsory schooling, where that applies to their age.
• If the child has reached the age of criminal responsibility (16), they meet the law's good-conduct requirements.

Two things matter in how people misread this.

It is "enrolled and attending," not "finished." The child does not have to complete a cycle or graduate. They have to be registered in and going to school.

Compulsory schooling in Portugal runs from age 6 to 18. The schooling condition is written as applying "where applicable," so it bites once the child reaches school age. In practice, this route becomes the reliable one from around the time the child starts school at six, provided a parent has the five years by then. There is no language test for the child on this route.

This is acquisition, so nationality runs from approval, not from birth. Keep the child's school enrolment records, they are the proof this route depends on.

Route 2: through a parent who becomes Portuguese

If a parent themselves becomes Portuguese, the child can follow. A minor child of a parent who acquires Portuguese nationality (by naturalization or otherwise) can also acquire it by declaration, as long as the child was already born when the parent acquired it.

This is the answer to a question many parents ask directly: does the child become Portuguese when we do? Through this route, yes. It often moves faster than waiting on the child's own schooling route, because the child rides on the parent's acquisition. It is a separate path from Route 1, and a family can pursue whichever arrives first.

Route 3: the child as an adult

If nothing above happened during childhood, the door does not close. Once grown, the child can naturalize in their own right through their own years of legal residence in Portugal, on the general rules (seven years for nationals of Portuguese-speaking countries and EU citizens, ten years for others).

A practical case: a D8 parent whose baby is born before the permit

Take a parent who arrives on a D8 visa, and the baby is born in Aveiro before the residence permit is issued. Is the child Portuguese? No. Legal residence is built while holding a residence permit, and at the birth the parent does not have the permit yet, let alone five years of it. Here is how it actually plays out.

At birth. The child is registered as a foreign national, holding the parent's nationality. There is no origin route, because the parent's qualifying residence is effectively at zero.

Right away. The parents apply for the child's own residence permit, within six months of the birth registration, so the child is documented (details in the next section).

Later, for nationality. The child can be naturalized once the parent has held five years of legal residence (counted from when the permit was issued) and the child is enrolled in and attending compulsory schooling. For a parent starting near zero, those two lines tend to meet around the time the child starts school.

Or sooner, through the parent. If the parent reaches Portuguese nationality first, the child, born before that, can acquire it by declaration.

So the honest answer to "when" is this: not at birth, and not simply on turning five or finishing a school year, but when a parent reaches five years of legal residence with the child in school, or when a parent becomes Portuguese.

The child's right to live in Portugal in the meantime

A child born in Portugal to a resident parent has their own facilitated residence permit, even before any nationality question is settled. This is one of the most reassuring parts, and it is genuinely easier than the routes adults go through.

Under the immigration law (Lei n.º 23/2007), a minor born in Portugal to a parent who holds a residence permit is granted a residence permit with the residence visa waived. What that means in practice:

• No prior visa, no trip home. The permit is requested directly at AIMA, in a single step, without going back to the country of origin.
• A six-month window. The application should be made within six months of the child's birth registration, by either parent.
• A card in about 90 days. After the AIMA appointment, the residence card is issued within roughly 90 days.
• Valid two years, then renewable. The permit runs for two years from issue and renews for three-year periods.

So the child is not in limbo while the family waits for the residence clock or the schooling route. They hold legal residence in their own name, which also keeps their own five-year clock running for later.

What changed in Portuguese nationality law in 2026?

The 2026 law made the soil route slower, and most of the guidance online has not caught up. If you are reading older articles, assume the numbers are wrong until you check them against the current law.

The changes that matter for a child born in Portugal to foreign parents:

The 2026 law entered into force on May 2026. The version in force at the child's birth is the one that applies, so a child born under the old one-year rule, to a parent who met it then, keeps their nationality.

Where the outdated information will trip you up. Articles still describe a "New Jus Soli" from 2020 with a one-year requirement, or say a child born in Portugal to a resident parent is "automatically" a citizen, or quote a €250 fee for a by-birth case. Those reflect the old rules. The current position is five years of legal residence, a positive declaration, and residence proof at the declaration.

How to register the birth and claim nationality

Registering the birth and claiming nationality are two acts, and both start at the civil registry. Registering a birth in Portugal is mandatory, free, and must be done within 20 days. Claiming nationality of origin through the five-year route is the added declaration on top of that registration.

Where you do it

Two channels, depending on what you choose.

Online, on the Justice Portal. Portugal runs an online birth-registration and nationality service that uses the Chave Móvel Digital (the national digital key), through a phone or a Citizen Card with a card reader. A foreign parent has to activate a Chave Móvel Digital too, using their passport. It is the fastest channel when it is open, though the service goes offline for stretches, so check it is running before you rely on it.

In person at a civil registry office (Conservatória). Either parent can register the birth, married or not. For a birth in Portugal, this is usually the maternity unit's registration service or a Conservatória near the mother's habitual residence.

If you do not have five years yet

Register the birth, apply for the child's permit, and plan for the naturalization route. Record the child as a foreign national now, file for the child's residence permit within six months, and hold on to residence records and, later, school enrolment. When a parent reaches five years of legal residence and the child is in compulsory schooling, you apply for naturalization. Missing paperwork from the early years is a common reason this route drags later.

What a Portuguese child means for the foreign parents

A Portuguese child does not make the parents Portuguese, but it opens doors only parents of a Portuguese citizen have. This is one of the biggest questions foreign families ask, and there are two separate benefits.

Naturalization for the parents. A foreign parent of a child who is Portuguese by origin can apply for naturalizationafter around five years of residence in Portugal, held under any title, as long as the parent-child link was established at the child's birth. It is a specific route for ascendants of Portuguese citizens.

A residence permit through the child. Separately, and available earlier, the immigration law grants a foreign parent a residence permit when they have a minor child who is resident in Portugal or holds Portuguese nationality, over whom they exercise parental responsibility and whose support and education they ensure. This can be requested at AIMA even where the parent's own situation is irregular, and it is decided case by case.

The exact conditions and timelines sit in our guide to Portuguese citizenship by naturalization, so confirm the current detail there before you count on it.

What gets a nationality application rejected or stuck?

Most delays come from the file, not from eligibility. The right is usually clear, and the months are lost in paperwork. The problems that come up again and again:

The parent is short of five years at the birth. For the immediate origin route, the residence is measured at the birth. A parent at four years and ten months does not qualify for origin, though the child may still reach nationality later through naturalization.

No declaration, or no residence proof at the declaration. The five-year origin route needs the parents to declare it and to show a valid residence title at that moment. Skip either and there is no attribution.

The parents' marriage is not registered in Portugal. If the parents are married, that marriage has to be transcribed onto the Portuguese record before the nationality request moves.

Foreign documents with no apostille or translation. A birth certificate or any foreign record without a Hague Apostilleand a certified Portuguese translation is enough to send the file back.

Names or dates that do not match. An incomplete name, a mismatch between the local record and the Portuguese one, a dropped accent: small inconsistencies trigger correction requests that add months. Align the records before you submit.

How long does it take, and how much does it cost?

Registering the birth is free and fast; the nationality side runs long. Birth registration itself carries no fee. For nationality of origin, the government fee is modest, around €175, though you should confirm the current amount with the IRN or your consulate before you pay, since the fee schedule changes.

On timing, plan for well over a year on the nationality side. As of 2026, the Central Registry Office reports taking more than a year to conclude attribution cases, and any consular appointment wait comes on top of that. The child's residence permit is quicker, with the card issued within roughly 90 days of the AIMA appointment.

Born in Portugal versus citizenship by descent

These are opposite starting points, and people mix them up constantly. Citizenship by descent runs through Portuguese ancestry: a parent or grandparent who is Portuguese, wherever the child happens to be born. This guide covers the reverse: a child born in Portugal whose parents are foreign, where the soil, not the bloodline, is the starting point.

If a parent or grandparent is actually Portuguese, the child likely qualifies through descent instead, which is usually a cleaner route. For that, see our guide to Portuguese citizenship by descent. For the general picture of every by-birth situation, see Portuguese citizenship by birth.

Common questions

Is a child born in Portugal automatically a citizen?

No. Portugal has conditional jus soli. A child born in Portugal to foreign parents is Portuguese from birth only if a parent had five years of legal residence at the birth (plus a declaration), or a parent was also born in Portugal, or the child would otherwise be stateless. Otherwise, nationality comes later.

When exactly does the child become Portuguese if we do not have five years yet?

When a parent reaches five years of legal residence and the child is enrolled in and attending compulsory schooling, which in practice is around when the child starts school at six. Or earlier, if a parent becomes Portuguese first, in which case the child can acquire nationality through the parent by declaration.

Does the child become a citizen just by finishing grade school?

No. The naturalization route asks for the child to be enrolled in and regularly attending compulsory schooling, together with a parent's five years of legal residence. Finishing a school year on its own is not the trigger; the parent's residence has to be there too.

Does our type of visa matter?

No, any valid residence permit counts. A D7, a D8, a work or study permit, family reunification, or a Golden Visa all count as legal residence once the permit is issued. What matters is the length, five years, not which permit it is. A visa on its own, before the permit, does not build those years.

Can the child live in Portugal legally before getting nationality?

Yes. A child born in Portugal to a parent who holds a residence permit gets their own residence permit, with the visa waived, applied for at AIMA within six months of the birth registration.

Does having a Portuguese child help the parents?

Yes. A parent of a child who is Portuguese by origin can apply for naturalization after around five years of residence, and, separately and earlier, can apply for a residence permit on the basis of a minor child who is resident or Portuguese.

Does the child lose their other nationality?

No. Portugal allows dual citizenship, so the child keeps the nationality inherited from the parents alongside the Portuguese one.

Where this leaves foreign families in Portugal

The whole thing turns on one date: when a parent hits five years of legal residence, measured against the child's birth.

Five years at the birth means nationality now. A parent with five years of legal residence at the birth passes nationality of origin, by declaring it and showing the residence title. Being born in Portugal, on its own, does not.

Less than five years means nationality later, on a known timeline. Through the child's own naturalization once a parent has five years and the child is in school, or through a parent who becomes Portuguese first, or through the child's own residence as an adult.

And the child is documented throughout. A facilitated residence permit covers the child from the first months, and keeps their own clock running.