A Portuguese passport is a European Union passport.

Consequently, it carries the right to live, work, study, retire and own property in any EU Member State, along with access to healthcare and education systems across the bloc and one of the strongest travel documents in circulation. It also descends: once a person is recognised as Portuguese, that person’s children hold a claim of their own.

Portugal allows for dual citizenship. No renunciation is required, and as a matter of Portuguese law the acquisition of Portuguese nationality does not extinguish a citizenship already held.

Whether the applicant’s own State takes the same view is a separate question, and one this firm examines at the outset of any instruction.

Two ways of becoming Portuguese

Portuguese law distinguishes nationality held from birth from nationality acquired subsequently. The distinction is not academic and it governs each of the routes below.

Nationality held from birth is treated as having always existed. That is why a person recognised at fifty can pass a claim to a child born twenty years earlier, and why the order in which family members apply can change the outcome. Nationality acquired later takes effect only on registration, and for the first two years the Public Prosecutor can object to it on limited grounds.

Descent claims through a parent or grandparent sit in the first category. Marriage, adoption and naturalisation sit in the second.

The criteria

Portugal follows jus sanguinis, the principle that nationality passes through the bloodline rather than by place of birth. Where a Portuguese ancestor stands close enough in the line, a claim arises irrespective of the applicant’s place of birth or country of residence.

Two features make the Portuguese system more generous than most. There is no generational cut-off date and no requirement that the ancestor was registered within a particular window. And the parent and grandparent routes are treated as nationality held from birth rather than granted later, which is why the applicant’s own children acquire a claim even where they were born long before that status was formally recognised.

What the law does require is proof. Parentage must be legally established in every generation between the Portuguese ancestor and the applicant, and the documentary chain must withstand scrutiny at the Conservatória dos Registos Centrais.

Child of a Portuguese national

The most direct route in the system. Where either parent was Portuguese at the date of the birth, the child is Portuguese from birth. Where the birth took place in Portugal it is automatic. Where it took place abroad, the claim is confirmed by registering the birth in the Portuguese civil registry or by making a declaration.

There is no language requirement, no residence requirement, no criminal record certificate and no age limit. Recognition at seventy proceeds on the same terms as recognition at seven. The 2026 reform did not touch this route.

Documents required

• The applicant’s full narrative birth certificate, apostilled and translated
• The Portuguese parent’s Portuguese birth certificate, from the conservatória or the district archive
• The parent’s Portuguese identity document or passport
• The applicant’s passport or identity document, together with the signed declaration

Grandchild of a Portuguese national

Available where at least one grandparent was Portuguese by origin and did not lose that status. The applicant declares the wish to be Portuguese and demonstrates an effective connection to the national community. No residence in Portugal is required and there is no age limit.

Since 19 May 2026 grandchildren must also satisfy the integration requirements that apply to naturalisation applicants: the test on language and Portuguese culture, national history and symbols, an understanding of the rights and duties of citizenship and the organisation of the State, a solemn declaration of adherence to democratic principles, and the criminal, security and sanctions checks. The residence requirement is not imported, and neither is the means test.

This is the single most consequential change for descent applicants. Before the reform the effective-connection test was in practice satisfied by a language certificate. It now carries a broader civics component whose format has not yet been published.

Great-grandchild of a Portuguese national

A good deal of published commentary on this point is inaccurate, and the position should be stated plainly. The 2026 reform did not extend citizenship by descent to the third generation. Great-grandchildren cannot establish Portuguese nationality by genealogy alone, as children and grandchildren can.

What the reform introduced is a reduced qualifying period within naturalisation. A great-grandchild of an originary Portuguese national who has lawfully resided in Portugal for at least five years may be naturalised without completing the full seven or ten years. The reduction is discretionary, and every other naturalisation condition continues to apply, including the culture and civics requirement, the criminal and security screening and the subsistence test.

The provision is therefore of assistance to a great-grandchild already resident in Portugal. It affords no benefit to one who is not.

The chain method is usually better

Where a great-grandchild does not intend to relocate to Portugal, the alternative is almost always stronger. The intervening generation is recognised first. Once the applicant’s parent is recognised as the grandchild of a Portuguese national, the applicant becomes the child of a Portuguese national, a route carrying no residence or language requirement.

Proving an effective connection

The effective-connection requirement applies to grandchildren and, through the naturalisation conditions, to great-grandchildren. Under the framework in place until the reform, knowledge of Portuguese was the principal way of showing it, evidenced by a CIPLE certificate from CAPLE, a certificate of attendance on an accredited course, a diploma from a Portuguese educational institution, or schooling in a Portuguese-speaking country.

Other material supports the picture without replacing the language element: regular travel to Portugal, property held here, involvement in Portuguese cultural associations, family still resident in the country. How the new culture and civics component will be evidenced is one of the questions the amended Regulation is expected to answer.

What actually derails descent applications

Refusals are rarely about eligibility. They are about the paperwork.

• Name discrepancies. An ancestor recorded as José Maria da Silva in Portugal and Joseph Silva in the country of emigration. Older records are full of these and each has to be bridged with evidence or a rectification.
• Missing filiation. A child not formally recognised by the Portuguese parent, or a birth registered without the father named. This may require court proceedings before any nationality application can be made.
• Short-form certificates. Extracts are routinely rejected. Full narrative certificates are needed.
• Records held elsewhere than expected. A birth registered more than a century ago will sit in a district archive rather than in the IRN’s system, and locating it can take months.
• Expired criminal record certificates. These have short validity and often need reissuing mid-process.
• An apparently broken line. Frequently not broken at all, for the reasons set out in part six.

Where a parent was also born in Portugal

A person born in Portugal to foreign parents, where one of those parents was also born in Portugal and resident here at the time, is Portuguese from birth. No residence permit, no minimum period and no application are needed. This second-generation provision was untouched by the reform and is the strongest of the three.

Where a parent was lawfully resident

Children born in Portugal to foreign parents are Portuguese from birth where one parent had been lawfully resident here for at least five years at the moment of the birth. The threshold used to be one year, so this is among the most consequential changes of 2026 for families already settled in Portugal.

Proof is made at the time of the declaration, by producing the parent’s identity document together with their residence title.

Naturalisation of a minor born in Portugal

Where the five-year test is not met at birth, a child born in Portugal can still be naturalised later. One parent must have five years of lawful residence and the child must be enrolled in and regularly attending compulsory schooling. Before the reform these were alternative conditions and either would do. They are now cumulative. The procedure remains free of charge.

A separate provision covers children in institutional care under a definitive protection measure, promoted by the Public Prosecutor and weighing the best interests of the child. It is also free.

Born in Portugal without any other nationality

Anyone born on Portuguese territory who would otherwise hold no nationality is Portuguese from birth. Newborns found abandoned in Portugal are presumed to have been born here.

Marriage to a Portuguese national

After three years of marriage an application may be made by declaration, with no obligation to have resided in Portugal. For applicants already partway through a qualifying residence period, this route frequently completes first.

The application can be refused where there is a serious criminal record, a national security concern or an international sanctions listing. Since the reform those grounds bar acquisition directly rather than merely supporting a later objection.

For the first two years after registration the Public Prosecutor may object on the ground that there is no real connection to Portugal. That objection is no longer available once the marriage has lasted more than six years, or where the couple have Portuguese children together.

A declaration of nullity or annulment of the marriage does not affect nationality acquired by a spouse who married in good faith. Divorce after the process completes does not undo the nationality.

De facto partnership

Unmarried partners of Portuguese nationals can apply on the same three-year basis, but only after a Portuguese court has issued a judgment recognising the partnership. That court step has to be completed before the nationality application is made, and it usually sets the timetable for the whole matter rather than the registry does.

Adoption

A child adopted by a Portuguese national acquires nationality by declaration. Until the reform it followed automatically from the adoption itself. The practical consequence of the change is that an adopted child’s status now sits within the two-year objection window, which was not previously the case.

Minor children of a new Portuguese national

Where a parent acquires Portuguese nationality, their minor children may acquire it too, through a declaration made on their behalf. The interaction with part two should be noted. Where the parent’s own claim is one of nationality from birth rather than acquisition, the children hold a stronger claim in their own right as children of a Portuguese national, and that is ordinarily the better route.

The qualifying period of residence

What counts as lawful residence

Lawful residence means being in Portugal with a regularised status under any title, visa or authorisation in the immigration or asylum framework. That is broader than a residence card alone.

It includes:

• Golden Visa residence permits, including the low-stay years
• D7 passive income and retirement permits, and D8 digital nomad permits
• D2 entrepreneur and work-based permits
• Family reunification permits and student residence permits
• Residence under EU free movement rules and under the CPLP mobility agreement
• Asylum and subsidiary protection status

What does not count is time spent in Portugal without a title. Time awaiting a first decision from AIMA is a recurring point of dispute and should be assessed on the facts rather than assumed either way.

The counting window

Separate spells of residence can be added together, whether continuous or interrupted, but only if they all fall inside an outer window. A window has existed for some time and used to run to fifteen years. The reform cut it to nine years for nationals of Portuguese-speaking countries and EU citizens, twelve for other nationalities and six for stateless applicants, which is short enough to be material for any applicant whose residence in Portugal fell into two separate periods.

Other routes within naturalisation

Several categories are naturalised on terms of their own, and three of them carry no fee.

• Minors born in Portugal. One parent must have been lawfully resident for five years and the child must be enrolled in and regularly attending compulsory schooling. The procedure is free of charge.
• Children in institutional care. Available where a definitive protection measure is in place, with the procedure promoted by the Public Prosecutor and the best interests of the child weighed in the decision. Free of charge.
• Stateless applicants. Four years of lawful residence, and the subsistence requirement does not apply. Free of charge.
• Great-grandchildren of Portuguese nationals. Five years of lawful residence in place of the ordinary seven or ten. Every other condition continues to apply, and the standard fee is payable.
• Former Portuguese nationals. Open to a person who lost Portuguese nationality, never acquired another, and retains an effective connection to the national community. No residence period is required. Standard fee.
• Relevant services to the Portuguese State. Discretionary, with both the residence period and the language requirement waived. Standard fee.

The residence permit must be renewed throughout.

A citizenship applicant remains a foreign national until registration is complete, the permit must be valid at the date of filing, and allowing it to lapse mid-process can undermine a residence position built over several years.

An earlier version of the reform was referred to the Constitutional Court during 2025. The Court held several of its provisions unconstitutional, and the text had to be reworked before it could proceed.

The revised version was approved by the Assembleia da República on 1 April 2026 and promulgated by the President on 3 May.

Publication in the Diário da República followed on 18 May, accompanied by a rectification issued the same day which corrected an error in the criminal record provision. The law entered into force the following day, 19 May 2026.

What changed

The amendments fall into three groups. Those affecting naturalisation are the most far-reaching, but the reform also reaches attribution at birth and the mechanics of registration, which has received less attention.

Naturalisation

• Residence. Five years for every nationality became seven years for nationals of Portuguese-speaking countries and citizens of EU member states, and ten years for all others.
• Language and civics. Sufficient knowledge of Portuguese, in practice evidenced at A2, was replaced by a broader requirement covering the language together with Portuguese culture, national history and symbols, knowledge of the rights and duties attaching to citizenship and of the organisation of the State, and a solemn declaration of adherence to the principles of the democratic rule of law.
• Means. Not previously a condition. The applicant must now have the capacity to ensure their own subsistence.
• Criminal record. The former bar caught any conviction to three years or more for any crime punishable under Portuguese law. It now applies only where an effective prison sentence of more than three years was imposed, and only for a defined list of serious offences. It also operates as a rebuttable presumption rather than an absolute bar.
• International sanctions. Newly a condition in its own right. An applicant must not be the subject of restrictive measures adopted by the United Nations or the European Union.
• Counting residence. Separate periods could previously be aggregated within an outer window of fifteen years. That window was cut to six, nine or twelve years according to the applicant.

Attribution at birth

• Grandchildren. The route survives on the same terms, but the effective-connection test, previously satisfied in practice by a language certificate, now carries the integration and screening conditions applicable to naturalisation.
• Children born in Portugal to foreign parents. The parental residence required at the date of the birth rose from one year to five. The provision was also recast as a claim to be asserted rather than an entitlement operating unless the parents opted out.
• Minors born in Portugal. Three alternative conditions, any one of which sufficed, were replaced by cumulative ones: five years of parental lawful residence and regular attendance at compulsory schooling.
• Family routes and procedure
• Adoption. Nationality formerly followed from the adoption automatically. It is now acquired by declaration, which brings an adopted child within the two-year objection regime.
• Registration. Registration previously recorded the act. It is now constitutive, so the status exists in law only once the entry is made.
• Consular declarations. These could formerly be made remotely. They must now be given in person, waived only on proof of lasting or permanent physical incapacity.

Routes that closed

• Descendants of Portuguese Sephardic Jews. The regime created in 2013 and progressively narrowed from 2022 was repealed outright. Applications filed before 19 May 2026 continue under the earlier rules, and those who already obtained nationality keep it. We continue to act on pending files, including where a refusal needs to be challenged.
• Ascendants of Portuguese citizens. The route introduced in 2024 for parents and grandparents of Portuguese nationals resident in Portugal was withdrawn.
• Adults born in Portugal. Naturalisation for adults born on Portuguese territory who had lived here for the preceding five years was repealed. Many people in this position are in fact Portuguese from birth on another basis, which is worth checking before assuming the position is lost.

Who is still governed by the old rules

An applicant whose nationality application had already been lodged when the new law took effect is assessed under the wording in force at the date of filing. Given the time the registry takes over adult grandchild files, applications from 2023 and 2024 continue to be decided on the former basis and will be for some years.

There is a second reason to be familiar with the former regime. Where a family member was refused in 2019 or 2022, the correctness of that refusal falls to be judged against the law as it then stood rather than the law as it now stands. Some of those decisions were wrong, and a proportion of them remain open to challenge.

• Assessment and strategy. A clear answer on whether a claim exists, which route to use, what it will take and what could go wrong. Where no route is currently open, we say so and set out what would need to change.
• Genealogical and documentary work. Tracing and obtaining records across jurisdictions, arranging legalisation and certified translation, and resolving registry discrepancies before they become grounds for refusal.
• Court applications. Establishing parentage, recognising de facto partnerships, rectifying civil status records, and obtaining recognition of foreign judgments where Portuguese effect is needed.
• Residence permits. Where the route runs through residence we handle the underlying immigration matter, from the initial visa through renewals to the point where the qualifying period is complete.
• Refusals and objections. Challenging refusals before the administrative courts and defending objections raised by the Public Prosecutor within the two-year window.
• Tax and succession. The acquisition of Portuguese nationality does not of itself alter a client’s tax position, though relocation to Portugal will. This firm coordinates nationality work with advice on tax residence, the inbound residents regime and cross-border succession.

Disclaimer

This publication or document contains general information and is not intended to be comprehensive nor to provide legal or tax advice or services. It should not be acted upon, relied upon, or used as a basis for any decision or action that may affect you or your business. Professional legal advice should be requested for specific cases. We do not undertake any continuing obligation to advise on future legal amendments or of the impact on the conclusions herein. Prior results do not guarantee a similar outcome. The contents of this publication or document may not be reproduced, in whole or in part, without the express consent of GFDL Advogados.