Married to a Portuguese citizen: three years, one form

If you have been married to a Portuguese citizen for more than three years, Portuguese law gives you your own route to citizenship — and it is the shortest one there is. It asks for no years of residence in Portugal, no citizenship test and no court hearing. It asks for one thing: a declaration, filed while the marriage still exists.

Almost everything written in English about Portuguese citizenship describes something else: naturalisation, the application made by someone who has lived in Portugal for seven or ten years, which the 2026 reform of the nationality law made considerably harder. Marriage is not that. It is an acquisition by your own declared will, which the State verifies rather than grants. This guide walks the whole regime: the clock, the word that closes the door, what you hand in, and what happens if the marriage is later annulled.

How long, and from when?

More than three years, counted from the marriage itself. The statute is worth reading in the original, because everything else follows from its wording:

Notice what it does not say. It does not say you must live in Portugal. It does not say you need a residence permit. It does not say the three years must be spent in the country, or even that the couple must live together. It says you must have been married for more than three years to someone who is Portuguese. A couple who married in São Paulo and still live there meets this requirement exactly as a couple in Lisbon does.

The flip side is that the clock does not start when you arrived in Portugal or when you applied for residence: the statute counts the marriage. If you married abroad, the marriage certificate is still the document that proves it to the registry — and the Nationality Regulation lets that certificate be obtained internally, as long as you give the details that identify the record.

You have to still be married when you file

This is the part that surprises people, and the reason not to leave it for later. Portuguese uses a phrase with no clean English equivalent — na constância do casamento, roughly «while the marriage subsists». The declaration must be filed during the marriage. Once a divorce dissolves it, the ground for the declaration disappears with it, however many years of marriage came before.

This is not an inventive reading: the Nationality Regulation repeats the requirement in the same words when it describes the act itself. Two practical consequences follow. If you are divorcing and already meet the three years, you have a window — and it closes with the divorce decision, not with the separation. And if your Portuguese spouse dies, the marriage is dissolved too; nothing in the statute carves out widowhood for this declaration, so that situation has to be looked at under a different route.

No residence, no test, no court

Three absences worth naming, because each one is a question that arrives daily.

The third row is the sharpest distinction of the four, and the 2026 reform made it sharper still: if you are married, you file at the registry office; if you live with a Portuguese partner without being married, a court must recognise the relationship first. One statute covers both situations in separate paragraphs, and only one of them involves a judge.

What the 2026 reform changed here — and what it left alone

Lei Orgânica n.º 1/2026 came into force on 19 May 2026, the day after publication. It did touch the marriage route, but far more narrowly than the public conversation suggests. In the amending text, the first two paragraphs of the marriage provision appear as «[…]» — the drafter's mark for «this paragraph stays as it is». The three-year period and the good-faith spouse protection went through the reform without a single word changed.

What is new is an entire paragraph added at the end: acquisition by marriage or de facto union now depends on none of the situations in points f) to h) applying — the criminal and national-security filter that already applied to naturalisation. The change is structural rather than cosmetic. A criminal record used to reach this route only afterwards, through an objection raised by the public prosecutor; it is now a condition of the acquisition itself, checked at the counter. What counts and what does not is set out in our guide to convictions that block a citizenship application.

One transitional rule answers half the date questions people ask: administrative procedures already pending when the new law came into force are decided under the previous wording. If your declaration was filed before 19 May 2026, the old rules follow it — a subject with its own guide on pending applications.

What you actually hand in

The base list is short. The Nationality Regulation requires the declaration to be accompanied by the marriage certificate and by the birth certificate of the Portuguese spouse. That is all — and even those two can be waived: you simply state the details that identify the records (place and date of the marriage or birth, and the registry office holding them, if you know it) and they are obtained internally. If the records are already held by the Central Registry Office, the waiver is automatic.

The same applies to the Portuguese criminal record and to the residence documents issued by AIMA: the statute says outright that these are obtained by the service itself, electronically where possible. What is not waived is your foreign criminal record — from your country of birth, your country of nationality, and any country you lived in after reaching the age of criminal responsibility. Since 2026 that is no longer a detail: it is what feeds the check described above.

One point almost nobody mentions: the declaration form itself includes, by regulation, a statement about facts that could ground an objection. It is not a blank formality — it is where you speak to your own case before anyone else does. Your signature must also be certified in person, unless you sign it in front of the official receiving the declaration.

An honest caveat about the list: the Government was given 90 days from 18 May 2026 to bring the Nationality Regulation into line with the new law, and that update has not been published, so the provisions describing the paperwork are still the pre-reform ones — accurate about what you file, silent about the new requirement.

What if the marriage is annulled later?

This is the most generous rule on the route, and the least known. If the marriage is later declared null or annulled, that does not affect the citizenship already acquired by a spouse who entered into it in good faith. The citizenship does not unwind with the marriage.

«Good faith» is a technical term here, defined by the Civil Code: you are in good faith if you married in excusable ignorance of the defect that made the marriage void or voidable, or if your consent was extracted by coercion. Two safeguards come with the definition, and both favour the person on the wrong side of the story: good faith is presumed, and only the State's courts may rule on it. A registry official does not get to decide whether you believed in your own marriage.

In plain terms: someone who married in good faith a person who turned out to be already married elsewhere, and only discovered it years later, does not lose the citizenship acquired in the meantime — even though the marriage itself disappears retroactively from the record. The rule exists precisely for people who were deceived.

After you file: objection, and the date that counts

Once the declaration is in, a stage begins that is not yours to drive: the public prosecutor may object to the acquisition. The classic ground is the absence of a genuine connection to the national community — and this, and only this, is where knowledge of Portuguese language and culture can reach this route, because since 2026 that connection is assessed against parameters that include language and culture. How the connection is evidenced is covered in our guide to proving an effective connection.

There is a shield, and it has a limit worth knowing. No objection may be raised where the marriage has lasted more than six years, or where the couple have common children who are Portuguese. Since the reform, though, that shield no longer covers the criminal grounds in points f) to h). Six years of marriage protect you from the connection argument; they do not protect you from the criminal one.

Finally, the date that matters is not the date of the decision: changes of nationality take effect only from the date of registration. Until the entry is made you are not Portuguese for any purpose — not for a citizen's card, and not for passing citizenship to a child born in the meantime.

Where to go from here

If you meet the three years and you are still married, the next practical step is to gather the details of your marriage and of your spouse's birth record and book the filing of the declaration. If you are not yet sure which route is yours — marriage, de facto union, descent, naturalisation — start by identifying your application type, because everything else depends on it.

And if your case does end up going through naturalisation — for a child, a relative, or for you at a later date — our free practice quiz shows you in ten minutes what kind of knowledge about Portugal that path involves.