Swedish Citizenship by Descent (Children Born Abroad)

What "citizenship by descent" means

Citizenship by descent — sometimes called ius sanguinis, "right of blood" — means a child becomes a citizen because of who their parent is, not because of where they were born or how long they have lived somewhere. In Sweden, this happens automatically at the moment of birth.

This is a crucial distinction that confuses many families: citizenship by descent is not an application. There is no form to fill in to "become" a citizen, no fee for the citizenship itself, no waiting for a decision, and no test. If the legal conditions are met, the child is already a Swedish citizen from the day they are born.

What you do still need to do is document and register that the child is Swedish — by registering the child with the Swedish authorities and, when you want one, applying for a Swedish passport. Those are administrative steps that confirm and prove a citizenship the child already has. They are not how the child acquires it.

This puts descent in a completely separate category from citizenship for children by application, which is the route used when a child is not Swedish by birth and the family wants to apply.

The current rule: born after 1 April 2015 + one Swedish parent

The rule that applies to children born today is straightforward:

Two parts of this are worth underlining:

• Either parent. It does not matter whether it is the mother or the father who is Swedish. If one parent holds Swedish citizenship at the time of the birth, that is enough.
• Any country. The child can be born in Sweden or anywhere else in the world. A child born in another country to a Swedish parent is Swedish by descent in exactly the same way as a child born in Stockholm.

The key timing point is that the parent must be a Swedish citizen at the time of the child's birth. If a parent becomes Swedish later, that does not retroactively make a child who was born earlier Swedish by descent — a different route would be needed for that child. Sweden also allows dual citizenship, so a child acquiring Swedish citizenship by descent can normally keep any other nationality they hold as well. You can read more about that in our guide to what changed for Swedish citizenship in 2026.

The 1 April 2015 cutoff and why it matters

The date 1 April 2015 is a genuine cutoff in Swedish nationality law, and it is important to state it precisely. The "either parent, automatically, regardless of marriage" rule above applies to children born after 1 April 2015.

Before 1 April 2015, the rules were different. The most significant difference affected children born outside Sweden to a Swedish father when the parents were not married. In those cases, the child did not always acquire Swedish citizenship automatically from the father. This is why the cutoff still matters years later: families with a child born abroad and outside marriage to a Swedish father before 1 April 2015 may not be covered by automatic descent.

For exactly those situations, Swedish law provides a notification (anmälan) route. A notification is a simpler procedure than a full citizenship application and is specifically designed to let certain people acquire citizenship that the older rules did not grant automatically. Fathers of children born outside marriage and outside Sweden before 1 April 2015 are one of the groups this route is meant to help.

If this describes your family, the notification path is likely the relevant one rather than waiting for automatic descent that the older law never provided. See our dedicated guide to the citizenship notification (anmälan) route for how that procedure works and who qualifies.

Registering a child born abroad

Even though the child is already a citizen, you should make sure that is recorded in the Swedish system. If a child is born outside Sweden, the parent should:

• Contact the Swedish Tax Agency (Skatteverket) to register the child in the Swedish Population Register (folkbokföring).
• Submit a name registration for the child so the child's name is officially recorded.

Registration with Skatteverket is the practical foundation for almost everything else. It is how the child's existence, name, and Swedish status become part of the official record. Doing this early avoids problems later when you need to prove the child's citizenship — for example when applying for a passport.

Getting a Swedish passport for a child born abroad

A Swedish passport is the everyday proof of a child's Swedish citizenship, and it is often the first practical reason families act. To apply for a Swedish passport for a child:

• From within Sweden: contact the Swedish Police during a visit to Sweden.
• From abroad: contact the nearest Swedish embassy or consulate-general.

Because the child is a citizen by descent, the passport application is confirming an existing status rather than granting citizenship. In practice the authorities will want to see that the child is properly registered first, which is why the Skatteverket registration step above matters so much. If the population-register and name details are already in order, the passport step is far smoother.

The 22-year rule: keeping citizenship if born and raised abroad

There is one rule every family with a child who is Swedish by descent but lives abroad should know about — the 22-year rule.

The idea behind the rule is that citizenship should reflect a genuine connection to Sweden. Someone who was born abroad, raised abroad, and has never lived in Sweden can be required to actively confirm, before age 22, that they want to remain Swedish. If they take no action, the citizenship can lapse.

For parents, the practical takeaway is to be aware of this well before a child approaches their early twenties — not in the final weeks. Visits to Sweden and, in some cases, an application to keep citizenship can preserve the connection. The exact ways to meet the requirement are set by the authorities, so confirm them directly.

Separately, there is a 2026 reform path for people who already lost their citizenship under this rule and want to regain it. If that has happened in your family, see our guide on regaining Swedish citizenship in 2026.

How this differs from naturalisation

A lot of anxiety in 2026 comes from confusing two completely different things: automatic citizenship by descent and citizenship by application (naturalisation). They are not the same, and the new rules do not affect them equally.

The broad citizenship reform that took effect on 6 June 2026 — with a longer residence requirement (commonly described as eight years), an income requirement, a civics test, and a conduct requirement — applies to applications for naturalisation. It does not apply to a child who is Swedish automatically by descent at birth. A newborn who acquires citizenship from a Swedish parent does not face a residence period, an income test, a civics exam, or a conduct check, because the child is not applying for anything.

One other 2026 change is sometimes mixed up with descent: from 6 June 2026, children can no longer be included in a parent's citizenship application — a child who needs to apply must have their own application, signed by a parent or guardian. That change is about the application route. It does not touch citizenship by descent, which is automatic and is not an application at all.

In short: if your child is Swedish by descent, the 2026 naturalisation reforms are simply not relevant to that child's citizenship. They become relevant only if a family member instead needs to apply for citizenship. For the full picture of the application-side changes, see what's new for Swedish citizenship in 2026. And if anyone in the family is preparing to apply and will need the civics test, our Swedish citizenship test resources are built for exactly that.

Frequently Asked Questions

Sources

• Migrationsverket — Automatic citizenship for children
• Migrationsverket — Citizenship for children
• Swedish nationality law (overview)