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How to Get United Kingdom Citizenship

A foreign resident can qualify for naturalisation in the United Kingdom after 5 years of residence, if the other legal conditions are met. 88 of 177 countries with a residence route ask for 5 years or fewer. The 11 routes in the law are set out below, with legal references and later changes.

Key facts

Based on GLOBALCIT data, not yet verified by our team
Residence for naturalisation
5 years1 change not yet in force and not applied: see the timeline.
Language
Test or certificate
Dual citizenship
Accepted
Civic test
Required, with a test or certificate
Criminal record
A criminal record or good character condition applies
Income condition
No income condition in the law
Dual citizenship in detail
Accepted in both directionsNew citizens do not have to give up their previous citizenship.Citizens who naturalise abroad keep their citizenship.
Available routes
Region
Europe
Law in force as of
1 January 2024
Last checked
5 November 2026

What changed since 2024

  1. Proposal

    'Earned settlement' model: baseline qualifying period for indefinite leave to remain (a prerequisite for naturalisation) proposed at 10 years instead of 5.

    Secondary source (law firm or media). Source: garthcoates.com

The rule text in the sections below was coded for the law on 1 January 2024. The changes in the timeline above are not in force and are not applied.

11 routes in the law of the United Kingdom.

Naturalisation (residence)

Discretionary

For foreign nationals living in the United Kingdom, this is the ordinary route based on residence. Even if the legal conditions are satisfied, authorities may still decide to refuse.

Proposal, 20 November 2025: 'Earned settlement' model: baseline qualifying period for indefinite leave to remain (a prerequisite for naturalisation) proposed at 10 years instead of 5.

Residence
5 years

Person has been resident in the UK for 5 years, intention to have principal home in the country and to continue residence in or service for the UK.

Previous citizenship
New citizens do not have to give up their previous citizenship
Language
Required, with a test or certificate

Sufficient knowledge of one of the languages of the country required (test).

Civic knowledge
Required, with a test or certificate

Sufficient knowledge about life in the UK required (test), oath of allegiance at citizenship ceremony.

Criminal record
A criminal record or good character condition applies

Good character required.

Income or economic resources
No income condition in the law
DiscretionaryAuthorities decide whether to grant citizenship and may refuse even if the conditions are met.Nationality law: Art. 6(1), 40-42B

Marriage or civil partnership

Discretionary

For spouses of citizens of the United Kingdom, the rules below set out what this route requires. Even if the legal conditions are satisfied, authorities may still decide to refuse.

Person is the spouse or civil partner of a citizen and has been resident in the UK for 3 years. Other conditions: see the rules for ordinary naturalisation.

DiscretionaryAuthorities decide whether to grant citizenship and may refuse even if the conditions are met.Nationality law: Art. 6(2)

Descent (citizen parent)

AutomaticDiscretionary

This route covers children of a citizen of the United Kingdom, subject to the conditions below.

Descent (born in country)

Person is born in the UK to a citizen.

AutomaticCitizenship follows from the law. No decision by an authority is needed.Nationality law: Art. 1(1)(a)

Descent (born abroad)

Automatic acquisition of British citizenship by descent if person is born abroad to a citizen who acquired citizenship otherwise than by descent or is in the public service.

AutomaticCitizenship follows from the law. No decision by an authority is needed.Nationality law: Art. 2

Descent (born abroad)

Entitlement to register as a British citizen if person is a minor whose parent acquired citizenship by descent and has resided at any time in the UK for 3 years: entitlement while child is minor. The parent's own British parent must have acquired citizenship otherwise than by descent. Other conditions: good character if person is over 10 years old. Person may not be an ineligible person ex Illegal Migration Act (i.e. due to irregular entry) OR person is a minor whose parent is a citizen by descent and the child and both parents (unless one is dead or divorced) live in the UK for a period of three years and both parents consent (unless one parent has died). Other conditions: good character if person is over 10 years old. Person may not be an ineligible person ex Illegal Migration Act (i.e. due to irregular entry)

DiscretionaryAn application is required. The authority may refuse it even if the conditions are met.Nationality law: Art. 3(2), 3(5), 41A

Birth in the country

AutomaticDiscretionary

Birth in the United Kingdom is the starting point of this route, together with the conditions below.

Birth in country

Person is born in the UK to a parent who is resident there without immigration restrictions.

AutomaticCitizenship follows from the law. No decision by an authority is needed.Nationality law: Art. 1(1)

Birth in country

Person is born after 1 July 2021, parent was granted indefinite leave under paragraph EU2 of Appendix EU to the UK immigration rules before 1 July 2021 or would have met eligibility requirements before that date, and parent is ordinarily resident in the United Kingdom.

AutomaticCitizenship follows from the law. No decision by an authority is needed.Nationality law: Art. 10A

Birth in country (acquisition after birth)

Person is born in the UK, is 10 years or older and resided in the UK during the first 10 years after birth (maximum absence from the UK for 90 days any one year). Other condition: good character.

DiscretionaryAn application is required. The authority may refuse it even if the conditions are met.Nationality law: Art. 1(4)

Birth in country (acquisition after birth)

General discretion to register any minor. Person may not be an ineligible person ex Illegal Migration Act (i.e. due to irregular entry)

DiscretionaryAn application is required. The authority may refuse it even if the conditions are met.Nationality law: Art. 3(1)

Birth in country (acquisition after birth)

Child born in UK whose parents become settled (permanent residents) during minority may apply to register.

DiscretionaryAn application is required. The authority may refuse it even if the conditions are met.Nationality law: Art. 1(3)

Birth in country (acquisition after birth)

Child born in UK whose parent joins armed forces during minority may apply to register.

DiscretionaryAn application is required. The authority may refuse it even if the conditions are met.Nationality law: Art. 1(3A)

Child of a new citizen

Discretionary

A parent acquiring citizenship of the United Kingdom is the basis of this route. Even if the legal conditions are satisfied, authorities may still decide to refuse.

Person is a minor who is born in the UK and whose parent acquires citizenship or becomes settled in the UK. Other conditions: good character if person is over 10 years old.

DiscretionaryAn application is required. The authority may refuse it even if the conditions are met.Nationality law: Art. 1(3), 41A

Adoption

Automatic

This route covers people adopted by a citizen of the United Kingdom, subject to the conditions below. Citizenship arises directly under the law of the United Kingdom, without any authority making a decision.

Person is a minor who is adopted by a citizen.

AutomaticCitizenship follows from the law. No decision by an authority is needed.Nationality law: Art. 1(5)

Other family members of citizens

Discretionary

A family tie to a citizen, former citizen or new citizen of the United Kingdom is the basis of this route. Even if the legal conditions are satisfied, authorities may still decide to refuse.

A person who is married to a British citizen at the time of application needs only three years' lawful residence and indefinite leave to remain (compared to five years residence and one years ILR for other applicants). Thus, a person who meets those criteria and who is married to a British citizen at the time of application can apply under this section even if that was not the basis for their admission.

DiscretionaryAuthorities decide whether to grant citizenship and may refuse even if the conditions are met.Nationality law: BNA 1981 6(2)

Former citizens (reacquisition)

Entitlement

Earlier citizenship of the United Kingdom is the basis of this route. Citizenship must be granted under the law of the United Kingdom once an application meets the legal conditions.

Person has previously renounced citizenship. Entitlement to register if the person has done so in order to obtain citizenship of another country. In other cases registration depends e.g. on person's intention to reside in the UK. Other condition: good character. Special rules for citizens with restricted citizenship rights (from former UK colonies). Person may not be an ineligible person ex Illegal Migration Act (i.e. due to irregular entry)

EntitlementAn application is required. If the legal conditions are met, citizenship must be granted.Nationality law: Art. 13, 10

Ethnic or cultural affinity

Discretionary

An ethnic or cultural connection to the United Kingdom is the basis of this route. Even if the legal conditions are satisfied, authorities may still decide to refuse.

Person would have been able to become British citizen but for historical legislative unfairness (e.g. gender discrimination or birth out of wedlock), an act or omission of a public authority, or exceptional circumstances relating to the person.

DiscretionaryAuthorities decide whether to grant citizenship and may refuse even if the conditions are met.Nationality law: Art. 4L

Stateless persons

AutomaticDiscretionaryEntitlement

For people without any citizenship, the rules below show what the law of the United Kingdom provides.

Foundlings

Person is a newborn child born in the UK of unknown parentage.

AutomaticCitizenship follows from the law. No decision by an authority is needed.Nationality law: Art. 1(2)

Otherwise stateless (born in country)

Person is born in the UK, under the age of 22, has been stateless since birth and resident in the UK for 5 years (maximum absence from the country for a total of 450 days).

DiscretionaryAn application is required. The authority may refuse it even if the conditions are met.Nationality law: UK, Schedule 2(3)(1)

Stateless persons

Person is born abroad to a citizen, a citizen with restricted citizen rights, or a former UK subject, has been stateless since birth and resident in the UK for 3 years (maximum absence from the UK for 270 days).

EntitlementAn application is required. If the legal conditions are met, citizenship must be granted.Nationality law: UK, Schedule 2(4)(1), 2(4)(5)

Public or military service

Discretionary

Public or military service for the United Kingdom is the basis of this route. Even if the legal conditions are satisfied, authorities may still decide to refuse.

Person has served the UK, an international organisation of which the UK is a member, or a company or association based in the UK, for 5 years. Other condition: good character.

DiscretionaryAuthorities decide whether to grant citizenship and may refuse even if the conditions are met.Nationality law: Art. 6(1), Schedule 1(1)(d)(ii), 1(3)

Person is a citizen with restricted citizen rights or a former UK subject, and served the UK in colonial times.

DiscretionaryAn application is required. The authority may refuse it even if the conditions are met.Nationality law: Art. 4(5)

Not available in the United Kingdom: Citizens of specific countries, Residence during childhood, Very long residence, Refugees, Special achievements, Investment. Based on the GLOBALCIT coding of the law, updated with in-force changes.

Dual citizenship

The United Kingdom accepts dual citizenship in both directions.

New citizens
New citizens do not have to give up their previous citizenship
Citizens who naturalise abroad
Citizens who naturalise abroad keep their citizenship

Compare with neighbours

Among the 10 countries in Northern Europe with a residence route, the most common requirement is 8 years, while the United Kingdom sets 5 years.

Countries in Northern Europe with the closest residence requirement
CountryResidenceLanguageDual citizenship
Estonia8 yearsRequired, no testCitizens abroad only
Finland8 yearsTest or certificateAccepted
Iceland7 yearsRequired, no testAccepted
Ireland5 yearsNoneAccepted
Latvia5 yearsRequired, no testNot accepted
Norway8 yearsTest or certificateAccepted

Official sources

This page was located by search and has not yet been checked by our team.

Naturalisation provisions: Nationality law: Art. 6(1), 40-42B.

Cite this page

APA citation
TravelDecl. (2026, November 5). How to Get United Kingdom Citizenship. https://traveldecl.com/citizenship/united-kingdom/
HTML link
<a href="https://traveldecl.com/citizenship/united-kingdom/">How to Get United Kingdom Citizenship</a> (TravelDecl, last checked 5 November 2026)

Sources and licence

Vink, van der Baaren, Bauböck, Džankić, Honohan, Manby (2025). GLOBALCIT Citizenship Law Dataset v3.1. Global Citizenship Observatory, https://hdl.handle.net/1814/73190. CC BY 4.0. Modified by TravelDecl.

Modified by TravelDecl: updated with changes after 1 January 2024.

GLOBALCIT codes the law as written. Fees, processing times, quotas and how officials apply the rules in practice are not in this dataset: check them with the official authority.

FAQ

How many years to become a British citizen?

5 years of residence, under the ordinary naturalisation route. The conditions that come with it are listed on this page. A change that is not yet in force may affect this: see the timeline above.

Does the United Kingdom allow dual citizenship?

Yes. The law of the United Kingdom accepts dual citizenship for new citizens and for citizens who naturalise abroad.

Do I need a language test for British citizenship?

Yes, British citizenship requires a language test or certificate.

Is there a civic knowledge test for British citizenship?

Civic knowledge is required for British citizenship, assessed through a test or certificate.

Do I have to give up my current citizenship to get British citizenship?

No, you do not have to give up your current citizenship to get British citizenship. The law of your current country may have its own rules on this.

Can I get United Kingdom citizenship by marriage?

Yes, the law of the United Kingdom has a route for spouses. Procedure: discretionary.

Can I get United Kingdom citizenship by descent?

Yes. A child of a citizen can acquire citizenship of the United Kingdom by descent. Procedure: automatic, discretionary.

Can I get United Kingdom citizenship by investment?

No investment route is coded in the law of the United Kingdom.

Also see: United Kingdom passport, visa-free access and entry rules. Latest law changes.

Sarah Kim

Corrections to this page are handled by Sarah Kim, Fact-Checker.