Record number of Americans apply for British citizenship

British citizenship applications by US citizens have surged over the last couple of years, according to data published by the Home Office.

But why is it becoming so attractive to so many Americans? In this article, we outline the main benefits of British citizenship and how to apply through ‘naturalisation’.

The data

Applications for British citizenship reached a record high of 9,270 in 2025, up 50% from 2024 (a previous record high at 6,193 applications) and 90% up on applications in 2023.

Applications continued to surge in the first quarter of 2026, with 2,654 applications from US citizens — another new record high.

The benefits of British citizenship

British citizens can live and work in the UK freely without any immigration controls. They can apply for a British passport, register to vote in elections, and access free healthcare through the NHS. The UK allows dual citizenship (also known as dual nationality) which means Americans can reap the benefits of both UK and US citizenship.

Requirements for British citizenship

British citizenship is open to people who have fulfilled several requirements, including factors such as how long they have lived in the UK, whether they are married to a British citizen and whether they have British parents. 

The most common route for Americans is through ‘naturalisation’ which is based on time spent in the UK. You will have held permission to remain in the UK on an eligible visa route before applying to settle in the UK (also known as indefinite leave to remain), typically after 5 years.

If you are married to a British citizen, you can apply to naturalise as soon as you have been granted indefinite leave to remain. For everyone else, you must wait 12 months from the date on which you were granted indefinite leave to remain.

Other requirements of naturalisation include:

• Physical presence in the UK

• Permanent immigration status

• Absence requirement

• Knowledge of English language and life in the UK

• Intention to live in the UK

• Good character requirement

Evidence of identity

If you were issued with a Biometric Residence Permit, you must provide/use it in support of your application (even if it has expired), alongside:

• Your passport or

• National identity card or

• Home Office travel document or

• Home Office entitlement card or

• Home Office ARC letter or

• Your birth certificate or

• Your photo driving licence or

• A bank, building society or credit card statement issued to you within the last 6 months

If you have changed name and/or gender and do not have, or cannot obtain, any of these documents in your acquired identity you are also required to provide evidence of that change. This can include:

• a Gender Recognition Certificate or

• a letter from your doctor or medical consultant confirming that your change of gender is likely to be permanent

• change of name deed poll

• marriage certificate

• a civil partnership certificate

Not married to a British citizen

If you are not married to a British citizen (or do not wish to rely on your marriage to a British citizen), the Home Office must be satisfied that:

• You were physically present in the UK exactly five years before it receives your application. For example, if the Home Office receives your application on 20 July 2026 but you left the UK on 10 July 2022 and returned on 25 July 2022, you would not qualify. You would need to wait until 24 July 2027 to apply.

• You have not spent more than 450 days outside the UK during the five years before your application.

• You have not spent more than 90 days outside the UK during the twelve months before your application.

• You have not at any time in the five years been in breach of UK immigration laws.

• You have not held any time-limited immigration permission currently or in the past twelve months prior to your application.

• You are of good character.

• You have sufficient knowledge of the English, Welsh or Scottish Gaelic language.

• You have passed the Life in the UK test.

• Your home (or principal home) will be in the UK.

Married to a British citizen

If you are married to a British citizen, the Home Office must be satisfied that:

• You were physically present in the UK exactly three years before it receives your application. For example, if the Home Office receives your application on 20 July 2026 but you left the UK on 10 July 2024 and returned 25 July 2024, you would not qualify. You would need to wait until 24 July 2027 to apply.

• You have not spent more than 270 days outside the UK during the three years before your application.

• You have not spent more than 90 days outside the UK during the 12 months before your application.

• You have not at any time in the three years been in breach of UK immigration laws.

• You have not held any time-limited immigration permission currently or in the past twelve months prior to your application.

• You are of good character.

• You have sufficient knowledge of the English, Welsh or Scottish Gaelic language.

• You have passed the Life in the UK test.

The application costs £1,735 (this includes the citizenship ceremony fee). You will also have to enrol your biometrics at a local visa centre and attend a citizenship ceremony if your application is successful.