British citizenship may be acquired automatically, by registration or by naturalisation, depending on a person’s circumstances. For most settled adults, naturalisation is the relevant application route.
British citizenship is a nationality status, not an immigration visa.
Reviewed by the Morgan Smith Immigration team — IAA-regulated UK immigration specialists. Last reviewed 2026-07-29.
TL;DR
British citizenship gives a person the right of abode and the ability to apply for a British passport, but eligibility depends on the correct statutory route. Adult naturalisation costs £1,839, citizenship itself has no expiry date, and a standard naturalisation decision is usually made within 6 months.
£1,839
Adult naturalisation total fee
Permanent
Citizenship status
6 months
Usual decision timeframe
What is British Citizenship?
British citizenship is the principal form of British nationality. A person may already be British automatically, or may need to apply through naturalisation or registration under the British Nationality Act 1981.
Naturalisation is generally for adults who have indefinite leave to remain, settled status or another qualifying freedom from immigration time restrictions. Registration applies in specified statutory categories, including many applications for children and certain adults with particular historical or family connections.
For standard adult naturalisation, the applicant normally needs 5 years’ qualifying residence, or 3 years if married to or in a civil partnership with a British citizen. The applicant must usually meet lawful-residence, absence, good-character, language and Life in the UK requirements.
Naturalisation is discretionary rather than automatic. A successful adult applicant normally becomes British at the citizenship ceremony.
British Citizenship Eligibility
The correct route depends on age, nationality history, residence and family circumstances.
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Correct Citizenship Route
Confirm whether the person is already British, should register, or should naturalise. Using the wrong route can cause delay, invalidity or unnecessary cost.
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Residence and Immigration Status
A naturalisation applicant normally needs the required residence period and freedom from immigration time restrictions. Most non-spouse applicants must have held settled status or ILR for at least 12 months.
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Knowledge and Good Character
Applicants normally need to meet the language and Life in the UK requirements and satisfy the good-character test. Two suitable referees and biometric enrolment are also required.
What You Can and Cannot Do
What citizenship provides — and what the application does not do
✓ You Can
- Apply by naturalisation if you meet the adult statutory requirements.
- Apply by registration where a specific statutory route applies.
- Hold dual nationality under UK law, although the other country may not permit it.
- Travel while an application is pending using valid travel documents and immigration status.
- Apply for a British passport after citizenship is completed.
- Participate fully in civic life, subject to the rules applying to the activity concerned.
✗ You Cannot
- Assume ILR automatically makes you British.
- Use a citizenship application as immigration permission while it is pending.
- Ignore absence or lawful-residence issues.
- Skip the ceremony where attendance is required.
- Travel on a naturalisation certificate instead of a valid passport or right-of-abode document.
- Assume every child must naturalise; children generally register.
Costs & Fees
Current fees as of 2026. Set by the Home Office — subject to change.
Fees set by the Home Office and subject to change. Last reviewed: July 2026.
| Item | Cost (2026) |
|---|---|
| Adult naturalisation total | £1,839 |
| Adult registration total | £1,670 |
| Child registration | £1,000 |
| Life in the UK test | £50 |
| Biometric enrolment | No fee |
| Priority service | Additional fee — check current fees |
How to Apply for British Citizenship
A five-step route from eligibility review to citizenship ceremony.
Identify the Correct Route
Check whether the applicant is already British, eligible to register, or eligible to naturalise.
Audit Eligibility
Review residence, absences, immigration status, good character, knowledge requirements and discretionary issues.
Prepare and Submit
Complete the correct form, provide two referees, upload evidence and pay the required fee.
Enrol Biometrics and Respond
Complete biometric enrolment and answer any Home Office requests for further evidence.
Receive Your Decision
A standard naturalisation application is usually decided within 6 months; successful adults must then attend a citizenship ceremony.
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Sources
Legal information on this page is based on guidance from GOV.UK, the UK Home Office / UK Visas and Immigration, legislation.gov.uk, and Free Movement. Rules change frequently — speak to our team to confirm current requirements.
Frequently Asked Questions
Common questions about naturalisation, registration, residence and fees.
What is British citizenship UK?
British citizenship is a nationality status that generally carries the right of abode in the UK. It may arise automatically or be obtained through registration or naturalisation.
Is British citizenship the same as indefinite leave to remain?
No. ILR is an immigration status, while British citizenship is nationality.
How much does British citizenship cost in 2026?
The total adult naturalisation fee is £1,839. Adult registration is £1,670 and child registration is £1,000.
How long does a British citizenship application take?
The Home Office aims to decide naturalisation applications within 6 months, although some cases take longer.
Do I need ILR for 12 months before applying?
Most applicants who are not married to or in a civil partnership with a British citizen must have been free from immigration time restrictions for at least 12 months.
What residence period applies to naturalisation?
The standard qualifying period is 5 years. It is normally 3 years for the spouse or civil partner of a British citizen.
What tests are required for British citizenship?
Most adult applicants must pass the Life in the UK test and show sufficient knowledge of English, Welsh or Scottish Gaelic, unless exempt.
What does the good-character requirement cover?
The Home Office considers criminality, immigration compliance, deception, financial soundness and other conduct.
Can children apply for British citizenship?
Yes, but children normally apply for registration rather than naturalisation.
When do I become a British citizen?
An adult naturalisation applicant normally becomes British at the citizenship ceremony after taking the oath or affirmation and pledge.
Review Your British Citizenship Route
Our immigration specialists handle everything from sponsor licence checks to visa approval — for employers and applicants alike.