Naturalising as a British citizen is a step taken once, for life. Naturalisation is the discretionary grant of citizenship under sections 6 of the British Nationality Act 1981. The grant is available to a settled adult who meets the residence, good character, English language and Life in the UK requirements. The application fee is non-refundable on refusal. This post provides the top questions on British citizenship by naturalisation for applicants in the UK.
What is British citizenship by naturalisation?
Naturalisation is the formal process by which a person who is not a British citizen acquires full citizenship after a qualifying period of lawful residence in the UK. The principal authority is sections 6 of the British Nationality Act 1981. The Secretary of State holds a discretionary power to grant naturalisation where the statutory requirements are satisfied.
Naturalisation confers full British citizenship, including the right to apply for a British passport and the right to vote in all UK elections. It also confers the right to transmit citizenship to children born outside the UK. The process requires a formal application to the Home Office, a decision by the Secretary of State, and, where the application is granted, attendance at a citizenship ceremony. The applicant takes an oath of allegiance at the ceremony, and the naturalisation certificate, which evidences citizenship status from the date of grant, is issued at or after it.
Who can apply for naturalisation as a British citizen?
Two routes to naturalisation exist under the British Nationality Act 1981. The standard five-year route is under section 6(1). The spouse or civil partner of a British citizen route is under section 6(2).
On the standard route, the applicant must be aged 18 or over and have been lawfully resident in the UK for at least five years before the application date. The applicant must also have held Indefinite Leave to Remain, indefinite leave to enter, or EU Settlement Scheme settled status for at least 12 months before the application date. An intention to continue living in the UK, or to work in Crown service, is also required. The good character, English language and Life in the UK Test requirements must all be met.
On the spouse or civil partner route, the residence requirement is reduced to three years and the 12-month settled status qualifying period does not apply. The applicant must hold ILR or settled status on the date of application. All other requirements, including good character, English language and the Life in the UK Test, apply in the same way. A common misunderstanding is that the spouse route removes the need to hold ILR or settled status altogether. The route removes only the 12-month waiting period after that status is granted.
What is the residence requirement for naturalisation?
The applicant must have been physically present in the UK on the date exactly five years before the Home Office receives the application, known as the qualifying date. This requirement under section 6(1) of the British Nationality Act 1981 is strict. Where the applicant was not present in the UK on that corresponding date, the Home Office retains limited discretion in exceptional circumstances such as medical reasons or travel restrictions.
The five-year period must consist of continuous lawful residence throughout. Time spent in the UK while exempt from immigration control, for example as a diplomat or a member of visiting armed forces, does not count toward the qualifying period. Further detail on the naturalisation route and on ILR and settled status as qualifying preconditions is available on the Whytecroft Ford website.
What are the absence guidelines for naturalisation?
The absence guidelines for naturalisation set out how many days outside the UK are consistent with a qualifying period. Under the five-year standard route, the applicant should not have spent more than 450 days outside the UK across the qualifying period. No more than 90 days should fall in the final 12 months. Under the three-year spouse or civil partner route, the total absence guidance is 270 days, with the same 90-day limit in the final 12 months.
The Home Office retains discretion to approve applications where absences exceed the guidelines in compelling circumstances, such as an unavoidable absence for medical treatment or a government-imposed travel restriction. A common misunderstanding is that exceeding 450 days automatically disqualifies an application. The position is that applications outside the guidelines carry a materially higher risk of refusal. The fee is not returned where the application does not succeed.
The application form requires details of all absences from the UK. An accurate travel record, compiled from passport stamps, boarding passes or email confirmations, must be provided. The Home Office cross-references the information against its own records.
What does the good character requirement involve?
Good character is a statutory requirement for naturalisation under the British Nationality Act 1981. The Home Office assesses it across several distinct areas: criminal history, financial conduct, immigration compliance and honesty in the application. The requirement is not exhaustively defined in statute but is addressed in detail in the caseworker guidance published on GOV.UK.
All convictions, cautions, penalty notices for disorder and civil penalties must be disclosed. Minor driving matters reflected only in fixed penalty points do not automatically result in refusal. Failure to disclose any relevant matter, including one that would not itself cause refusal, may result in refusal on honesty grounds. Immigration compliance throughout the qualifying period is also assessed, including any overstays or breaches of visa conditions.
What is the English language requirement for naturalisation?
The English language requirement is met by demonstrating knowledge of English, Welsh or Scottish Gaelic at B1 CEFR or above in speaking and listening. The requirement must be met before the application is submitted. Fluency in English without formal evidence of the approved kind does not satisfy the requirement.
The requirement can be met in three ways. A national of a majority English-speaking country listed on GOV.UK satisfies the requirement by nationality. An applicant holding a UK degree, or a degree taught in English and confirmed by Ecctis as equivalent to a UK degree, may rely on that qualification. Where neither of those applies, the applicant must pass a Home Office-approved B1 speaking and listening Secure English Language Test at an approved test centre.
Applicants aged 65 or over, or those with a long-term physical or mental condition that prevents compliance, may apply for an exemption.
What is the Life in the UK Test requirement for naturalisation?
The applicant must pass the Life in the UK Test before submitting the naturalisation application. The test assesses knowledge of British history, culture, values and institutions. It is based on the official handbook “Life in the United Kingdom: A Guide for New Residents.” The test consists of 24 multiple-choice questions, requires a score of 75 per cent or more, and must be completed within 45 minutes.
The test is booked and taken at an approved test centre, and the unique reference number issued on passing must be included in the naturalisation application. The applicant must have passed the test personally. Applicants aged 65 or over, or those with a long-term physical or mental condition, may be exempt. The Life in the UK Test guide covers preparation and booking in full.
What does naturalisation cost?
The naturalisation application fee is non-refundable if the application is refused or withdrawn. Only the ceremony element of the fee may be refunded where the application does not proceed to the ceremony stage. As of June 2026, the current fee, including the ceremony element, is published on the British citizenship application cost guide.
The application fee is the principal cost but not the only one. The Life in the UK Test carries a booking fee per sitting, and an approved Secure English Language Test carries a further charge that varies by provider. Applicants relying on an Ecctis academic qualification assessment pay a separate Ecctis fee. Biometric enrolment at a UK Visa and Citizenship Application Services centre carries no additional fee.
How does the naturalisation application process work?
The naturalisation application is submitted online through the GOV.UK application service, using form AN. All required supporting documents must be prepared before beginning the online application. After submission, the Home Office contacts the applicant to arrange a biometric enrolment appointment, at which fingerprints and a photograph are taken at a UKVCAS centre.
Once the application is decided, the applicant receives either a grant letter or a refusal letter setting out the reasons for refusal. Where the application is granted, the applicant is invited to attend a citizenship ceremony, which must take place within three months of the invitation. The naturalisation certificate is issued at or after the ceremony. The British citizenship processing time guide covers the expected timeline in full.
The applicant may travel outside the UK while a naturalisation application is pending. The applicant must remain contactable by the Home Office and available for the biometric enrolment appointment. Where the application is approved, the applicant must attend the ceremony within the three-month window.
What happens after the citizenship ceremony?
The citizenship ceremony is the final formal step in the naturalisation process. The applicant takes an oath of allegiance, and the naturalisation certificate is issued at or after the ceremony. That certificate is the document required to apply for a British passport.
A British passport application may be submitted as soon as the naturalisation certificate has been issued. The passport application is a separate process, submitted to HM Passport Office rather than the Home Office, with no waiting period between the certificate and the passport application. Further detail on the British citizenship routes and the next steps after naturalisation is available on the Whytecroft Ford website.
More Frequently asked questions
Free from immigration time restrictions means that the applicant’s leave to remain has no expiry date. This status is held by those with Indefinite Leave to Remain, indefinite leave to enter, or EU Settlement Scheme settled status. On the standard route, the applicant must have held settled status for at least 12 months before the application date. On the spouse or civil partner route, the applicant must hold it on the date of application, with no 12-month wait required.
Absences exceeding 90 days in the final 12 months of the qualifying period place the application outside the absence guidelines. The Home Office retains discretion to approve such applications in compelling circumstances, but the risk of refusal is materially higher. Where absences are above the guidelines, a professional eligibility assessment before incurring the non-refundable fee is advisable.
A criminal record does not automatically disqualify an application. The nature, recency and pattern of any convictions, cautions or penalties are assessed under the good character requirement. All matters must be disclosed. Failure to disclose any matter, even one that would not itself cause refusal, may result in refusal on honesty grounds.
Travel outside the UK during a pending naturalisation application is permitted. The applicant must remain contactable by the Home Office and available for any biometric enrolment appointment. Where the application is approved while the applicant is abroad, the applicant must return to attend the citizenship ceremony within the three-month window.
On the standard route, the applicant must have been lawfully resident for five years and must have held ILR or settled status for at least 12 months. On the spouse or civil partner route, the residence requirement is three years and there is no 12-month wait after ILR is granted. Both routes require the applicant to hold ILR or settled status on the application date. All other requirements, including good character, English language and the Life in the UK Test, apply equally.
A refusal letter sets out the specific reasons for the decision, and the naturalisation fee is not refunded. The appropriate timing for a further application depends on whether the grounds for refusal can be addressed. Where the grounds relate to the residence or absence position, the applicant may need to wait before reapplying.
How Whytecroft Ford can help
The Whytecroft Ford immigration team, IAA Accredited, covering nationality, carries out pre-application eligibility assessments, absence calculations, good character reviews and full application preparation for naturalisation applicants. The firm advises at the ILR-to-citizenship stage across the British citizenship routes, including those on the naturalisation and citizenship by marriage routes. The firm also advises those whose travel histories require detailed absence analysis before the application date is set.
To discuss your naturalisation application with our immigration team, call 0208 757 5751 or use the contact form.
Sources
- Apply for citizenship if you have indefinite leave to remain or settled status – GOV.UK
- Apply for citizenship if your spouse is a British citizen – GOV.UK
- British citizenship – GOV.UK
Written and reviewed by the Whytecroft Ford immigration team. IAA Accredited. All guidance is researched against primary sources, including the Immigration Rules, Home Office caseworker guidance and GOV.UK. Reviewed every six months, or sooner following a rule change. Last reviewed: 9 June 2026.
