Naturalisation eligibility — the requirements
To naturalise as a British citizen you normally need to meet all of the following. The rules are detailed and the absence limits in particular catch a lot of people out, so it is worth checking each point carefully before you apply.
- Be 18 or over and of sound mind
- Hold ILR or settled status — and, in most cases, have held it for at least 12 months before you apply (this 12-month wait does not apply if you are married to a British citizen)
- Have lived in the UK lawfully for the qualifying period — normally 5 years, or 3 years if you are married to or in a civil partnership with a British citizen
- Meet the continuous residence and absence rules — generally no more than 450 days outside the UK in the 5 years before applying, and no more than 90 days outside the UK in the final 12 months
- Pass the Life in the UK Test — a computer-based test on British history, culture and values
- Meet the English language requirement, normally to level B1 (speaking and listening), unless you are exempt, for example by age or a relevant degree taught in English
- Be of good character — the Home Office reviews your immigration history, criminal record, finances and tax affairs
- Intend to continue living in the UK
The application process — from online form to ceremony
Most people apply online through the official GOV.UK service. You complete the form, pay the Home Office fee (check GOV.UK for the current fee, as it changes) and upload your supporting documents.
You will then attend an appointment at a UK Visa and Citizenship Application Services (UKVCAS) point to give your biometric information — your fingerprints and a photograph.
Your application must be supported by two referees who confirm they know you. They must meet the Home Office's rules: usually one must be a professional person, and one a British citizen aged 25 or over.
Once your application is approved, you are invited to a citizenship ceremony. There you make an oath of allegiance (or affirmation) and a pledge to the UK, and you receive your certificate of naturalisation. Only then are you legally a British citizen — and able to apply for a British passport.
- Apply online and pay the Home Office fee (check GOV.UK for the current fee)
- Attend a UKVCAS appointment to give biometrics
- Provide two qualifying referees
- Wait for a decision — the Home Office aims to decide most applications within around six months
- Attend your citizenship ceremony to take the oath and pledge
Dual nationality — keeping your existing citizenship
The UK allows dual (and multiple) nationality. In most cases you can become a British citizen without giving up the citizenship you already hold.
However, some other countries do not permit dual nationality and may withdraw your original citizenship when you naturalise as British. The UK will not stop you — but it is worth checking the rules of your home country before you apply, so there are no surprises.
How Immigration Lawyers UK helps
Immigration Lawyers UK is a network of SRA-regulated immigration solicitors working on fixed fees across the UK, including London, Manchester and Birmingham. A naturalisation refusal can be costly — the Home Office fee is not usually refunded — so getting the application right first time matters.
Our solicitors review your residence history and absences against the rules, check your good-character position, make sure your documents and referees meet the requirements, and complete the form with you. We are especially careful with the issues that most often lead to refusal.
- A clear fixed fee agreed before any work begins — no hourly surprises
- A full review of your eligibility, absences and continuous residence
- Help with good-character concerns, such as past cautions, tax matters or immigration history
- Document and referee checks to reduce the risk of a refusal
- Straightforward, plain-English advice from an SRA-regulated solicitor
What to do next
If you are ready to find out whether you qualify for naturalisation, start with a free, no-obligation assessment of your situation.
Request a free call-back and one of our SRA-regulated solicitors will talk through your residence, your status and your timing, and explain your options and the likely fixed fee — with no pressure to proceed.
Frequently asked questions
How long do I need to have lived in the UK to apply?
Normally you need 5 years of lawful residence in the UK before applying for naturalisation. If you are married to or in a civil partnership with a British citizen, this is reduced to 3 years. You also need to watch the absence limits — generally no more than 450 days outside the UK across the qualifying period and no more than 90 days in the final 12 months.
What is the Life in the UK Test?
The Life in the UK Test is a computer-based test of 24 questions on British history, traditions, values and everyday life. You normally need to pass it to naturalise, unless you are exempt (for example, if you are under 18 or over 65). You book and sit it at an approved test centre, and you keep the pass certificate for your application.
Can I keep my existing citizenship (dual nationality)?
The UK allows dual nationality, so in most cases you can become British without giving up your current citizenship. Some other countries, however, do not permit it and may withdraw your original nationality when you naturalise. It is best to check your home country's rules before you apply.
Do I need ILR before I can apply for citizenship?
In most cases, yes. You normally need indefinite leave to remain (ILR) or EU Settlement Scheme settled status, and you usually need to have held it for at least 12 months before applying. The 12-month wait does not apply if you are married to a British citizen, though you still need to meet the residence requirement.
How long does a citizenship application take?
The Home Office aims to decide most naturalisation applications within around six months, though some take longer if further checks are needed. After approval you attend a citizenship ceremony, usually within a few months, where you take the oath and pledge and receive your certificate.