How to Apply for British Citizenship After ILR (2025 Guide)

Take the final step towards becoming a British citizen

After years of study, work, and dedication, achieving British citizenship is the final milestone in your UK journey. It represents belonging, stability, and the freedom to live in the UK permanently without immigration restrictions.

If you already have Indefinite Leave to Remain (ILR), you may be eligible to apply for citizenship through naturalisation. This guide explains how the process works in 2025, what documents you’ll need, and how to prepare a strong application.

Who this guide is for

This article is for:

• ILR holders preparing to apply for British citizenship
• Skilled Worker or Family Visa holders who have reached permanent residence
• Long-term UK residents planning to naturalise

Whether you arrived as a student, worker, or partner, this guide will help you take the final step toward becoming a UK citizen.

What is British citizenship by naturalisation?

Naturalisation is the legal process that allows ILR holders to become full British citizens. Once granted, you’ll receive a British passport and enjoy the same rights as any other UK national.

As a British citizen, you can:

• Live and work in the UK without restrictions
• Vote in UK elections
• Access public services and benefits (where eligible)
• Travel freely using a British passport

Key eligibility requirements in 2025

Residency and ILR requirement

You can usually apply for British citizenship 12 months after obtaining ILR.

If you are married to or in a civil partnership with a British citizen, you can apply as soon as you receive ILR, without waiting 12 months.

You must also show:

• Five years of lawful residence in the UK before applying (or three years if applying as a spouse of a British citizen)
• No more than 450 days outside the UK during that time (270 days if applying as a spouse)

English language and Life in the UK Test

You’ll need to demonstrate:

• English language proficiency at B1 level or higher
• A valid Life in the UK Test pass certificate

If you already provided these for your ILR application, you usually don’t need to resubmit them.

Good character requirement

Applicants must have a clean criminal and immigration record and must not have breached UK immigration laws in the previous 10 years.

Step-by-step process for applying for British citizenship

Step 1: Check your eligibility

Confirm that you meet the ILR and residency requirements and have valid test certificates.

Step 2: Prepare your documents

You’ll need:

• Passport and Biometric Residence Permit (BRP)
• Proof of ILR status
• Evidence of residency (e.g. P60s, utility bills, council tax)
• Life in the UK Test and English language certificates
• Marriage certificate (if applying as a spouse)

Step 3: Complete the online application

Submit your British citizenship application through the official UK Government website.

Step 4: Pay the fees

• Application fee: £1,580 per person (as of 2025)
• Ceremony fee: Included in most applications

Step 5: Attend your biometric appointment

You may need to provide fingerprints and a photograph at a UKVCAS service centre.

Step 6: Wait for a decision

Most applications are decided within 6 months, though complex cases may take longer.

Step 7: Attend your citizenship ceremony

Once approved, you’ll receive an invitation to attend a citizenship ceremony. You’ll take an oath of allegiance and receive your certificate of British citizenship.

Timeline summary

Common mistakes to avoid

Applying too early

You must wait 12 months after ILR unless applying as a spouse of a British citizen.

Missing travel records

Keep evidence of all absences from the UK over the past 5 years.

Incomplete documents

Always include your ILR proof, BRP, and test certificates.

Ignoring the good character requirement

Even minor breaches of immigration rules can affect approval.

Benefits of becoming a British citizen

• Freedom to live, work, and study in the UK permanently
• The ability to vote in all UK elections
• Access to public benefits (subject to eligibility)
• Travel flexibility with a British passport
• The right to pass on citizenship to children born abroad

How AHJ Immigration helps you apply for citizenship

At AHJ Immigration, we make the naturalisation process clear and manageable. Our consultants help you understand eligibility, gather correct documents, and avoid delays or refusals.

We help you:

• Verify your eligibility and residence history
• Review your documentation
• Prepare and submit your citizenship application
• Provide full support through to your ceremony

📞 Call 0121 828 2224 to discuss your British citizenship application today.

Book your consultation

Free 30-minute consultation

Your free consultation covers an overview of eligibility, residence rules, and the naturalisation process.

Book here:

Or call 0121 828 2224 to book by phone.

Paid 1-hour consultation (£120)

After your free session, you can book a 1-hour consultation where we:

• Review your ILR documents and residence evidence
• Check eligibility for British citizenship
• Provide detailed written advice

The £120 fee is deducted from your final application cost if you continue with us.

FAQs

1. How long after ILR can I apply for British citizenship?
Usually 12 months after receiving ILR, unless you’re married to a British citizen.

2. Can I travel while my application is being processed?
Yes, but ensure your passport and BRP are available if the Home Office requests them.

3. Do I need to attend a ceremony?
Yes. It’s a legal requirement for all successful applicants aged 18 or over.

4. Can my family apply with me?
Yes, but each person must complete a separate application form.

5. What happens after the ceremony?
You’ll receive your citizenship certificate, after which you can apply for a British passport.

Our process

1. Free Consultation – Overview of your situation and eligibility.
2. Paid Consultation – Document review and written advice.
3. Gathering Documents – Templates, checklists, and consultant support.
4. Application Stage – Review and submission of your application.
5. Waiting Phase – Monitoring progress and managing Home Office queries.
6. Decision Phase – Support through approval, ceremony, and next steps.

Disclaimer

Fees and requirements are always subject to change as UK immigration is ever-evolving. The information provided is correct at the time of publishing. We regularly update our guides to reflect the latest Home Office guidance.

Become a British citizen with confidence

Applying for British citizenship is the final step toward complete security and belonging in the UK. With expert support, your transition from ILR to citizenship can be smooth and stress-free.

📞 Call 0121 828 2224 or book your free consultation today.

After your free call, you can book a paid 1-hour consultation (£120) for a full document review and personalised written advice — and we’ll deduct the fee from your final application cost if you continue with us.

Your UK journey doesn’t end with ILR — it begins again with citizenship.