British Citizenship: How Naturalisation Works in 2026

You've built a life in the UK, you hold settled status or indefinite leave to remain, and you're wondering whether it's time to make it official. British citizenship through naturalisation gives you a British passport, full voting rights and freedom from immigration conditions. It's also expensive and unforgiving of mistakes, so it pays to check everything before you apply.

This guide sets out the rules as of September 2026, based on GOV.UK. Always confirm fees and requirements on the official pages before you pay.

Who is eligible for British citizenship by naturalisation?

On the standard route, you usually need to:

• be 18 or over
• have lived in the UK for at least five years
• have held ILR, settled status or indefinite leave to enter for 12 months
• meet the knowledge of English and Life in the UK requirements
• meet the good character requirement
• intend to keep living in the UK

The 12-month rule catches many people out. Guide AN, the Home Office naturalisation booklet, notes that this can mean waiting until you've been in the UK for around six years in total.

The spouse exception

If you're married to or in a civil partnership with a British citizen, the rules are different. You need three years' residence instead of five, and you don't have to wait 12 months after getting ILR. You must still have ILR or settled status on the day you apply.

Residence and absence rules

You must have been physically in the UK on the date exactly five years (or three, for spouses) before the Home Office receives your application.

As of September 2026, the absence limits are:

The Home Office has some discretion over excess absences, especially with a good reason, but don't count on it. Explain any excess fully in your application.

The Life in the UK test and English requirement

Life in the UK test: fee, format and pass mark

As of September 2026, the test costs £50. You get 45 minutes to answer 24 questions based on the official Life in the UK handbook, and you need 75% or more to pass, which is 18 correct answers.

Book online at least 3 days in advance through the link on GOV.UK. You can retake it as many times as you need, but you pay each time. When you pass, you get a unique reference number to use in your application.

People under 18, aged 65 or over, or with a long-term physical or mental condition (with evidence) are exempt.

The English language requirement

You must show English (or Welsh or Scottish Gaelic) at B1 level or higher on the CEFR scale. You can use an approved English qualification or a degree taught or researched in English.

You're exempt if you're 65 or over, have a qualifying long-term condition, or are a national of certain majority English-speaking countries, such as the USA, Canada, Australia or New Zealand. If you were exempt when you got ILR, you may still need to prove English again for citizenship, so check the exemptions page on GOV.UK.

Good character, including the 2025 illegal entry guidance

The Home Office looks at criminal records, immigration history, finances and honesty. Its guidance (version 7.0, published 30 April 2026) says breaches of immigration requirements within 10 years of the decision will normally lead to refusal.

Since 10 February 2025, applications will normally be refused if you entered the UK illegally, no matter how much time has passed. The same applies if you arrived without required entry clearance or an ETA after a dangerous journey, such as by small boat or hidden in a vehicle. The Home Office says it will consider whether the entry was outside your control, for example if you were a child or trafficked.

Debt alone won't normally lead to refusal if you're repaying it as agreed. Lying or hiding information will.

If your history includes any of these issues, get advice from an IAA-regulated immigration adviser or a solicitor before you apply. GOV.UK tells applicants to check that any representative is registered with the Immigration Advice Authority or a legal professional body.

British citizenship costs and how to apply

What it costs

Fees aren't normally fully refunded if you're refused, so a failed application can cost you most of the money.

How to apply, step by step

1. Check your dates: five (or three) years' residence, absences and, if needed, 12 months since ILR.
2. Pass the Life in the UK test and keep your reference number.
3. Get your English evidence unless you're exempt.
4. Choose two referees. Guide AN says each must have known you for at least 3 years, and one must hold a British passport.
5. Apply online and pay £1,839.
6. Enrol your biometrics at a UKVCAS service point. Guide AN says this is usually required within 45 days of applying.
7. Wait for a decision, usually within 6 months.
8. Attend your ceremony within 3 months of your invitation.

An example timeline

Say you're a nurse from Kerala who arrived on a work visa in March 2020 and got ILR in March 2025. You're not married to a British citizen, so the 12-month rule applies, and March 2026 is the earliest you could apply.

Before that, you'd check you hadn't spent more than 450 days abroad since March 2021, or more than 90 days in the final year. You'd also check whether your English exemption at settlement still works for citizenship. If a long family visit to India pushed you over, you might wait a few months to bring your final-year absences under 90 days.

The ceremony, your first passport and dual nationality

You become British at the citizenship ceremony, where you make an oath or affirmation and a pledge, then receive your certificate. You can usually bring 2 guests.

You can't travel into the UK on your citizenship certificate. You'll need a British passport or a certificate of entitlement. If you still have a biometric residence permit, GOV.UK says you must return it within 5 working days of getting your certificate, or you could face a penalty of up to £1,000.

The UK allows dual citizenship, but your other country may not. Check with its embassy or consulate first. You may lose that nationality automatically.

Are the citizenship rules changing?

The government's earned settlement consultation closed on 12 February 2026. It proposed moving the normal path to ILR from 5 years to 10. As of September 2026, GOV.UK says the responses are still being analysed.

Because ILR normally comes before naturalisation, the proposal could lengthen the overall journey to citizenship for future migrants. However, we found no change to the naturalisation residence or absence requirements in force on GOV.UK as of September 2026. If you're still on a work visa, our Skilled Worker visa guide explains where settlement currently stands.

Common mistakes to avoid

• Applying too early, before 12 months with ILR or before exactly five years' residence.
• Miscounting absences, especially in the final 12 months.
• Assuming an English exemption carries over from your ILR application.
• Leaving out old cautions, fines or immigration issues.
• Booking the Life in the UK test through a copycat site. Use the link on GOV.UK.
• Booking travel straight after your ceremony before your passport arrives.

Your next steps

Work out your earliest eligible date from your ILR date and a full list of trips abroad. Book the Life in the UK test, sort out your English evidence and line up two referees.

Put aside the £1,839 fee plus the test and passport costs. If there's anything unusual in your history, a short consultation with an IAA-regulated adviser or solicitor could protect a large, largely non-refundable fee. And watch out for anyone promising "guaranteed" citizenship. Our guide to spotting immigration scams explains the warning signs.