UK Naturalisation and the Life in the UK test in 2026.

British citizenship by naturalisation is the final step for foreign nationals who have lived in the UK and wish to become full citizens. The process requires you to meet residence, language, and good character requirements, pass the Life in the UK test, and pay the application fee. The decision is made at the Home Secretary's discretion, meaning that meeting the minimum requirements does not guarantee approval — character and other factors are weighed independently.

The Life in the UK test is a computer-based exam that assesses your knowledge of British traditions, customs, history, government, and everyday life. It is a mandatory step for all citizenship applications, as well as for those applying for ILR. The test must be passed before submitting the citizenship application.

This guide covers the naturalisation requirements, the Life in the UK test structure and preparation, the English language evidence, the good character assessment, and the step-by-step application process.

Foreign nationals who hold indefinite leave to remain (ILR) or settled status and are considering applying for British citizenship. This includes:

• Non-EEA nationals who have completed the five-year ILR route and now want citizenship
• Spouses of British citizens on the three-year route to citizenship
• Commonwealth citizens who hold ILR and meet the residence requirements
• Individuals with EUSS settled status who are eligible for naturalisation
• Anyone who needs to pass the Life in the UK test as part of their ILR or citizenship application

Children born in the UK to non-British parents have a separate registration process, not the naturalisation route described here.

The naturalisation application (form AN) requires extensive supporting documentation:

• Valid passport — current and valid at the date of application
• Life in the UK test pass certificate — the original or a certified copy
• English language evidence — B1 SELT certificate, degree taught in English, or proof of nationality from a majority-English-speaking country
• Proof of ILR — BRP card with ILR endorsement, or eVisa share code showing settled status
• Two referee declarations — one professional referee and one British citizen referee, each completing a standard referee form
• Absence schedule — listing all trips outside the UK during the qualifying period with dates and total days absent
• Proof of residence — P60s, employment letters, tenancy agreements, utility bills, council tax statements covering the qualifying period
• Two passport-size photographs — one endorsed by one of the referees

The naturalisation application can be submitted as soon as you hold ILR and meet the residence requirements. For those married to a British citizen, the residence requirement is three years with no more than 270 days absent (and no more than 90 days absent in the final 12 months). For others, the requirement is five years with no more than 450 days absent (and no more than 90 days in the final year).

The Life in the UK test should be taken well before the citizenship application. Book the test online through the official GOV.UK booking service. Tests are available at over 30 test centres across the UK. Results are emailed within 24 hours and the certificate is posted within seven working days.

Once the application is submitted, processing currently takes two to six months. Plan the application to avoid travel during this period, as you may need to attend an interview or provide additional information.

The good character assessment is the most subjective part of the naturalisation process. Be completely honest on the AN form — UKVI cross-references criminal records, HMRC data, and immigration history. A minor criminal record declared voluntarily is treated more favourably than the same record discovered through a check.

Prepare a clear absence schedule early and check it against the 90-day final-year limit. Even short trips add up. If the final 12 months show 85 days absent, a week-long holiday could push you over the limit.

For the Life in the UK test, use the official handbook (the 2025 or 2026 edition) and take online practice tests. The test questions are drawn from the handbook, not from general knowledge. Study the section on British government and law carefully — those questions have the highest failure rate.

Not passing the Life in the UK test before applying. The test must be passed before the citizenship application is submitted. Applying without a test reference number leads to immediate rejection.

Criminal convictions not declared. UKVI checks the Police National Computer. An undeclared conviction is treated as deception and leads to a mandatory refusal regardless of the seriousness of the underlying offence.

Exceeding the absence limits. The 90-day final-year limit is strictly applied. There is no discretion for overshooting this limit. If you plan any significant travel, schedule the trip after the naturalisation application is submitted.

Invalid referees. A referee who is related to you, your solicitor, or a Home Office employee is invalid. Ensure both referees meet the statutory requirements before they complete the reference form.

Insufficient English evidence. A SELT certificate that has expired for immigration purposes may still be valid for naturalisation, but check the Home Office guidance. If in doubt, retake the test with a current approved provider.