Use this form to apply for British citizenship by naturalisation. You cannot apply online if you live in the Channel Islands, on the Isle of Man or in a British Overseas Territory. You should download and complete the paper form.
In your application, you can also include family members. Each person included in the application will be assessed against the statutory requirements in their own right.
You can also apply on behalf of a child under 18 if they meet the eligibility criteria. Read more about citizenship for children under 18 in Guide MN1.
Before you apply
Before you begin your application, ensure you can provide the following:
- a ‘Life in the UK Test’ certificate: this must be from the official government service for Life in the UK Tests and you will need to provide your pass reference number (If you are applying on behalf of a child under 18, they don’t have to pass the Life in the UK Test)
- two referees
- proof of your knowledge of the English language
If you already have a certificate for knowledge of the English language to at least B1 level, used as part of a successful settlement application, you can use this towards this application.
You also need to provide one of the following:
- evidence of Indefinite Leave to Remain
- a European Economic Area (EEA) Permanent Residence Card
- a certificate of entitlement to the right to abode
For further information on residence requirements, eligibility, referees and the evidence we require, read the guidance notes and requirements booklet.
Find out more about the fees for citizenship applications.
Any reference in this form to EEA nationals includes Swiss nationals.
How long it takes you to complete the application will depend on your situation. You will be able to save your application and come back to it at another time if you need to.
If you are inactive for 25 minutes you will be automatically logged out.
How we use your data
The Home Office will use the personal information you provide to consider your application. We may also share your information with other public and private sector organisations in the UK and overseas. For more detail please see the Privacy Notice for the Border, Immigration and Citizenship system. This also sets out your rights under the Data Protection Act 2018 and explains how you can access your personal information and complain if you have concerns about how we are using it.