If you are a Thai national living in the UK, obtaining indefinite leave to remain is often followed by a question: when can you apply for British citizenship? The answer depends on whether you are married to a British citizen, how long you have lived in the UK and whether you meet the residence and other naturalisation requirements.
ILR does not make you British automatically. You must make a separate citizenship application. Once naturalisation is approved and the required citizenship ceremony is completed, you can apply for a British passport.
Which naturalisation route applies?
Married to a British citizen
You generally need at least three years’ residence in the UK and ILR, indefinite leave to enter or settled status. There is normally no additional 12-month wait after obtaining that status, provided you meet all the other requirements.
Other adult applicants
The usual route requires five years’ residence and normally 12 months with ILR, indefinite leave to enter or settled status, alongside the other requirements.
What else must you show?
- You are at least 18 when applying.
- You meet the relevant UK residence period and were physically present in the UK at the start of that period.
- Your absences from the UK are within the usual limits, or you have grounds for the Home Office to exercise discretion.
- You meet the language requirement, unless an exemption applies.
- You have passed the Life in the UK Test, unless an exemption applies.
- You meet the good character requirement and provide accurate information about your immigration and personal history.
How many days can you spend outside the UK?
For the spouse route, the usual limits are 270 days outside the UK during the three-year qualifying period and 90 days during the final 12 months. For the five-year route, they are usually 450 days over five years and 90 days in the final 12 months. Discretion may be possible in some cases, but it should be assessed before you apply.
Why does the exact application date matter?
The Home Office normally requires you to have been physically in the UK exactly three or five years before it receives your application, depending on your route. Someone can meet the overall residence and absence limits but still choose a date on which they fail this particular test. Check your travel history before submitting the online form.
Is there a financial requirement?
Naturalisation does not have the spouse visa’s minimum income requirement. However, financial conduct may be relevant to the good character assessment in some circumstances. The old version of this article incorrectly presented a general ability-to-support-yourself test as a standard citizenship requirement.
What happens after you apply?
You normally submit the application online, provide supporting documents and attend an identity appointment. If it is approved, adults usually attend a citizenship ceremony. A British passport is a separate application after citizenship has been obtained.
How Thai Visa Express UK can help
Our UK office can assess the correct naturalisation route, calculate residence and absences, review ILR or settled status, and help prepare the application and supporting evidence. UK immigration and nationality advice is provided through Thai Visa Express UK, regulated by the Immigration Advice Authority, registration F200700163.
Have ILR and considering citizenship?
Tell us when you received ILR or settled status, whether your spouse is British and roughly how much time you have spent outside the UK. We can help check when you may be ready to apply.
This is general information. Citizenship eligibility depends on the applicant’s full history and the rules in force when applying. The Home Office makes all citizenship decisions.