Not every child born in the UK is automatically British — but many can become British citizens by registration using form MN1. This 2026 guide explains the main routes (including the 10-year rule for UK-born children), the fee, biometrics, and how registration differs from naturalisation.
Main ways a child can register
- Born in the UK and lived here 10 years — a child born in the UK who has lived here for the first 10 years of their life can register, regardless of their parents’ immigration status (absences are expected to be limited, broadly up to 90 days a year, with discretion).
- A parent becomes British or settled — a child born in the UK whose parent later gets British citizenship or indefinite leave to remain can usually register.
- Discretionary registration — the Home Office can register a child where their future clearly lies in the UK (for example both parents are British or settled).
Cost and process
The registration fee is currently around £1,214 per child (a fee waiver may be available in some cases). If the child turns 18 during the process, a £130 citizenship ceremony fee applies and they must take the oath. You apply on form MN1 and provide supporting documents.
Biometrics
Every child attends a UKVCAS appointment for a digital photo; children aged 5 and over also give fingerprints.
Registration vs naturalisation
Children under 18 register (MN1); adults naturalise (see our naturalisation guide). Once registered, a child can get a British passport, and the UK allows dual citizenship.
Frequently asked questions
How do I register my child as a British citizen?
Apply on form MN1 if the child qualifies — for example born in the UK and resident for 10 years, or a parent has become British or settled.
Can a child born in the UK become British?
Yes — if they’ve lived in the UK for the first 10 years of their life they can register, or if a parent later becomes British or settled.
How much does it cost to register a child?
Around £1,214 per child (a fee waiver may apply), plus a £130 ceremony fee if the child turns 18 during the process.
Does my child need a biometric appointment?
Yes — a digital photo for all children, and fingerprints for those aged 5 and over.
What is the 10-year rule?
A child born in the UK who has lived here for their first 10 years can register regardless of their parents’ immigration status, subject to limited absences.
Is registration the same as naturalisation?
No — children under 18 register (MN1); adults naturalise.
