Don't apply to register your child as British before you're British yourself
If your child's right to register as British depends on you becoming British or settled, do not apply until that has actually happened. The qualifying event — you becoming a British citizen, or you obtaining settled status — must already be in place at the date you apply for your child. Apply too early and the Home Office can refuse the application, and the fee is not refunded.
This is one of the most expensive avoidable mistakes in child citizenship. Consider a parent who applied in January to register their children (born abroad, each holding settled status for 12 months) and then naturalised themselves in February. Both child applications were refused — because the parent was not yet British when the applications were made.
- A child born abroad relies on the parent's status at the date of application, not later.
- Section 1(3) BNA 1981 (parent becomes settled or British) applies only to children born in the UK.
- Children born outside the UK use the discretionary route under section 3(1), via form MN1.
- The under-18 registration fee is £1,214 and is not refunded if the application is refused.
- Your naturalisation completes only after your citizenship ceremony — not when your application is approved.
Why the timing rule exists
British nationality law treats children differently depending on where they were born. Under section 1(3) of the British Nationality Act 1981, a child born in the UK has an entitlement to be registered if, while still under 18, one of their parents becomes settled or becomes a British citizen. That is a generous route, but it is tied to UK birth.
A child born outside the UK to parents who were not British at the time of the birth cannot use section 1(3). Instead, registration is discretionary under section 3(1), and the Home Office looks at the family's circumstances at the point of decision. Its policy guidance says it would normally expect at least one parent to be a British citizen, with the other (if involved in the child's life) settled in the UK. If that picture is not yet true when you apply, the caseworker has little to grant on.
The mistake: applying before the qualifying event
The trap is assuming that an application "in progress" counts. It does not. Becoming British is not finished when your naturalisation is approved — it is finished when you attend your citizenship ceremony and receive your certificate. A child's MN1 submitted before that moment is built on a status the parent does not yet hold.
The same logic applies to settled status. If your child's route depends on you holding indefinite leave to remain, that ILR must be granted before the child's application goes in — not pending, not expected next month.
The fee for registering a child under 18 is currently £1,214, and GOV.UK is explicit that it is not refunded if the application is refused. A partial refund (less a £30 administration charge) usually applies only where an application is rejected as invalid before it is considered — not where it is considered and refused. Submitting early can cost the full fee per child with nothing to show for it.
What to do instead
The safe sequence is almost always: secure your own status first, confirm it is complete, then apply for your child.
- If your route is naturalisation: wait until after your ceremony and you hold your certificate before submitting the child's MN1.
- If your route is settlement: wait until ILR is actually granted.
- Check the child's own conditions too: the child usually needs to meet residence and good-character expectations in their own right, so confirm those before you pay.
If you are weighing up whether to lodge the child's application alongside your own or hold off, our note on registering a child alongside a parent or waiting until naturalised walks through the trade-offs. And if your child was born in the UK, the rules are different — see registering a UK-born child once one parent gets ILR.
A note on what this is — and isn't
This is general information drawn from GOV.UK and the British Nationality Act 1981, not legal advice. Nationality decisions turn on individual facts, and discretionary applications in particular can be finely balanced. If your situation is complex, consider a regulated immigration adviser before you pay.
While you prepare your own naturalisation, the Life in the UK test is one box you can tick early and with confidence — and that is exactly what BritPass is built to help you do.