Registering a Child as British With Form MN1: Apply Alongside a Parent, or Wait Until They Naturalise?
You can apply to register a child as British using Form MN1 at the same time as a parent's naturalisation or registration — you do not have to wait until the parent has become British first. The Home Office calls this a "family application," and it considers the child's case under section 3(1) of the British Nationality Act 1981, exercising discretion based on the parents' status, the child's residence, and good character.
So there is no single right answer to "apply together or wait." Both routes are valid. Which is better depends on cost, timing, and how confident you are in the parent's own application.
- Form MN1 registers a child under 18 as a British citizen.
- It is a discretionary route under section 3(1) BNA 1981 — never automatic.
- The fee is £1,214 per child (a fee waiver may be available if you cannot afford it).
- A child can be included at the same time as a parent's naturalisation.
- The Home Office "normally" registers where one parent is British or about to become British and the other is British or settled.
What the rules actually say
Unlike a child born in the UK who gains an automatic entitlement once a parent settles or naturalises, registration under section 3(1) is at the Home Secretary's discretion. Caseworker guidance says officials "must normally register" a child where:
- one parent is a British citizen or about to become one through registration or naturalisation
- the other parent (if part of the child's life) is British or settled in the UK
- the child has lived in the UK for the last 2 years and is settled here
- both parents consent (or any objection is ill-founded)
- there is no good-character reason to refuse
The phrase "about to become one" is the key. It is precisely why a child can be registered in line with a parent who is naturalising at the same moment. You are not blocked from applying simply because the parent is not yet British on paper.
Applying at the same time
The attraction of applying together is timing: parent and child can reach citizenship — and, ideally, attend the citizenship ceremony — close together. Practically, the parent submits their naturalisation application (Form AN) and a separate MN1 is submitted for the child. The child's MN1 is decided on the basis that the parent is in the process of becoming British.
A child's MN1 is still discretionary. If the parent's own application is later refused — for example on residence or good-character grounds — the basis for the child's "family application" can fall away. The £1,214 child fee is not automatically refunded if the application is refused.
Why some families choose to wait
Waiting until the parent has actually been granted British citizenship removes the uncertainty. Once the parent is a confirmed British citizen, the child's MN1 sits squarely within the "normally register" criteria, which can make the discretionary decision more straightforward. The trade-off is time: you pay the same fee, but the child's citizenship arrives later.
Waiting can make particular sense if the parent's naturalisation is borderline — for instance, tight on the residence or absences rules, or where good character is a live question. If you are unsure how solid the parent's case is, that is exactly the kind of situation where a regulated adviser can help you sequence the applications.
Cost and the fee waiver
The registration fee is £1,214 for each child, whether you apply alongside the parent or afterwards. Applying together does not reduce the per-child cost. If the family genuinely cannot afford the fee, a fee waiver may be available for under-18s — you must credibly show you cannot afford it. There is no saving from "bundling," so cost alone rarely decides the timing question.
So which is right?
If the parent's naturalisation looks strong and you want everyone's status settled together, applying at the same time is well supported by the guidance. If the parent's case carries any real risk, waiting protects the child's fee and rests their application on confirmed citizenship. Either way, the decision is discretionary and fact-specific.
Because this is a discretionary, legally sensitive choice — and because a parent's refusal can knock through to the child — anyone with a borderline case should get advice from a regulated OISC adviser or immigration solicitor before deciding how to sequence the applications.
If the parent still needs to pass the Life in the UK test for their own naturalisation, our free Life in the UK practice is a good place to start, and our British citizenship timeline shows how the steps fit together. For documents, see what documents you need to apply for British citizenship.