Dependant status after child turns 18

What “dependant” means here matters

Your question depends heavily on the context in which you are asking, because “dependant” has different meanings in different areas of law in England and Wales. The most common contexts are immigration (a child on a visa as a dependant of a parent), welfare benefits such as Child Benefit, and eligibility for things like NHS charges or a parent’s healthcare cover. The rules differ significantly, so I have set out the main possibilities below. If you tell me which situation you mean, I can give you a more targeted answer.

Immigration: child dependant on a parent’s visa

If you are asking about immigration, the short answer is that a child can remain as a dependant beyond their 18th birthday, but only in limited circumstances and generally only if their dependant status was already established before they turned 18.

The key principles under the current Home Office rules are as follows.

A child normally joins or extends as a dependant while under 18. Once they are over 18, they cannot usually be added as a new dependant for the first time. For most work routes, such as the Skilled Worker route, a child over 18 can stay as a dependant only if they already have permission to be in the UK as the dependant of that parent. In other words, they must already hold dependant leave; they cannot switch into dependant status as a fresh applicant once they are an adult.

For an adult child extending or applying for indefinite leave to remain as a dependant, the Home Office typically requires them to show that they had an eligible dependant visa granted before they turned 18, that they are living with the parent or parents, that they are not leading an independent life, that they are not married or in a civil partnership, that they have no children of their own living with them, and that they can be supported and accommodated without recourse to public funds. The “not leading an independent life” requirement is important and is assessed on the facts, looking at matters such as whether the adult child lives with the parents, is financially dependent on them, and has not formed a separate household.

So the practical position is that continuity is everything. A child who has held dependant leave since before 18 can generally continue to extend and eventually settle as a dependant, provided the ongoing requirements are met. A young adult who never held dependant status, or whose status lapsed, will usually not be able to become a dependant after 18 and would normally need to qualify under a different route, such as a study route or a work route in their own right.

Adult dependent relative route

There is a separate and much narrower category for adults who need long-term personal care. The Adult Dependent Relative route is very demanding and is not aimed at healthy young adults simply wanting to stay with their parents. It requires proof that, as a result of age, illness or disability, the person requires long-term personal care to perform everyday tasks, and that this care is not available or affordable in the country where they live. This route is rarely relevant to a child simply turning 18 and is generally not a substitute for continuing dependant leave.

Child Benefit and welfare context

If you are asking about Child Benefit rather than immigration, the position is different again. Child Benefit can continue after a child turns 16 and up to the age of 20 if the young person stays in approved full-time non-advanced education, such as A levels or certain vocational courses, or on an approved unpaid training course. It stops if the young person starts advanced education such as a university degree, starts paid work of 24 hours or more a week where they are financially self-supporting, or claims certain benefits in their own right. You have to tell HMRC that your child is staying in approved education or training for payments to continue, otherwise they usually stop from around the 31 August after the 16th birthday.

Key facts that would change the answer

To advise you properly I would need to know which of these situations applies, and in particular:

1. Whether this is an immigration question, a benefits question, or something else such as NHS eligibility or a private policy.

2. If immigration, what visa route the parent holds, whether the child already has dependant leave granted before turning 18, and whether the child lives with you, is unmarried, has no children, and is financially dependent.

3. If benefits, whether the young person is continuing in approved full-time education or training and their exact age.

Practical next steps

If this is about immigration, gather the child’s current visa or biometric residence documents to confirm what status they already hold and when it was first granted, as this is the single most important fact. If the child already holds dependant leave, plan any extension application well before the current permission expires so continuity is not broken. If the child has never held dependant leave, look realistically at alternative routes rather than assuming dependant status can be added after 18.

If this is about Child Benefit, contact HMRC to confirm the young person’s continuing education or training so that payments are not stopped.

If you let me know which context you mean and the key facts above, I can set out the specific rules and the strongest way to approach it.