How Old Can a Child Be for the Subclass 101 Visa in 2026?
How the Subclass 101 child visa age test works: under 18, 18–24 in full-time study, or 18+ with a disability, at lodgement and at decision.
A child must be under 25 to qualify on the study route for the Child visa (Subclass 101) — but there are three routes in total, and the number that matters most is the child's age on the day the application is lodged. According to the Australian Department of Home Affairs Child visa (subclass 101) page as at August 2026, the child must be either under 18 years old, or over 18 and under 25 years and studying full time, or over 18 years with a disability.
That framing is easy to misread. The 25 is not a single cut-off applied once; it sits inside the "dependent child" test, and some parts of that test are checked twice — when you apply and again when the Department decides. The difference between those two moments is where most near-the-limit cases are won or lost.
What are the three age routes?
| Route | Age test | Conditions that apply alongside it |
|---|---|---|
| Under 18 | Must be under 18 | Sponsorship approved; for a child under 18, either written consent from everyone who can legally decide where the child lives, or the child's home country's laws allow them to leave, or the grant is consistent with an Australian child order; grant must be in the child's best interests |
| 18 to 24 | Over 18 and under 25 | Full-time student at application and at decision; not working full time; financially dependent on the parent more than any other person; never married, engaged or in a de facto relationship |
| 18+ with a disability | The official page states no upper age limit | Must have totally or partially lost their bodily or mental functions; cannot work full time |
The disability route is the only one without a stated ceiling, and it is the only route for applicants aged 18 or over that carries no study requirement — an applicant who cannot work full time because of a disability is not required to be enrolled full time to qualify.
One separate age line catches families out: a stepchild must be aged under 18, and must be the child of the step-parent's former partner. A stepchild who has turned 18 cannot use the 18-to-25 study route at all, regardless of enrolment.
Is the age test applied when I lodge, or when the Department decides?
Both, but they do different work.
At lodgement, the applicant must fall inside one of the three routes above. The Australian Department of Home Affairs page is explicit that an 18-to-24-year-old "must be a full-time student when they apply and when the visa application is decided", and the Migration Regulations 1994 set the 25-year threshold at the point of application (clause 101.211). So an applicant who is already 25 on the day the application is lodged does not qualify on the study route — that is the hard line behind the headline number.
At decision, clause 101.221 of the Migration Regulations 1994 requires an applicant who was 18 or over at application to continue to meet the dependent child definition, or to have stopped meeting it only because they turned 25. In other words, ageing past 25 while the application is being processed is not, by itself, a refusal ground. Stopping full-time study, taking up full-time work, or marrying during that same period is — because those changes are not explained by the birthday.
For an applicant who was under 18 at lodgement, the decision-time rule is the mirror image: they must continue to meet the dependent child definition, or have stopped meeting it only because they turned 18, at which point the study, work and dependency conditions take over.
Because the decision-time wording comes from the Regulations rather than the Department's public page, anyone relying on it should check the current text of clause 101.221 and the current official page before lodging, and treat continued full-time study up to the date of decision as the safe position.
What does "full-time study" actually mean for an 18–24-year-old?
The official page defines it in two parts. The applicant must be enrolled in a full-time course that leads to a professional, trade or vocational qualification, and must be attending classes. Enrolment alone is not enough; a course that does not lead to a professional, trade or vocational qualification does not satisfy the test.
Timing matters as well. The child should have started study since turning 18, or within 6 months (or a reasonable time) of finishing school, and any gap of more than 6 months between the final year of school and the start of further study must be explained. Suppose an applicant finishes Year 12 in November and does not enrol until February eighteen months later — that gap is over 6 months and the official page requires it to be accounted for, with the reason carrying the weight rather than the length of the enrolment.
Can the child work while the application is pending?
Not full time. The bar for the 18-to-24 route is that the applicant "can't work full time"; there is no requirement to be entirely unemployed. Departmental policy guidance for this visa (PAM3) treats an activity as work where it would normally attract pay, even if the applicant describes it as unpaid, so volunteer and "family business" arrangements are assessed on what the role actually involves rather than what it is called.
The practical risk is spillover. Paid hours that displace attendance, or a role that becomes the applicant's main source of income, undercut both the study test and the requirement to be financially dependent on the parent more than on any other person.
What else can break the position besides a birthday?
Four conditions tend to decide borderline cases, and all of them must hold continuously rather than on one day:
- No partner. The child cannot be, or ever have been, married, engaged to be married, or in a de facto relationship. "Ever" is doing real work here — a past marriage does not become irrelevant with time.
- Financial dependency. An 18-to-24-year-old must be financially dependent on the parent more than on any other person, which is why regular, documented support is usually stronger than a single letter.
- Approved sponsorship. The child must be sponsored by an eligible parent or that parent's spouse or de facto partner, and the sponsorship must be approved before the visa can be granted.
- Health, character and values. The child must meet the health requirement; the character requirement applies from age 16; and an applicant aged 18 or over must have read (or had explained to them) the Life in Australia booklet and signed the Australian Values Statement.
So when should an application be lodged?
If the child is anywhere near 25, the lodgement date is the one worth protecting. Suppose an applicant is 24 years and 10 months and in the final semester of a qualification: lodging while under 25 puts them inside the study route, and the Regulations' decision-time provision is what stops the 25th birthday from undoing that two months later. Waiting until after the birthday to "finish the paperwork cleanly" removes the route entirely.
This is a general explanation of how the published criteria are written, not advice on any individual situation, and it does not create an expectation about outcome; where a child is close to the limit, the wording in force at both lodgement and decision governs, and a registered migration agent or lawyer can assess the specific facts against it.
Frequently Asked Questions
Can a child who is already 25 apply for a Subclass 101 visa?
Only on the disability route. The 18-to-24 study route requires the applicant to be over 18 and under 25, and the Regulations apply that threshold at the time of application, so turning 25 before lodging closes it.
My child turns 25 while the application is being processed — will it be refused?
Not for that reason alone. Clause 101.221 of the Migration Regulations 1994 allows an applicant who was 18 or over at application to still be granted if the only reason they no longer meet the dependent child definition is that they turned 25.
Does a gap year break the full-time study requirement?
Not automatically, but it must be explained. The Department of Home Affairs page expects study to begin within 6 months (or a reasonable time) of finishing school, and requires any gap of more than 6 months to be accounted for.
Is my child allowed to work part time?
Yes, as long as it is not full-time work. The official bar is that the child "can't work full time", and the hours must not undermine either full-time study or financial dependency on the parent.
Is there an upper age limit if my child has a disability?
The Department's page states no upper age limit for this route. The applicant must be over 18, have totally or partially lost their bodily or mental functions, and be unable to work full time.
Does my child need to be single?
Yes. The applicant cannot be, or ever have been, married, engaged to be married, or in a de facto relationship — including before the application was lodged.