Do I Need a Health Examination for a Subclass 300 Visa in 2026?
Yes. If you are applying for the Prospective Marriage visa (Subclass 300), you need to have health examinations, and the visa cannot be granted without a valid health assessment. According to the Department of Home Affairs' official page for the Prospective Marriage visa (subclass 300), as at July 2026, you and any family members who apply for the visa with you must meet the health requirement, and the department may also ask for health information about family members who are not coming to Australia with you. This article is general information about how the published rules fit together, not personalised advice for your circumstances — for anything that turns on your own medical history or family situation, the details on the official pages and a qualified professional's opinion are what should guide you.
Is the health exam optional, or a hard requirement?
It is a hard requirement. The department's step-by-step guide for this visa lists organising health examinations as a step you must complete after you apply, and states plainly that it cannot grant you a visa unless you have a valid health assessment. Meeting the health requirement is also listed among the eligibility criteria you must satisfy, alongside sponsorship, age, relationship and character criteria — so it is not something you can defer until after a decision.
A useful way to read this: the exam is not a document you gather to strengthen your case. It is a criterion that has to be satisfied before the visa can be granted at all.
What does "valid health assessment" actually mean?
Two time limits are set out on the official page, and they are not the same thing:
- The results of your health assessment are valid for 12 months from the time you completed your examinations.
- If the department asks you to sign a health undertaking, that undertaking is valid for 6 months.
So the 12-month clock runs from when you finish the examinations, not from when you book them, pay for them, or submit the paperwork. A health undertaking is a separate instrument with its own, shorter validity, and it only comes into play if the department asks you for one.
Who else has to be examined — and what about family who are not migrating?
Three groups are worth distinguishing, because the published rules treat them differently.
You, the main applicant: your health assessment is required, full stop.
Family members who apply for the visa with you: the eligibility page states that you and any family members who apply with you must meet the health requirement. In practice this means each person on the application is assessed in their own right.
Family members who are not coming to Australia with you: this is the part that surprises people. The eligibility page says the department might ask for health information about family not coming to Australia with you. Under the Migration Regulations 1994 and the department's procedural guidance, the health criterion is framed as applying to the applicant's family members whether or not they are applying for the visa, and there is a limited discretion not to require an examination where it would be unreasonable to ask a non-applying family member to undergo one. Assume the question can be asked; whether it is, and how it is resolved, depends on the case.
Suppose an applicant has a child who will stay behind with relatives and is not listed on the application. Nothing in the published rules guarantees that child is simply outside scope. The department can seek health information about that child, and if a non-migrating family member's circumstances create a problem with the health criterion, it is not automatically confined to that person's file — the assessment is made against the criteria that must be met for the visa to be granted.
When should I actually book the exam?
The official guidance places the health step after you apply, and it gives a specific instruction about timing: before deciding when to complete your health examinations, refer to the published visa processing times.
That instruction exists because of the 12-month validity. Book too early and your results may lapse while the application is still being assessed; book too late and you may be waiting on the exam rather than on the department. The department has not published a single "correct week" to do it — it publishes processing times and asks you to plan against them, and the current figures are the ones on the official global visa processing times page.
What happens after I apply?
The sequence on the official page is straightforward: you apply online while outside Australia, you receive confirmation that the application has been received, and you then organise your health examinations through the process described on the department's "what health examinations you need" page. The department tells applicants separately if biometrics are required, and it may ask for more information at any point.
Two practical points follow from the published material. First, keeping an eye on your ImmiAccount matters, because that is where requests for further information appear. Second, the validity periods are the reason timing is a real decision rather than a formality: a 12-month result and a 6-month undertaking do not stay alive indefinitely while an application is pending.
Frequently Asked Questions
Is a health examination really required for a Subclass 300 visa, or only in some cases?
It is required. The Department of Home Affairs' official page for the Prospective Marriage visa (subclass 300) states that you need to have health examinations, and that it cannot grant the visa unless you have a valid health assessment.
How long are my health exam results valid?
Your health assessment results are valid for 12 months from the time you completed your examinations, per the department's official step-by-step guide for this visa.
What is a health undertaking, and how long does it last?
A health undertaking is something the department may ask you to sign as part of the health requirement process. The official page states that if you are asked to sign one, it will be valid for 6 months.
Do family members who are not moving to Australia need a health check?
Not automatically, but they are not excluded. The department's eligibility page says it might ask for health information about family not coming to Australia with you, and the regulations and procedural guidance frame the health criterion as covering family members whether or not they apply for the visa.
Can I do the health exam before I lodge my application?
The official guidance places organising health examinations in the steps after you apply, and advises you to check published visa processing times before deciding when to complete them, partly because results are valid for 12 months from the date you finished the examinations.
Where do I find out which specific examinations I need?
The department's official page directs applicants to its "What health examinations you need" page for the examinations that apply in your circumstances and for how to arrange them.
What if my results expire while my application is still being decided?
The official guidance does not spell out a remedy; what it does say is that a visa cannot be granted without a valid health assessment, and that you should consult published processing times when choosing when to complete your examinations.