The Migration Act 1958 does not mention it. The Migration Regulations 1994 do not mention it. There is no threshold, no percentage, and no point at which an application becomes harder as a matter of law.
This page explains the age rules that do exist, what a large age gap changes in practice, and how couples evidence an ordinary shared life.
What age rules are there?
Three, and none of them is about the gap.
- Both people in a de facto claim must be at least 18. Regulation 2.03A of the Migration Regulations requires it of the applicant and of the person they claim to be in a de facto relationship with, at the time of application.
- Married applicants must, in most cases, be 18 or older when they apply. The Department of Home Affairs says so on the subclass 820 page, and explains that this follows from the age at which a person can usually marry under Australian law.
- The best interests of a child apply. The Department says a visa might not be granted if it is not in the best interests of an applicant under 18.
Age requirements sets all three out in full. Beyond them, age is relevant only to the extent that any fact about a couple is relevant: as part of the circumstances of the relationship.
Why does a large age gap attract closer assessment?
Because of how the assessment is framed, not because of any rule aimed at age. Regulation 1.15A, for married spouses, and regulation 1.09A, for de facto partners, both require the Minister to consider all of the circumstances of the relationship, including four matters: the financial aspects, the nature of the household, the social aspects, and the nature of the couple's commitment to each other.
"All of the circumstances" is broad, and a case officer reading a file forms a picture from everything in it. A feature that is less common in the general run of applications — a large age difference, a very short relationship, a first meeting shortly before the wedding, no shared address — tends to prompt the officer to test the picture rather than accept it, which in practice means more questions.
Important
closer assessment is not a finding, a presumption or a strike against you. It is a request for more material. An age-gap relationship that is genuine and continuing meets the same test as any other relationship and is granted on the same criteria. The Department's own published criteria say nothing about age difference, and neither does the legislation.
It is also worth naming what the age gap is standing in for. The concern a case officer is testing is whether there is a mutual commitment to a shared life to the exclusion of all others and whether the relationship is genuine and continuing — the conditions in section 5F(2) for spouses and section 5CB(2) for de facto partners. Evidence that answers those conditions answers the concern. Nothing else needs to be argued.
What does a closer look involve?
Usually some combination of the following:
- A request for more information. The Department asks for specific additional evidence, with a deadline. Missing the deadline can mean a decision on the material already held. See requests for more information.
- An interview. Either or both of you may be interviewed, together or separately, in person or by phone or video. The questions are ordinary ones about your life together. Partner visa interviews explains how they run.
- Closer reading of the statements. The two personal statements and the supporting statutory declarations are compared against each other and against the documents. Inconsistent dates and details do more damage than a thin file.
- A natural justice letter. If the Department is considering refusing on information you have not had a chance to comment on, it must generally give you the opportunity. See natural justice letters.
None of these is unique to age-gap couples. They are the ordinary tools for any application where the evidence leaves questions open.
How do you evidence an ordinary shared life?
The same way every other couple does, and with the same headings. The point is not to prove that the relationship is plausible; it is to show the four matters.
Financial. A joint account with real activity, shared bills, a lease or mortgage in both names, superannuation or insurance nominations, a will, and an honest picture of how you split expenses. Where one partner earns or owns considerably more, describe the arrangement plainly rather than obscuring it — regulation 1.15A expressly contemplates pooling of resources and the basis on which day-to-day household expenses are shared. See financial aspects evidence.
Household. Who does what, who is responsible for what, correspondence addressed to both of you at the same address, and any caring responsibilities you share. See nature of the household evidence.
Social. Photographs across time with each other's families and friends, invitations addressed to you both, memberships, travel, and statements from people who know you. Australian citizens and permanent residents can use Form 888 statutory declarations. Ask the people who know you best, not the people with the most impressive titles.
Commitment. How long you have been together, how long you have lived together, the support you give each other, and what you both expect of the future. See commitment evidence.
Write the relationship statement as a factual account of how you met, how the relationship developed and how you live now. Age can be mentioned where it is genuinely part of the story and left alone where it is not.
Age-gap relationships often come with other features that need their own handling — an earlier marriage that has not yet been formally dissolved, or adult children from a previous relationship. If that applies, see applying before a divorce is final.
An application prepared by a migration lawyer is more likely to succeed where a file is likely to draw extra questions, for a specific reason: the difference between a grant and a refusal in these cases is usually whether the evidence was complete at lodgement or assembled in a hurry after a request arrived with a short deadline. No one can promise an outcome.
What to do next
Stop treating the age gap as the subject of the application and treat the four matters as the subject instead. Start with relationship evidence, decide what each heading is missing, and fill it before you lodge. Genuine and continuing relationship explains what a case officer is looking for under each one.
Common questions
Is there a maximum age difference for an Australian partner visa?
No. Neither the Migration Act 1958 nor the Migration Regulations 1994 sets any limit on, or makes any reference to, the difference in age between partners. The only age rules are that both people in a de facto claim must be at least 18 under regulation 2.03A, that married applicants must in most cases be 18 or older when they apply, and that a visa might not be granted where it is not in the best interests of an applicant under 18.
Does a large age gap make a partner visa harder to get?
It does not change the legal test, which is the same for every couple. What it can do in practice is prompt a case officer to look more closely at whether the relationship is genuine and continuing, because the Migration Regulations require the Minister to consider all of the circumstances of the relationship. Closer consideration is not a presumption against the couple; it usually means more questions and a greater chance of a request for more information or an interview.
What questions do couples with an age gap get asked?
There is no set list. In practice the questions tend to probe the parts of a shared life that the documents do not show on their own: how the household runs day to day, how decisions about money are made, how each partner's family and friends understand the relationship, what you do together, and what your plans are. The answers should match what the two personal statements and the supporting statements already say.
Should we explain the age difference in our application?
You are not required to justify it, and an application should not read as a defence. It is usually better to describe the relationship the way you would describe any relationship, with dates and specifics, and to let the age difference sit as one ordinary fact among others. If friends or family were initially surprised and are not any more, a supporting statement that says so is more persuasive than an argument.
Does an age gap combined with a short relationship cause problems?
Neither is a ground for refusal, but together they leave less material for the four matters the Minister must consider, especially the duration of the relationship and the time spent living together. The answer is the same as for any thin file: build the financial, household and social evidence deliberately rather than relying on the relationship history to speak for itself.
Sources
Keep reading
Partner Visas for Same-Sex Couples
Same-sex couples apply for the 820 and 801 on exactly the same criteria — what the Migration Act says, and how to evidence a relationship that had to be hidden.
Read the guide →
Getting Married in Australia Before Applying (NOIM)
The Notice of Intended Marriage, the one-month notice period, who can marry you, and what marrying in Australia does and does not do for a partner visa.
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Is Your Overseas Marriage Recognised in Australia?
The test for recognising an overseas marriage for a partner visa — section 5F(2)(a), section 12 of the Migration Act, Part VA of the Marriage Act, and the exceptions.
Read the guide →