The Spouse Super Contribution Tax Offset: Turn Your Partner's Low Income Into Up to $540 Off Your Tax Bill
If your spouse earns under $40,000 a year - maybe they are working part time, between jobs, or home with young kids before heading back to work - putting money into their super instead of your own can get you a tax offset of up to $540. It is not a loophole. It is a deliberate incentive that has sat in the tax law for decades, and in our experience it is one of the least-used strategies available to ordinary working couples, mostly because almost nobody mentions it to them.
Baron Tax & Accounting is a registered tax agent based in Rochedale South, Brisbane, and this kind of superannuation planning comes up regularly with the individuals and couples we work with across Australia - the spouse contribution offset most often with clients in their thirties and forties where one partner has stepped back from full-time work. This guide sets out who actually qualifies, how the $540 is worked out once your spouse earns above the base threshold, the total super balance test that trips people up, and how this offset sits alongside the other superannuation concessions we have covered on this blog.
One thing worth saying upfront: this is a 2026-27 guide. The income thresholds involved move slowly - some have not changed since 2017 - but the total super balance figure that decides eligibility is indexed and has moved twice in the past two years, so the numbers below are specific to contributions made in this financial year, not the slightly different figures you might find on an older page.
What This Guide Covers
What the Spouse Contribution Tax Offset Actually Is
This is a tax offset, not a deduction, and the distinction matters. When you make a personal super contribution on behalf of a spouse whose income is low, the money goes into their super fund - not yours - and in return the ATO reduces the tax you personally owe. Your spouse ends up with a bigger retirement balance, and you end up with a smaller tax bill. Nobody has to apply for anything in advance; it is simply claimed as a tax offset when you lodge your own return.
The maximum available is $540, which works out to 18% of a $3,000 contribution. Like most Australian tax offsets, it is non-refundable - it reduces the tax you would otherwise pay, but it will not generate a cash refund on its own if your tax bill is already at zero before you apply it.
The $37,000 to $40,000 Income Window That Decides Your Offset
The offset is tied entirely to your spouse's income, not yours. Full offset eligibility, subject to how much you actually contribute, starts when your spouse's income is $37,000 or less. It then reduces dollar for dollar above that, and disappears completely once your spouse's income reaches $40,000.
Income here is a specific measure, not just a payslip figure - it is your spouse's assessable income, plus any reportable fringe benefits and reportable employer super contributions, excluding any First Home Super Saver amount they might have released. What catches people out is the reportable fringe benefits part. A spouse on a modest base salary with a novated lease or other packaged benefit can have a reportable fringe benefit amount that pushes their total over $40,000 even though their take-home pay looks well under it.
What we find in practice is that couples often assume this offset applies at a much higher income than it does. If your spouse is earning $45,000 working part time, this is not available to you at all, regardless of how much you contribute.
(Source: ATO, Super-related tax offsets)
Working Out Exactly How Much You Get Back
The formula is 18% of the lesser of two numbers: $3,000 reduced by every dollar your spouse earns above $37,000, or the total amount you actually contributed for your spouse that year.
Two examples make this more concrete than the formula does on its own. Say your spouse earns $30,000 and you contribute $5,000 on their behalf - the offset caps out at 18% of $3,000, which is $540, and the extra $2,000 simply builds their balance without adding any further offset. Now say your spouse earns $38,000 and you contribute $2,500 - the $3,000 base is reduced by $1,000, the amount your spouse earns over $37,000, leaving $2,000, which is lower than your $2,500 contribution, so the offset is 18% of $2,000, or $360.
The number that actually matters here is the $3,000 contribution cap built into the offset itself. Putting in more than that does not buy you a bigger offset - it just means more of your money sitting in your spouse's fund rather than, say, a joint savings account you can both still access.
Who Actually Qualifies, on Both Sides of the Contribution
Both of you need to tick a set of conditions, and we find it helps to think of them separately rather than as one long list.
On your side, the contribution must not be deductible to you - that is, you are not claiming it as your own tax deduction, because a contribution you deduct becomes a concessional contribution and stops being a personal spouse contribution for this purpose. You and your spouse both need to have been Australian tax residents at the time you made the contribution, and you cannot be living separately and apart on a permanent basis.
On your spouse's side, they need to have been under 75 at the time of the contribution, and they must not have exceeded their own non-concessional contributions cap for the year - currently $130,000 for 2026-27. The ATO's definition of spouse is broader than a marriage certificate, too: it also covers de facto relationships, including same-sex couples, provided you are living together on a genuine domestic basis.
The Total Super Balance Test for 2026-27
This is the condition we see missed most often, because the figure quietly changes from year to year. Your spouse's total super balance has to sit below the general transfer balance cap that applies for the financial year the contribution is made in, tested as at 30 June immediately before that year starts.
For a contribution made in the 2026-27 financial year, that means your spouse's total super balance needs to have been under $2.1 million at 30 June 2026, the general transfer balance cap that took effect for 2026-27. That is a step up from the test that applied to 2025-26 contributions, which used a $2 million balance measured at 30 June 2025. If you have seen two million dollars quoted for this offset somewhere, it is almost certainly describing last year's rules rather than this one.
In practice this test rarely affects younger couples with modest balances, but it becomes genuinely relevant for a spouse who has had a previous career, an inheritance into super, or a large balance from a defined benefit scheme - it is worth checking rather than assuming.
(Source: ATO, Transfer balance cap)
Contributions That Do Not Count Toward This Offset
The mistake we see most often is not actually about the dollar figures at all - it is a couple who have been diligently salary sacrificing into the lower-earning partner's fund for years, assuming that counts toward this offset. It does not. Salary sacrifice contributions are concessional, arranged through an employer, and this offset only applies to a personal, non-concessional contribution you make directly, outside of any salary sacrifice arrangement.
Salary sacrifice or other employer contributions made to your spouse's fund
Any contribution your spouse has claimed, or intends to claim, as their own personal tax deduction
Contributions made to satisfy a family law superannuation splitting order
Contributions made once your spouse's non-concessional contributions cap for the year has already been used up
How This Differs From the Government's Super Co-Contribution
We get asked fairly often whether this is the same thing as the government's super co-contribution, and it is a reasonable question because both schemes reward a low to middle income earner's super balance. They are not the same, and understanding the difference tells you which one actually applies to your household.
The super co-contribution rewards someone for contributing to their own super out of their own after-tax income - the government then matches it, up to $500, and deposits that straight into their fund. The spouse contribution offset works the other way around: it rewards the higher-earning partner for putting money into the lower-earning partner's fund, and the benefit lands as a tax offset on the contributing partner's own return, not as a deposit into anyone's super account. We have covered the co-contribution in detail separately, including the exact 2026-27 income thresholds, in our guide to the government super co-contribution.
A household can genuinely use both in the same year, because they involve different contributions from different people - the lower-earning spouse making their own personal contribution for the co-contribution, and the higher-earning spouse separately contributing on their behalf for this offset. They are not two ways of describing the same payment.
Mistakes We See Couples Make With This Offset
Beyond confusing salary sacrifice with a qualifying contribution, a handful of other errors turn up repeatedly in the contributions we review each tax season.
Contributing on 30 June itself and assuming that is enough - the fund actually needs to receive and process the payment within the financial year, not just have it initiated, so leaving it to the last day is genuinely risky
Overlooking reportable fringe benefits when estimating a spouse's income, which can tip someone from eligible to not eligible without their payslip looking any different
Missing the total super balance test altogether, particularly where a spouse has super sitting in an old fund from a previous job that is easy to forget about
Contributing well above $3,000 expecting a bigger offset, when the $3,000 cap on the offset calculation means anything beyond that buys no extra tax benefit this way
Claiming the offset when the contributing spouse has little or no tax payable for the year, which leaves the offset with nothing to reduce
How Baron Tax & Accounting Can Help
Working out whether this offset applies to your household means checking your spouse's income definition correctly, confirming the total super balance test, and making sure the contribution itself is structured as a genuine personal contribution rather than something that accidentally falls foul of the rules above. Baron Tax & Accounting is a registered tax agent working with individuals and couples across Australia on exactly this kind of superannuation planning, and getting it right before 30 June is what actually determines whether you see the $540 on your return.
Here is how it works with us: you tell us your situation and your spouse's expected income for the year, we work out whether the offset actually applies and how much contribution gets you the full $540, and a registered tax agent lodges your return with the offset correctly claimed, no myGov navigating required on your end.
You can see how our online tax return service works, or get in touch directly if you would rather talk it through first.
Frequently Asked Questions
Can I claim this offset if my spouse and I lodge separate tax returns?
Yes. In Australia, each partner always lodges their own individual tax return, there is no joint return, and this offset is simply claimed on the contributing spouse's own return.
Does my de facto partner count as a spouse for this offset?
Yes. The ATO's definition of spouse for this purpose includes de facto relationships, including same-sex couples, as long as you are living together on a genuine domestic basis.
What happens if my spouse's income ends up over $40,000 for the year?
You simply will not be entitled to the offset for that income year. The contribution you made still sits in your spouse's super fund as normal, you just will not get the tax offset for it.
Can I claim both this offset and a deduction for my own super contributions in the same year?
Generally yes, because they relate to entirely different contributions, one is about money going into your spouse's fund, the other is about a personal contribution to your own fund that you have separately chosen to claim as a deduction.
Is there a limit on how many years I can claim this offset?
No. There is no lifetime limit on claiming it, it is assessed fresh each financial year against that year's income thresholds, contribution amount and total super balance test.
Does it matter which super fund my spouse's money goes into?
It needs to go to a complying super fund or retirement savings account. Most retail and industry super funds in Australia meet this requirement, it is worth a quick check if your spouse's fund is an unusual or overseas arrangement.
Related Reading
Contact Baron Tax & Accounting
If you have questions about whether this offset applies to your situation, or you would like us to handle your return this tax season, reach out any time:
Address: 758 Underwood Road, Rochedale South QLD 4123
Phone: +61 7 3706 3147 or 1300 087 213
Email: info@baronaccounting.com
Hours: Monday to Friday 09:30 to 17:00
This article provides general information only and does not constitute personal tax or financial advice. It does not take into account your objectives, financial situation or needs. Tax rules change and apply differently to each person's circumstances. Before acting, please seek advice from a registered tax agent. Baron Tax & Accounting accepts no liability for any loss arising from reliance on this article. Source references: ATO (ato.gov.au) and other Australian government agencies, current as at the date of publication.
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