In most Australian couples, one partner ends up with substantially more super than the other. Usually it’s the person who took time out of the workforce to raise children, worked part-time for years, or simply earned less. The result is a persistent gap, and on average men retire with around 30% more super than women.
There are two strategies designed to close that gap, and they get confused constantly. Spouse contributions and contribution splitting sound similar, but they do different jobs. A spouse contribution is new after-tax money you pay into your partner’s super and it may entitle you to a tax offset. Contribution splitting lets you move up to 85% of your own concessional contributions to your spouse’s super after they’ve been made, without tipping in extra cash and without any tax offset. Use spouse contributions when you want to boost a lower-income spouse’s balance and potentially claim the offset; use contribution splitting when you want to even up super balances using contributions already in the system.
For Australian couples with uneven super balances, especially those trying to improve retirement tax outcomes before retirement, the choice can be worth thousands. This guide explains the difference between the two, who can use them, the tax offsets, eligibility rules, timing and caps, and when each strategy may help with transfer balance cap planning, Division 296 exposure and Centrelink outcomes. Understanding which one to use — and when to use both — matters more than ever now that super balances can affect your tax position as much as your retirement savings.
The Core Difference
A spouse contribution is when you take money from your own after-tax income and contribute to your spouse’s super or spouse’s super account on behalf of them. It’s new money entering the super system. It counts towards their non-concessional cap, not yours, and if they’re on a low income, it may entitle you to a tax offset of up to $540. This strategy is generally available if you’re married, including in a de facto partnership, or otherwise in a recognised de facto relationship.
Contribution splitting is when you transfer up to 85% of the concessional (before-tax) contributions already made to your super — employer SG, salary sacrifice, personal deductible contributions — across to your partner’s account. No new money enters super. It’s a redistribution, applied for after the end of the financial year.
The simplest way to hold them apart:
Spouse contribution | Contribution splitting | |
|---|---|---|
What it is | New after-tax money you pay in | Transfer of contributions already made |
Source | Your take-home pay | Your concessional contributions |
Tax benefit | Up to $540 tax offset for you | No offset; balance redistribution only |
Counts towards | Your spouse's non-concessional cap | Your concessional cap (not theirs) |
Timing | Any time during the financial year | After the financial year ends |
Costs you cash | Yes | No |
The last row is the practical one. A spouse contribution requires cash out of your pocket. Splitting doesn’t — you’re just moving contributions that were happening anyway. It also doesn’t affect the receiving spouse’s cap, but the contribution itself remains subject to non-concessional contribution restrictions, including the annual cap of $120,000 per year.
Spouse Contributions and the $540 Tax Offset
If you make an after-tax contribution to your partner’s super and they earn a low income, you can claim a tax offset in your own return.
How it’s calculated: the offset is 18% of the lesser of (a) $3,000 reduced by every dollar your spouse’s income exceeds $37,000, and (b) the total spouse contributions you made.
In practice:
Spouse earns $37,000 or less and you contribute $3,000 → you claim the full $540 (18% of $3,000).
Contribute only $2,000 → you claim $360 (18% of $2,000).
Spouse earns $38,000 → the $3,000 base reduces by $1,000 to $2,000, so your offset is $360.
Spouse earns $40,000 or more → no offset at all.
Contributing more than $3,000 doesn’t increase the offset — it’s capped at $540 regardless. Any excess simply counts towards your spouse’s non-concessional cap ($130,000 for 2026–27).
Eligibility requirements:
You and your spouse are Australian residents and not living separately and apart on a permanent basis
Your spouse is under 75 when the contribution is made
Your spouse’s income is under $40,000
Your spouse hasn’t exceeded their non-concessional contributions cap
Your spouse’s total super balance was below the general transfer balance cap ($2.1 million as at 1 July 2026) at the end of the previous financial year
The contribution is not claimed as a deduction by you
One important note: the offset is not refundable. If you don’t have enough tax payable to absorb it, you can’t get the unused portion back.
Contribution Splitting: The 85% Rule and Eligibility Criteria
Splitting lets you shift concessional contributions across to your spouse’s account. The mechanics:
You can split up to 85% of your taxed splittable contributions from the previous financial year. The 15% you can’t split is the contributions tax the fund has already paid to the ATO.
Splittable contributions include employer SG, salary sacrifice, and personal deductible contributions.
The split still counts towards your own concessional cap, not your spouse’s. So splitting doesn’t create extra cap space for either of you — it just moves the balance.
You apply after the end of the financial year in which the contributions were made, using your fund’s splitting form. (The exception: if you’re rolling over your entire balance, you can split within the current year.)
Your fund has discretion to allow or refuse the request — not all funds offer splitting.
Your spouse must be under preservation age (60), or if aged between preservation age and 64, must be gainfully employed.
If you’re claiming a deduction on personal contributions, you must lodge the notice of intent to claim with your fund before applying to split.
A common mistake worth flagging: you cannot claim the spouse tax offset on contributions you split. Split contributions are treated as a rollover, not a spouse contribution. They’re two separate mechanisms, and only one attracts the offset.
Why Evening Up Balances Matters More Now
Beyond the offset, there’s a strategic reason couples increasingly want balanced super accounts.
The transfer balance cap limits how much you can move into a tax-free retirement pension — $2.1 million per person as at 1 July 2026. It’s a per-person cap, so a couple with $2 million each can move $4 million into tax-free pension phase, while a couple where one partner holds $3.5 million and the other holds $500,000 cannot. Balance concentration wastes cap space.
Division 296 adds extra tax on earnings attributable to balances above $3 million. Spreading super across two accounts can keep both partners below that threshold, where a single concentrated balance would breach it.
There’s also a Centrelink angle: super in accumulation phase isn’t assessed until the member reaches Age Pension age. If one partner is older, holding more super in the younger partner’s name can temporarily shelter it from the assets and income tests — a legitimate strategy that can preserve pension entitlements during the gap years. The right mix depends on your personal circumstances and when you decide to use one strategy or both for the tax benefits.
So Which Should You Use?
Use a spouse contribution when:
Your partner earns under $40,000 (the offset is only available below this)
You have spare after-tax cash flow to contribute
You want a tax offset for yourself as well as a boost to their balance
Your partner has room within their non-concessional cap
Be aware that super rules, caps and restrictions can change, so tailored advice matters.
Use contribution splitting when:
Your partner earns too much for the spouse offset
You don’t have spare cash but do make significant concessional contributions
Your goal is purely to even up balances for transfer balance cap, Div 296 or Centrelink reasons
You’re a high earner salary sacrificing heavily
The right approach depends on your circumstances, including whether contributions are being made for a married or de facto partner and whether the contribution splitting rules are met.
Use both when you can. They’re not mutually exclusive. A high earner might salary sacrifice, split 85% of those concessional contributions to their spouse after year-end, and make a $3,000 after-tax spouse contribution to capture the $540 offset — provided all caps and eligibility rules are met. The right mix depends on your ages, incomes and balances.
Where Professional Advice Adds Value
These two strategies look simple on paper and interact with almost everything else in your super. The offset has five eligibility conditions and phases out over a $3,000 income band. Splitting has age tests, timing rules, fund discretion, and a notice-of-intent trap that can cost you a deduction. And the strategic reason for using them — transfer balance cap efficiency, Division 296, Centrelink timing — depends entirely on your ages, balances and how far you are from retirement.
At Money Path, we model this properly. We work out whether a spouse contribution, contribution splitting, or a combination of both gives you the best result across the offset, your caps, and your long-term retirement position. In the FAQs, we also clarify who qualifies if you are married or in a de facto relationship, when a contribution is made to a spouse’s super on their behalf, how the $540 maximum tax offset works, and when a lower-income band only produces a partial tax offset. We also explain how much can be split from a super fund, including employer contributions and salary sacrifice contributions, and that the amount is transferred to a spouse’s super account without changing either person’s concessional cap or otherwise affect that limit. If you intend to roll over or withdraw your balance, the current-year exception may apply depending on your super fund’s rules. And if you can use both strategies, the answer depends on your circumstances and how you decide to balance cash flow, caps and tax benefits. We look at your ages and balances against the transfer balance cap and Division 296 thresholds, so the strategy is building toward a genuinely tax-effective retirement rather than capturing a $540 offset in isolation. We handle the timing and the paperwork traps — notice of intent, splitting deadlines, cap headroom — that quietly derail these strategies. And where one partner is significantly older, we factor in the Centrelink implications of which name the super sits in.
A $540 offset is worth having. But the real value of evening up super between a couple compounds over decades and shows up as a larger, more tax-effective retirement income for both of you. That’s the outcome worth planning for.
If you and your partner have unequal super balances, talk to the team at Money Path about the most effective way to close the gap.
Frequently Asked Questions
What’s the difference between spouse contributions and contribution splitting? A spouse contribution is new after-tax money you pay from your take-home pay directly into your partner’s super account, which may entitle you to a tax offset of up to $540. Contribution splitting transfers up to 85% of concessional contributions already made to your own super across to your partner’s account. Splitting costs you no extra cash but attracts no tax offset.
How much is the spouse contribution tax offset? Up to $540 per financial year. It’s calculated as 18% of the lesser of $3,000 (reduced by every dollar your spouse’s income exceeds $37,000) and the total spouse contributions you made. You receive the full $540 if your spouse earns $37,000 or less and you contribute $3,000. The offset phases out entirely once your spouse earns $40,000 or more.
Can I claim the tax offset on split contributions? No. Contributions split from your own super to your spouse are treated as a rollover, not as spouse contributions, so they don’t qualify for the $540 tax offset. Only new after-tax contributions you make directly into your spouse’s account are eligible. This is one of the most common misunderstandings about these two strategies.
How much of my super can I split with my spouse? Up to 85% of your taxed splittable concessional contributions from the previous financial year, including employer SG, salary sacrifice and personal deductible contributions. The 15% you can’t split represents the contributions tax the fund has already paid. The split still counts towards your own concessional cap, not your spouse’s.
When can I apply to split my super contributions? Generally after the end of the financial year in which the contributions were made, using your fund’s splitting application form. The exception is if you’re rolling over your entire balance, in which case you can split within the current year. Your fund has discretion to allow or refuse the request, and not all funds offer splitting.
Why should couples even up their super balances? Several reasons. The transfer balance cap is per person ($2.1 million as at 1 July 2026), so concentrated balances waste tax-free pension capacity. Division 296 adds extra tax on earnings attributable to balances above $3 million, and spreading super can keep both partners below it. If one partner is older, holding super in the younger partner’s name can also temporarily shelter it from Centrelink assets and income testing.
Who is eligible for the spouse contribution tax offset? You and your spouse must be Australian residents and not living separately and apart permanently. Your spouse must be under 75, earn under $40,000, not have exceeded their non-concessional cap, and have had a total super balance below the general transfer balance cap ($2.1 million as at 1 July 2026) at the end of the previous year. You must not claim the contribution as a deduction.
Can I use both spouse contributions and contribution splitting? Yes, and for many couples that’s the optimal approach. You might salary sacrifice into your own super, split 85% of those concessional contributions to your spouse after year-end, and separately make a $3,000 after-tax spouse contribution to capture the $540 offset — provided all cap and eligibility rules are satisfied. The right mix depends on your ages, incomes and balances.
Does contribution splitting give me extra contribution cap space? No. Split contributions still count towards your own concessional cap, not your spouse’s. Splitting doesn’t create additional cap room for either of you; it simply redistributes where the balance sits. Its value is in evening up balances for transfer balance cap, Division 296 and Centrelink purposes, not in increasing how much you can contribute.
This article is general information only and does not take into account your personal objectives, financial situation or needs. Super thresholds, caps and rules are indexed and change; figures are current as at the date of writing for the 2026–27 financial year. Always confirm current figures with the ATO and seek personal financial advice before acting.
