Important: General information only. It isn’t personal advice. Consider speaking with a licensed adviser and registered tax agent about your situation.
Why super is a tax engine
Super can be one of the clearest ways to legally pay less tax while building wealth. You could get two benefits. First, on the way in, deductible super contributions may reduce your taxable income at your marginal rate, while the contribution is generally taxed at 15% inside the fund. Second, once invested, earnings in accumulation are usually taxed at 15% (capital gains often effectively 10% after the 1/3 CGT discount inside super for assets held more than 12 months), and in retirement phase earnings on the portion supported by a retirement income stream could be 0%, up to the transfer balance cap. If you’re on a high income, the gap between 47% marginal tax and the tax rates inside super can add up over time.
This guide steps through the contribution tools, how they may work together, and where people often trip up. To keep it real, we’ll use $250,000 income for the main example and keep the numbers simple.
If you want to pair these rules with broader money moves, these reads may help: Tax-efficient investing in Australia, What is debt recycling and Should I invest or pay off my mortgage.
The contribution toolbox at a glance
- Concessional contributions (CCs): employer SG, salary sacrifice, or personal deductible contributions. Cap = $30,000 p.a. Taxed 15% in the fund. ATO: Concessional contributions.
- Carry-forward CCs (catch-up): if your Total Super Balance (TSB) was < $500,000 on the previous 30 June, you could use unused CC cap amounts from up to the prior 5 years. ATO: Carry-forward concessional contributions.
- Non-concessional contributions (NCCs): after-tax contributions. Cap = $120,000 p.a. Bring-forward may allow up to $360,000 at once, if you meet TSB rules. ATO: Non-concessional contributions.
- Downsizer contribution: if you’re 55+, you may be able to contribute up to $300,000 each from the sale of your home, outside the NCC cap. ATO: Downsizer contributions.
- Spouse strategies: contribution splitting and the spouse tax offset for eligible situations. ATO: Splitting contributions and Spouse tax offset.
- Division 293 tax: if income + concessional contributions exceed $250,000, an additional 15% may apply to some or all concessional contributions. ATO: Division 293.
Concessional contributions: your deductible top-ups
What counts
- Employer Super Guarantee (SG)
- Salary sacrifice via payroll
- Personal contributions you intend to claim as a deduction (with a valid notice of intent lodged and acknowledged by your fund before you lodge your return) — ATO: Notice of intent
Cap and timing
The annual concessional cap is $30,000. Your employer SG and any salary sacrifice use up this cap. Personal deductible contributions count too. Because the cap is per financial year, you may want to check timing in June so you don’t overshoot.
What it could save at $250,000 income
- Say you make a $20,000 personal deductible contribution.
- At $250,000 income your marginal tax rate is 45% plus 2% Medicare = 47%. A $20,000 deduction could reduce your personal tax by $9,400.
- Inside super, the $20,000 is generally taxed 15% on entry, which is $3,000.
- Net tax benefit ≈ $6,400, plus the contribution is now set to earn in a lower-tax environment, which may compound faster over time.
If Division 293 applies
High-income earners might also pay Division 293. That can lift the effective contributions tax on some or all concessional contributions from 15% to 30%. Even so, for someone on a 47% marginal rate, there’s usually still a gap on the way in. ATO: Division 293.
Salary sacrifice or personal deductible
- Salary sacrifice can smooth cash flow and reduce PAYG during the year.
- Personal deductible contributions might suit people with variable income or lumpy bonuses, since you can wait until late in the year to decide the amount.
- The tax result is generally similar if the total concessional amount is the same and caps are respected. The admin steps differ, so you may want to lock in your notice of intent process if you use personal contributions.
Carry-forward concessional (catch-up): turn unused caps into a larger deduction
If your TSB was < $500,000 at the previous 30 June, you may be able to draw on unused concessional cap amounts from the past 5 years to make a larger deductible contribution this year. This could be handy in a high-income year, when you’ve sold an asset at a gain, or if you’re returning to work after a break. ATO: Carry-forward concessional contributions.
Worked example at $250,000 income
- Assume your TSB at 30 June last year was $420,000, so you’re within the eligibility threshold.
- Your ATO online services show $35,000 of unused concessional cap amounts across the last few years.
- This year you also wish to contribute the standard $30,000 concessional cap.
- You could consider contributing $65,000 in total, claim it as a deduction, and reduce taxable income at 47%, which would reduce personal tax by ≈ $30,550.
- Contributions tax inside super could be 15% or 30% where Division 293 applies, still leaving a substantial net benefit for many high-income earners.
Practical checks
- You may want to confirm TSB < $500,000 at the prior 30 June.
- Checking your unused cap amounts in myGov/ATO online before contributing could prevent overshoots.
- If you salary sacrifice, coordinating with payroll can reduce the risk of going over the cap late in the year.
Non-concessional contributions: after-tax boosts and the bring-forward rule
NCC cap and who might use it
$120,000 p.a. is the standard NCC cap. These contributions don’t get a tax deduction and there’s no 15% contributions tax on the way in. The point is to move more after-tax money into super so future earnings may be taxed at 15% in accumulation and potentially 0% in retirement phase. ATO: Non-concessional contributions.
Bring-forward
If eligible, you may be able to bring forward up to 3 years of NCC caps and contribute up to $360,000 in one go. Your TSB and the transfer balance cap interact with bring-forward eligibility, so you might want to check those settings before you move a large amount.
When it could help
- You’ve sold an asset or received an inheritance, and you’d like more of the portfolio growing in super’s lower-tax environment.
- You and your partner want to even out balances to make better use of retirement phase later on.
- You’re building the base so part of your balance could move to retirement phase when you meet a condition of release.
Risks to watch
- Triggering bring-forward starts a multi-year cap period.
- If your TSB later crosses a threshold, eligibility for further NCCs can change. A quick plan before you press go could save headaches later.
Downsizer contribution: a powerful one-off
If you’re 55 or older and you sell your main residence, you may be able to contribute up to $300,000 each (so $600,000 for a couple) to super, outside the NCC cap. This can be a clean way to shift home equity into super so future earnings are taxed at 15% in accumulation or 0% in retirement phase. The eligibility rules and timing are specific, so you may want to read the ATO’s Downsizer contributions and speak with your tax adviser before you sign contracts.
Spouse strategies: contribution splitting and the spouse tax offset
Contribution splitting might allow you to move up to 85% of your concessional contributions to your spouse’s account, subject to fund rules and caps. ATO: Splitting contributions. Couples often consider splitting to:
- Even out balances, which could help both partners use retirement phase and the transfer balance cap.
- Bring more of the family capital under the 0% earnings umbrella sooner.
- Manage access timing if one partner may reach preservation age earlier.
Spouse tax offset
If your partner’s income is within limits, a personal contribution to their super could create a tax offset for you. Check thresholds on the ATO’s Spouse tax offset page.
The long-term kicker: tax on earnings inside super
Even if the deduction didn’t exist, super could still be attractive because of ongoing tax. In accumulation, earnings are usually taxed at 15%, with CGT often effectively 10% after the 1/3 discount inside super for assets held more than 12 months. In retirement phase, earnings on the portion supported by a retirement income stream are generally 0%, up to the transfer balance cap. Over long periods, that difference can change outcomes meaningfully.
If you want ideas for tax-aware investing outside super as well, have a read of Tax-efficient investing in Australia.
Putting it together: three simple game plans
Plan A: High-income professional at $250,000
- You could consider turning on salary sacrifice to target the $30,000 concessional cap, adjusting for employer SG.
- If eligible (TSB < $500,000), you might add a carry-forward top-up to soak up prior unused caps in a high-income year.
- Contribution splitting to a spouse could help balance retirement timing or transfer balance cap usage.
- Keeping investments simple inside super may help compounding do the heavy lifting.
- It could be worth checking the Division 293 position early so there are no surprises.
Plan B: Big capital gain year
- You might estimate the gain and your taxable income early, then map a contribution plan.
- Consider using carry-forward CCs to make a larger deductible contribution that may reduce the tax bill in the year of the gain.
- If appropriate and eligible, you could layer NCC bring-forward to move additional after-tax cash into super for lower ongoing tax.
- If property sale and age fit, assessing a downsizer contribution could shift equity efficiently.
Plan C: Couple strategy in the 50s
- You might aim to fill both $30,000 concessional caps via salary sacrifice or personal deductible contributions.
- Split contributions toward the partner who’ll reach preservation age first or who has the lower balance, if that helps your retirement-phase plan.
- If suitable, NCC or bring-forward may help even out balances so both partners could use retirement phase closer to the transfer balance cap.
- If you’re 55+ and planning to sell the home, downsizer could add a significant one-off boost.
Clean admin, common pitfalls and an annual rhythm
A lot of the benefit comes from avoiding unforced errors. A short checklist might help:
- Caps and timing: checking your CC and NCC caps before 30 June could prevent excess contributions.
- Notice of intent: if you plan to claim a personal deductible contribution, you may want to lodge the notice of intent promptly and keep the fund’s acknowledgment.
- TSB and eligibility: confirming TSB before relying on carry-forward or bring-forward could save a headache.
- Division 293: if you’re near $250,000, planning cash flow for a possible Division 293 assessment might avoid surprises.
- Multiple funds: if you’ve got more than one fund, you might confirm contributions across all funds so the total doesn’t exceed caps.
- Review cadence: a simple “June 1” review could give you enough time to tidy caps, notices, and payroll settings.
FAQs
How much can I contribute pre-tax each year
The standard concessional cap is $30,000 p.a. This includes employer SG, salary sacrifice and personal deductible contributions.
Who can use catch-up concessional contributions
If your TSB was < $500,000 at the previous 30 June, you may be able to use unused concessional cap amounts from up to the prior 5 years.
Is salary sacrifice better than a personal deductible contribution
The tax outcome is usually similar if the total concessional amount is the same. Salary sacrifice could smooth PAYG through the year, while personal deductible contributions might suit lumpy income because you decide the amount later. You generally need a notice of intent if you claim a personal deduction.
What happens if I go over the cap
Excess concessional contributions are usually counted as assessable income, with an offset to reflect contributions tax already paid. There can also be excess contributions charge aspects. You might want to speak with your tax agent quickly if this happens.
How do non-concessional and bring-forward work
The standard NCC cap is $120,000 p.a. If eligible, you might bring forward up to $360,000 in one year. Your TSB and the transfer balance cap influence eligibility and amounts.
What’s the transfer balance cap right now
As a guide, the general transfer balance cap is $2.0m from 1 July 2025. Personal circumstances vary due to indexation history. You may want to confirm your personal cap on the ATO site.
Can we move money between spouses
You may be able to split up to 85% of concessional contributions to a spouse, subject to fund rules. The spouse tax offset could also apply where the receiving spouse’s income is within thresholds.
Does a downsizer contribution affect NCC caps
No. Downsizer is outside the NCC cap, subject to meeting eligibility and timing rules.
Could Division 293 wipe out the benefit for high earners
It usually doesn’t. Division 293 may lift contributions tax to 30% on some or all concessional contributions, but that’s still below a 47% marginal rate, so there’s normally a gap.
Where does investment strategy fit in
Super is the tax wrapper. You could still want a sensible investment mix. If you want ideas for structuring money outside super as well, try Tax-efficient investing in Australia, and for cash-flow trade-offs see Should I invest or pay off my mortgage. If you’re exploring combining mortgage strategy and investing, What is debt recycling may help.
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Disclaimer: The information contained in this article is general in nature and does not take into account your personal objectives, financial situation or needs. Therefore, you should consider whether the information is appropriate to your circumstances before acting on it, and where appropriate, seek professional advice from a finance professional.