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Insights

Insights

Personal deductible super contributions: how the deduction works and what to confirm before 30 June

One of the most accessible and underused tax planning tools available to working Australians is the personal deductible superannuation contribution. The principle is straightforward: a contribution made from after-tax money into superannuation can be claimed as a tax deduction, reducing assessable income. The effect is to shift income from being taxed at the individual's marginal rate — which can be as high as 47% including the Medicare levy — to being taxed at 15% inside the superannuation fund. For many clients, the difference is substantial. The conditions, however, are exacting, and the window for the 2025–26 year closes on 30 June.

How the deduction works

Concessional contributions are those made into superannuation for which a tax deduction is claimed, or that are made before tax. They include employer superannuation guarantee contributions, salary sacrifice contributions, and personal contributions for which the member claims a deduction. All of these count toward a single annual cap.

For the 2025–26 financial year, the concessional contributions cap is $30,000. This cap is inclusive of all employer contributions received during the year. A member who wishes to make a personal deductible contribution must first determine how much of the $30,000 cap remains after accounting for employer and salary sacrifice contributions already made.

The mechanism of the benefit is the difference in tax rates. Income that would otherwise be taxed at the member's marginal rate is instead contributed to superannuation and taxed at 15%. For a member on the 47% marginal rate, a $10,000 deductible contribution saves $4,700 in personal tax while incurring $1,500 in contributions tax inside the fund — a net benefit of $3,200, with the full $8,500 remaining invested for retirement.

The carry-forward provision

Members whose total superannuation balance was below $500,000 on 30 June 2025 may be able to contribute more than the standard $30,000 cap this year. The carry-forward rules allow unused concessional cap amounts from the previous five financial years to be added to the current year's cap.

This is a valuable provision for members who have not consistently maximised their concessional contributions — including those who spent time out of the workforce, ran a business through lean years, or simply did not have the surplus income to contribute in earlier years. A member who has accumulated significant unused cap can, in a single high-income year, make a substantially larger deductible contribution. For clients who have realised a capital gain or received an unusual income event this year, this provision warrants close examination.

The notice of intent: the step that is most often missed

This is the procedural requirement that causes the most lost deductions, and it is worth stating plainly. To claim a deduction for a personal contribution, the member must lodge a valid notice of intent to claim a deduction with their superannuation fund, and the fund must acknowledge that notice, before the deduction can be claimed.

The notice must be lodged by the earlier of two dates: the day the member lodges their income tax return for the relevant year, or 30 June of the following financial year. That timing alone catches some members. A more serious trap awaits those who act on their superannuation before lodging the notice. If a member rolls over their entire superannuation interest to another fund, withdraws their balance, or commences a pension using any part of the contribution before lodging a valid notice, the notice becomes invalid. The deduction is then lost permanently, with no avenue for recovery.

The practical guidance is simple: if you intend to claim a deduction for a personal contribution, lodge the notice of intent and obtain the fund's acknowledgement before doing anything else with that superannuation — and certainly before commencing any pension or rollover.

Timing for the 2025–26 year

The contribution must be received by the superannuation fund by 30 June 2026 to count toward the 2025–26 year. Initiating a transfer on 30 June is not sufficient if the fund does not receive it until July. Electronic contributions can take several business days to clear through the superannuation payment system. A contribution intended for this financial year should be made well before the final days of June.

In practice

The personal deductible contribution is one of the cleanest tax planning tools available, yet its benefit depends entirely on the conditions being met precisely — the cap, the timing, and above all the notice of intent. The cost of getting any one of these wrong is the loss of the deduction.

If you would like to work through your contribution position before 30 June, we welcome the conversation.

Corinne Kirk
Partner, Accountant

1300 102 542 | 0405 106 401
corinne@egu.au

Sources

This is general advice. It does not take account of your objectives, financial situation, or needs, and is not a substitute for advice that does. Before acting on anything in it, consider whether it suits your circumstances, and consider the relevant Product Disclosure Statement.

Corinne Kirk