An SMSF can deduct almost two years of concessional cap in one return. The ATO form has to go in with it

A single SMSF member can claim a tax deduction for almost two years of concessional contributions in one financial year, and breach the cap in neither year. Take the June just gone. The 2025-26 concessional cap was $30,000 and the 2026-27 cap is $32,500, so a member who set the arrangement up correctly could claim $62,500 as a deduction in their 2025-26 return. The mechanism is a contribution reserve. It works only inside a self-managed fund, the ATO accepts it as valid where every legal requirement is met, and whether it holds up comes down to a 28-day allocation window, four documents, and one ATO form that the ATO says to lodge before or with the returns.

How one June contribution counts in two years

Two rules combine. Under regulation 7.07H of the SIS Regulations, which replaced the repealed reg 7.08 on 1 July 2026 and carried the 28-day period over, an SMSF trustee that receives a contribution in a month must allocate it to the member within 28 days after the end of that month, or a longer period that is reasonable in the circumstances. Money received in June can sit in the fund unallocated until 28 July. Under the ATO's determination TD 2013/22, a contribution made in one financial year but allocated with effect from a date in the next counts towards the member's concessional cap in the year of allocation, and is not also counted in the year it was made.

The deduction runs on a different clock. The ATO's own form page puts it plainly: the arrangement lets the contribution be recognised for income tax deductibility in year 1 while it is not counted towards the concessional cap until year 2. A personal contribution paid in June is deductible in that June's financial year, provided the member gives the fund a valid notice of intent under section 290-170 and the fund acknowledges it.

Put the three together. In June the member makes their normal concessional contribution, allocated straight away and counted against the current year's cap. Then they make a second contribution, which the fund receives in June but holds unallocated and allocates after 1 July. Both are deductible in the June year. Only the first counts against that year's cap; the reserved second counts against the following year's. One return, close to two caps of deduction, no excess in either year on the numbers themselves.

Why the reserve is an SMSF feature

Since 1 July 2026 the regulations draw the line explicitly. Regulation 7.07G requires a fund other than an SMSF to allocate a contribution to the member as soon as practicable and in any case no later than 3 business days after receiving it, or refund it. There is no window in which money sits in a large fund outside the member's balance, so there is nothing to hold in reserve. Regulation 7.07H gives an SMSF trustee the 28 days. An SMSF can hold a contribution in an unallocated contributions account because the trustee controls the allocation timing within that limit, and that timing control is what makes the arrangement possible.

One change from December 2024 is worth knowing because it sounds as if it affects this and does not. From 7 December 2024 the legacy retirement product regulations moved most allocations from reserves so that they count towards the non-concessional cap rather than the concessional cap. The ATO's page on those changes states that they make no change to the treatment of allocations of assessable contributions, which continue to count towards the concessional cap. A June contribution allocated in July is an assessable contribution. TD 2013/22 still governs it.

The form, and when the ATO says to lodge it

Here is the part that decides whether the arrangement holds in practice. The SMSF annual return must report a contribution in the year the fund received it. So the fund's own return for the June year shows both contributions, and on that data alone the member looks to have exceeded the cap. The form built for exactly this is NAT 74851, Request to adjust concessional contributions. It tells the ATO which amount was made in year 1 but allocated in year 2, and the ATO reduces the member's year 1 concessional contributions by that amount and increases year 2 by the same amount.

The ATO's instruction on timing is specific. The form can be lodged any time after the contribution has been both made and allocated, and the ATO's stated position is to lodge it before, or at the same time as, both the fund's annual return and the member's own return, because doing so may avoid having to deal with incorrect assessments. It is lodged as a PDF through Online services for agents or Online services for business under the Superannuation topic, or by post. The ATO notes that leaving out the tax file number can lead to processing delays.

If a determination for excess concessional contributions arrives anyway, the ATO's own guidance splits the response in two. Where the ATO relied on incorrect information, the fix is to get the information corrected, which for a reserved contribution means the form. Where the ATO applied the law incorrectly, the route is an objection to the assessment or determination. The ATO says an amended notice can take up to 6 weeks to arrive. Practitioners at industry events in May and September 2026 reported that excess determinations were still issuing on reserved contributions and that the form was slow to be processed; those are practitioner accounts, not ATO statements, and the ATO has published no processing timeframe for the form.

The reason the determination matters is what an unreleased excess does next. Excess concessional contributions are added to the member's assessable income, and any excess not released from the fund counts towards the non-concessional cap. The release election is made through ATO online services within 60 days of the determination, and releasing 85 per cent of the excess is what keeps it out of the non-concessional count. We set out how the non-concessional cap and its bring-forward tiers move at smsfcore.com/blog/bring-forward-tiers-fy2026-27, because that is the cap an unresolved excess spills into.

The conditions that all have to hold

The arrangement fails quietly if any part of it is loose. The ATO lists the records it expects: a trustee resolution in year 1, made under the fund's governing rules, not to allocate the contribution when made but to accept it into a reserve; evidence the fund received the contribution; a trustee resolution to allocate it from the reserve in year 2; and the notice of intent and the fund's acknowledgment for any personal deductible contribution. The deed has to permit deferred allocation in the first place.

The notice of intent under section 290-170 has to reach the fund on or before the day the member lodges their return, or the end of the next income year, whichever comes first, and the fund has to acknowledge it before the deduction is claimed. Once the fund has started an income stream based on the contribution, the notice can no longer be given. The fund has to actually allocate the reserved amount within the 28 days and record that allocation, not merely intend to. The member has to have cap room in the following year for the reserved amount, or it becomes an excess in that year instead of a saving. And the form cannot be used for non-concessional contributions; it covers concessional contributions made from 1 July 2014 onwards.

The wider caps position sits behind all of it. A member who has already used the current year's cap in full has no room to add a normal June contribution on top, and carried-forward unused cap from earlier years interacts with the timing. We set the carry-forward mechanics and the $500,000 total-super-balance gate out at smsfcore.com/blog/carry-forward-concessional-cap-fy2026-27.

What a caps tracker records

SMSF Core's caps tracker records each member's concessional position across the year, including a contribution marked as reserved and the year its allocation counts against. It keeps the deduction year and the cap year as two separate columns, because they answer two separate questions, and it holds the allocation date and the minute reference next to the figure, so the evidence is already assembled if a determination arrives. Every number cites the ATO source it came from, and nothing in the tracker is a determination or a replacement for one. There is a sample fund at app.smsfcore.com/demo if you want to see it with data already in it.

SMSF Core is an information tool, not a licensed financial service. Talk to a licensed adviser or your accountant before acting.