Use Your 2020-21 Super Cap Before 30 June — It Vanishes

There is a $25,000 tax deduction sitting in your ATO record right now. You have 37 days to use it.

After 30 June 2026, it vanishes — and there is no mechanism, no extension, no hardship clause that can bring it back.

This is the carry-forward concessional contribution from the 2020-21 financial year. It has been silently rolling forward in your ATO file for five years. From 1 July 2026, the ATO drops it from your available cap — permanently. Most Australians don't know it exists.

This guide shows you how to check whether you have one, the exact dollar value at your marginal rate, and how to actually claim it before the cut-off.

Liam's Numbers — and Why This Matters in Plain English

Liam Park, 32, is a project manager in Brisbane earning $135,000. In 2020-21, he was earning $82,000 and his employer paid $7,790 in Super Guarantee contributions (9.5% rate at the time). He didn't salary sacrifice anything that year.

His unused concessional cap from 2020-21 = $25,000 − $7,790 = $17,210.

Five years later — today — that $17,210 is still sitting in his "carry-forward bank" at the ATO. It has been waiting. If Liam contributes an extra $17,210 to super as a personal deductible contribution before 30 June 2026, he gets:

• Tax deduction at his current 37% marginal rate: $6,368 in tax saved
• 15% contributions tax inside super: $2,582
• Net tax benefit this financial year: $3,786

Plus the $17,210 (less the $2,582 contributions tax) grows tax-advantaged inside super for the next 30+ years until preservation age. Compounded at a conservative 6% real return for 30 years, that single $14,628 net contribution is worth roughly $84,000 in today's dollars at retirement.

If Liam doesn't act before 30 June 2026, the $17,210 cap allowance expires. He cannot reclaim it. He cannot extend it. The $3,786 saving this year — and the $84,000 of retirement wealth it would have built — both evaporate.

The Rule, in 60 Seconds

The carry-forward concessional contributions rule was introduced in the 2018-19 financial year. It works like this:

• The annual concessional contributions cap for 2020-21 was $25,000 (it rose to $30,000 in 2024-25 and 2025-26, then $32,500 from 1 July 2026)
• If your total contributions for a year — employer SGC + salary sacrifice + personal deductible contributions — were below that year's cap, the unused portion rolls forward for up to 5 financial years
• After 5 years, the unused amount permanently expires
• The oldest unused amount is used first when you make a contribution in any later year
• You are only eligible to use carry-forward amounts if your total super balance at the prior 30 June was less than $500,000

The 5-year clock for the 2020-21 cap started on 1 July 2021. It runs out on 30 June 2026.

What the Tax Saving Looks Like at Each Income Level

The benefit scales directly with your marginal rate. Under the Stage 3 brackets in force since 1 July 2024 (verified vs ATO on 24 May 2026), the table below shows the tax saving from contributing an extra $17,210 (Liam's example carry-forward) and $25,000 (the maximum 2020-21 cap if you had zero contributions that year):

Saving = (marginal rate + Medicare − 15% contributions tax) × contribution amount. Source: ATO salary sacrificing super (ato.gov.au).

How to Actually Claim It — The Exact Sequence

Most Australians who know about carry-forward fail to use it because they don't realise it has to flow through a personal deductible contribution — not just a salary sacrifice arrangement. Here is the precise step-by-step:

Step 1 — Verify eligibility (today, 5 minutes)

• Log into myGov → ATO Online Services → Super → Carry-forward concessional contributions
• Confirm your 2020-21 unused amount (this is the bank)
• Confirm your total super balance at 30 June 2025 was under $500,000 (otherwise you can't use any carry-forward)

Step 2 — Make the personal contribution to your super fund

• Transfer the amount directly from your bank account to your super fund (not through payroll)
• The contribution must be received and processed by your super fund on or before 30 June 2026 — most funds need at least 5 business days, so target 20 June at the latest
• Many funds have BPAY details specifically for this — find them in your fund's member portal under "Make a contribution"

Step 3 — Lodge the s.290-170 notice with your super fund

• This is the form that converts the contribution from "non-concessional" (after-tax) into "concessional" (deductible)
• Without this notice, your fund treats the contribution as non-concessional and you get no tax deduction
• The notice can be lodged through most funds' online portals — must be lodged before you file your 2025-26 tax return AND before the earlier of 30 June 2027 or the year-end after you withdraw the contribution
• Recommended: lodge within 30 days of the contribution

Step 4 — Claim the deduction in your 2025-26 tax return

• The deduction appears at item D12 ("Personal superannuation contributions") of your individual tax return
• It will be the amount confirmed on the s.290-170 notice you lodged
• The ATO matches against your fund's reporting automatically — keep the acknowledgement notice from your fund

What If My Total Super Balance Is Over $500,000?

If your total super balance at 30 June 2025 was $500,000 or more, you are not eligible to use any carry-forward amounts this year. The cap is a hard rule. The $500,000 figure is not indexed. Your balance includes all super accounts you hold across all funds.

Two scenarios to check:

1. Are you very close to $500K? If your balance was, say, $510K at 30 June 2025, you cannot use carry-forward in 2025-26 — but you may be eligible again in a later year if your balance drops below $500K (rare for accumulation members) or you transfer to retirement phase. The 2020-21 cap still expires 30 June 2026 in either case.
2. Spouse contribution splitting is a separate mechanism — if you've split contributions to a lower-balance spouse historically, the carry-forward sits with you, not the spouse. Plan accordingly.

Why Most People Miss This

The 5-year clock started silently in 2018-19 when the rule was introduced. Most super funds don't proactively alert members. The ATO shows the figure in myGov but doesn't send notifications when amounts are about to expire. The result: tens of thousands of Australians let the 2018-19 cap expire on 30 June 2024 (the first wave). The 2019-20 cap expires 30 June 2025 (data due any week now on how many used it). The 2020-21 cap is the next domino.

For someone who started a higher-paying job in the last 2-3 years and had lower contributions earlier in their career, the unused 2020-21 amount can be the difference between a meaningful EOFY tax move and "wait, I missed it again". 37 days is enough to act — but it is not enough to delay.