Catch-Up Super Contributions Australia: How to Use Unused Concessional Caps
Australia's carry-forward concessional contribution rule is one of the most powerful and underused super strategies available. If your total super balance was under $500,000 on 30 June of the previous year, you can use unused concessional contribution caps from the past five financial years — contributing far more than the standard $30,000 annual cap in a single year. For someone who received a large bonus, sold a business, or simply had low-contribution years, this can generate a tax deduction worth $20,000–$100,000+.
How Carry-Forward Concessional Contributions Work
From 1 July 2018, the ATO began tracking unused concessional contribution caps on a rolling 5-year basis. Each year you contribute less than the annual concessional cap, the unused portion rolls forward and accumulates. You can then use accumulated unused caps in a future year — effectively making a much larger concessional (pre-tax, deductible) contribution than the standard annual limit allows.
Eligibility condition: Your total superannuation balance (TSB) on 30 June of the previous financial year must be less than $500,000. If your TSB has grown above $500,000, you lose access to carry-forward — even if you had large unused caps accumulated.
The carry-forward works on a first-in, first-out basis: the oldest unused cap is used first. Unused caps expire after 5 years.
Worked Example: Career Break and Catch-Up
| Financial Year | Annual Cap | Contributed | Unused Cap |
|---|---|---|---|
| 2021-22 | $27,500 | $10,500 | $17,000 |
| 2022-23 | $27,500 | $5,000 | $22,500 |
| 2023-24 | $27,500 | $5,500 | $22,000 |
| 2024-25 | $30,000 | $12,000 | $18,000 |
| 2025-26 | $30,000 | $14,500 | $15,500 |
| Total unused (as at 30 June 2026) | — | — | $95,000 |
In 2026-27, Emma can contribute up to $30,000 (current year cap) + $95,000 (carry-forward) = $125,000 in concessional contributions — all tax-deductible at her marginal rate minus 15% contributions tax in the fund.
At a marginal rate of 39% (income $135,001–$190,000), each dollar of concessional contribution costs 15 cents in super tax versus 39 cents in income tax — a saving of 24 cents per dollar. On $95,000 of catch-up contributions: tax saving of approximately $22,800.
Who Benefits Most From Carry-Forward Contributions?
People returning from parental leave or career breaks: Years of reduced or zero employer contributions leave large unused caps. A catch-up contribution on returning to full-time work can recover years of missed compounding.
Individuals with irregular income: Business owners, contractors, and commission-based workers may have had low-income years with minimal super contributions. A high-income year is the ideal time to use accumulated carry-forward caps.
Pre-retirees with under $500K in super: Those aged 55–65 who want to boost super before retirement and still have TSB under $500,000 can make large catch-up contributions to maximise their balance before the preservation age.
After a major asset sale: If you sell an investment property or business and receive a large capital sum, a carry-forward concessional contribution can reduce your taxable income significantly in that year — though the net CGT saving requires individual modelling.
How to Check Your Carry-Forward Balance
The ATO maintains real-time records of your unused concessional cap balances in myGov under the "Super" section. Log in at my.gov.au, link your myGov account to the ATO, and navigate to Super → Information → Carry-forward concessional contributions. Your available carry-forward amount is listed by financial year, showing when each portion expires.
Important: the ATO's figure reflects contributions reported to date. Your super fund may not have reported all contributions in real time — allow 2–3 months after year-end for figures to fully update.
Making the Contribution: Personal Deductible Contributions
To access carry-forward caps beyond what your employer contributes, you typically make a personal concessional contribution to your super fund and then lodge a Notice of Intent to Claim a Deduction form (ATO form NAT 71121) with your fund before lodging your tax return. Your fund acknowledges the notice, and the contribution becomes tax-deductible in that year.
The deduction reduces your taxable income dollar for dollar. The fund pays 15% contributions tax on the amount. Your net benefit is the difference between your marginal rate and 15%.
Frequently Asked Questions
- Does carry-forward affect non-concessional contributions?
- No. The carry-forward rule applies only to concessional (pre-tax) contributions. Non-concessional contribution caps have separate rules including the bring-forward arrangement (3 years' worth in one year) which is independent of carry-forward.
- What happens if I exceed the cap using carry-forward?
- If your total concessional contributions exceed the annual cap plus your available carry-forward balance, the excess is included in your assessable income at your marginal rate plus an excess concessional contributions charge. You can request to have 85% of the excess refunded from your super fund.
- Can I use carry-forward in the same year I sell an investment property?
- Yes, and this is one of the most powerful applications. A large capital gain in the year of a property sale increases your taxable income significantly. A carry-forward contribution reduces your taxable income, potentially moving you into a lower tax bracket and reducing the CGT payable. Get tax advice on the specific numbers before executing this strategy.
