Catch-up super contributions let some Australians put more than the standard yearly limit into super at the concessional (15%) tax rate, by using cap space they did not use in earlier years. With tax returns due by 31 October, plenty of people are weighing up a lump sum top up right now. If a car loan is also on your list this year, it is worth understanding how the two decisions interact before you move any money.
The short answer: a catch-up contribution can lower your tax, but it also takes cash out of your bank account, locks it away until retirement, and (for personal deductible contributions) lowers the taxable income shown on your tax return. Lenders look at your savings, your bank statements and, for many self-employed applicants, your tax returns. So the timing and size of a catch-up contribution can change how your car loan application reads.
How catch-up super contributions work in 2026-27
The ATO calls this "carrying forward unused concessional contributions cap amounts". The key figures, checked against the ATO this morning, are:
- The general concessional cap is $32,500 from 1 July 2026. It was $30,000 from 1 July 2024 to 30 June 2026, and $27,500 a year from 1 July 2021 to 30 June 2024.
- You need a total super balance under $500,000 at 30 June of the previous financial year to use carried forward amounts.
- Unused amounts last five years, then expire. The ATO's own example: a 2020-21 unused amount not used by the end of 2025-26 has expired. For 2026-27, that leaves unused amounts from 2021-22 through to 2025-26.
- The oldest unused amounts are used first, and they are applied automatically once you go over the general cap in a year.
- Concessional contributions include employer super guarantee, salary sacrifice and personal contributions you claim as a tax deduction. They are taxed at 15% inside the fund.
You can see your available carry forward amounts in ATO online services through myGov, under Super, then Information, then Carry forward concessional contributions. That figure is the one to check before you contribute, because contributions count in the year the fund receives them and employer payments can land later than you expect.
Two ways to make a catch-up contribution
Employees can increase a salary sacrifice arrangement with their employer, which sends more pre-tax pay to super and reduces take home pay. Anyone eligible, including the self-employed, can instead make a personal contribution from their own money and then claim a tax deduction for it.
The deduction route has a strict paperwork step. According to the ATO, you must give your fund a notice of intent to claim in the approved form and receive the fund's acknowledgment. The notice must reach your fund by whichever comes first: the day you lodge your tax return for that year, or the end of the following financial year. Lodge your return first and you can lose the deduction.
How a big contribution shows up when you apply for a car loan
Car lenders do not see your super balance as money you can use, and for good reason. Super is generally preserved until you reach your preservation age (60 for anyone born after 30 June 1964) and retire, or turn 65. A dollar moved into super is a dollar that no longer counts as savings in your bank account.
That matters in three places on a car loan application:
- Bank statements. Lenders read recent statements for savings behaviour, spending and buffers. A large transfer out to a super fund leaves a lower closing balance. It is easy to explain, but it still shrinks the cash you can show. Our guide to what lenders check on your bank statements covers what they look for.
- Deposit. If you planned to put money down on the car, the same cash cannot also go into super. A deposit can lower the amount you borrow and your repayments; see how much deposit you need for a car loan.
- Assessed income. For employees, a larger salary sacrifice lowers the take home pay on your payslips, and lenders generally assess the pay that actually lands. For self-employed borrowers assessed on tax returns, a personal super deduction lowers taxable income. Some lenders may look at how the figure was reached, but you should not assume it, so ask before you apply.
Self-employed borrowers: the tax return trade-off
This is where catch-up contributions bite hardest for borrowers. A sole trader with a strong year might use a large deductible contribution to reduce tax, then apply for a vehicle loan a few months later using that same tax return and notice of assessment. The lower taxable income can reduce the income a lender works from, and so reduce borrowing power, even though the business itself earned more.
If you are self-employed and planning finance, it can help to work out the vehicle purchase and the super contribution together with your accountant and broker, rather than one after the other. Our guide to low doc ABN car loans explains other ways lenders may verify self-employed income, and our article on why your 31 October tax return matters for your car loan covers the timing of lodging.
What happens if you go over the cap
The ATO says excess concessional contributions are included in your assessable income and taxed at your marginal rate, less a 15% tax offset for the contributions tax already paid by the fund. Higher earners should also note Division 293 tax, which can apply when combined income and concessional contributions are more than $250,000. A surprise tax bill is not something you want to be paying alongside new car repayments, so check your carry forward balance and your employer's payment timing first.
A simple order of operations if you are doing both
There is no single right answer, and this is general information rather than advice. Many people find it useful to think in this order:
- Decide what the car will cost all up, including on road costs, insurance and running costs, and test repayments on our car loan repayment calculators.
- Check current pricing on the car loan rates page and compare lenders on comparison rate, not just headline rate.
- Work out how much cash you need to keep for a deposit and a buffer after settlement.
- Then size any catch-up contribution from what is genuinely left over, with an eye on the notice of intent deadline.
- If you already have a car loan, a cheaper loan can free up cash flow for super later. See whether refinancing your car loan could lower your repayments.
For a wider look at how super fits with borrowing, read our super in 2026 borrowers guide and whether you can use your super to buy a car.
Key points
- The concessional cap is $32,500 from 1 July 2026, and unused amounts from the last five years may be carried forward if your total super balance was under $500,000 at the previous 30 June.
- A personal deductible contribution needs a notice of intent, acknowledged by your fund, before you lodge your return.
- Money in super is generally locked away until retirement, so it no longer counts as savings or deposit for a car loan.
- For the self-employed, a large deduction can lower the taxable income a lender assesses.
- Plan the car purchase and the contribution together, and get personal advice from a licensed financial adviser or tax agent for your situation.
Sources: ATO concessional contributions cap, ATO personal super contributions, ATO when you can withdraw your super.
