When you work for someone else, superannuation mostly takes care of itself: your employer must pay 12% of your ordinary time earnings into your fund. When you work for yourself, nobody pays it for you — and the statistics show many self-employed Australians reach their fifties with far less super than employees on similar incomes. The good news is that the tax system gives you a powerful tool to close the gap: personal deductible super contributions. Done properly, they cut this year’s tax bill and build your retirement balance at the same time.
This guide covers how self-employed super works, the caps that apply, the notice-of-intent step most people miss, and a worked example. To model contributions against your income, use the super calculator.
The gap: no super guarantee on your own income
The superannuation guarantee (SG) only applies to employees. If you are a sole trader, a partner in a partnership, or a freelancer operating as an individual, your clients have no obligation to pay super on what they pay you — with one exception: if you are engaged mainly for your labour under a contract that is principally for your personal work, you may be treated as an employee for SG purposes, and the payer must contribute. Genuine independent contractors fall outside SG entirely.
Company directors are in a different position again: a company can pay super contributions for its directors as employees, and those contributions are deductible to the company within the same caps described below.
The practical consequence for sole traders is stark. An employee earning $100,000 receives $12,000 a year in employer super. A sole trader earning the same $100,000 receives nothing unless they contribute voluntarily. Replicating the 12% rate yourself — $12,000 on $100,000 of business income — is a sensible starting benchmark.
How personal deductible contributions work
Since 2017–18, almost any working Australian can claim a tax deduction for personal super contributions, whether employed, self-employed, or a mix. The mechanics are straightforward:
- You transfer money from your own after-tax income into a complying super fund.
- You lodge a notice of intent to claim a deduction with the fund, and the fund acknowledges it in writing.
- You claim the deduction in your tax return for that financial year.
The contribution is then taxed at 15% inside the fund — the contributions tax — instead of at your marginal rate. If your marginal rate is 30% plus the 2% Medicare levy, the net tax saving on each contributed dollar is 17 cents (32% minus 15%). At the 45% top rate, the saving is 32 cents in the dollar.
There are conditions. You must be under 75, and if you are aged 67 to 74 you generally need to meet the work test (40 hours of gainful work in a 30-day period) or qualify for the work test exemption. The contribution must be received by the fund before 30 June to count for that financial year, and the fund must still hold the contribution when you lodge the notice.
The caps: $30,000 concessional in 2025–26
Deductible personal contributions count toward your concessional contributions cap, which also includes any employer SG and salary sacrifice contributions. For 2025–26 the cap is $30,000, rising to $32,500 from 1 July 2026. Amounts above the cap are taxed at your marginal rate, with an interest charge — so staying inside the cap matters.
| Cap (2025–26) | Amount | Notes |
|---|---|---|
| Concessional contributions cap | $30,000 | Includes SG, salary sacrifice and deductible personal contributions; rises to $32,500 in 2026–27 |
| Non-concessional contributions cap | $120,000 | After-tax contributions you do not claim as a deduction; rises to $130,000 in 2026–27 |
| Carry-forward concessional cap | Up to 5 years of unused cap | Available if your total super balance was under $500,000 at the previous 30 June |
The carry-forward rule is especially valuable for self-employed people with lumpy income. If you used only $10,000 of your $30,000 cap in a quiet year, the unused $20,000 carries forward for up to five years. In a bumper year you can contribute the current year’s cap plus accumulated unused amounts and claim the lot, subject to your total super balance being under $500,000 at the previous 30 June. Check your available carry-forward amount in ATO Online Services via myGov before contributing.
Worked example: $15,000 contribution on $90,000 of income
Consider a sole trader with $90,000 of taxable business income in 2025–26 and no other super contributions. She contributes $15,000 to her fund and claims it as a deduction:
| Without contribution | With $15,000 contribution | |
|---|---|---|
| Taxable income | $90,000 | $75,000 |
| Income tax (2025–26 resident rates) | $17,788 | $13,288 |
| Medicare levy (2%) | $1,800 | $1,500 |
| Contributions tax in fund (15%) | — | $2,250 |
| Total tax | $19,588 | $17,038 |
| Net tax saving | $2,550 |
The $15,000 now sits in super, invested for retirement, and the contribution cost $2,550 less in total tax than taking the money as income. The deduction cannot reduce taxable income below zero, and it cannot create or increase a tax loss — so size the contribution to your actual taxable income.
Tax check on the table: on $90,000, tax is $4,288 on income to $45,000 plus 30% of the $45,000 above it ($13,500), totalling $17,788. On $75,000, tax is $4,288 plus 30% of $30,000 ($9,000), totalling $13,288. Medicare levy is 2% of taxable income in each case.
The step most people miss: the notice of intent
Making the contribution is not enough. You must formally notify your fund that you intend to claim a deduction, and the fund must acknowledge the notice in writing before you lodge your tax return (or by 30 June of the following financial year, whichever comes first). Without a valid, acknowledged notice, the contribution is treated as non-concessional — after-tax money you cannot deduct — and the tax saving is lost.
Three traps catch people every year:
- Rolling over or withdrawing first: if you roll your super into another fund or withdraw it before the notice is acknowledged, you may no longer be able to claim the deduction on that contribution.
- Lodging the return first: lodging your tax return before the notice is acknowledged locks in the non-deductible treatment.
- Claiming more than the acknowledged amount: you can only claim up to the amount your fund acknowledged.
The sequence is therefore: contribute, lodge the notice, receive the acknowledgment, then lodge your return. Most funds provide the notice form (NAT 71121) online, and the process usually takes only a few days.
Building a habit: how much and how often
Because self-employed income is irregular, a fixed monthly contribution often fails. Better approaches include:
- A percentage rule: transfer 12% of every client payment received into a separate account, then sweep it into super quarterly. This mirrors the SG rate employees receive.
- Quarterly contributions: contribute each quarter once your income for the period is known, keeping the total within the concessional cap.
- A June true-up: in May or June, estimate your full-year taxable income and make a final contribution to use the remaining cap — but leave enough time for the fund to receive it before 30 June and for the notice to be acknowledged.
Contributions are preserved in super until you meet a condition of release, generally reaching preservation age (60) and retiring. That lock-up is the price of the tax saving, so keep an emergency buffer outside super and do not contribute money you may need before retirement.
Frequently asked questions
Do self-employed Australians have to pay super?
No. There is no legal requirement for a sole trader to contribute to their own super. But without voluntary contributions, your retirement balance will not grow, and you miss out on the tax deduction described above.
What is the concessional cap for 2025–26?
$30,000, including any employer SG, salary sacrifice and deductible personal contributions. It rises to $32,500 from 1 July 2026. Unused amounts can be carried forward for up to five years if your total super balance was under $500,000 at the previous 30 June.
Can I claim a deduction if I am over 65?
Yes, up to age 75. If you are aged 67 to 74, you generally need to meet the work test or qualify for the work test exemption to claim the deduction.
What happens if I forget the notice of intent?
The contribution is treated as non-concessional. You lose the deduction for that year, although the money stays in super. You cannot fix it retrospectively after lodging your return, so lodge the notice before your return.
Does my client have to pay super for me as a contractor?
Only if you are engaged under a contract that is wholly or principally for your labour and you are treated as an employee for SG purposes. A genuine independent contractor engaged for a result is not covered by SG.
Can I contribute more than the concessional cap?
Yes, but the excess counts toward the non-concessional cap ($120,000 in 2025–26) and the concessional excess is taxed at your marginal rate with an interest charge. Check your cap position in myGov before contributing large amounts.
Conclusion
Self-employed super is entirely in your hands — which is both the risk and the opportunity. A regular contribution habit, sized to the concessional cap and claimed with a valid notice of intent, delivers an immediate tax saving and a retirement balance that employees get by default. Start with the 12% benchmark if you can, use the carry-forward rules in strong years, and never lodge your tax return before your fund has acknowledged your notice. To test contribution amounts against your income, try the super calculator.