Salary sacrifice, explained
How trading some of your pre-tax salary into super can cut your tax bill in 2026-27 — the savings, the caps, and the traps most guides skip.
By Borja Pérez · Updated September 2026 · Figures are FY 2026-27
Salary sacrifice is one of the few genuinely simple tax strategies available to ordinary employees in Australia — and one of the most misunderstood. At its core it’s an arrangement with your employer to take part of your pay before tax and direct it somewhere else, most commonly into your superannuation. Because that money is taxed at a flat 15% inside super instead of at your marginal income tax rate, it can leave you meaningfully better off — as long as you understand the caps and the trade-offs.
This guide explains how it works for the 2026-27 financial year, with a worked example, and flags the two things people most often get wrong: the contributions cap and the HECS trap. You can model any sacrifice amount in our take-home pay calculator — it has a salary-sacrifice field built in.
What salary sacrifice actually is
A salary sacrifice arrangement is an agreement, made with your employer before you earn the income, to forgo part of your salary in return for a benefit of similar value. The classic version is extra super contributions, but it can also cover a novated lease on a car, or work-related items like a laptop or phone. The common thread is that the amount comes out of your pre-tax salary, lowering your taxable income.
This guide focuses on the most common and most useful form: sacrificing into super. (Note that from 2020 the tax office closed a loophole — sacrificed amounts can no longer reduce the super your employer is legally required to pay you, so your 12% guarantee is safe on top.)
Why it saves tax: 15% vs your marginal rate
Money you take as salary is taxed at your marginal rate — up to 45% plus the 2% Medicare levy. Money you salary sacrifice into super is instead taxed at a flat 15% contributions tax when it enters the fund. The saving is simply the gap between those two numbers. The higher your marginal rate, the bigger the gap — which is why salary sacrifice is most powerful for middle and higher earners.
A worked example: sacrificing $10,000
Say you earn $100,000 as a resident. Your marginal rate is 30% plus the 2% Medicare levy, so every dollar at the top of your income is taxed at 32%. Now compare what happens to a $10,000 slice of that salary:
| $10,000 of salary | Taken as cash | Sacrificed to super |
|---|---|---|
| Tax on it | $3,200 (32%) | $1,500 (15%) |
| What you end up with | $6,800 in your bank | $8,500 in super |
You’ve turned $6,800 of spendable cash into $8,500 working for your retirement — an extra $1,700, which is the 17-percentage-point gap between your 32% marginal rate and the 15% contributions tax. (Because sacrificing also trims the income your Medicare levy is worked out on, the real gain is usually a touch larger.)
The catch: that $8,500 is now in super, not your pocket. Salary sacrifice doesn’t make you richer today — it moves money from “now” to “retirement” and shaves the tax off on the way. Only sacrifice what you genuinely don’t need to live on.
The concessional cap: $32,500
You can’t sacrifice unlimited amounts at the 15% rate. Before-tax contributions are capped. For 2026-27 the concessional contributions cap is $32,500 (up from $30,000). Crucially, this cap includes everything that goes into super before tax:
- the 12% super guarantee your employer already pays;
- anything you salary sacrifice;
- any personal contributions you later claim a tax deduction for.
So if your employer is already putting in, say, $14,400 (12% of a $120,000 salary), you have roughly $18,000 of room left to sacrifice before you hit the cap. Go over it and the excess is added back to your income and taxed at your marginal rate (with a 15% offset for the tax already paid), so it’s worth staying inside it.
Carry-forward: if your total super balance was under $500,000 at the end of the previous year, you can use up unused cap amounts from the past five years — handy if you have a one-off high-income year or a lump sum to contribute.
Division 293: high earners lose half the benefit
If your income plus your concessional contributions exceeds $250,000, an extra 15% tax — called Division 293 — applies to those contributions. That lifts the tax on sacrificed money from 15% to 30%. It’s still below the 47% top marginal rate, so sacrifice can remain worthwhile, but the advantage is roughly halved. The ATO assesses and bills this separately, so it won’t show up in your normal take-home figure.
The HECS trap most people miss
Here’s the one that catches people out. You might think sacrificing salary to drop your taxable income below a HECS-HELP threshold would reduce your student loan repayment. It doesn’t. When the ATO works out your HECS-HELP repayment income, it adds your reportable super contributions — including salary sacrifice — straight back on. So salary sacrifice lowers your income tax but leaves your compulsory student loan repayment untouched. We explain this in full on the HECS-HELP repayment page.
Is it worth it for you?
Salary sacrifice into super tends to make most sense if your marginal rate is comfortably above 15% (so, taxable income above $45,000), you won’t need the money before retirement, and you have cap room to spare. It makes less sense if money is tight day-to-day, if you’re close to a home deposit you’ll need soon, or if you’re already near the concessional cap. Because it locks money away for decades and interacts with your own circumstances, it’s a sensible thing to run past a licensed financial adviser before committing.
Frequently asked questions
How much tax does it actually save?
Roughly the gap between your marginal rate and the 15% contributions tax. On a 32% marginal rate, sacrificing $10,000 saves about $1,700 and puts $8,500 into super instead of $6,800 in your bank.
What’s the cap for 2026-27?
$32,500 for concessional (before-tax) contributions, which includes your employer’s super guarantee. Unused cap from the past five years can sometimes be carried forward if your total super balance is under $500,000.
Will it lower my HECS repayment?
No. Reportable super contributions are added back to work out your HECS-HELP repayment income, so salary sacrifice cuts your income tax but not your student loan repayment.
Can I get the money back if I need it?
Generally not until you reach preservation age and retire. Super is locked away by design — that long-term lock is the price of the tax break.
This guide is general information about the 2026-27 rules, not personal financial or tax advice. Contribution caps and thresholds are set by the ATO and indexed over time. Because salary sacrifice locks money away and depends on your personal circumstances, consider speaking to a licensed financial adviser or registered tax agent before acting. Full workings for our figures are on the methodology page.