Super salary sacrifice limit explained: how it affects your gross pay and tax

What is the super salary sacrifice limit?

The super salary sacrifice limit is the maximum amount of before-tax pay you can choose to contribute to your super fund each year. It's also called the concessional contributions cap. This limit is set by the Australian Tax Office and applies to contributions made from your salary before income tax is deducted. The exact figure for 2026–27 is not included in our reference, but it's a key number for anyone looking to boost their retirement savings while reducing their taxable income.

Salary sacrifice is an arrangement with your employer where you agree to forgo part of your gross pay in exchange for extra super contributions. Those contributions are taxed at 15% inside your super fund, which is usually lower than your marginal tax rate. The cap ensures that the tax concession is limited. If you exceed the cap, the excess is taxed at your marginal rate plus an additional charge.

How the limit affects your gross pay and tax

Your gross pay is your total earnings before any deductions. When you salary sacrifice into super, that amount is deducted from your gross pay before tax is calculated. This lowers your taxable income, which can move you into a lower tax bracket. For example, if you earn at the national line of $108,352 per year (index 100), your marginal tax rate is 30% plus 2% Medicare levy. By sacrificing part of your salary up to the concessional cap, you reduce the portion of income taxed at 30%.

Using the 2026–27 tax brackets from our reference: income up to $18,200 is tax-free; from $18,201 to $45,000 is taxed at 15%; from $45,001 to $135,000 at 30%; and so on. If you sacrifice $30,000 (assuming that's the cap), your taxable income drops to $78,352. The tax on that amount would be roughly $15,000 less than on $108,352, depending on your exact situation. The Medicare levy also reduces because it's 2% of taxable income.

But remember: your take-home pay is your cash salary after tax, not including the super contributions. Your employer pays the sacrificed amount directly into your super fund. So your bank account sees less cash, but your super balance grows. The net effect on your lifestyle depends on your cash flow needs.

Where the limit sits on the salary index

The Salary Index measures gross full-time adult ordinary-time earnings, with 100 equal to $108,352 per year. The super salary sacrifice limit is not a pay figure, so it doesn't have its own index number. However, it interacts with the index because it determines how much of your indexed earnings you can redirect to super. For someone earning at index 100, the cap (if around $30,000) represents about 28% of their gross pay. For someone on the national minimum wage (index 48.2, $52,255 per year), the cap is a much larger proportion of their income, but they may not have room to sacrifice that much after living expenses.

How the index works is based on gross ordinary-time earnings, not after-tax or after-sacrifice amounts. So when you compare your pay to the index, you're looking at your full gross salary before any salary sacrifice. The index helps you see where your gross pay sits relative to the national average. If you salary sacrifice, your gross pay for index purposes remains the same, but your taxable income changes.

State and industry differences

Your ability to use the super salary sacrifice limit depends on your pay level, which varies by state and industry. According to our reference, the highest-paying state is the ACT (index 109.9, $119,090 per year) and the lowest is Tasmania (index 88.6, $96,008). In high-paying states like WA (index 106.9, $115,825) or the ACT, more people earn enough to fully use the concessional cap. In lower-paying states, the cap may be less relevant if earnings are below it.

Industry also matters. Mining has the highest index at 154.7, meaning average gross pay of about $167,600 per year. Workers in mining can easily sacrifice up to the cap and still have high cash income. In contrast, accommodation and food services (index 72.5, about $78,600 per year) have less room to sacrifice without affecting living standards. Pay guides and industry pages can help you see typical pay in your field.

Tax and super considerations

The super guarantee (SG) is 12% from 1 July 2026, with a maximum contribution base of $270,830. Your employer pays SG on your ordinary-time earnings, which is your salary after any salary sacrifice arrangement. So if you sacrifice $30,000, your SG is calculated on the reduced cash salary. That means your total super contributions (SG plus salary sacrifice) could be less than if you didn't sacrifice, depending on your pay. However, the total cannot exceed the concessional cap without penalty.

Resident tax rates for 2026–27 include a 2% Medicare levy. Salary sacrifice reduces your Medicare levy because it's based on taxable income. But be aware that the Medicare levy surcharge (for high earners without private hospital cover) and HELP repayments are not affected by salary sacrifice in the same way. Our reference does not cover those, so you should check your individual situation.

Key takeaways

• The super salary sacrifice limit is the annual cap on before-tax super contributions. It's set by the ATO and not included in our reference.
• Sacrificing up to the cap reduces your taxable income, saving you tax at your marginal rate.
• Your gross pay (as measured by the salary index) stays the same, but your cash take-home decreases.
• State and industry pay levels affect how much you can realistically sacrifice.
• Always consider the impact on your super guarantee and total super contributions.

For more details on how pay compares across Australia, see the states page or topics for related guides.