Does Salary Sacrifice Still Help on a $300,000 Salary in Australia? (2025-26)
Last reviewed:
Primary tax-year context: 2025-26
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General information only. This is not tax or financial advice.
If your salary is $300,000, salary sacrifice can still reduce your taxable income. But at this income level, the simple story of “pay 15% in super instead of your marginal rate” is not the full answer.
The two constraints that matter most are:
- the concessional contributions cap
- Division 293 tax once your income and concessional contributions for Division 293 purposes exceed $250,000
Why the answer is still usually “yes, but”
The ATO says salary sacrifice super contributions are concessional contributions and are generally taxed in the fund at 15%. It also says the sacrificed amount is not assessable salary and wages for PAYG purposes.
So at a high level, salary sacrifice can still improve the tax result on a $300,000 salary.
But the benefit is narrower if you forget the next two checks.
First limit: the concessional contributions cap
From 1 July 2024, the general concessional contributions cap is $30,000.
That cap includes:
- employer super guarantee contributions
- salary sacrifice contributions
- deductible personal super contributions
So if you are on $300,000, the practical mistake is not “salary sacrifice does nothing”. The practical mistake is thinking the whole sacrificed amount gets concessional treatment without checking how much cap space is already used.
Second limit: Division 293 tax
The ATO says Division 293 tax applies when your income plus certain super contributions exceed $250,000. The extra tax is 15% on the excess over the threshold or on the taxable super contributions, whichever is less.
At a $300,000 salary, many employees are already in the Division 293 zone before adding much extra complexity.
That does not mean salary sacrifice stops working. It means the super tax concession is reduced compared with someone below the threshold.
What this means in practice at $300,000
For a $300,000 salary, the useful question is usually not “should I salary sacrifice, yes or no?”
It is:
- how much concessional cap space is left after employer super
- whether the sacrifice will trigger or deepen Division 293 tax
- whether the cashflow trade-off still works after those limits
That is why a high-income super decision should be modelled, not guessed from a generic rule.
The practical order to check it
Use the pages in this order:
- Tax on $300,000 income in 2025-26 if you want the current-year benchmark tax answer first
- Salary Sacrifice Calculator if you want to test the effect of concessional contributions on take-home pay
- Income Tax Calculator if the real decision includes other income, deductions, HELP, or broader cashflow changes
Sources
Next step
If your query is really “does salary sacrifice still help when I earn $300,000?”, the answer is usually yes in principle, but only after you account for cap space, Division 293, and the cashflow hit you are willing to accept.