If you're looking to put more of your pre-tax income into superannuation, there are two common strategies to consider: salary sacrificing through your employer or making a personal contribution and claiming a tax deduction.
Both can result in a concessional contribution to super, meaning the contribution is generally taxed in your super fund at 15%, rather than being taxed at your marginal income tax rate.
So, if the destination is the same, does it matter which path you take?
Yes.
The better option can depend on your employer, cash flow, timing, income, contribution limits and how much flexibility you need.
And in 2026, there is another important number to know.
The $32,500 concessional contributions cap
From 1 July 2026, the general concessional contributions cap is $32,500. This is the maximum amount of concessional contributions you can generally make in a financial year before excess contribution rules may apply.
Concessional contributions include:
- employer superannuation contributions
- salary sacrifice contributions
- personal contributions for which you claim a tax deduction.
Crucially, they are all counted together.
For example, if your employer contributes $12,000 in compulsory and other employer super contributions during the year and you salary sacrifice another $15,000, you've already used $27,000 of your $32,500 concessional cap.
You don't get a separate $32,500 allowance for salary sacrifice and another $32,500 for personal deductible contributions.
It's one combined cap.
This is one of the easiest mistakes to make when planning additional super contributions.
Option 1: Salary sacrifice
Salary sacrifice means you arrange with your employer to give up part of your future salary or wages in exchange for an additional contribution to your super fund.
For example, instead of receiving an additional $10,000 as salary, you might arrange for your employer to contribute that amount to your super.
The contribution is generally treated as a concessional contribution and taxed in the fund at 15%.
Why salary sacrifice can work well
The biggest advantage is simplicity.
Once your arrangement is established with your employer, contributions can be made automatically from your pay.
This can make salary sacrifice particularly useful if you want to build your super progressively throughout the year rather than finding a large amount of cash at tax time.
It can also reduce the amount of salary subject to your personal income tax.
However, salary sacrifice arrangements need to be structured correctly. The timing of contributions matters because contributions generally count towards the cap in the financial year in which the super fund receives them.
Option 2: Personal deductible contributions
The alternative is to make an additional contribution to your super personally — for example, by transferring money from your bank account — and then claim an eligible amount as a tax deduction in your tax return.
This can be useful if your income isn't consistent throughout the year or you receive a bonus, investment income or another lump sum and want to decide later how much to contribute to super.
But there is an important administrative step.
To claim a deduction for a personal super contribution, you generally need to provide your super fund with a valid notice of intent to claim a deduction and receive an acknowledgement from the fund before claiming the deduction in your tax return.
Missing this step can mean your intended tax deduction isn't available.
So which one is better?
There isn't one answer for everyone.
Salary sacrifice may suit you if:
- you receive regular employment income
- you want contributions to happen automatically
- you want to spread contributions throughout the year
- you prefer not to have to find a lump sum later
- your employer offers a straightforward salary sacrifice arrangement.
Personal deductible contributions may suit you if:
- your income varies during the year
- you receive a bonus or other lump sum
- you're self-employed or don't have access to salary sacrifice
- you want to decide later how much of your available cash to contribute
- you want greater control over the timing of an additional contribution.
The tax outcome can be broadly similar when the contributions are within the relevant rules.
The flexibility and cash-flow implications can be very different.
Don't forget your employer super
One of the most important calculations is working out how much of your concessional cap is already being used.
Your compulsory employer contributions count towards the same concessional contributions cap as salary sacrifice and personal deductible contributions.
For example:
- Employer contributions: $13,000
- Salary sacrifice: $10,000
- Personal deductible contribution: $9,500
- Total concessional contributions: $32,500
In this example, the entire 2026–27 general concessional cap has been used.
This is why simply deciding to "put another $10,000 into super" without checking your existing contributions can create an unexpected tax issue.
If you have more than one employer or more than one super fund, contributions across your funds are generally added together for cap purposes.
What about unused concessional cap amounts?
The $32,500 figure isn't necessarily the absolute limit available to everyone.
If you meet the relevant conditions, you may be able to use unused concessional contributions cap amounts from previous financial years.
One key requirement is that your total superannuation balance was less than $500,000 at 30 June of the previous financial year. Unused amounts can generally be carried forward for up to five years.
This can create an opportunity for someone who has had several years of relatively low contributions to make a larger concessional contribution in a later year.
However, the calculation can become complicated quickly, particularly if you have multiple employers, multiple funds or irregular contribution timing.
Your available cap can be checked through your ATO online services.
What about higher-income earners?
There's another rule worth knowing if your income is higher.
If your income and concessional contributions exceed the relevant threshold, you may have to pay Division 293 tax.
The ATO currently identifies $250,000 as the relevant threshold for Division 293 purposes.
This doesn't necessarily mean salary sacrifice or personal deductible contributions are a bad strategy.
It simply means the tax benefit needs to be considered in the context of your overall circumstances.
The biggest mistake isn't choosing the "wrong" method
For many people, the biggest mistake isn't choosing salary sacrifice over a personal contribution — or vice versa.
It's making the contribution without understanding the numbers first.
Before contributing, consider:
- How much is my employer already contributing?
- How much concessional cap space do I have available?
- Do I have unused cap amounts from previous years?
- Will my income make Division 293 tax relevant?
- When will the contribution actually reach my super fund?
- Can I comfortably afford to lock this money away in super?
That last question matters.
Superannuation is designed primarily for retirement and access is subject to conditions of release. A tax-effective contribution isn't necessarily the right decision if it leaves you without enough accessible cash to meet your short-term needs.
The bottom line
Salary sacrifice and personal deductible contributions can both be effective ways of increasing your super while potentially receiving concessional tax treatment.
Salary sacrifice generally wins on automation and regular cash flow.
Personal deductible contributions can win on flexibility and timing.
Neither is automatically better.
The right choice depends on your employment arrangements, income, existing employer contributions, available concessional cap space and broader financial goals.
And for the 2026–27 financial year, remember the headline number: the general concessional contributions cap is $32,500, but your actual available cap may be different if you have unused concessional cap amounts or other circumstances that affect your position.
A few minutes spent checking the numbers before contributing can help ensure your strategy is working with Australia's superannuation and tax rules — rather than accidentally running into them.
General information only. This article provides general information only and does not take into account your personal circumstances. Tax and superannuation laws can change, and additional rules may apply depending on your income, employment arrangements and superannuation balance. Consider obtaining professional financial and tax advice before making contribution or salary sacrifice decisions.