Salary sacrificing into super lowers your taxable income. It does not lower the income figure the government uses to work out your family payments, your child support, your study loan repayment or your Medicare levy surcharge.
That gap is what reportable superannuation contributions exist to close. The amount you sacrificed gets added back, on its own line, so the tests that decide what you receive and what you owe see the money you diverted rather than just the money you took home.
It is not a penalty and it is not a reason to avoid salary sacrifice. But it is the single most common reason someone runs the numbers on a sacrifice arrangement, concludes they will be better off, and then finds out in August that they were not.
Two Things, Not One
"Reportable superannuation contributions" is an umbrella over two separate things, and keeping them apart makes everything downstream easier.
- Reportable employer superannuation contributions (RESC). Extra contributions your employer makes that you had some say over. Almost always salary sacrifice.
- Personal deductible contributions. Contributions you made from your own money and then claimed a deduction for.
They arrive at the same place by different routes. RESC is reported by your employer through Single Touch Payroll and appears on your income statement. Personal deductible contributions are reported by you, when you claim the deduction in your return.
What they have in common is the reason they exist. Both reduce your taxable income. Neither should let you appear poorer than you are when the government works out what you are entitled to.
What Makes a Contribution RESC
The usual case is simple. You agree with your employer that $200 a week of pre-tax salary goes into your super instead of your bank account. That $200 a week is RESC. Your taxable income falls by $10,400 over the year, and $10,400 appears as RESC on your income statement.
Beyond salary sacrifice, RESC also covers extra contributions negotiated into an individual employment contract above the compulsory rate, and employer contributions that match voluntary contributions you chose to make.
What it does not cover is the compulsory super guarantee. That is 12% of qualifying earnings and your employer has to pay it whether you like it or not, which is exactly why it is not reportable: you had no say in it.
The Test Is Influence, Not Amount
This is the part most explanations get wrong, including the ones that say "anything above the super guarantee is reportable". It is not about how much. It is about whether you could influence it.
Contributions required by an industrial instrument, an award or a collective agreement are excluded from RESC to the extent the employee had no capacity to influence either the requirement to contribute or the size of the contribution. An employer paying 15% under an enterprise agreement is paying 3% above the guarantee, and none of it is reportable, because nobody working under that agreement could have chosen otherwise.
Voting on the agreement is not influence. If the workforce approved an agreement that sets the rate for everyone, but no individual can change what goes in for them, the extra is not reportable.
The reverse also holds, and it catches people out. If an agreement gives you a choice, say between taking an amount as pre-tax super or as post-tax salary, and you pick the option that lowers your assessable income, the amount becomes reportable. You had a lever and you pulled it. That is the whole test.
Personal Deductible Contributions
If you contribute your own after-tax money and then claim a deduction for it, the contribution becomes reportable from the moment you claim. This matters most for sole traders and anyone without an employer making contributions for them.
The process has a step people skip, and skipping it is fatal to the deduction:
- Make the contribution to your fund.
- Give the fund a valid Notice of intent to claim or vary a deduction for personal super contributions.
- Wait for the fund's acknowledgement.
- Then lodge your return claiming the deduction.
The notice has to reach the fund by the earlier of the day you lodge your return and 30 June of the following year. Lodge first and the deduction is gone, and unlike most tax mistakes this one generally cannot be fixed afterwards.
The flip side: contribute your own money and don't claim a deduction, and nothing is reportable. It is the deduction that creates the reporting, not the contribution.
What Is Never Reportable
- The super guarantee. 12% of qualifying earnings, compulsory, not reportable.
- Extra contributions required by an award or agreement that you could not influence.
- Personal contributions where you claim no deduction. These are non-concessional and invisible to the income tests.
- Spouse contributions. Not reportable for either of you.
- Government co-contributions and the low income super tax offset. Money arriving from the government is not your income.
- Administration fees and insurance premiums your employer pays to the fund on your behalf, where they are not an amount you could have taken as salary.
Where the Add Back Actually Bites
Reportable super contributions are added to taxable income to build the broader income figures that various tests run on. Here is where it lands, in rough order of how often it surprises people.
- Study loan repayments. Repayment income is taxable income plus reportable super contributions, reportable fringe benefits, net investment losses and exempt foreign income. Sacrificing into super does not reduce your compulsory HELP repayment by a cent. People try this every year and it does not work.
- Family Tax Benefit and Child Care Subsidy. Both run on adjusted taxable income, which includes reportable super contributions. Sacrificing to qualify for a higher subsidy does not work either, and the reconciliation at year end produces a debt.
- Child support. The assessment uses an adjusted income that adds these amounts back.
- Medicare levy surcharge. Income for surcharge purposes includes reportable super contributions. You can sacrifice yourself below $101,000 of taxable income and still pay the surcharge.
- The spouse super tax offset and the government co-contribution. Both have income tests that count these amounts.
Notice the pattern. Almost every test that decides what you receive, or what levy you pay, adds the contributions back. The one thing salary sacrifice reliably reduces is the income tax on the sacrificed amount, which is the actual benefit and usually a real one: the amount is taxed at 15% inside the fund instead of your marginal rate.
The Exception Nobody Expects
There is one significant test that deliberately leaves reportable super contributions out of the income side, and it is worth knowing because getting it wrong means double counting.
Division 293 tax is an extra 15% on concessional contributions for people whose combined income and contributions exceed $250,000. Its income test looks like the surcharge test but with reportable super contributions stripped out. They are not ignored; they are counted on the other side of the equation, as part of the concessional contributions being tested. Counting them in both places would tax the same dollar twice.
The $250,000 threshold has not moved since 2017-18 and is not indexed, so wage growth alone pulls more people into it every year. Someone on $230,000 who sacrifices heavily can cross it without their salary changing at all.
What Payday Super Changed
From 1 July 2026, super moves with each pay run rather than each quarter, and contributions must generally reach the fund within 7 business days. Two changes matter directly for reportable contributions.
First, the super guarantee is now calculated on qualifying earnings, and qualifying earnings explicitly include salary sacrificed amounts. This puts beyond argument something that was already the rule: sacrificing does not shrink the base your employer calculates your 12% on. An employee on $100,000 who sacrifices $10,000 still gets 12% of $100,000, not of $90,000. The $10,000 goes in on top, and the $10,000 is the RESC.
Second, the maximum contribution base moved from a quarterly to an annual calculation. For 2026-27 it is $270,830. Once an employee's qualifying earnings reach that in a year, the employer can stop. Under the old quarterly cap, a bonus in one quarter could waste part of the cap while a quiet quarter left it unused; the annual figure removes that.
The concessional contributions cap also rose to $32,500 for 2026-27. That cap counts the super guarantee, salary sacrifice and personal deductible contributions together, so the reportable amounts are the part you control and the part most likely to push you over.
For the wider picture of what changed in payrolls on 1 July, see our guide to payroll obligations for Australian employers.
Getting It Right as an Employer
The reporting sits with you, and errors flow straight through to an employee's assessment and entitlements.
- Flag salary sacrifice correctly in your payroll software. It has to report as RESC through STP, not as an ordinary employer contribution. This is a configuration setting and it is wrong more often than you would think.
- Do not report the super guarantee as RESC. Overstating it inflates an employee's income for every test above and can cost them real money in reduced family payments.
- Have the sacrifice agreement in writing and in place before the work is done. An arrangement made after the employee has earned the money is not effective, and the amount is simply salary.
- Check the award before treating anything above 12% as reportable. If the extra is mandated and the employee cannot influence it, it is not RESC.
If an amount was reported incorrectly, fix it through an updated STP submission rather than leaving the employee to explain it to the ATO. We cover the practical side of this in our bookkeeping services.
Frequently Asked Questions
Does salary sacrificing reduce my HECS-HELP repayment?
No. Sacrificed amounts are added back to form your repayment income, so your compulsory repayment is the same as if you had taken the money as salary. This is the most persistent myth in the area.
Is the 12% super guarantee a reportable contribution?
No. Compulsory contributions are never reportable, because you have no capacity to influence them. Only amounts above the guarantee that you had a say over are reportable.
My employer pays 14% under an enterprise agreement. Is the extra 2% reportable?
Generally not, provided you cannot influence the rate or whether the contribution is made. If the agreement lets you choose between super and salary for some portion, the portion you direct to super is reportable.
Where do I find my reportable contributions?
RESC appears on your income statement in myGov, separately from your gross salary. Personal deductible contributions are whatever you claimed in your own return. Wait until your income statement is marked "tax ready" before relying on the figure.
Do reportable contributions increase my income tax?
No. They are not added to taxable income, so they do not change the tax on your salary. They are added only for the income tests that decide entitlements and levies.
Can I salary sacrifice to get under the Medicare levy surcharge threshold?
No. Income for surcharge purposes adds reportable super contributions back. Appropriate private hospital cover is the way to avoid the surcharge; sacrificing is not.
Salary sacrifice is usually worth doing. The contribution is taxed at 15% inside the fund rather than at your marginal rate, and for most people on the 30% rate or above that is a genuine saving. The mistake is assuming the benefit extends to everything else income is measured for. It does not, and the reporting exists precisely to make sure it does not.
Trew North Accounting has advised Melbourne employers and individuals for 40 years. If you are setting up a sacrifice arrangement, or your payroll is reporting contributions in a way that does not look right, see our guide to salary sacrificing into super, our personal tax services, or get in touch.
This article is general information, not advice for your circumstances. Rates, caps and thresholds change. Check current figures with the ATO, or with us, before you rely on them.