Does Salary Sacrifice Reduce HECS Repayments?
How salary sacrifice affects your HECS-HELP repayment income, and why it won't lower your student loan repayments.
Does Salary Sacrifice Reduce HECS Repayments?
Many Australians with a HECS-HELP debt wonder whether salary sacrificing into super can reduce their student loan repayments. It's a logical question — if salary sacrifice lowers your taxable income, shouldn't it also lower your HECS repayment?
In most cases, salary sacrifice does NOT reduce HECS repayments. The ATO uses a special measure called repayment income — not taxable income — to calculate your HECS obligation. Repayment income adds back reportable super contributions (including salary sacrifice), so the amount you sacrifice is effectively included in the calculation.
To estimate your HECS repayment based on your income, try our HECS-HELP Repayment Calculator.
How HECS Repayment Income Is Calculated
The ATO does not use your taxable income alone to determine your HECS repayment. Instead, it uses repayment income, which is a broader measure designed to capture income that may have been reduced through salary packaging or investment strategies. Repayment income is calculated as:
- Taxable income — your gross income minus allowable deductions
- Reportable super contributions — including salary sacrifice amounts above the SG base
- Total net investment losses — negative gearing and other investment losses added back
- Reportable fringe benefits — the grossed-up taxable value of any fringe benefits
Because salary sacrifice contributions are classified as reportable super contributions, they are added back to your taxable income when calculating repayment income. This means salary sacrifice has no effect on your HECS repayment rate or amount.
Worked Example: $100,000 Salary with HECS
Comparing the HECS repayment outcome with and without $10,000 in salary sacrifice.
Without Salary Sacrifice
Gross salary: $100,000
Taxable income: $100,000
Reportable super: $0
Repayment income: $100,000
HECS rate: 6%
HECS repayment: $6,000
With $10,000 Salary Sacrifice
Gross salary: $100,000
Taxable income: $90,000
Reportable super: $10,000
Repayment income: $100,000
HECS rate: 6%
HECS repayment: $6,000
Outcome: The HECS repayment is identical in both scenarios ($6,000). Although salary sacrifice reduced taxable income to $90,000, the $10,000 in reportable super contributions is added back, resulting in the same $100,000 repayment income. However, income tax drops by ~$3,500 with salary sacrifice.
Why Salary Sacrifice Is Added Back
The government introduced the repayment income formula to prevent people from using salary packaging arrangements to artificially reduce their HECS obligations. Without this rule, high-income earners could salary sacrifice large amounts into super and significantly reduce — or even eliminate — their HECS repayments while still earning the same total remuneration.
By adding reportable super contributions, fringe benefits, and investment losses back to taxable income, the ATO ensures that HECS repayments are based on your true economic income rather than your taxable income alone.
HECS Repayment Thresholds (2025–26)
HECS repayments are calculated as a percentage of your repayment income once it exceeds the minimum threshold. The rates for the 2025–26 financial year are:
| Repayment Income | Repayment Rate |
|---|---|
| Below $54,435 | 0% |
| $54,435 – $70,618 | 1% |
| $70,619 – $90,788 | 3% |
| $90,789 – $100,870 | 5% |
| $100,871 – $130,092 | 6% |
| $130,093 – $150,000+ | 8% – 10% |
These thresholds are updated annually by the ATO. The full schedule includes more granular tiers between 1% and 10%.
Use our HECS-HELP Repayment Calculator to see your exact repayment based on your income.
Does Salary Sacrifice Still Help If You Have HECS?
Yes. Even though salary sacrifice won't reduce your HECS repayments, it still provides meaningful financial benefits:
Lower income tax. Salary sacrifice reduces your taxable income, which directly lowers your income tax. For a $100,000 earner sacrificing $10,000, the income tax saving is approximately $3,500 per year — even though the HECS repayment stays the same.
Higher retirement savings. The sacrificed amount goes into your super fund and is taxed at just 15% (instead of your marginal rate of 30–45%). Over decades, the compounding effect of larger super contributions can significantly boost your retirement balance.
Automatic saving discipline. Salary sacrifice is deducted from your pay before it hits your bank account, making it an effective forced savings mechanism — particularly useful if you find it difficult to save voluntarily.
The key takeaway: salary sacrifice is still a valuable tax strategy for people with HECS debt. It just won't help you pay off your student loan any faster.
| Scenario ($100K salary) | Income Tax | HECS Repayment |
|---|---|---|
| No salary sacrifice | ~$22,788 | $6,000 |
| $10,000 salary sacrifice | ~$19,288 | $6,000 |
Income tax includes Medicare levy. HECS repayment is unchanged because repayment income remains $100,000 in both cases.
Frequently asked questions
Sources
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