Your HECS-HELP debt grows every 1 June through indexation, so it’s natural to wonder whether paying extra to the ATO before indexation hits is a smart move. Voluntary HECS repayments are completely optional, made on top of what your employer already withholds, and they immediately shrink your debt. But are they actually worth it? For most graduates, the honest answer is: probably not — but there are specific situations where they make sense. Here’s the full breakdown with the real numbers.
What Is a Voluntary HECS Repayment?
If you earn above the repayment threshold (now $67,000 for 2025–26), you’re already making compulsory repayments through the tax system — your employer withholds extra from each pay, and the ATO applies it to your HELP debt when your tax return is assessed. A voluntary repayment is any extra payment you make directly to the ATO on top of that, at any time, in any amount. There’s no minimum and no limit.
You can make one through myGov or BPAY, and the payment reduces your outstanding balance as soon as the ATO processes it. One critical detail: indexation is applied on 1 June each year to the portion of your debt that has been unpaid for more than 11 months. So a voluntary payment made in May reduces the balance that indexation is calculated on — while a payment made in July won’t help you until the following June.
If you want to model how your own balance and repayments track over time, the HECS repayment calculator lets you plug in your debt and income to see your projected payoff date.
The Big Change: There’s No Voluntary Repayment Bonus Anymore
Years ago, there was a genuine financial incentive to pay extra. Under the old rules, voluntary repayments of $500 or more attracted a 5% bonus — pay $1,000, and $1,050 would be credited against your debt. Before that, the bonus was even more generous (up to 15% for older debts in some eras).
That bonus was abolished entirely from 1 January 2017, along with the 10% upfront discount for students paying their fees directly. Since then, a voluntary repayment of $1,000 reduces your debt by exactly $1,000 — not a dollar more. The government removed the bonus on the basis that it made little difference to repayment behaviour, and it has never been reinstated. So if you’re expecting a discount for paying early, adjust your expectations: the only “reward” for a voluntary repayment now is the indexation you avoid.
How HECS Indexation Works in 2025–26
HELP debt doesn’t charge interest — but it’s not free either. Each 1 June, the ATO applies indexation, which adjusts your debt to keep pace with inflation. For years indexation was tied to the Consumer Price Index alone, which is why the June 2023 figure hit a shocking 7.1% — adding roughly $1,700 to the average debt in a single year.
The rules were then changed: indexation is now capped at the lower of CPI and the Wage Price Index, and the inflated 2023 and 2024 rates were retrospectively reduced. Here are the official ATO indexation rates:
| Indexation year (applied 1 June) | Rate | Basis |
|---|---|---|
| 2023 | 3.2% (originally 7.1%) | Retrospectively capped |
| 2024 | 4.0% (originally 4.7%) | Retrospectively capped |
| 2025 | 3.2% | Lower of CPI/WPI |
| 2026 | 2.8% | Lower of CPI/WPI |
| 2022 | 3.9% | CPI |
| 2021 | 0.6% | CPI |
Two other changes arrived in 2025: a one-off 20% cut to all HELP debts as they stood before 1 June 2025 (applied automatically by the ATO), and a new marginal repayment system with the minimum threshold lifted to $67,000.
Why Indexation Makes Voluntary Repayments Tempting
On paper, the argument for paying extra is simple: every dollar you repay before 1 June is a dollar that escapes that year’s indexation. With a $40,000 debt and 3.2% indexation, that’s $1,280 added to your balance in a single year — more than many graduates realise.
It feels particularly painful because compulsory repayments arrive only when your tax return is assessed — typically after indexation has already been applied to the full balance. Voluntary payments are one of the few levers that let you get ahead of the June deadline.
The Opportunity-Cost Test: What Your Money Could Earn Elsewhere
Here’s the catch. Avoiding 2.8–3.2% indexation only “earns” you 2.8–3.2%. Meanwhile, your spare cash has other jobs it could do — and most of them pay better. Compare the options side by side:
| What you do with $10,000 | Effective annual return | After-tax benefit on $10k |
|---|---|---|
| Voluntary HECS repayment | ~3.0% (indexation avoided) | ~$300 |
| High-interest savings account | ~4.5% | ~$450 (interest is taxable) |
| Offset against a variable mortgage (~6%) | ~6.0% (tax-free equivalent) | ~$600 |
| Extra super contribution (salary sacrifice) | Market returns + 15% tax rate | Often highest over long horizons |
The comparison is stark. Put $10,000 into a savings account earning 4.5% and you earn roughly $450 in a year. Use that same $10,000 to make a voluntary HECS repayment and you save roughly $300 in avoided indexation — even though the savings interest is taxable, you’re still ahead keeping the cash.
Remember too that HECS debt is uniquely forgiving: it doesn’t affect your credit score, there’s no penalty for slow repayment, the “interest” is just inflation adjustment, and if your income drops below $67,000, compulsory repayments stop automatically. Very few debts are this cheap to carry — which is precisely why rushing to clear it is usually a poor use of cash.
Scenario: A $40,000 Debt Over Five Years
Let’s make this concrete. Take a graduate with a $40,000 HELP balance earning $85,000 a year. Under the 2025–26 marginal system, their compulsory repayment is 15 cents per dollar above $67,000 — ($85,000 − $67,000) × 15% = $2,700 per year. Assume indexation averages 3%. Three strategies:
| Strategy | Extra paid over 5 years | Debt after 5 years (approx.) | Indexation avoided |
|---|---|---|---|
| Pay compulsory minimum only | $0 | ~$33,300 | — |
| Extra $200/month voluntary | $12,000 | ~$21,600 | ~$500 |
| Invest the $200/month at 5% instead | $0 to ATO | ~$33,300 | ~$13,500 saved (net of avoided indexation: ~$13,000 ahead) |
The extra-repayment strategy does pay off — it cuts the debt by about $11,700 compared to the minimum, including roughly $500 of indexation you never paid. But the investing strategy leaves you with the same $33,300 debt and around $13,500 in savings — roughly $13,000 ahead in net wealth, even after accounting for the indexation you absorbed. The maths consistently favours investing or offsetting over voluntary repayments, unless your alternative use of the money earns less than ~3% after tax.
You can check your own take-home pay and compulsory repayment amount for your salary level on the $85,000 salary breakdown, or model your personal payoff timeline with the HECS calculator.
When Voluntary Repayments Actually Make Sense
The blanket “don’t bother” advice has real exceptions. Voluntary repayments are worth considering when:
- You’re applying for a mortgage soon. Lenders treat compulsory HELP repayments as a committed expense that reduces your borrowing capacity. Clearing the debt can increase the amount a bank will lend you.
- The balance is small. If you owe $3,000 and indexation would add $100, just clearing it before June is clean and simple. The opportunity cost of a few thousand dollars is negligible; the admin simplicity of closing the account is real.
- You’re moving overseas. Australians living abroad with HELP debt still have compulsory repayment obligations reported through their tax return, and keeping the account alive adds paperwork. Some expats prefer to clear it and simplify.
- It’s May and the money is sitting idle. If you have spare cash earning nothing — sitting in a transaction account at 0% — then a voluntary payment just before 1 June is genuinely better than nothing. The bar is low, but this clears it.
- You simply hate debt. Behavioural finance matters. If a shrinking balance helps you sleep at night, that’s a legitimate reason — just know you’re paying a small premium for the peace of mind.
When You’re Better Off Keeping the Cash
For most graduates, the cash has a better home. Prioritise these before voluntary HECS payments:
- An emergency fund. Three months of expenses in a high-interest account beats any voluntary repayment. You can’t get voluntary payments back — once it’s with the ATO, it’s gone.
- Higher-interest debt. Credit cards and personal loans at 10–20% should be cleared long before you touch HECS.
- Your mortgage or offset. At current variable rates, every dollar in an offset account “earns” roughly double what you’d save on HECS indexation — and it’s tax-free.
- Superannuation. Extra contributions via the super calculator can show you how salary-sacrificed dollars compound at a 15% tax rate — a far stronger long-term wealth builder than shrinking a 3% indexed debt.
- A house deposit. For most young Australians, the deposit is the bottleneck to home ownership, and HECS compulsory repayments are already slowing it. Diverting deposit savings to voluntary HECS payments works against your own goal.
Frequently Asked Questions
Is there still a bonus for voluntary HECS repayments?
No. The 5% voluntary repayment bonus was abolished on 1 January 2017, and nothing has replaced it. A voluntary repayment of $1,000 reduces your debt by exactly $1,000. Older references to a 15% bonus relate to pre-2005 debts and are long obsolete.
Do voluntary repayments reduce my compulsory repayments?
No. Your compulsory repayment is calculated purely from your income and the repayment thresholds — currently 15 cents per dollar above $67,000 for 2025–26. Voluntary payments don’t lower your withholding or your assessed repayment; they simply shrink the balance faster on top of what the tax system takes.
When is the best time to make a voluntary repayment?
Before 1 June. Indexation is applied to your outstanding balance each 1 June, so a payment made in May reduces the balance that indexation is calculated on. The same payment made in July achieves nothing until the following June. If you’re going to pay extra, time it for late May.
Does HECS debt charge interest?
No — and this is a crucial distinction. HELP debt has no real interest rate; it’s indexed to inflation (currently the lower of CPI and WPI, around 2.8–3.2%) each 1 June to preserve its real value. That’s why it’s one of the cheapest debts you can carry, and why paying it down aggressively is rarely optimal.
Will clearing my HECS debt help me get a mortgage?
Yes — this is one of the strongest reasons to make voluntary repayments. Lenders subtract your compulsory HELP repayment from your assessed income when calculating borrowing capacity. Clearing the debt entirely removes that deduction, which can meaningfully increase what a bank will lend you.
Should I make a voluntary repayment before the 20% debt cut?
The legislated one-off 20% reduction was applied to balances as they stood before 1 June 2025, automatically by the ATO — so it’s already reflected in your current balance. Going forward, the decision is purely about indexation versus opportunity cost: with indexation around 3% and savings accounts paying 4–5%, keeping the cash usually wins.
The Bottom Line
Voluntary HECS repayments are a legitimate tool, but they’re rarely the best use of your money. With the 5% bonus gone since 2017, indexation capped around 3%, and no interest compounding against you, a HELP debt is the cheapest loan most Australians will ever hold — while savings accounts, mortgage offsets and super all offer clearly better returns on the same dollars.
The exceptions are real: pay extra if a mortgage application is looming, the balance is nearly gone, you’re heading overseas, or the cash would otherwise earn nothing before the 1 June deadline. For everyone else, make your compulsory repayments, let indexation do its modest worst, and put your spare money to work where it actually grows.
Want to see the numbers for your own situation? Run your debt, income and extra payments through the HECS repayment calculator to find your projected payoff date — and check what your salary really leaves you with on the $85,000 after-tax breakdown.