Glossary
A HECS-HELP repayment is the compulsory annual payment toward your student debt, collected through PAYG withholding once your repayment income tops $67,000. It works like a tax but is calculated on a marginal cents-per-dollar scale of its own.
A HECS-HELP repayment is the amount you must pay toward your Higher Education Loan Program debt each financial year once your income crosses the minimum repayment threshold. For 2025-26 that threshold is $67,000 of repayment income, up from $54,435 in 2024-25. Below it, you repay nothing; above it, a compulsory repayment is calculated and collected alongside your income tax.
The system is now marginal, not cliff-based. You repay 15 cents per dollar on income between $67,001 and $124,999, and at $125,000 or more you repay $8,700 plus 17% of income above $125,000. Repayment income is a broader measure than taxable income, adding back things like reportable fringe benefits, net investment losses and reportable super contributions. The total is capped at 10% of your income and can never exceed your outstanding debt. Your employer withholds it each pay once you tick the HELP box on your TFN declaration, the ATO reconciles the lot at tax return time, and repayments made through the year are credited to your debt only after your return is processed.
The engine runs on repayment income, which is your taxable income plus reportable fringe benefits, total net investment losses, reportable super contributions and any exempt foreign income. If that figure is $67,000 or less in 2025-26, your compulsory repayment is exactly zero. Above the threshold, the repayment is 15% of the excess over $67,000, up to an income of $124,999. From $125,000 the formula switches to a flat $8,700 plus 17% of whatever you earn above $125,000.
Collection is invisible until it is not. Tick the HELP box on your TFN declaration and your employer's payroll withholds an estimate of the year's repayment each pay period, bundled in with PAYG tax. At tax return time the ATO computes the actual repayment from your final repayment income, credits your withheld amounts against it, and bills or refunds the difference. Only then is the repayment applied to your loan balance, which is why your myGov statement shows no movement all year.
The caps keep the system sane: the repayment can never exceed 10% of your total repayment income, and it can never exceed the debt itself. After 1 July 2025, the legislated one-off 20% reduction shrank every eligible balance, which lowered many people's remaining repayments in one stroke.
HELP repayments are a second, quieter tax on your payslip, and they stack on top of income tax and the Medicare Levy. At $100,000 of income, an extra dollar costs 30 cents of tax, 2 cents of Medicare and 15 cents of HELP repayment — a 47-cent effective marginal rate. Bonuses, pay rises and overtime all feel thinner than the letter of offer promised.
A colleague named Brent (yes, that Brent) accepted a $5,000 raise at $79,000 and proudly computed his new take-home using income tax alone. The HELP system disagreed by $750 a year, and Brent spent a pay cycle auditing payroll's correct maths before conceding. He also still has not ticked the box properly, so his July reconciliation has an annual sequel.
The highest-leverage thing most Australians with a HELP debt can do is budget on their stacked marginal rate, not the tax bracket. Run the HECS repayment calculator beside the take home pay calculator before negotiating anything. If a raise crosses $125,000, also check how salary sacrifice interacts with reportable income.
Repayment income of $80,000 sits $13,000 above the $67,000 threshold. At 15 cents per dollar the compulsory repayment is $1,950 for the year, or roughly $75 per fortnight withheld by payroll. Below $67,000 the same graduate would repay nothing at all. Add the 30% marginal tax bracket and 2% Medicare Levy, and each extra dollar earned at this income costs 47 cents in total. That stacking is why the raise from $78,000 to $82,000 buys less lifestyle than the accepts-letter suggests.
At $140,000 of repayment income, the repayment is $8,700 plus 17% of the $15,000 above $125,000, which is $2,550, for a total of $11,250. The 10% cap would allow $14,000, so it does not bite here. Effective marginal cost of the next dollar is 37% tax plus 2% Medicare plus 17% HELP — 56 cents gone before super. High incomes with HELP debts run some of the steepest effective marginal rates in the entire system.
At exactly $67,000 the compulsory repayment is $0, full stop. At $68,000 it is 15% of $1,000, or $150 per year — roughly $6 a fortnight, not a cliff that eats the raise. Under the old pre-2025 system, crossing a threshold applied a percentage to your whole income, so a $1 raise could trigger a four-figure repayment. The marginal design fixed that specific cruelty, which is worth knowing next time someone claims earning more costs you money. It costs 15 cents of the extra dollar, not 15% of everything.
Mistake: Not ticking the HELP box on the TFN declaration when starting a job.
Why it bites you: Nothing is withheld for your debt all year, and the full compulsory repayment — easily $2,000-plus on $85,000 — arrives as a single bill at tax time. Brent treats this as an annual religious observance.
Mistake: Calculating take-home pay with income tax and Medicare only.
Why it bites you: At $100,000 the HELP repayment adds 15 cents per marginal dollar, a combined 47-cent rake. Offers, bonuses and raises all shrink by a third more than the tax bracket alone implies.
Mistake: Expecting repayments to reduce the balance during the year.
Why it bites you: Withheld amounts are credited only after your tax return is processed, and the 1 June indexation lands first. Your myGov balance can therefore rise mid-year even while payroll diligently withholds repayments.
Mistake: Assuming the 20% debt reduction cleared the obligation to repay.
Why it bites you: The one-off cut on 1 July 2025 shrank balances; it did not abolish the system. If your repayment income stays above $67,000, compulsory repayments continue on any remaining debt until it is gone.
I spent a weekend re-deriving the 2025-26 HELP repayment schedule from the legislation so you don't have to, and the marginal design is genuinely the good timeline. Fifteen cents on the excess beats the old cliff system, where a single extra dollar once triggered a repayment on your entire income. Parliamentary competence, in my lifetime; I nearly dropped my coffee.
The thing people still blow up is the stacking. Forty-seven cents per marginal dollar at $100,000 is not a hardship and not a conspiracy; it is just a number you must know before negotiating pay. Tick the HELP box, budget on the stacked rate, run the calculator once a year, and let Brent keep discovering reconciliation like it is a new streaming series.
Compulsory repayments start once repayment income exceeds $67,000. At or below that figure the repayment is $0, regardless of how large the debt is.
You repay 15% of the $13,000 above the threshold, which is $1,950 per year. That works out to about $75 per fortnight withheld alongside your PAYG tax.
Per dollar, since 2025-26. Only income above $67,000 attracts the 15-cent rate, so crossing the threshold costs cents on the excess, not a percentage of everything.
You owe the full compulsory repayment when your tax return is assessed, which can be thousands of dollars at once. Lodge a new TFN declaration ticking the HELP box and set aside the shortfall already accrued.
It reduced your balance as at 1 June 2025, which can shorten how long you repay. The repayment rules, thresholds and rates are unchanged, so incomes above $67,000 still owe compulsory repayments on any remaining debt.
Disclaimer: This information is general in nature and does not constitute financial or legal advice. Always consult a qualified professional for your specific situation.

Financial Chaos Analyst
Ivy Sinclair-Wren is a Financial Chaos Analyst covering investing, AI, wealth psychology, and the emotional consequences of opening finance apps during market crashes. Based in Melbourne, she specializes in demystifying the Australian tax code and helping users navigate the intersection of spreadsheet logic and human irrationality.