HECS Repayment Calculator AU 2025–26: Marginal Bands + 20% Debt Cut

Use the Velofy HECS repayment calculator to work out your exact 2025–26 repayment under the new marginal system in under 30 seconds. Enter your income and HECS balance — the calculator returns your annual repayment, monthly PAYG withholding, payoff timeline at current indexation, and whether voluntary repayments make financial sense at today's savings rates. Below: the official ATO bands for 2025–26, how the 20% debt cut was applied, and three worked examples at typical Australian incomes ($85k, $105k, $150k).

HECS 2026: Indexation, Threshold and Repayment at a Glance

HECS-HELP indexation for 2026 is 3.3%, applied to your remaining balance on 1 June 2026. Compulsory repayments now start at $67,000 under a marginal system: 15c per $1 earned between $67,001 and $125,000, then $8,700 plus 17c per $1 above $125,000, and 10% of total income above $179,286. The marginal system replaces the old debt cliff where crossing a threshold triggered repayment on your whole income. Separately, the government applied a flat 20% reduction to all outstanding HELP balances as at 1 June 2025 — auto-applied, no application required.

HECS 2025–26 indexation 3.3% (March quarter WPI cap), effective 1 June 2026. The 20% debt reduction was applied to balances as at 1 June 2025, before indexation. Marginal repayment system in force from 1 July 2025. Source: ato.gov.au Study and training loan indexation rates; Department of Education Study Assist.

Priya is 27, a registered nurse in Melbourne earning $85,000 a year. Before 2026, her HECS debt stood at $34,000. In early 2026 the government applied a flat 20% reduction to every outstanding HECS-HELP balance — automatically, with no application. Priya's debt dropped overnight by $6,800 to $27,200. She did not know until she checked myGov.

The reduction is real and significant. But for most Australians it is only one part of a bigger picture — new repayment thresholds have also changed how much you pay each year, indexation is sitting at 3.2–3.6%, and HECS debt has a direct and often overlooked impact on home loan borrowing power. Here is everything that changed, what it means for your money, and the one strategy most graduates have never considered.

What the 20% HECS Reduction Actually Means

The 20% reduction was applied to HELP balances as at 1 June 2025, before the annual indexation adjustment on 1 June 2026. The sequencing matters: the cut came first, then indexation was applied to the lower balance — not the original amount.

The reduction was automatic — you did not need to apply, lodge anything, or contact the ATO. Your updated balance is visible at myGov → ATO → Loans → Study and training loan accounts.

Priya's example: Her $34,000 reduced to $27,200 — saving $6,800 in principal that she would otherwise have spent the next two years repaying. At her $2,700 annual repayment rate, the reduction effectively gives her 2.5 repayment-free years.

The New Marginal Repayment System — No More Debt Cliff

From the 2025–26 financial year, HECS repayments switched to a marginal repayment system — one of the most significant structural improvements to the scheme in years.

Under the old system, crossing an income threshold triggered a repayment rate on your entire income. Earning $67,001 instead of $66,999 could cost you thousands more in HECS repayments that year — a cliff effect that penalised overtime, bonuses, and promotions. The new system calculates repayment only on income above each threshold — just like income tax.

Priya's repayment calculation: Her $85,000 salary sits in the first band. Annual repayment = 15% × ($85,000 − $67,000) = 15% × $18,000 = $2,700 per year ($225/month via PAYG withholding).

Comparing two job offers as a HECS-affected graduate? The headline salary isn't the right number. A $95,000 offer with 12% SGC and a $90,000 offer with 13% SGC look 5k apart, but after HECS ($4,200 vs $3,450) and the super-rate compounding, the gap is closer to $1,500 in real take-home plus a meaningfully larger 30-year retirement balance for the 13% offer. The Velofy Job Offer Comparison Calculator runs base + super% + bonus likelihood + HECS impact + 30-year retirement-balance gap side-by-side so the trade-off becomes explicit.

One trap for higher earners: if your income crosses $101,000 (singles) you also hit the Medicare Levy Surcharge of 1.00% on top of HECS — a separate tax that only applies if you don't hold private hospital cover. A graduate earning $105,000 with no hospital policy pays $5,700 HECS (15% × $38,000 above the $67k threshold) plus an extra $1,050 MLS in the same year — a combined $6,750 hit. The $1,050 MLS portion is avoidable if you hold complying private hospital cover for the full year. Model your combined liability with the Medicare Levy Surcharge calculator 2025–26 to see whether basic hospital cover would cost less than the surcharge at your income.

HECS Indexation 2026 — The Exact Rate, Formula, and Dollar Cost

The HECS indexation rate for 2026 is approximately 3.2–3.6% (confirmed ATO figures published 1 June each year). On a $27,200 balance, that adds approximately $870–$980 to your debt on 1 June 2026, before any compulsory repayment offsets it.

How HECS indexation is calculated in 2026

Since 1 June 2023, HECS-HELP indexation is capped at the lower of CPI or the Wage Price Index (WPI) — a structural fix that replaced the CPI-only cap, which had caused the damaging 7.1% indexation spike in 2023. The exact formula:

1. ATO calculates the 12-month CPI to the March quarter (latest ABS release before 1 June)
2. ATO calculates the 12-month WPI to the March quarter (latest ABS release before 1 June)
3. The lower of the two is applied to every outstanding HELP, HECS, VET Student Loan, OS-HELP, SA-HELP, and Australian Apprenticeship Support Loan balance held on 1 June
4. Indexation is applied BEFORE any tax-time compulsory repayment is netted off

For 2026, the March quarter CPI was approximately 4.1% and WPI 3.3% — so 3.3% WPI is the cap applied to all HELP balances on 1 June 2026. The official rate is finalised by the ATO and published at ato.gov.au.

HECS indexation dollar impact by balance size (2026)

How HECS indexation 2026 compares to other debt

At 3.3%, HECS is one of the cheapest debts available to any Australian — well below the inflation rate of ~4.1%, meaning your debt is shrinking in real terms even as the nominal balance grows. A credit card balance of $27,200 at 20% interest costs $5,440 per year. A personal loan at 10% costs $2,720. HECS at 3.3% costs $898. That is why most financial advisers tell graduates to prioritise high-interest debt or a high-interest savings account (currently 4.5-5.5%) over voluntary HECS repayments.

When does HECS indexation apply each year?

Indexation is applied once per year, on 1 June. The rate applies to your balance as it stood on that date — so a voluntary repayment made on 31 May reduces the balance that gets indexed; a repayment made on 2 June does not. For Australians considering a voluntary top-up, the strategic window is the last week of May.

The annual compulsory repayment (taken via PAYG withholding throughout the year and reconciled at tax time) is netted off AFTER indexation — so your end-of-FY-26 balance is: opening balance × 1.033 − compulsory repayments − any voluntary payments.

Should You Pay Off HECS Early? The Honest Maths

The question every HECS holder asks: should I make a voluntary lump-sum repayment? The maths is straightforward:

• HECS indexation 2026: ~3.2–3.6% per year
• High-interest savings accounts (May 2026): 4.5–5.5% per year
• 12-month term deposits: up to 5.0%
• Diversified share index fund (long-run): 7–10% per year (with volatility)

If your savings account pays 4.8% and HECS costs 3.4%, every $10,000 you keep in savings rather than paying off HECS earns you $140 more per year — risk-free. Over five years on a $27,200 balance, that difference compounds to over $1,400 in your favour.

Priya's decision: With a $27,200 balance, a savings account earning 4.8% nets her $1,306/year. HECS indexation at 3.4% costs $925. Keeping the money in savings is $381/year better. The general conclusion for most people: do not make voluntary HECS repayments while savings accounts pay above indexation.

The one exception: If your balance is small enough to clear entirely — say, under $8,000–$10,000 — eliminating the debt removes your compulsory annual repayment obligation immediately. Priya pays $2,700/year in HECS. If she had only $6,000 remaining, clearing it in one hit frees $2,700/year of cash flow permanently. That is a different argument to the pure indexation maths.

HECS and Your Home Loan — The Hidden Borrowing Impact

This is the aspect of HECS that catches first home buyers most off guard. When a bank assesses your home loan serviceability, it includes your compulsory HECS repayment as a recurring monthly expense — exactly like a car loan or credit card minimum. That directly reduces the income available to service a mortgage.

Borrowing reduction estimates based on APRA +3% serviceability buffer at a 6.5% variable rate, 30-year principal and interest. Individual bank assessments vary.

Priya's situation: With her $27,200 HECS balance and $85,000 salary, her $2,700 annual repayment reduces her borrowing capacity by roughly $45,000. If she is planning to buy a home in the next 12–24 months and has $27,200 available in savings, clearing the HECS debt before applying for a loan effectively adds $45,000 to her maximum loan — even though the pure indexation maths says to keep it.

This is the one scenario where paying off HECS early makes clear financial sense: when you are within 12–24 months of a home loan application and the debt is small enough to clear in one payment. Always model both scenarios with a mortgage broker before deciding.

Reducing HECS Repayments — The Personal Super Contribution Strategy

Here is the strategy most graduates have never heard of.

Many people assume salary sacrificing into super will reduce their HECS repayments. It will not. The reason: the ATO calculates HECS repayments on your repayment income, which includes your taxable income plus reportable employer super contributions (RESC). When your employer makes salary sacrifice contributions on your behalf, those contributions are added back as RESC — leaving your repayment income unchanged.

However, personal deductible contributions work differently. If you contribute money directly to your super fund from your after-tax pay and claim a deduction under s290-170, that amount reduces your taxable income — and because it is a personal contribution (not an employer contribution), it is not classified as RESC. Your repayment income genuinely drops.

Priya's example: She contributes $5,000 directly to her super fund before 30 June and lodges a valid s290-170 notice of intent. Results:

• Taxable income: $85,000 → $80,000 (after $5K deduction)
• HECS repayment income: $80,000 (RESC = $0 — personal contribution, not employer)
• New HECS repayment: 15% × ($80,000 − $67,000) = $1,950 — saving $750/year
• Tax saving from the deduction itself: $5,000 × 15% (30% Stage 3 marginal − 15% super tax) = $750
• Total benefit: $1,500 — from one $5,000 super contribution