Key takeaways
- The June 2026 indexation rate was 2.8%, applied on 1 June to loan amounts unpaid for more than 11 months.
- Since the 2023 reform, the rate is the lower of CPI and WPI, which is why the 7.1% of 2023 was rewound to 3.2% and 2024's 4.7% became 4%.
- HECS debts carry no interest. Indexation is the only growth mechanism.
- Loans less than 11 months old are not indexed, so a debt incurred in the current study year skips its first 1 June.
- A voluntary repayment only beats indexation if the ATO receives and processes it before 1 June. Electronic payments can take up to 4 business days.
- The one-off 20% reduction was calculated on balances at 1 June 2025, before that year's indexation, and the indexation was re-worked on the reduced balance.
What 2.8% costs at 4 balances
The fast answer: multiply your 1 June balance by 2.8%. The 1 June 2026 round at four common balances:
| Balance at 1 June 2026 | Indexation added (2.8%) | New balance |
|---|---|---|
| $15,000 | $420 | $15,420 |
| $25,000 | $700 | $25,700 |
| $30,000 | $840 | $30,840 |
| $50,000 | $1,400 | $51,400 |
See indexation against your repayments
Whether your debt shrinks in a given year is a race between indexation and your compulsory repayment. The HECS repayment calculator shows your 2026-27 repayment on any salary, which you can set against the 2.8% growth to see which side is winning. What that withholding does to each individual pay is in the take-home pay calculator.
How indexation works
Each 1 June, the ATO applies the year's indexation rate to the part of your study loan that has been unpaid for more than 11 months. The mechanism covers HELP, VET Student Loans, SFSS, Student Start-up Loans and apprenticeship support loans alike. The stated purpose is to hold the loan's real value steady, so a degree repaid over 15 years costs roughly what it cost today, not less by stealth of inflation.
The rate formula changed in the 2023 reform round: indexation now tracks the lower of the Consumer Price Index and the Wage Price Index. Before that it was CPI alone, which is how 2023 produced the notorious 7.1%. Applying the lower-of rule retrospectively rewound 2023 to 3.2% and 2024 from 4.7% to 4%, with the difference credited back to borrowers. Since 2025 the ATO calculates each year's figure after the December-quarter CPI and WPI are released, using two years of Australian Bureau of Statistics data, so the rate is known months before 1 June rather than announced in April.
One thing indexation is not: interest. Nothing compounds daily, no rate rises mid-year, and there is no indexation at all in a year where you clear the debt before 1 June. It is also separate from the annual indexation of the repayment thresholds, which move each 1 July and are tracked on the 2026-27 tax changes page.
Indexation rates 2013-2026
| Year (applied 1 June) | Indexation rate |
|---|---|
| 2026 | 2.8% |
| 2025 | 3.2% |
| 2024 | 4% (originally 4.7%) |
| 2023 | 3.2% (originally 7.1%) |
| 2022 | 3.9% |
| 2021 | 0.6% |
| 2020 | 1.8% |
| 2019 | 1.8% |
| 2018 | 1.9% |
| 2017 | 1.5% |
| 2016 | 1.5% |
| 2015 | 2.1% |
| 2014 | 2.6% |
| 2013 | 2.0% |
The long-run picture: most years sit between 1.5% and 3%, with the 2022-2024 inflation spike the outlier. At 2.8%, 2026 is back inside the normal band. Wage growth below inflation keeps WPI as the binding number in high-CPI years, which is exactly the scenario the lower-of rule was built for.
Timing traps worth knowing
- Paying in the last week of May
Indexation applies to whatever balance the ATO has processed at 1 June. Electronic and Australia Post payments can take up to 4 business days to land on your account, cheques longer. A BPAY transfer on 30 May can miss the cutoff and save you nothing. Aim for mid-May at the latest.
- Assuming this year's uni fees get indexed
Amounts unpaid for less than 11 months are excluded. A loan reported in the current study year skips its first 1 June and is indexed the following year.
- Confusing indexation with your repayment
Indexation grows the balance each June; compulsory repayments shrink it once a year at assessment. Both happen automatically and neither shows up on a payslip. The repayment side is covered in HECS repayment rates.
- Reading an old balance
A screenshot from March misses the June indexation and any assessment credits since. Check the live figure first; the steps are in find your HECS debt.
How the 20% reduction interacted with indexation
The one-off 20% cut to student debts was calculated on balances as at 1 June 2025, before the 2025 indexation was applied, and processing ran from December 2025. Because the cut landed first in the order of operations, the ATO also recalculated the 2025 indexation on the reduced balance and credited back the difference. The 1 June 2026 round then applied 2.8% to the post-reduction balance. Practical upshot: your account shows several transactions (the reduction, an indexation adjustment, then the 2026 indexation), and the balance you plan around should be the current one, not the figure you remember from 2024. If you are weighing up an extra payment on the smaller balance, paying off HECS early covers the voluntary repayment mechanics.
Frequently asked questions
What was the HECS indexation rate for 2026?
Is HECS indexation the same as interest?
How is the indexation rate calculated?
Why did the 2023 rate change from 7.1% to 3.2%?
Can I avoid indexation by paying before 1 June?
Does indexation apply after the 20% reduction?
When is the 2027 indexation rate known?
Sources and further reading
- ATO: Study and training loan indexation rates (rate table and lower-of rule; accessed 28 July 2026)
- ATO: View your study loan account online (11-month rule and 20% reduction transactions)
- ATO: Voluntary repayments (payment processing times before 1 June)
Related resources
HECS Repayment Calculator
Your 2026-27 repayment on any salary
Open →Pay Off HECS Early
Voluntary repayments and the 1 June deadline
Open →Find Your HECS Debt
The myGov path to your live balance
Open →
Narelle Hartigan is a CPA-qualified tax accountant with over a decade of experience in Australian personal taxation and payroll. She founded PAYG Calculator Australia to make tax withholding easy for every Australian worker to understand.