HELP / HECS 1 June 2026 Indexation: Rate, Calculation & Last-Minute Repayment Decision

General information only. Speak with a registered tax agent before making a large lump-sum repayment.

Update, October 2026: the 1 June 2026 indexation has happened. The ATO applied a rate of 2.8% to eligible study and training loan balances, so the pre-1 June repayment window described below has closed for 2026. This article is kept as a record of how the 2026 indexation worked and as a guide to the same decision ahead of 1 June 2027.

On 1 June 2026, the ATO indexed the eligible part of every HELP, HECS, VSL, SFSS, SSL, ABSTUDY SSL and AASL balance. The only way to reduce the amount indexation was applied to was a voluntary repayment that cleared before that date (about 27 May 2026, allowing roughly 3 business days for BPAY clearance). A repayment made after 1 June only reduced the post-indexation debt, so the indexation on the original balance was locked in.

This article walks through how the indexation factor is calculated, what the “lower of CPI or WPI” rule meant in 2026, how much a voluntary repayment saved at the actual 2.8% rate, and the decision framework against parking the same cash in your mortgage offset.

See what the same decision looks like at your own numbers with our HELP Indexation Timing Calculator.

What 1 June indexation is

HELP indexation is applied annually, on 1 June, to the part of your accumulated loan that has remained unpaid for more than 11 months (the ATO’s wording). It is not interest in the everyday sense — there is no compounding mid-year and no interest accrues on amounts you have already repaid via payroll or voluntary payments during the year. But the effect is the same: your debt rises in real dollar terms.

The mechanics:

1. The ATO takes the debt balance at 1 June (after all voluntary repayments cleared and after any compulsory repayments processed from prior-year returns).
2. It multiplies the eligible part by the indexation factor for that year.
3. The new, larger balance is the figure you then chip away at over the following 12 months.

Crucially, compulsory repayments withheld from your wages during 2025-26 were not credited against your balance until your 2025-26 tax return was lodged and assessed — typically July–October 2026. So PAYG amounts your employer withheld all year sat in ATO’s account as a “pre-payment” that did not reduce the 1 June 2026 indexation base. Only voluntary lump sums made directly to the ATO before 1 June reduced the base.

The ATO calculates the rate each year after the December CPI and WPI figures are released, using ABS figures collected over the previous 2 years. This article was first published on 19 May 2026 with the 2026 rate described as not yet published. The ATO’s indexation rates table (last updated 17 April 2026) shows the published rates: 2.8% in 2026, 3.2% in 2025 and 4% in 2024. The 2024 rate was previously 4.7%; it was revised down to 4% when indexation was capped at the lower of CPI and WPI.

The 2024 reform: lower of CPI or WPI

Following the 2024 federal legislative changes (effective from indexation on 1 June 2023 retrospectively, with refunds processed in 2024), HELP indexation is now calculated as the lower of:

• CPI (Consumer Price Index growth, March quarter year-on-year), and
• WPI (Wage Price Index growth, December quarter year-on-year).

The intent of the reform was to stop high-inflation years (like 2023’s 7.1% CPI shock) outpacing wage growth and leaving borrowers worse off in real terms. The cap binds in years where prices rise faster than wages — exactly the years that hurt borrower cash flow most. In years where wages grow faster than prices, CPI is the lower of the two and binds as it always did. The ATO’s table shows 2023 as 3.2% (previously 7.1%) and 2024 as 4% (previously 4.7%) under the cap.

This rule is permanent and applies to all study and training support loans listed in s140-10 of the Higher Education Support Act 2003. It is administered automatically — you do not need to apply for the lower rate.

Worked example: $40,000 HECS debt, 1 June 2026

This example uses the actual 2.8% rate applied on 1 June 2026. For simplicity it assumes the whole balance had been unpaid for more than 11 months, so all of it was indexed. You start the day with a $40,000 HECS balance.

Scenario A: do nothing

• Balance on 1 June 2026: $40,000
• Indexation factor: 1.028
• Balance after indexation: $41,120
• Indexation cost: $1,120

Scenario B: voluntary repay $5,000 before 1 June

• Balance on 1 June 2026 (after BPAY clears): $35,000
• Indexation factor: 1.028
• Balance after indexation: $35,980
• Indexation cost: $980
• Saving vs Scenario A: $140 in avoided indexation

The $140 saving is what the $5,000 lump sum “earned” in the ~9 days between settlement and 1 June. Measured against the amount repaid, that is a 2.8% return — equal to the indexation rate, as you would expect. But because it is locked in within a few days, the effective time-weighted return is extraordinarily high.

Scenario C: voluntary repay $5,000 after 1 June

• 1 June balance: $40,000 (indexes to $41,120)
• Repay $5,000 on 5 June: balance becomes $36,120
• Indexation already taken: $1,120

You still end up with a lower debt than doing nothing, but you missed the indexation reduction. The $5,000 payment now just chips at the post-indexation balance — there is no avoided indexation to claim.

Decision framework: lump sum vs offset account

The key question for most borrowers with a mortgage (and the one to ask again before 1 June 2027):

Is the indexation rate higher than what the same $5,000 would earn in my offset account?

The arithmetic:

• Indexation rate (= effective return on lump sum) was 2.8% tax-free in 2026, after 3.2% in 2025 and 4% in 2024.
• Offset account return = your mortgage interest rate (currently ~5.5-6.5% variable in May 2026), tax-free.

In that rate environment, the offset usually won on a pure interest comparison. A dollar in your offset saved ~6% mortgage interest, while a dollar paid against HELP saved 2.8% indexation. The offset is also liquid — you can redraw it if you lose your job, need a deposit, or face a medical bill. HELP repayments are one-way: the ATO will not refund a voluntary payment.

But there are reasons HELP repayment can still be the right call:

1. No mortgage / no offset. If your alternative is a high-interest savings account at ~4.5-5% (taxed at your marginal rate), the after-tax return drops below the indexation rate for anyone earning above ~$45k. HELP lump-sum wins.
2. You’re about to cross a repayment threshold and want to clear the debt entirely. Once your balance hits zero, you stop seeing compulsory repayments withheld from wages — that’s an immediate cash-flow boost worth more than the indexation arithmetic.
3. You don’t trust yourself to keep the cash in the offset. Behavioural finance matters. If $5,000 sitting in the offset will get spent on a holiday by August, paying down HELP is a forced commitment device.
4. You expect indexation to outpace your mortgage rate. Unusual but possible if mortgage rates fall faster than CPI/WPI.

The HELP Indexation Timing Calculator lets you plug in your own balance, planned lump-sum amount, mortgage rate, and savings rate to see which option leaves you wealthier in 12 months.

One trap to avoid: do not stop your salary-sacrificed PAYG. Compulsory repayments withheld from wages are not refundable mid-year and they apply to your post-indexation balance regardless. Stopping HELP withholding to “free up cash for the lump sum” just creates a bill at tax time and a withholding adjustment notice.

How to make a voluntary repayment before 1 June (next date: 1 June 2027)

Voluntary repayments are made through ATO online services via myGov, or directly by BPAY:

1. Log in to myGov → ATO Online Services → Tax → Accounts → Tax accounts, then select the HELP / HECS / SFSS account.
2. Note the Biller code (75556) and your Payment Reference Number (PRN) — this is unique to you and routes the payment to your HELP account, not income tax.
3. From your bank, set up a BPAY to biller 75556, using your PRN as the reference.
4. Allow at least 3 business days for clearance. In 2026, a payment made on the morning of 30 May (a Saturday) may not have posted until Tuesday 2 June — too late — so the practical cut-off was Tuesday 26 May 2026. Work back the same way from 1 June 2027.
5. Check your HELP balance in myGov 2-3 business days later to confirm the payment has cleared and the new balance is what indexation will apply to.

Avoid:

• Credit card via Government EasyPay — surcharge (~0.69-1.45%) wipes out the indexation saving on small amounts.
• PayID — not a valid method for HELP repayments.
• Cheques in the mail — clearance is too slow and may miss 1 June even if posted in May.

There is no minimum repayment and no maximum. You can repay the entire balance if you want. The 5% voluntary repayment bonus was abolished from 1 January 2017 (2016-17 Budget measure) — there is no longer a discount for paying ahead.

What changes if you have multiple debts

If you carry HELP and SFSS, and ABSTUDY SSL — indexation hits each separately on 1 June at the same rate. Your one BPAY using your HELP PRN goes to HELP first. To direct a lump sum to a different debt (e.g. SFSS), use that account’s specific PRN — they are listed separately under “Tax accounts” in myGov.

For most borrowers with combined balances, the ATO applies compulsory repayments to the highest-rate-of-return debt first (currently HELP), but voluntary repayments follow the PRN you use. Check whether SFSS or another loan has a higher remaining balance you’d prefer to clear first.

When NOT to make a voluntary repayment

Skip the lump sum if any of the following apply:

• You will need the cash in the next 12-24 months (house deposit, business equipment, baby leave, etc). HELP repayment is irrevocable.
• You have higher-interest debt. Credit card at 22%, BNPL late fees, or a car loan at 9% all beat HELP indexation. Pay those off first.
• You earn under the repayment threshold ($67,000 for 2025-26) and expect to stay there for the foreseeable future. There is no compulsory repayment pressure, and your debt will eventually be written off at age 65 in many cases (or earlier under specific schemes).
• You’re planning to move overseas long-term and not return. Overseas obligations are calculable but enforcement is patchy outside reciprocal jurisdictions; the cash may serve you better elsewhere.

Key takeaways

• The 1 June 2026 indexation rate was 2.8%, applied to the eligible balance at 1 June; voluntary repayments had to clear by ~27 May to count. The same timing applies on 1 June 2027.
• Indexation rate is the lower of CPI or WPI since the 2024 reform; the ATO indexation page shows each published rate (2026: 2.8%, 2025: 3.2%, 2024: 4%, previously 4.7%).
• Compulsory repayments withheld from wages during a financial year are not credited until that year’s return is assessed — they do not reduce the 1 June indexation base.
• Compare HELP indexation rate vs your after-tax offset / savings return. With mortgage rates around 6% in May 2026, the offset usually won for those with a mortgage. Without one, a HELP lump sum usually won.
• BPAY via myGov PRN, at least 3 business days early. No 5% bonus exists since 2020 — only the avoided indexation matters.

Run the numbers at your specific balance and offset rate with the HELP Indexation Timing Calculator.

FAQ

Should I have paid off HECS before 1 June 2026?

It depended on your alternatives. If the cash would otherwise sit in a mortgage offset at ~6%, leaving it there usually won — the offset’s interest saving exceeded the 2.8% HECS indexation. If your alternative is a taxed savings account at ~5%, paying HECS usually wins after tax for anyone earning above ~$45k. Use the HELP Indexation Timing Calculator with your exact mortgage rate, savings rate, and marginal tax rate to see which side wins.

How was HECS indexation calculated in 2026?

The ATO applied an indexation factor to the eligible part of your 1 June 2026 HECS balance, equal to the change in the CPI or the WPI, whichever is lower. From 2025 the ATO calculates the figure after the December CPI and WPI are released, using ABS figures from the previous 2 years. The 2026 rate was 2.8%, published on the study and training loan indexation rates page, which also shows 2025 at 3.2% and 2024 at 4% (previously 4.7%).

Can I get a voluntary HECS repayment refunded if I change my mind?

No. The ATO will not refund a voluntary repayment to your HECS / HELP account. Only over-payments resulting from compulsory withholding (i.e. you ended up owing less than was withheld via PAYG) are refunded at tax time as part of your assessment. Plan your lump sum carefully and keep an emergency buffer separate.

Does paying HECS reduce my taxable income?

No. HELP / HECS voluntary repayments are not tax-deductible. They reduce the debt balance only, not your taxable income or tax payable. This is distinct from compulsory HELP repayments withheld from your wages — those are not deductions either; they are a separate liability calculated on your “repayment income” at year-end. For the full repayment mechanics, see How HELP repayments work and the 2025-26 HELP repayment rates.

Related insights

• How HELP repayments work — repayment income definition, withholding mechanics, threshold structure.
• 2025-26 HELP repayment rates explained — the full marginal-style band table.