Should you pay off HECS early? Voluntary repayments before 1 June

Money you pay before 1 June is not indexed that day. That is the only saving: there is no interest, no early-repayment discount, and your compulsory repayment for the year does not change. The question is whether that saving beats what the same money would earn elsewhere.

Estimate only. Figures use the ATO’s published thresholds, rates and formulas. Your notice of assessment from the ATO is the only authoritative figure. This is not financial or tax advice. Read the disclaimer.

How the saving works

On 1 June the ATO takes your balance, deducts voluntary repayments made since the last 1 June and compulsory repayments assessed in that time, then applies the indexation factor (HESA s140-5). A dollar repaid before 1 June is never indexed again. A dollar repaid on 2 June is indexed a year later.

Because indexation is the lower of CPI and WPI, the saving roughly matches inflation. It is certain and not taxed, but it is also the only benefit. Your compulsory repayment for the year is unchanged, so paying early does not give you more take-home pay until the debt is fully gone.

When paying early tends to make sense

You have no higher-cost debt (credit cards, personal loans) and an emergency fund in place.
Your alternative after-tax return is lower than the indexation rate you expect.
You are close to clearing the debt and want your employer to stop withholding.

When it tends not to

You have a mortgage with an offset account at a rate above expected indexation: money in the offset in effect earns the mortgage rate, without tax, and stays available.
You may need the cash: voluntary repayments are not refundable.
You expect a low income for a long time. The debt is then repaid slowly or not at all, and it is cancelled on death — a voluntary repayment would be money you did not have to pay.

How to pay and when

Find your payment reference number (PRN) in the ATO app or ATO online services (myGov).
Pay by one of the methods on the ATO’s “How to pay” page, from Australia or overseas.
Allow up to 4 business days for electronic or Australia Post payments to reach your account, and pay well before 1 June.
Check your loan account (Tax › Accounts › Loan accounts) to confirm it arrived.

Salary packaging is possible with some employers. The ATO says the repayments must still be made through its usual payment options, must stop as soon as the loan is paid off, and may create a fringe benefit — it recommends financial advice before setting one up.

To see how a lump sum or yearly extra payment changes your pay-off date, use the main calculator.

Frequently asked questions

What is the deadline to avoid indexation on 1 June 2027?

The payment must be received and processed by the ATO before 1 June 2027. Electronic and Australia Post payments can take up to 4 business days to appear on your ATO account; mailed cheques take longer. For 2026, studyassist.gov.au advised paying by 26 May.

Can I get a voluntary repayment back?

No. The ATO states voluntary repayments are not refundable.

Is a voluntary HECS repayment tax deductible?

Not when you or someone other than your employer makes it. If your employer makes it for you, the employer may be able to claim a deduction and may pay fringe benefits tax on it.

I am paying the whole balance off. Anything to watch?

Pay before you lodge your tax return. If your return is assessed before the payment is credited, a compulsory repayment may be raised on your notice of assessment. Then give your employer a new withholding declaration so they stop withholding.

Does a voluntary repayment lower my compulsory repayment this year?

No. The compulsory repayment depends on your income, not your balance (unless the balance left is smaller than it).

Official sources

Voluntary repayments — ATO, page updated 10 September 2026.
Study and training loan indexation rates — ATO, page updated 17 April 2026.
Indexation of 2.8% will be applied to your study loan on 1 June 2026 — studyassist.gov.au (Department of Education), page updated 7 May 2026.
Higher Education Support Act 2003 – compilation C2026C00297 (ss 140-5 to 140-30, 154-1 to 154-25) — Federal Register of Legislation, compilation in force from 1 July 2026.

All pages checked on 29 September 2026.

Page updated 29 September 2026.