If you have a HECS-HELP debt and you live overseas, your obligation to repay it does not pause when you board the plane. Since 2017, the ATO has required Australian residents abroad and non-residents alike to assess their worldwide income against the HECS compulsory repayment thresholds and make repayments accordingly. What catches many expats off guard is how that worldwide income is measured: your foreign salary is converted to Australian dollars using ATO exchange rates, meaning the amount you owe in a given year can shift meaningfully based on currency movements alone, independent of any change in your actual lifestyle or earning power [2] [4].
TL;DR
- Australian expats with HECS-HELP debt must include worldwide income in their repayment calculation, regardless of where they live [2].
- For the 2025-26 income year, the HECS repayment threshold has increased to $67,000 AUD, up from $54,435 in the 2024-25 income year [4]. These figures are subject to change; confirm current thresholds with the ATO or a Registered Australian Tax Agent.
- Foreign income is converted to AUD using ATO exchange rates, so a strong AUD can reduce your repayment liability; a weak AUD can increase it [5] [6].
- You must lodge a non-resident tax return Australia or an overseas tax return Australia declaring your worldwide income, calculated using one of three accepted methods [3].
- Getting the income conversion method wrong is a common and correctable mistake, but it requires deliberate attention at lodgment time.
What Is the HECS Compulsory Repayment Obligation for Expats?
A HECS compulsory repayment is a mandatory contribution toward your HELP debt, triggered when your repayment income crosses the ATO’s annual threshold. Before 2017, Australians living overseas could effectively defer their debt indefinitely because the repayment system was tied to the Australian payroll cycle. That changed with legislation requiring overseas-based Australians to self-assess and remit repayments based on worldwide income [4].
For the 2025-26 income year, the minimum HECS repayment threshold sits at $67,000 AUD. This is a significant jump from the 2024-25 income year threshold of $54,435, which matters practically because some expats who were previously caught by the threshold may no longer be, depending on their converted income level. Confirm current thresholds directly with the ATO or a Registered Australian Tax Agent, as these figures are updated annually [4].
Key points on the repayment obligation:
- The obligation applies whether you are an Australian tax resident or a non-resident for tax purposes [2].
- Repayment income includes both Australian-sourced and foreign-sourced income [2].
- Compulsory repayments are calculated as a percentage of repayment income above the threshold, with the rate increasing in bands as income rises [4].
- No repayment is required below the minimum repayment threshold for the 2025-26 income year, regardless of your debt balance. Confirm the current threshold with the ATO or a Registered Australian Tax Agent.
How Does Foreign Currency Income Get Converted to AUD for HECS Purposes?
This is where most expats encounter their first real complexity. Your gross foreign salary is not simply what you report; it must first be translated into Australian dollars using an accepted methodology [3] [6].
The ATO recognises three methods for calculating your foreign income for repayment purposes [3]:
| Method | How It Works | Best Suited For |
|---|---|---|
| Foreign Tax Identifier Method | Uses the income figure from your overseas tax assessment, converted to AUD | Countries with formal annual tax assessments (e.g., UK, USA, Japan) |
| Payslip Method | Uses gross income from payslips, converted using ATO exchange rates at time of payment | Expats without a foreign tax return or assessment |
| Bank Statements Method | Uses deposits as a proxy for income, converted at relevant exchange rates | Self-employed or irregular income earners abroad |
Choosing the right method matters. In some scenarios, the payslip method and the foreign tax identifier method can produce materially different AUD figures for the same underlying foreign salary, purely because of the timing of exchange rate application [3].
Why Do Exchange Rates Create Unpredictable HECS Liabilities?
Building on the conversion methods above, the harder question is what happens when currency markets move. Exchange rate fluctuations significantly influence the translated AUD value of your income, independent of any real change in your purchasing power or financial position [5].
A practical illustration: an Australian expat earning 150,000 Hong Kong dollars per month earns a fixed amount in local terms every year. But if the AUD weakens against the HKD, their AUD-converted income rises, potentially pushing them above the repayment threshold or into a higher repayment band. Conversely, a strong AUD can reduce the converted figure and lower or eliminate the repayment for that year [5].
This dynamic creates a situation where your HECS liability becomes partially a function of macroeconomic conditions rather than your actual financial position. There is no ATO mechanism to hedge against this; the conversion uses published rates and the outcome stands. The practical takeaway is to convert your income early in the lodgment process so you understand where you sit relative to the threshold before finalising any payment strategy.
Additionally, if you use an international bank transfer to remit your compulsory repayment to the ATO, you may lose further value through poor exchange rates charged by banks or intermediaries [1]. Using a currency transfer service optimised for international payments can reduce this friction, though it does not alter the underlying tax calculation.
What Do You Actually Need to Lodge as an Expat With a HECS Debt?
Stepping back from the technical detail, a separate concern is the lodgment itself. Whether you are lodging a non-resident tax return Australia or an overseas tax return Australia as a continuing resident, the process requires you to declare your worldwide income through ATO systems [2].
Practically, this means:
- Accessing myGov or appointing a registered tax agent to lodge on your behalf [2].
- Gathering foreign income documentation: payslips, foreign tax assessments, or bank statements depending on your chosen method [3].
- Applying ATO exchange rates to convert income figures accurately [6].
- Including any Australian-sourced income (rental income, dividends, bank interest) alongside foreign income in the repayment income calculation [2].
- Paying any compulsory repayment amount by the relevant due date to avoid interest charges accruing on the outstanding HELP debt balance [4].
One frequently overlooked point: your tax residency status affects how your return is prepared overall, but it does not eliminate the HECS repayment obligation. Non-residents and residents are treated the same for HELP repayment purposes once worldwide income is declared [4].
Frequently Asked Questions
Does my HECS debt accrue interest while I am overseas?
HELP debt is indexed annually to the Consumer Price Index (CPI), not a commercial interest rate. Indexation applies to the balance each year regardless of your location. It is not “interest” in the traditional sense, but the debt does grow in nominal terms if it is not being repaid.
What happens if I do not declare my overseas income and ignore my HECS repayments?
The ATO can and does pursue outstanding HECS obligations. Penalties and general interest charges can accrue on unpaid compulsory repayments. The ATO has data-sharing arrangements with some foreign tax authorities that improve its visibility of offshore income over time [4].
Can I make voluntary repayments to reduce my HELP debt faster while overseas?
Yes. Voluntary repayments can be made at any time through the ATO’s payment systems and reduce the balance subject to annual indexation. There is no minimum voluntary repayment amount.
Which ATO exchange rate should I use to convert my foreign income?
The ATO publishes foreign exchange rates for use in tax return preparation. These are updated periodically and should be applied to the relevant income period. Using a bank rate or a commercial provider’s rate rather than the ATO’s published rate is a common error that can result in an incorrect repayment figure [6].
I have not filed Australian tax returns for several years. Do I need to fix this before addressing my HECS debt?
Overdue returns need to be lodged before HECS repayment obligations from those years can be properly assessed. Voluntary disclosure through a registered tax agent can help manage any penalties that arise from late lodgment, but the underlying obligation for each year remains [4].
Does the threshold apply to my Australian income only, or my worldwide income?
The threshold applies to your repayment income, which includes both Australian-sourced and worldwide foreign income converted to AUD. Both streams count toward the threshold assessment [4].
I live in a country with a tax treaty with Australia. Does that affect my HECS repayment?
Double tax agreements (DTAs) typically govern how income is taxed between two countries, not how HECS repayment income is assessed. Your worldwide income still counts toward the repayment threshold regardless of DTA status. A Registered Australian Tax Agent can help you understand how your DTA country affects your broader Australian tax return [2].
About ODIN TaxODIN Tax is Australia’s specialist tax agent practice exclusively serving Australian expats and non-residents, with 10,000+ clients across 40+ countries and a 4.9/5 Google rating from over 330 verified reviews. As a Registered Australian Tax Agent headquartered in Hong Kong, ODIN Tax prepares Australian tax returns for non-residents, manages overdue lodgments, handles HECS-HELP obligations for overseas Australians, and provides tax residency and CGT advice for Australians living offshore. Part of the ODIN Group, ODIN Tax works alongside ODIN Mortgage to support Australian expats with property and tax compliance, built around the reality of living and earning overseas, not retrofitted from a domestic practice.
Earning abroad and unsure what your HECS debt is actually costing you this year?
ODIN Tax specialises in Australian expat tax returns, HECS-HELP compliance, and worldwide income assessments across 40+ countries. Speak with a Registered Australian Tax Agent who understands the expat context.
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References
- How to pay back HECS student debt from overseas – Wise (wise.com)
- Overseas Repayments For Australian Expats With HECS … (atlaswealth.com)
- Going Overseas? What Happens To Your HELP Debt Repayments – H&R Block Australia (www.hrblock.com.au)
- The repayment of HECS-HELP and TSL debts by Australians overseas (www.exfin.com)
- How Exchange Rates Affect Repaying Foreign Student Loans (www.wemakescholars.com)
- Foreign Income ATO Exchange Guide 2025 | Nanak Accountants (nanakaccountants.com.au)
