There’s a common misconception that when we head overseas, we leave the Australian tax system behind. The reality is a little more complex.

Australian expat tax isn’t determined by your visa, your citizenship or how long you’ve been gone. It’s assessed against a set of tests that look at your ties, your intentions and your day count, and getting the assessment wrong can be expensive.

Whether you’re about to head overseas for work, already living abroad and still holding Australian assets, or planning a return home, understanding your tax status is crucial.

Here’s what you need to know about tax residency for expats, and how your residency standing impacts your tax, HECS debt overseas and superannuation.

Heading overseas: The residency test trap

Formalising your tax status prior to departure matters more than you might expect.

The ATO uses four tests to determine tax residency for expats. The primary is the resides test, which is based on your physical location, family and economic ties. Supporting this is the domicile test, which takes into account your permanent home by law. This would usually be your country of birth, unless you have proof of a permanent move overseas.

For government workers and their families, there is also the Commonwealth superannuation test, applicable mainly for diplomats and Department of Foreign Affairs and Trade staff.

A proposed Board of Taxation reform would introduce a 183-day test, where you would legally be considered an Australian tax resident if you are physically present in Australia for 183 days or more in a year, even if those days are separated by international trips. This has not yet been legislated, however, so at this stage, the resides and domicile tests remain in place.

Already abroad: The assets left behind
One key consideration if you are already abroad, or planning your departure, is what happens to your assets with a long-term or permanent move.

The first is the CGT main residence exemption trap. Under a proposal introduced in 2020, foreign residents cannot generally claim the CGT main residence exemption when selling a primary home in Australia. This means that you would lose the exemption for the full ownership period, not just any years spent overseas.

Have a family member with a HECS or HELP debt? That doesn’t disappear and will continue to apply based on worldwide income regardless of residency. As of the 2025–26 financial year, the repayment threshold sits at $67,000 and repayments are calculated on a marginal basis rather than a flat percentage.

Coming home: The potential super blow
Without diligence, there may also be additional super taxes waiting when you return to Australia.

Division 296 is the superannuation tax introduced from 1 July this year. It’s a two-tier system that includes an additional 15% tax for super balances between $3 million and $10 million, and an additional 25% on earnings above $10 million.

The tax applies only to the proportion of your super balance above the $3 million threshold, with existing tax rates remaining in place for the remainder.

It’s one to watch, however. If you set and forget your super, it may grow past the threshold while you’re away, but a review of your super strategy before departure will help you optimise your tax position.

The common thread

Whether you’re looking at heading overseas, already abroad or planning a return, none of these decisions sits in isolation, which is why understanding non-resident tax is so important.

The ATO’s tax residency test will determine your residency status. And the result will impact your eligibility for the CGT main residence exemption, any overseas HECS debt and your superannuation.

Err on one level, and it can have a cascade effect, leaving you with an unexpected and unwelcome tax debt – but that can be avoided with considered and strategic financial planning.

Expert guidance for Australian expat tax

At Newealth, we provide comprehensive financial planning tailored to your life stage, investment goals and current situation, whether here or overseas.

By taking a holistic approach to your expat tax obligations, CGT, HECS debt, super and investment strategy, we’ll help ensure you have clarity around every tax obligation and financial decision.

If you’re planning a move, why not have a confidential chat with us. That way, you can head overseas with a clear picture of your finances and no unexpected surprises.

General Advice Warning:

The information in this blog is general in nature and does not take into account your personal objectives, financial situation or needs. You should consider whether the information is appropriate for you and seek professional advice before making any financial decisions.
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