Australian Tax Residency and Overlapping Hong Kong Obligations: Breaking Double Taxation

For the Hong Kong professional who has accepted a secondment to Sydney, or the Australian expatriate who built a career in Hong Kong and is now weighing a return to Melbourne, the tax consequences of the move are rarely the first priority. They should be. The Australian Tax Office (ATO) has, since the 2023-2024 income year, significantly tightened its scrutiny of individuals who leave Australia, particularly those who maintain a home, family ties, or business interests there. Simultaneously, the Hong Kong Inland Revenue Department (IRD) continues to apply its strict territorial source principle, which can create a dangerous gap: a taxpayer may be considered a resident for tax purposes in both jurisdictions simultaneously, or worse, in neither. The 2025 Federal Budget in Australia proposed further funding for the ATO’s residency compliance taskforce, signalling that the window for clean exits and clear planning is narrowing. For the Hong Kong-based professional earning AUD 200,000 from an Australian employer while living in Sai Kung, the overlapping obligations—and the potential for double taxation—are not theoretical. They are a matter of which tax authority gets paid first, and how much.

The Australian Residency Test: More Than 183 Days

Australia’s tax residency framework is governed by ordinary concepts of residency at common law, supplemented by the statutory “resides test” and the “domicile test” in the Income Tax Assessment Act 1936 (ITAA 1936). For a Hong Kong resident moving to Australia—or an Australian returning home—the ATO will first ask whether the individual resides in Australia according to ordinary meaning. This is a question of fact, assessed against factors such as physical presence, frequency and duration of visits, and the purpose of the stay.

The Domicile Test and the “Permanent Place of Abode” Exception

If the individual does not physically reside in Australia, the ATO applies the domicile test. Under ITAA 1936 s 6(1), an individual is an Australian resident for tax purposes if their domicile is in Australia, unless the Commissioner is satisfied that the taxpayer has a “permanent place of abode” outside Australia. This is the provision that most frequently traps Hong Kong professionals.

The ATO’s interpretation, set out in Taxation Ruling IT 2650, requires that the overseas place of abode be permanent in the sense of intended to be enduring, not merely temporary. A Hong Kong flat leased for a two-year secondment, with the family remaining in Sydney, will almost certainly fail this test. The ATO will examine the location of the taxpayer’s family, the retention of a home in Australia, the storage of personal effects, and the frequency of returns.

The 2023 Full Federal Court decision in Harding v FCT [2023] FCAFC 87 reinforced this principle. The taxpayer, a mining executive who worked in Africa for several years but maintained a house in Perth where his wife and children lived, was held to be an Australian resident. The court found that the “permanent place of abode” exception requires a complete severance of residential ties with Australia—not merely a reduction in physical presence.

The 183-Day Rule and the Superannuation Trap

The statutory 183-day test under ITAA 1936 s 6(1)(a)(ii) is a second, independent test. An individual who is physically present in Australia for more than 183 days in an income year (1 July to 30 June) is an Australian resident, unless the Commissioner is satisfied that the individual’s usual place of abode is outside Australia and they do not intend to take up residence in Australia.

For the Hong Kong resident who spends six months and one week in Australia across two trips—perhaps Christmas and the summer holidays—this test can be triggered inadvertently. The ATO counts total days of physical presence, not continuous stay. A taxpayer who flies to Sydney for 90 days, returns to Hong Kong for 30 days, then flies back for another 100 days has exceeded the 183-day threshold.

The consequences extend beyond income tax. An Australian resident for tax purposes is generally required to make compulsory superannuation contributions on their Australian-sourced employment income, and the concessional contributions cap (AUD 30,000 for the 2024-2025 income year) applies. More critically, the individual may be required to maintain an Australian superannuation fund, which carries its own tax and reporting obligations.

Hong Kong Territorial Source: The Offshore Claim and Its Limits

Hong Kong’s Inland Revenue Ordinance (Cap. 112) (IRO) taxes only income arising in or derived from Hong Kong. For employment income, the source is determined by where the services are rendered. If a Hong Kong resident performs all duties outside Hong Kong, the income is offshore and not subject to Hong Kong salaries tax, even if the employer is Hong Kong-based.

The “Services Rendered” Test and the 60-Day Rule

The IRD’s Departmental Interpretation and Practice Notes (DIPN) No. 21 provides guidance on the source of employment income. Where an individual performs duties partly in and partly outside Hong Kong, the IRD apportions income based on the number of days spent in Hong Kong for work purposes. The 60-day rule under IRO s 8(1A)(c) provides a de minimis exemption: if all duties relating to the employment are performed outside Hong Kong, and the individual visits Hong Kong for no more than 60 days in the basis period, the entire income is treated as offshore.

This rule is a powerful planning tool for the Australian executive who bases themselves in Hong Kong but travels extensively. However, the IRD examines the substance of the arrangement. An individual who maintains a Hong Kong apartment, holds a Hong Kong employment contract, and receives salary into a Hong Kong bank account, but who spends 200 days per year in Australia, will face scrutiny. The IRD may argue that the employment is Hong Kong-sourced because the employment contract is governed by Hong Kong law, the employer is Hong Kong-based, and the individual’s “base” is Hong Kong.

The Double Trap: Resident in Both, Taxed on Everything

The most dangerous scenario for the cross-border professional is being treated as a tax resident of both Australia and Hong Kong simultaneously. Australia taxes its residents on worldwide income. Hong Kong taxes only Hong Kong-sourced income, but if the individual is considered a Hong Kong resident for the purposes of the Australia-Hong Kong Double Taxation Agreement (DTA), the tie-breaker rules in Article 4 of the DTA apply.

Article 4(2) provides a hierarchy of tests to determine a single residence: permanent home, centre of vital interests, habitual abode, and nationality. For the Hong Kong-based professional who maintains a home in both jurisdictions, the centre of vital interests—where the individual’s personal and economic relations are closer—is the decisive factor. The IRD and ATO will examine the location of the individual’s family, bank accounts, investments, club memberships, and business interests.

If the tie-breaker rules place residence in Australia, the individual is subject to Australian tax on worldwide income, but can claim a foreign tax credit for Hong Kong tax paid on Hong Kong-sourced income under Article 22 of the DTA. The credit is limited to the Australian tax payable on that income. If the Hong Kong tax rate (a maximum of 15% for salaries tax under the standard rate) is lower than the Australian rate (up to 45% plus the 2% Medicare levy), the individual will owe the difference to the ATO.

Structuring the Exit: Practical Steps for 2025-2026

For the Hong Kong resident who is genuinely moving to Australia—or the Australian returning home—the planning must begin at least 12 months before the move. The ATO’s compliance focus on residency, announced in the 2024-2025 Federal Budget, includes dedicated resources to audit individuals who claim non-residency while maintaining Australian ties.

Severing Australian Ties: The Checklist

To establish a permanent place of abode outside Australia, the taxpayer should:

• Sell or lease the Australian home on a long-term basis (at least three years). A short-term lease of six months, with personal effects stored in Australia, will not satisfy the ATO.
• Transfer or close Australian bank accounts, or convert them to non-resident accounts. The ATO can access bank records under the Common Reporting Standard (CRS).
• Cancel Australian private health insurance. While this may trigger the Lifetime Health Cover loading on return, it is a necessary step to demonstrate non-residence.
• Register with the ATO as a non-resident and cease making superannuation contributions. The ATO’s online portal allows individuals to update their residency status.

The 2024 ATO guidance, Residency – What We Look At, explicitly states that the retention of a “home available for use” in Australia is a strong indicator of continued residence. A property that is left vacant, or occupied by adult children who pay no rent, will be treated as the taxpayer’s home.

The Hong Kong Side: Protecting the Offshore Claim

For the Hong Kong resident who will continue to earn income from Hong Kong while living in Australia, the structure of the employment arrangement is critical. The IRD will examine whether the employment is genuinely Hong Kong-sourced. To protect the offshore claim:

• The employment contract should specify that the duties are performed outside Hong Kong. A clause stating that the employee is “seconded to Australia” or “based in Sydney” is helpful.
• The employer should not require the employee to attend meetings in Hong Kong. Any days spent in Hong Kong for work purposes will trigger apportionment.
• The salary should be paid into an Australian bank account, not a Hong Kong account. The IRD has access to Hong Kong bank records under the CRS.

If the individual is a Hong Kong permanent resident who will spend more than 60 days in Hong Kong in a tax year, the IRD will apportion the salary. The Hong Kong tax payable on the Hong Kong portion is creditable against Australian tax, but the compliance burden is significant.

The Superannuation and Exit Tax Issue

Australian superannuation is a particular trap for the Hong Kong resident who has accumulated a balance in an Australian fund. If the individual ceases to be an Australian resident for tax purposes, the superannuation fund is generally required to withhold tax on the withdrawal under the Departing Australia Superannuation Payment (DASP) rules. The withholding rate is 35% for the taxable component (if the individual has held the visa for less than five years) or up to 47% for the untaxed element.

However, if the individual remains an Australian resident for tax purposes—because they have not severed ties—the superannuation remains in the fund and continues to accrue earnings, which are taxed at 15% within the fund. The individual cannot access the superannuation until retirement age, and the ATO will continue to treat the fund as an Australian asset.

For the Hong Kong resident who is also a US citizen or green card holder, the interaction of Australian, Hong Kong, and US tax law creates a third layer of complexity. The US-HK Double Taxation Agreement does not cover Australian tax, and the US-Australia DTA contains its own tie-breaker rules. A taxpayer in this position should expect to file tax returns in all three jurisdictions.

The Double Taxation Agreement: Article 22 and the Foreign Tax Credit

The Australia-Hong Kong DTA, which entered into force in 2019, provides the mechanism for eliminating double taxation. Article 22(1) provides that Australian residents may claim a foreign tax credit for Hong Kong tax paid on income that is also taxable in Australia. The credit is limited to the Australian tax attributable to that income.

The Limitation: Source-Based vs. Worldwide Taxation

The critical limitation is that the DTA does not convert Hong Kong’s territorial system into a worldwide system. If an individual is an Australian resident under the tie-breaker rules, they are subject to Australian tax on worldwide income. The Hong Kong tax paid on Hong Kong-sourced income is creditable, but the Hong Kong tax paid on offshore income—income sourced in a third country—is not creditable against Australian tax.

For the Hong Kong resident who earns passive income from a BVI company, or who has a rental property in Thailand, the DTA provides no relief. The Australian tax on that income must be paid in full, with no credit for any Hong Kong tax that may have been paid (and in most cases, no Hong Kong tax will have been paid because the income is not Hong Kong-sourced).

The Practical Operation: Claiming the Credit

To claim the foreign tax credit, the taxpayer must:

• File an Australian tax return as a resident.
• Declare all worldwide income, including Hong Kong salaries, rental income from Hong Kong property, and Hong Kong bank interest.
• Attach a schedule showing the Hong Kong tax paid, with a copy of the Hong Kong tax assessment.
• Calculate the Australian tax on the Hong Kong income and claim the credit up to that amount.

The ATO’s Foreign Income Tax Offset Rules (FITO) are complex. The credit is non-refundable, meaning it cannot exceed the Australian tax liability. If the Hong Kong tax paid is higher than the Australian tax on that income, the excess is lost.

Actionable Takeaways

1. Sever Australian ties before the move: Sell or long-term lease the Australian home, close bank accounts, and cancel health insurance at least six months before the income year in which you claim non-residence.
2. Count your days in Australia: Any physical presence exceeding 183 days in an Australian income year (1 July to 30 June) triggers the statutory residency test, regardless of your intentions.
3. Structure Hong Kong employment for offshore treatment: Ensure the employment contract specifies duties performed outside Hong Kong, and pay salary into an Australian bank account to support the offshore claim.
4. Apply the DTA tie-breaker rules proactively: If you maintain homes in both jurisdictions, document your centre of vital interests—family location, bank accounts, and business ties—to establish which country is your tax residence.
5. File in both jurisdictions and claim the credit: An Australian resident for tax purposes must declare worldwide income, but can claim a foreign tax credit for Hong Kong tax paid on Hong Kong-sourced income under Article 22 of the DTA.

本文不構成稅務建議。涉及個人稅務情況請諮詢持牌會計師或稅務師。 / This does not constitute tax advice. Consult a licensed CPA or tax advisor for your specific situation.