TL;DR: Key Takeaways
- Non-residents can legally hold an ABN and must include Australian-sourced ABN income in an Australian tax return [1].
- ABN withholding tax applies when a payer cannot sight a valid ABN, resulting in deductions at the top rate that only a lodged return can reclaim.
- Income earned entirely offshore through an ABN is generally not taxable in Australia for non-residents, but the source-of-income test requires careful analysis [1].
- GST registration becomes mandatory once relevant turnover exceeds $75,000 per year for the relevant financial year, irrespective of residency status [2].
- Failing to lodge a non-resident tax return in Australia when required exposes you to failure-to-lodge penalties and compounding interest charges.
Who Can Hold an ABN as a Non-Resident of Australia?
Residency status does not disqualify a person or entity from holding an Australian Business Number. The eligibility test is whether you are carrying on, or intending to carry on, an enterprise in Australia. That enterprise test applies equally to foreign nationals and to Australian citizens living overseas [2]. What changes for non-residents is not the right to hold an ABN, but the tax treatment of the income that flows from it [1].
Foreign nationals investing in Australian property or operating Australian-facing businesses frequently register for an ABN as part of their compliance setup [3]. Equally, an Australian expat running a consulting practice or providing services to Australian clients will often retain their ABN after departing Australia. In both cases, the ABN itself is simply an identifier. The Australian Taxation Office’s (ATO) interest is in what income that ABN generates, and from where [5].
What Is ABN Withholding Tax and When Does It Apply?
ABN withholding tax is the mechanism the ATO uses to prevent income from slipping through the system untaxed. When an Australian business pays another entity for services and that entity fails to quote a valid ABN, the payer is legally required to withhold tax from the payment at the top marginal rate applicable for the relevant financial year [5]. This is not a penalty. It is a prepayment of tax collected at source.
For a non-resident holding an ABN, this creates a practical trap:
- You perform work for an Australian client.
- Your invoice quotes your ABN correctly, and no withholding occurs.
- But if your ABN registration lapses, or a payer fails to properly record it, withholding applies.
- The withheld amount sits with the ATO and can only be reclaimed by lodging an Australian tax return for non-residents.
This means ABN withholding tax is, in many cases, the event that triggers a lodgment obligation that the non-resident did not anticipate. The withholding does not settle the liability. It creates a credit, and claiming that credit requires a lodged return.
Does All ABN Income Create an Australian Tax Obligation for Non-Residents?
Building on the withholding framework above, the harder question is whether the underlying income itself is taxable in Australia in the first place. The answer turns entirely on where the income is sourced, not where the ABN holder lives.
Under Australian tax law, non-residents are taxed only on Australian-sourced income [1]. The general rule works as follows:
| Income Scenario | Australian-Sourced? | Taxable in Australia for Non-Resident? |
|---|---|---|
| Services performed physically in Australia for an Australian client | Yes | Yes |
| Services performed entirely overseas for an Australian client | Generally No | Generally No [1] |
| Rent from an Australian property managed via an ABN | Yes | Yes |
| Digital products sold to Australian customers from overseas | May be partially Australian-sourced | Depends on the facts; GST obligations may also arise [2] |
| Services performed overseas for a non-Australian client | No | No [1] |
The source-of-income question is not always straightforward. Where a contract is partly performed in Australia and partly overseas, income may need to be apportioned. This is a technical area where specialist Australian expat tax advice is essential.
When Does an ABN Holder Become Liable for GST?
Stepping back from the income tax question, a separate concern is GST. GST registration is mandatory once annual turnover from an enterprise connected with Australia exceeds $75,000 for the relevant financial year [2]. This threshold applies regardless of whether the ABN holder is a resident or a non-resident.
Key points for non-residents to understand:
- Non-resident businesses supplying digital services or goods to Australian consumers may be caught by the GST rules even if they have no physical presence in Australia [2].
- Once registered, quarterly or annual Business Activity Statement (BAS) lodgments are required.
- Failing to register when required, or failing to lodge BAS returns, attracts ATO penalties independently of any income tax obligation.
What Are the ABN Compliance Changes Non-Residents Should Know in 2026?
A related but distinct question is whether holding an ABN passively, without actively running a business through it, creates its own risk. The answer is increasingly yes. The Australian Government has released draft legislation aimed at strengthening ABN compliance requirements, placing greater obligations on ABN holders to demonstrate that their registration remains active and legitimate [4].
Under the proposed changes, ABN holders who fail to meet annual income tax return lodgment obligations may have their ABN cancelled [4]. For non-residents who hold an ABN but have not filed an Australian tax return for non-residents in recent years, this compliance shift raises real exposure. An ABN cancellation is not the end of the story. It may prompt ATO review of prior years and trigger contact about unfiled returns.
How Should a Non-Resident Structure Their ABN Filing Obligations?
Practical compliance for a non-resident ABN holder follows a clear sequence:
- Determine source of income: Establish whether your ABN income is Australian-sourced. If it is, a tax return is required.
- Check for withholding tax credits: If any payer withheld ABN withholding tax during the year, you must lodge to reclaim it.
- Assess GST obligations: If turnover from Australian-connected supplies exceeds $75,000 in the 2025-26 financial year, GST registration and BAS lodgments are mandatory [2].
- Apply the correct non-resident tax rates: Non-residents are taxed at different rates to residents for the relevant financial year, and are not entitled to the tax-free threshold. Rates for the 2025-26 financial year should be confirmed with a Registered Australian Tax Agent.
- Review any applicable Double Tax Agreement (DTA): If you pay tax on this income in your country of residence, Australia’s DTA network may provide relief. This requires a formal assessment.
- Address overdue years first: If returns are outstanding, resolving these proactively is materially better than waiting for ATO contact.
Frequently Asked Questions
Do I need to lodge an Australian tax return as a non-resident if I hold an ABN but earned nothing in Australia?
If you had no Australian-sourced income and no ABN withholding tax credits during the financial year, you may not need to lodge. However, maintaining an ABN without lodging income tax returns is increasingly subject to ATO scrutiny under proposed compliance reforms [4]. Confirm your position with a Registered Australian Tax Agent.
Can I cancel my ABN if I am no longer operating in Australia?
Yes. If you are no longer carrying on an enterprise with an Australian connection, you should cancel your ABN. Holding it without a genuine business purpose creates unnecessary compliance risk [5].
What happens if a payer withheld ABN withholding tax from my invoice?
The withheld amount is held by the ATO as a tax credit. You can only claim it back by lodging an Australian tax return for non-residents for the relevant financial year. If you do not lodge, the credit is forfeited.
Is Australian expat tax advice different from standard Australian tax advice?
Significantly different. Non-resident tax rates, source-of-income rules, the absence of the tax-free threshold, CGT rules, and DTA applications are all specific to non-residents. Specialist tax agents understand these distinctions, while generalist practitioners may produce incorrect outcomes for expat clients.
Does GST apply to my ABN income if I am overseas?
It depends on whether your supplies are connected with Australia and whether your turnover exceeds the $75,000 threshold for the relevant financial year. Digital services supplied to Australian consumers can be caught even without a physical Australian presence [2].
How many years back can the ATO pursue unfiled non-resident tax returns?
The ATO has broad powers to pursue unfiled returns and can go back many years. Penalty and interest charges accumulate over time. Proactive voluntary lodgment of overdue returns is consistently the better outcome than waiting for ATO-initiated contact.
Can I use a Double Tax Agreement to eliminate my Australian tax on ABN income?
A DTA can reduce or eliminate double taxation, but it does not override Australia’s right to tax Australian-sourced income. Each DTA operates differently. The correct application depends on your specific country of residence and the nature of the income. A formal assessment by a Registered Australian Tax Agent is required.
About ODIN Tax
ODIN Tax is Australia’s specialist tax agent practice for Australian expats and non-residents, and part of ODIN. As a Registered Australian Tax Agent headquartered in Hong Kong, ODIN Tax has prepared tax returns and resolved complex non-resident tax situations for 2,300+ Australians across 40+ countries. The practice covers every aspect of non-resident Australian tax compliance relevant to this article: Australian tax return preparation for non-residents, ABN and GST compliance, source-of-income analysis, Double Tax Agreement applications, overdue lodgment resolution, and CGT advice for property and shares. For non-residents navigating ABN obligations who want specialist advice, not generic answers, ODIN Tax is built specifically for that need.
Not sure whether your ABN income triggers an Australian filing obligation?
ODIN Tax works exclusively with Australian non-residents and expats on exactly these questions. Get clarity from specialists who handle this every day.
References
- ABN & GST Registration Australia – Aus Business Register (ausbusinessregister.com.au)
- Changes to Australian Business Number (ABN) registration compliance – Murdoch Partners (www.murdochpartners.com.au)
- Register for an Australian Business Number | business.gov.au (business.gov.au)
