Which country taxes me first, US or Australia?

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Answer

US persons in Australia deal with superannuation characterisation and fund reporting; Australians in the US deal with their own home-country residency exit. One country taxes at source and the other gives credit, and getting that order wrong is what produces double taxation on paper.

Which country goes first

US persons in Australia deal with superannuation characterisation and fund reporting; Australians in the US deal with their own home-country residency exit.

Two of the firm’s advisers at the glass desk in the Delhi office

Where it does not apply

A corridor with heavy professional migration and superannuation on one side that the US system does not recognise the way it recognises domestic plans.

Which country taxes me first, US or Australia?
ItemAmount
Income taxed in both countriesC$92,000
Tax paid abroad (assumed 30%)C$27,600
Home tax on the same income (assumed 43%)C$39,560
Credit available (lesser of the two)C$27,600
Home tax still payableC$11,960

The credit absorbs C$27,600 and leaves C$11,960 payable at home, because the home rate on this income is the higher of the two. The balance is real cash and it is due on the home timetable, which is why instalments get raised in the first meeting.

Example figures throughout, selected to make the rule visible, with rates and thresholds assumed for the demonstration. Your actual filing uses figures confirmed with the issuing authority for your tax year.

How to get this moving

The full treatment — who it binds, the deadline, the penalty and the fixed fee — is on US ↔ Australia cross-border tax. Send us the facts and we will tell you what has to be filed and what it costs.

Reviewed for accuracy for the 2025 and 2026 filing seasons by Udit Gupta, Cross-Border Tax Expert, Legal Quotient Consultants. This is general information rather than advice about your file — a short call is the way to get the second.

US Australia tax treaty — what this page covers

If you came here for US Australia tax treaty, this is where it is dealt with. The subject is US and Australia, and the page covers who it reaches, what then has to be filed, and what we charge to do the work.

Cross-border situations we are engaged for

Case study 1

Fixing the order of relief on a Sydney assignment

A US citizen working in Sydney had computed both returns from the same annual figure and claimed relief for the tax shown on Australian payslips. The claim stopped reconciling once the Australian year was assessed. We built a workday and earnings schedule for the employment, identified the income Australia had the first claim to, and recomputed the US position on tax finally determined rather than tax withheld. The engagement produced a relief claim supported by the Australian assessment, a reconciliation between the two returns, and a schedule the client reuses each year.

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Case study 2

An Australian exit position settled before the first US year

A client leaving Australia for a US role had begun with the US paperwork. We stopped and dealt with the Australian side first, working through the consequences of ceasing residence for the assets held and for the departure year itself. Only then did we compute the first US year, using the exit date to decide which income belonged where. The engagement produced a documented Australian exit position, a first US return built on it, and a record of the basis carried across, so neither filing has to be revisited when the other is examined.

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Case study 3

Characterising superannuation contributions for a US filer

An employee on a long Australian posting had employer superannuation contributions running throughout, and the US returns had simply ignored the fund. We obtained the fund's terms and the contribution history, characterised the arrangement under US rules on its actual features rather than by analogy to a domestic plan, and decided the treatment of contributions and internal earnings. The engagement produced a stated position with the reasoning written up, the returns for the open years computed on that basis, and the fund reporting the characterisation required.

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Case study 4

A relief claim made in the wrong year and refiled

A client had been claiming Australian tax as relief on the US return in the year it was withheld. Because the Australian year closes on a different date, part of each claim belonged to a different US year and the totals never agreed. We re-cut the earnings and tax by month, reallocated each amount to the correct year, and refiled the years that remained open. The engagement produced consistent returns across the period, a claim that ties to the Australian assessments, and a mapping method that removes the problem for later years.

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Case study 5

Reporting for a self-managed fund brought up to date

A client controlled a self-managed superannuation fund and had never reported it on the US side, on the understanding that retirement funds are left alone. We reviewed the deed, the trusteeship and the way the fund was actually run, settled the characterisation, and identified the reporting obligations that followed from it. The engagement produced the fund reporting for the open years, a note explaining the characterisation for the client's own records, and an annual routine keeping the fund accounts and the US filings on the same footing.

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Case study 6

Splitting a clinician's income across a mid-year move

A clinician moved from an Australian hospital post to a US position partway through the year, with Australian income continuing briefly after the move. We allocated earnings by where the work was physically performed rather than by where they were paid, fixed the residence dates on both sides, and computed each return from the same underlying schedule. The engagement produced two returns that agree on the split, relief claimed on the correct side, and a written note of how the move year was treated in case either authority asks.

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Case study 7

A Family Trust Abroad With Reporting on Both Sides

A trust settled in one country and a beneficiary living in another produces reporting for the trust, the settlor and the beneficiary, on different forms and different dates. The engagement maps who files what before anything is prepared.

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Case study 8

Residency Changed Mid-Year and Both Returns Assumed a Full One

A move part-way through a year produces two part-year positions, not two full ones. The engagement establishes the date residence actually changed, allocates income either side of it, and amends whichever return was filed on the wrong footing.

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All case studies — every published engagement in one place.

Core International & Cross-Border Tax Services

International Tax Planning & Advisory

Strategy and compliance for income, assets and families spread across borders.

One coordinating team: filings on every side of the border are sequenced so treaty relief and foreign tax credits are claimed once — and in the right country.

U.S. & Cross-Border Tax Returns

Dual filers: U.S. citizens in Canada and Canadians with U.S. income run two parallel systems — we prepare both, in the right order, every year.

Expat & Emigration Tax

The move year is its own project: the elections and valuations filed that year decide the next decade of both countries’ returns.

Non-Resident Canadian Tax

Default withholding is 25% of gross: elective returns routinely turn over-withheld rent and pensions into refunds.

Transfer Pricing & BEPS

Documentation prepared with the return is the cheapest insurance in international tax; reconstructing it during an audit is the most expensive.

Cross-Border Estates & Trusts

Wills drafted for one country routinely misfire in the other — deemed disposition here, estate tax there, credits in between.

Cross-Border Corporate Tax

Expansion raises the same four questions every time — entity, PE, repatriation, payroll. We answer them before the tax authorities do.

India Tax for NRIs & Returning Residents

The deduction is taken on the sale price, not the gain — which is why an NRI property sale strands cash unless the certificate is applied for before closing.

Canadian Tax with a Foreign Element

Residency is decided on facts, not on a form — and the year you arrive or leave is the one where the largest amounts turn on the smallest details.

UAE Tax for Expats & Their Home Country

A zero-tax country is only half the answer — the question that decides the bill is whether the country you came from still treats you as resident.

Industries & Client Types We Serve Worldwide

Global E-commerce & Marketplaces
Technology & SaaS
Professional Services Firms
Cross-Border Real Estate
Importers, Exporters & Manufacturers
Athletes, Artists & Entertainers
Remote Workers & Digital Nomads
Investment Funds & Holding Companies

Global E-commerce & Marketplaces

  • Foreign VAT / GST / sales tax registrations
  • Marketplace withholding reviews
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  • Multi-currency books reconciled
Explore E-commerce & Marketplaces

Technology & SaaS

Software revenue crosses borders by default — sourcing rules, withholding on licence-like payments and IP location decide the effective rate.

Software revenue is rarely taxed where the team sits. Licence, subscription and service income are characterised differently by each side, and the answer decides withholding at source, treaty relief and whether a foreign customer creates a taxable presence at all — questions that are cheap to settle before the contract and expensive afterwards.

  • Cross-border revenue sourcing & withholding
  • IP structuring with real substance
  • Equity for cross-border teams
  • U.S. expansion: entity & PE setup
Explore Technology & SaaS

Importers, Exporters & Manufacturers

  • Transfer pricing documentation (s.247)
  • Customs value vs transfer price
  • Foreign affiliate reporting (T1134)
  • Country-by-country reporting
Explore Trade & Manufacturing

Athletes, Artists & Entertainers

  • Reg 105 & U.S. CWA agreements
  • Multi-state & country calendars
  • Touring income allocation
  • Royalty & image-rights withholding
Explore Athletes & Entertainers

Remote Workers & Digital Nomads

  • Residency analysis before moving
  • Employer payroll exposure
  • Totalization & social security
  • Foreign tax credits
Explore Remote Workers

Investment Funds & Holding Companies

  • Treaty access & PPT reviews
  • FAPI & surplus computations
  • Withholding-efficient routing
  • Governance & substance
Explore Funds & Holdcos

What people ask us about US and Australia

Does Australia or the US tax my Sydney salary first?

For employment income the country where the work is physically done normally has the first claim, and the other gives relief for tax properly paid there. So salary earned for work performed in Australia is generally taxed there first, with the US return computed afterwards and relief claimed on it. The order matters practically as well as technically: relief depends on tax finally determined on the other side, and the two countries close their tax years on different dates, so the tax paid has to be mapped onto the right year before any credit can be computed.

Is my superannuation taxed by the US while it stays in the fund?

That depends entirely on how the fund is characterised, and it is not safe to assume it is treated the way a domestic US plan is. Superannuation is a creature of Australian law, and the US system does not automatically extend to it the deferral it gives its own retirement arrangements. Depending on characterisation, employer contributions and earnings inside the fund can fall into the US computation in the years they arise, which is out of step with when Australia taxes them. The characterisation is settled on the fund's actual terms and then followed consistently.

Will I get US credit for the Australian tax my employer withheld?

Relief is generally available for foreign tax properly paid on income the other country has the first claim to, but three things decide whether a claim survives scrutiny. Whether the income is of a class Australia was entitled to tax first. Whether the amount claimed is tax finally determined rather than tax withheld during the year. And whether it is matched to the right year on the US side, given that the Australian year does not close on the same date. Withholding shown on a payslip is a starting point, not the claim itself.

I am Australian and moving to the US, does Australia tax me on exit?

Leaving raises its own questions before the US ones begin. Ceasing Australian residence has consequences under Australian rules for the assets you hold and for the year of departure, and those are dealt with on the Australian side in their own right. Deciding the exit position first is what makes the first US year computable, because it fixes the date from which income belongs to the new country and establishes the basis of anything you carry across. Working in the other order is how people end up amending returns in both countries.

Why do my Australian and US tax years not line up?

They close on different dates, which is a mechanical problem rather than a legal one, and it affects every relief claim in this corridor. Income and tax recorded against one country's year have to be re-cut to fit the other's before relief is computed, and payroll summaries are issued to the local year, not the foreign one. In practice that means building a monthly or workday schedule of earnings and tax once and using it for both returns, rather than reconciling two annual summaries that were never designed to agree.

Does a self-managed super fund create US obligations for me?

It raises the characterisation question in its sharpest form, because a self-managed fund is both a retirement arrangement and an entity you control. How it is characterised under US rules decides whether its income is attributed to you as it arises, and it drives fund reporting that applies whether or not any tax results. The analysis turns on the deed, the membership and trusteeship, and how the fund is actually administered, rather than on the label. Settle it before the first US return and follow the same position afterwards.

What is cross-border tax?

Cross-border tax is what applies when income, assets or people touch more than one tax system at once — someone living in one country and earning in another, a company selling or hiring abroad, a family holding property in a second country. The work is rarely one country's rules applied harder; it is reconciling two sets of rules and claiming the relief that stops the same income being taxed twice at full rates. See what we do.

Can I avoid capital gains tax on a foreign property?

Not by virtue of it being foreign — there is no exemption for that, and the "keep it offshore" advice you may have read is how people acquire penalties rather than savings. What genuinely reduces the gain is ordinary and legitimate: principal residence relief where the property qualifies and the designation is made correctly, a properly built cost base including acquisition costs and capital improvements, the timing of the disposition, the treaty rules for real property, and credit for the foreign tax paid. See principal residence and foreign property.

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Where our partners studied — CPA Canada (In-Depth Tax Program), AICPA, the Institute of Chartered Accountants of India and the Malaysian Institute of Accountants.

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