U.S. taxes in Australia: superannuation, FTC, and what you really need to file

Australia tax overview — high rates mean FTC is the dominant strategy

Australia operates a progressive income tax system administered by the Australian Taxation Office (ATO). For the 2024-25 financial year, the tax brackets for Australian residents are: 0% on income up to AUD $18,200 (the tax-free threshold); 19% on income from $18,201 to $45,000; 32.5% on income from $45,001 to $120,000; 37% on income from $120,001 to $180,000; and 45% on income above $180,000. On top of income tax, the Medicare Levy of 2% applies to most taxpayers, bringing the effective top marginal rate to 47%.

These rates are high enough that most 🇺🇸 Americans working in Australia — particularly those at middle or upper income levels — generate more than enough Australian tax to fully offset their U.S. tax liability through the Foreign Tax Credit. The effective Australian rate on most professional incomes (say, AUD $80,000 to $200,000) ranges from approximately 25% to 40% including the Medicare Levy. The comparable U.S. effective rate on the same income is generally lower, meaning Australian FTC credits fully eliminate U.S. income tax on Australian-source earned income.

Australia's tax year runs from July 1 to June 30 — not the calendar year. This creates a mismatch with the U.S. January-through-December tax year, similar to the UK situation. When claiming the FTC, you must decide whether to use the accrual method (credit Australian taxes accrued in the U.S. tax year the income was earned) or the paid method (credit Australian taxes actually paid in a given U.S. year). Documentation of this choice and consistent application year over year is important.

Superannuation — the single biggest U.S. compliance issue for 🇺🇸 Americans in Australia

Superannuation Guarantee — the mandatory employer contribution

Under the Superannuation Guarantee, Australian employers are currently required to contribute 11.5% of an eligible employee's ordinary time earnings into a complying superannuation fund (rising to 12% from July 2025). For an American earning AUD $100,000 per year, this means the employer must contribute approximately AUD $11,500 annually into a super fund on that employee's behalf.

Under Australian tax law, these employer contributions are not included in the employee's assessable income — the employee does not pay income tax on employer super contributions at the time they are made (they are taxed at the fund level at the concessional rate of 15%). This is similar to how 401(k) employer matching contributions are not current income to U.S. employees.

For U.S. tax purposes, the analysis is fundamentally different and unfavorable:

• Current taxation of employer contributions: Employer contributions to an Australian super fund on a U.S. person's behalf may be currently taxable to that person as compensation income. The IRS has not provided definitive published guidance on this specific point, but many practitioners take the conservative position that these contributions are current-year U.S. taxable income, similar to how employer contributions to a foreign pension may be taxable if the plan does not meet U.S. qualified plan requirements.
• No U.S. tax deferral on fund growth: Inside a super fund, investment earnings are taxed at 15% by Australia. For U.S. purposes, these earnings may be currently taxable to the U.S. account holder, without deferral — similar to how earnings in a non-qualified foreign trust are taxed currently.
• Form 3520 and 3520-A requirements: If the super fund is characterized as a foreign grantor trust, the fund itself (the trustee of the fund on your behalf) must file Form 3520-A annually (Annual Information Return of Foreign Trust with a U.S. Owner). You as the grantor-owner must file Form 3520 annually to report transactions with the trust — including contributions and distributions. The failure-to-file penalty for Form 3520 is 35% of the gross reportable amount.

Self-Managed Super Funds (SMSFs)

Some 🇺🇸 Americans in Australia establish or participate in Self-Managed Super Funds — where the members are also the trustees. For U.S. tax purposes, an SMSF that is controlled by the U.S. person creates an even stronger argument for grantor trust treatment, since the same individual is both the beneficial owner and the trustee. SMSF participants face all the same Form 3520/3520-A obligations as industry or retail fund members, potentially with greater clarity about the trust characterization.

PFIC issues within super funds

Super funds typically invest in Australian and international managed funds, exchange-traded funds, and other investment vehicles. Many of these investments may be Passive Foreign Investment Companies (PFICs) under U.S. tax law. If so, the PFIC rules apply to gains and distributions from those holdings, creating additional annual reporting (Form 8621 for each PFIC holding) and potentially punitive taxation on excess distributions and dispositions. The combination of foreign grantor trust reporting and PFIC taxation makes Australian super among the most complex foreign retirement vehicles from a U.S. compliance perspective.

The practical picture for most 🇺🇸 Americans

Most 🇺🇸 Americans working in Australia are enrolled in industry super funds (like AustralianSuper, HESTA, or Hostplus) or retail super funds (like REST, Sunsuper, or MLC MasterKey). They have not chosen to be in these funds — enrollment is automatic and mandatory. This involuntary nature of super participation does not eliminate U.S. reporting obligations, but it is relevant context when discussing reasonable cause for non-filing penalties.

Withdrawals from super in retirement

When an Australian super fund member reaches preservation age (currently 60) and retires, withdrawals from super are generally tax-free in Australia. For U.S. purposes, the tax treatment of super withdrawals depends on how the fund has been characterized throughout — and on any basis attributable to previously-taxed contributions. This is another reason why the upfront characterization and reporting of the super fund from the beginning of employment in Australia matters so much. Getting it wrong early creates compounding problems at retirement.

US-Australia tax treaty — key provisions

The Convention Between the Government of Australia and the Government of the United States of America for the Avoidance of Double Taxation and the Prevention of Fiscal Evasion with Respect to Taxes on Income (colloquially, the US-Australia tax treaty) entered into force in 1983 and has been updated by protocols. It provides a strong framework for preventing double taxation between the two countries.

Key provisions relevant to American expats

• Residency and tie-breaker: Article 4 provides tie-breaker rules to determine which country has primary tax residence when both the U.S. and Australia claim a taxpayer. For 🇺🇸 Americans clearly resident in Australia, Australia generally has primary taxing rights, with the U.S. retaining residual citizenship-based taxing rights.
• Dividends: Australian-source dividends paid to U.S. residents face reduced Australian withholding tax of 15% (or 0% for certain unfranked dividends). U.S.-source dividends paid to Australian residents face 15% U.S. withholding.
• Interest: Cross-border interest payments between the two countries face 10% withholding under the treaty (reduced from the domestic 10% Australian withholding in many cases).
• Capital gains: The treaty generally does not limit either country's right to tax capital gains arising in its territory. Australian real estate gains are taxable by Australia. The U.S. taxes its citizens on worldwide capital gains.
• Pensions: Article 18 covers pensions and annuities. Pensions and annuities paid by Australia or by Australian superannuation funds are generally taxable in the country where the recipient resides. The treaty pension provisions are limited and do not comprehensively address the U.S. treatment of Australian super during the accumulation phase.
• Government service: Remuneration for U.S. government service is generally taxable only in the U.S., not in Australia — relevant for government contractors, military, and diplomatic personnel stationed in Australia.

Superannuation and the treaty gap

One of the most significant limitations of the US-Australia treaty for American expats is what it does not say about superannuation. The treaty does not contain provisions analogous to the US-UK treaty's Article 18 pension protections for employer pension contributions, nor does it specifically address the treatment of Australian super funds from a U.S. tax perspective. This treaty gap is why the super compliance burden falls entirely on U.S. domestic tax law analysis — leading to the difficult position described above.

FTC vs FEIE strategy in Australia

As with other high-tax countries, the Foreign Tax Credit is the dominant — and in most cases clearly superior — strategy for 🇺🇸 Americans in Australia compared to the Foreign Earned Income Exclusion.

Why FTC wins in Australia for most earners

At Australian incomes above approximately AUD $80,000-$100,000, the Australian income tax rate (including Medicare Levy) on the marginal dollar exceeds the comparable U.S. marginal rate. Even at lower income levels, the combined Australian effective rate frequently matches or exceeds U.S. rates. The FTC therefore typically eliminates U.S. income tax entirely on Australian-source earned income, with excess credits potentially carrying forward to future years.

FEIE, by contrast, caps exclusions at $130,000 (2025 limit). For 🇺🇸 Americans earning AUD $120,000+ (approximately USD $80,000+), FEIE may not fully shelter all income. And using FEIE means giving up FTC on the excluded amount — no credits are generated, nothing carries forward, and the switching rules (5-year prohibition on returning to FEIE after revocation) create long-term inflexibility.

When FEIE might be considered for Australia

Very few situations justify FEIE over FTC for 🇺🇸 Americans in Australia. Possible exceptions include 🇺🇸 Americans earning below the Australian tax-free threshold (below AUD $18,200, where Australian income tax is zero and no FTC is generated), or 🇺🇸 Americans in their first partial year in Australia before they accumulate meaningful Australian tax. In all other standard employment situations, FTC is the correct choice.

FBAR for Australian accounts — CBA, ANZ, Westpac, NAB, and super fund accounts

🇺🇸 Americans living in Australia must file an FBAR (FinCEN Form 114) if their combined foreign financial account balances exceed $10,000 at any point during the calendar year. For 🇺🇸 Americans working in Australia and receiving an Australian salary, this threshold is crossed almost immediately — a month's salary in an Australian bank account will typically exceed AUD $10,000 (approximately USD $6,500 to $7,000), and most salaries will push the account above the USD $10,000 threshold within one to two months.

Australian financial accounts commonly requiring FBAR reporting:

• Australian bank accounts:
  • Commonwealth Bank of Australia (CBA / CommBank) — transaction accounts, savings accounts, term deposits
  • ANZ Bank — all personal and business accounts
  • Westpac Banking Corporation — all account types
  • National Australia Bank (NAB) — all account types
  • Bank of Queensland, Bendigo Bank, ING Australia, Macquarie Bank, and any other Australian banking institution
• Online and neobanks: Up Bank, 86 400, and similar digital banking platforms are still foreign financial accounts and require FBAR reporting.
• Australian brokerage accounts: Accounts held with CommSec, Nabtrade, IG Markets, or other Australian stockbrokers or investment platforms are reportable if balances exceed the threshold.
• Superannuation fund accounts: Super fund account balances are reportable on FBAR if the combined total of all foreign accounts — including super — exceeds $10,000. An industry super fund balance of AUD $15,000 (a very early-career accumulation) at any point in the year triggers the FBAR filing requirement for the year, even if the bank account balance is below $10,000. Combined, most 🇺🇸 Americans in Australia will have balances far exceeding the threshold.
• Offset accounts: Australian mortgage offset accounts are bank accounts for FBAR purposes and are reportable if part of the combined threshold calculation.

The FBAR is filed at bsaefiling.fincen.treas.gov, not with your tax return. The April 15 deadline has an automatic no-request extension to October 15. Willful non-filing penalties can reach the greater of $100,000 or 50% of account balances per violation per year. Australia has an intergovernmental FATCA agreement under which Australian financial institutions report U.S. account holders to Australian tax authorities, who share the information with the IRS. This means the IRS typically has independent visibility into Australian bank accounts — non-reporting creates a particularly high-risk position.

Medicare levy and U.S. self-employment tax — totalization applies

Australia's Medicare Levy (2% of taxable income) funds the public health system. It is charged as part of the individual income tax assessment and applies to most Australian residents. For purposes of the Foreign Tax Credit, the Medicare Levy is generally treated as an income tax and is creditable as a foreign tax against U.S. income tax liability on the same income.

For U.S. self-employment tax (which covers Social Security and Medicare at 15.3% of net self-employment income), the US-Australia totalization agreement provides important relief. The United States and Australia have a totalization agreement (effective since 2002) that prevents dual social security taxation:

• Employees: If you work in Australia as a local employee, you and your employer pay into the Australian superannuation system (and Australian Medicare). You are generally exempt from U.S. Social Security and Medicare taxes on the same wages.
• Self-employed: Self-employed 🇺🇸 Americans in Australia pay Australian Medicare Levy and Superannuation contributions. Under the totalization agreement, they are generally exempt from U.S. self-employment tax (Social Security and Medicare) on the same income. This is significant — without totalization, a self-employed American in Australia could owe both Australian Medicare and U.S. SE tax on the same earnings.
• U.S. employer secondments: 🇺🇸 Americans seconded to Australia by a U.S. employer for a temporary period may remain covered by the U.S. Social Security system and be exempt from Australian superannuation guarantee and Medicare Levy contributions. A Certificate of Coverage from the Social Security Administration documents this status.

Capital gains — timing differences, CGT discount, and U.S. treatment

Australia's capital gains tax (CGT) system differs significantly from the U.S. system in ways that create complications for American expats, particularly the 50% CGT discount and the different definition of what constitutes the CGT event.

Australia's 50% CGT discount — not available to U.S. persons

Australia provides a 50% CGT discount for assets held by Australian residents for more than 12 months. This means only 50% of the capital gain is included in assessable income for Australian tax purposes. An Australian resident who sells shares held for more than 12 months with a $100,000 gain includes only $50,000 in assessable income and pays tax on that $50,000 at their marginal rate.

For U.S. tax purposes, this discount does not exist. The U.S. taxes the full $100,000 gain. The U.S. long-term capital gains rates (0%, 15%, or 20% depending on income) apply to the full gain — not half of it. The Australian CGT paid, calculated on only $50,000 of the gain, may not provide enough FTC to fully offset the U.S. tax on $100,000.

This mismatch is a genuine double-taxation risk. Example:

In this example, the FTC happens to exceed the U.S. tax, so there is no U.S. residual liability. But the relationship between Australian CGT on 50% of the gain and U.S. tax on 100% of the gain is sensitive to the taxpayer's marginal rate, income level, and other FTC positions. At lower income levels where Australian CGT is low (32.5% rate) and U.S. CGT is 15%, the math can produce a genuine residual U.S. liability not fully covered by the Australian FTC.

Timing of CGT events

Australia's CGT system recognizes the gain at the time of the CGT event — typically the contract date for sale of real property, or the settlement date for some other assets. The U.S. generally recognizes gain at the settlement/closing date. For real estate transactions, the contract and settlement dates may be in different tax years, creating potential year-of-recognition mismatches. Currency exchange rates on different dates can also affect the USD gain calculation.

Australian real estate — additional complexity

🇺🇸 Americans who own Australian real estate face the same issues as any Australian capital gains taxpayer, plus the U.S. complications:

• The U.S. Section 121 primary residence exclusion (up to $250,000/$500,000 gain) may apply if the Australian property was your principal residence for 2 of the prior 5 years
• Currency translation: the Australian dollar cost basis and sale proceeds must be converted to USD using the exchange rates at each relevant date
• Foreign mortgage interest: if you have an Australian mortgage, the interest may be deductible on Schedule A (foreign real estate mortgage interest qualifies), but deduction is limited to investment-use properties if FTC is claimed

Franking credits on Australian dividends — partial FTC value

Australia's dividend imputation system is unique in the world. When an Australian company pays a franked dividend — a dividend paid out of profits on which the company has already paid corporate income tax — it attaches "franking credits" (also called imputation credits) representing the corporate tax already paid. Australian resident shareholders can use these credits to offset their personal income tax, potentially receiving a refund if the franking credits exceed their tax liability.

For U.S. citizens receiving Australian franked dividends, the franking credit system creates a nuanced FTC situation:

How Australian dividends work for U.S. persons

When you receive a fully franked dividend of AUD $700, the "grossed-up" dividend (including franking credits) is AUD $1,000 (because the company paid 30% corporate tax, leaving $700 as the cash dividend). Australia includes the grossed-up amount ($1,000) as your assessable income and gives you a $300 franking credit against your Australian tax.

For the U.S. return:

• The U.S. generally treats the cash dividend received (AUD $700) as your dividend income — the U.S. does not recognize the grossed-up treatment
• The Australian income tax attributable to the grossed-up dividend after applying the franking credit is the foreign tax that can be creditable against U.S. tax on that dividend
• Because Australia offsets the $300 corporate tax through the franking credit, the individual-level Australian tax on the dividend may be relatively low (if the individual's marginal rate is, say, 37%, they owe $370 Australian income tax but get a $300 franking credit refund, so the net Australian income tax is $70 on the grossed-up $1,000)
• This relatively small FTC ($70 in this example) is applied against U.S. tax on $700 of dividend income (since the U.S. does not gross up)

The practical result is that franking credits on Australian dividends do provide some FTC benefit — but because Australia effectively gives back much of the corporate tax to Australian shareholders through the franking system, the net Australian individual-level tax is often lower than it might appear. The FTC available on Australian franked dividends will frequently not fully cover the U.S. tax on the same dividends, particularly if those dividends are in the passive income basket (which has separate limitation calculations from general income).

Practical filing steps for 🇺🇸 Americans in Australia

1. Choose FTC vs FEIE. For virtually all salaried 🇺🇸 Americans in Australia, FTC is the correct choice. Confirm this before your first Australian return. Once FEIE is used, switching away requires IRS permission, and FEIE cannot be re-elected for 5 years after revocation.
2. Address superannuation compliance. This is the most urgent step for 🇺🇸 Americans who have been working in Australia without proper super reporting. Determine whether you need to file Forms 3520 and 3520-A for current and prior years. If you have not been filing these forms, assess whether the Streamlined Offshore Procedures are appropriate for coming into compliance. Do not ignore this — the longer you wait, the larger the potential back-filing burden.
3. Gather Australian income documentation. Collect your PAYG payment summary (Australia's version of a W-2, showing gross income and tax withheld), ATO income tax assessment, and superannuation fund statements. The Australian financial year ends June 30 — convert the amounts to USD for your U.S. calendar-year return.
4. Complete Form 1116 (FTC). Separate your Australian income into the correct FTC baskets — general limitation income for wages and business income; passive income for dividends, interest, and capital gains. The basket separation matters for computing the FTC limitation.
5. Handle the Australian tax year mismatch. Decide between the accrual and paid methods for FTC timing. Document and apply consistently. Many CPAs use the accrual method for Australian expats — confirming with your CPA which method you are using is important.
6. File the FBAR by April 15 (automatic extension to October 15). Report all Australian bank accounts, brokerage accounts, and super fund account balances that contributed to the $10,000 combined threshold being exceeded.
7. Consider Form 8938 (FATCA) if your total foreign assets — Australian bank accounts plus super fund balance plus any Australian investment accounts — exceed the thresholds for 🇺🇸 Americans abroad ($200,000 year-end or $300,000 at any point for single filers; $400,000 year-end or $600,000 at any point for married filing jointly).
8. Report PFIC holdings from super fund. If your super fund holds interests in PFICs (which many Australian super funds do through their investment in Australian or international managed funds), Form 8621 may be required for each PFIC holding. This is complex — the PFIC rules require tracking annual income, distributions, and elections. Super fund statements rarely provide the information needed for Form 8621 in a form suitable for U.S. tax purposes.
9. Capital gains reconciliation. For any Australian assets sold during the year, calculate the gain in both AUD and USD terms, determine whether the Australian 50% CGT discount creates a FTC shortfall, and plan accordingly.
10. File Form 1040 by June 15 (automatic two-month extension for 🇺🇸 Americans abroad). Extend to October 15 with Form 4868 if needed. The written December 15 extension is available for overseas filers who need additional time beyond October 15.