Australia taxes residents on worldwide income and non-residents on Australia-source income only. Australia operates a self-assessment system, adopted in 1986-87 per IMF research: taxpayers (or their registered tax agent) calculate and lodge their own return, and the Australian Taxation Office conducts risk-based reviews and audits after assessment rather than calculating the liability itself in the first instance.
The Australian tax year runs 1 July to 30 June (a company may apply to adopt a substitute year, such as calendar year, subject to approval). The standard individual filing deadline for self-lodged returns is 31 October following the end of the financial year; taxpayers who engage a registered tax agent before that date can generally access an extended deadline, potentially as late as 15 May of the following year.
Australia's headline corporate income tax (CIT) rate is 30% (25% for small-medium business entities).
The headline personal income tax (PIT) rate is 45%.
The standard VAT/GST (or equivalent consumption tax) rate is 10% (GST).
Australia applies four independent tests, any one of which is sufficient to establish tax residency: the Resides Test (a facts-and-circumstances assessment of whether Australia is genuinely where someone lives - family location, employment, property, community ties), the Domicile Test, the 183-Day Test (present in Australia for 183+ days in a financial year - 1 July to 30 June - unless the person's usual place of abode is demonstrably outside Australia and they have no intention to reside), and the Commonwealth Superannuation Test (certain government employees posted abroad). Legislated reform toward a simpler "bright line" primary test (183 days, full stop) has been proposed following a 2019 Board of Taxation review but was not yet in force as of the most recent verification - confirm current status before relying on this. Residents are taxed on worldwide income; non-residents only on Australian-source income.
A non-Australian entity has an Australian permanent establishment through a fixed place of business or a dependent agent habitually concluding contracts in Australia on the entity's behalf, following the OECD Model Treaty definition as applied under Australian domestic law and any applicable tax treaty.
Australia's CFC regime requires resident shareholders with sufficient interests in a foreign company to include their share of the CFC's "attributable income" in their own assessable income, regardless of distribution. Whether income is attributable depends on whether the CFC is resident in a "listed" or "unlisted" country and whether it passes an active income test; passive and tainted income (including certain concessionally taxed dividends, interest, and royalties classified as "eligible designated concession income") is more likely to be attributed. Notably, Australia's domestic thin capitalization and debt-deduction-creation rules do not apply to CFCs in the same manner as to resident companies - CFC attributable income is calculated with its own specific modifications.
Australia replaced its former asset-based thin capitalization test with a fixed ratio EBITDA-style regime for income years starting on or after July 1, 2023 (implementing OECD BEPS Action 4). General class investors and non-ADI financial entities now choose among three tests: the Default Fixed Ratio Test, a Group Ratio Test, or a Third-Party Debt Test (which permits related-party debt deductions only where strict conditions are met, including limited recourse to specified assets). The former arm's-length debt test has been removed entirely. Separate "debt deduction creation rules," targeting related-party arrangements that artificially generate debt deductions, apply to income years starting on or after July 1, 2024.
Australia does not use an elective check-the-box classification system; entity classification generally follows the entity's actual legal characteristics, though Australia's own trust structures are frequently the subject of foreign hybrid-classification questions from counterparty jurisdictions. Australia has implemented OECD BEPS Action 2-aligned anti-hybrid rules denying deductions for payments producing a hybrid mismatch outcome.
No foreign bank account or foreign financial asset reporting regime exists in Australia requiring residents to separately disclose foreign accounts; foreign income is reported through the standard annual tax return.
Australia provides a participation exemption for foreign-source dividends: dividends paid by a foreign company to an Australian corporate shareholder holding at least 10% of the voting power are generally non-assessable non-exempt income (effectively exempt from Australian tax), reflecting Australia's broader policy of exempting active foreign income of resident companies from further domestic tax.
Australia has a real foreign tax credit regime (the Foreign Income Tax Offset, FITO) available to both individuals and companies, crediting foreign income tax paid against the Australian tax payable on the same income, subject to an overall cap.
Australia maintains tax treaties with 46 jurisdictions. Several new or updated treaties have been signed but were not yet in force as of the most recent update, including with Portugal, Slovenia, Ukraine, and Croatia; Australia is also negotiating its first treaty with Brazil and updating existing treaties with New Zealand, South Korea, Sweden, and Canada. The current authoritative list is maintained by the Australian Treasury.