Australia

Australia has a federal corporate income tax (no state/provincial corporate income tax):

• Rates. 30% for most companies; 25% for “base rate entities” (broadly, aggregated turnover less than AUD 50 million and no more than 80% of assessable income is passive/base rate entity passive income).
• Notes. Fully imputed dividends carry franking credits reflecting tax paid (franking rate generally aligns to the company tax rate); special regimes may apply for certain entities/industries (e.g. petroleum resource rent tax for petroleum projects).

Trusts and partnerships are generally flow-through vehicles. They typically do not pay income tax at the entity level (except in limited cases, such as public trading trusts and certain limited partnerships, both taxed as companies), and instead the net income is allocated and taxed in the hands of beneficiaries/partners at their respective rates. In practice, trustees may be assessed where income is not effectively distributed at year end (or for certain minor/non-resident beneficiaries), and partners are assessed on their share of partnership net income regardless of cash distributions. Integrity rules (including trust loss rules and streaming/characterisation rules) can materially affect outcomes.

Yes. Australia has implemented the OECD/G20 Pillar Two Global Anti-Base Erosion (GloBE) Rules via a global and domestic minimum tax designed to ensure in-scope multinational groups pay an effective minimum tax rate of 15% in each jurisdiction.

How it applies (high level)

An Income Inclusion Rule (IIR) and an Australian domestic minimum tax apply for fiscal years starting on/after 1 January 2024; an Undertaxed Profits Rule (UTPR) applies for fiscal years starting on/after 1 January 2025. The rules generally apply to groups with consolidated revenue of at least EUR 750 million (subject to specific scope/exclusions under the Pillar Two framework).

Practical points

In-scope groups must calculate a jurisdictional effective tax rate (ETR). This starts with determining the net income of each constituent entity in the jurisdiction (based on financial accounting data), then identifying the covered taxes attributable to that net income, applying any available reporting simplifications and GloBE-specific adjustments under the Australian Minimum Tax Rules. The ETR is broadly total covered taxes ÷ total net income. If a jurisdiction’s ETR is below 15%, a top-up tax is calculated (generally the 15% minimum rate less the jurisdictional ETR, applied to the jurisdiction’s relevant income, subject to the detailed rule set). The jurisdiction’s top-up tax is then allocated across the relevant entities. Where Australia’s ETR is below 15%, Australian constituent entities are allocated and liable for a domestic top-up tax. Where a foreign jurisdiction’s ETR is below 15%, Australian entities may instead bear an IIR or UTPR top-up tax amount (depending on group structure and the ordering rules). In some cases, “stateless” entities can also give rise to allocated domestic top-up tax amounts.

Residents

Subject to Australia’s network of Double Tax Agreements (DTA), Australian resident companies are generally taxed on worldwide income (including foreign-source income), with relief commonly via foreign income tax offsets and (in some cases) exemption for certain foreign dividends/branch profits under Australia’s participation-style rules.

Capital gains

Capital gains made by companies are generally included in taxable income and taxed at the company’s applicable rate (there is no separate CGT rate for companies). Capital gains are typically realised on CGT events, such as disposals of shares, businesses and other assets. Capital losses can only be used to offset capital gains (not ordinary income) and any unused capital losses are generally carried forward to future years (subject to continuity/ownership and related integrity rules). Companies do not generally access the CGT discount that can apply to individuals and certain trusts. A participation-style exemption from CGT on sales of foreign subsidiaries, and other non-portfolio offshore holdings, may be available.

Non-residents

Non-resident companies are generally taxed only on Australian-sourced income, gains on “taxable Australian property” (e.g. Australian real property and certain indirect real property interests, although as noted below the definition of taxable Australian property has been expanded recently) and income subject to Australian withholding tax. Business profits are typically taxable only where the non-resident carries on business through an Australian permanent establishment (subject to an applicable tax treaty).

A foreign company can be deemed to be Australian tax resident if its central management and control is in Australia, even if it does not otherwise carry on business in Australia. The tie-breaker provisions in Australia’s DTAs will apply if a company is tax resident in more than one jurisdiction.

Foreign-sourced income

Subject to DTAs, Australian resident companies are taxed on receipt of foreign-sourced income as follows:

• Foreign dividends. Generally assessable, but a participation-style exemption can apply for certain dividends from foreign companies where the Australian corporate recipient has a significant ownership interest (commonly where it holds at least 10% at the time the dividend is paid), meaning the dividend may be treated as non-taxable in Australia.
• Foreign branch profits. Active business profits derived through a foreign permanent establishment may be exempt from Australian tax (so they are not taxed again in Australia), subject to integrity limitations and anti-hybrid/anti-avoidance rules.
• Foreign interest, royalties and rent. Typically assessable when derived/received (subject to ordinary deduction rules). Relief from double tax is commonly provided through a foreign income tax offset (FITO) for foreign tax paid on amounts included in Australian income (subject to offset limits and record-keeping).
• Foreign capital gains. Gains on disposal of foreign assets are generally assessable as part of taxable income (no separate company CGT rate). Foreign tax on capital gains may also give rise to FITO where the gain is included in Australian assessable income. A participation-style exemption from CGT on sales of foreign subsidiaries, and other non-portfolio offshore holdings, may be available.
• Foreign exchange gains/losses. Realised foreign exchange gains are generally assessable and losses deductible, with the detailed treatment depending on the nature of the underlying transaction (and, for some taxpayers, financial arrangement rules).
• Attributed income (CFC rules). Australian resident companies with sufficient interests in a controlled foreign company (CFC) may be taxed on their share of certain CFC income on an accruals basis (even without distributions), with the “active income test” and listed/unlisted country rules affecting the scope of attribution.

Yes. Key indirect taxes include:

• Goods and services tax (GST). 10% broad-based consumption tax on most supplies connected with Australia and taxable importations (with GST-free and input-taxed categories).
• Customs duty. On certain imports and excise (e.g. fuel, alcohol, tobacco).
• Other federal indirect taxes. Luxury car tax (LCT), wine equalisation tax (WET), passenger movement charge and certain resource taxes/royalties depending on sector.
• State/territory taxes. Stamp/transfer duty, payroll tax and land tax (rates and bases vary by jurisdiction). These can be complex and vary from state to state.

Compliance (high level)

GST is generally reported in Business Activity Statements (BAS) (monthly or quarterly). Non-residents making supplies connected with Australia may have registration and collection obligations depending on the supply type. For certain real property transactions, purchasers may have GST withholding obligations at settlement (separate to the foreign resident CGT withholding regime).

Withholding tax primarily applies to certain payments to non-residents. Common headline rates (subject to DTA reductions and specific exemptions) include:

• Dividends. No withholding on fully franked dividends; withholding generally applies to unfranked dividends at 30% unless reduced by a DTA (often 0–15% depending on conditions). “Conduit foreign income” can be exempt.
• Interest. Generally 10% interest withholding tax (common exemptions include certain publicly offered debentures and some offshore banking/related rules) but can be reduced under a DTA.
• Royalties. Generally 30% unless reduced by a DTA (often to 5–15%).
• Managed Investment Trusts (MITs). “Fund payments” to foreign residents are generally subject to final withholding (commonly 15% for information-exchange jurisdictions; 30% otherwise), with separate withholding for certain dividend/interest/royalty components.
• Foreign resident capital gains withholding. Purchasers may need to withhold (commonly 15%) from certain acquisitions of Australian taxable property/indirect interests unless an exemption applies. The scope of taxable Australian property has been expanded, and includes not just direct and indirect interests in real property, but also fixtures to land, assets with a close economic connection to land (mining rights, infrastructure), and assets used in an Australian permanent establishment.

Common exemptions/changes to note

Interest withholding tax can be reduced to nil in common capital markets/syndicated lending scenarios under the public offer exemptions, provided strict conditions are met (vendors typically avoid withholding by providing a clearance certificate; foreign residents can seek a variation where the asset is not taxable Australian property).

Yes. Australia’s main income tax, GAAR, is found in Part IVA of the Income Tax Assessment Act 1936. Broadly, the Australian Taxation Office (ATO) can cancel a “tax benefit” (e.g. a deduction, loss, or exclusion of income) where, having regard to statutory factors, it is objectively concluded that a person entered into or carried out a “scheme” for the sole or dominant purpose of obtaining that tax benefit.

In practice

“Scheme” is defined broadly; the analysis involves identifying a reasonable alternative postulate (what would have happened absent the scheme) and comparing tax outcomes. If Part IVA applies, the Commissioner can reconstruct the tax outcome (e.g. include income, deny deductions) and impose interest and (often significant) penalties. Similar anti-avoidance rules also exist in specific regimes (e.g. GST, Fringe Benefits Tax and anti-streaming rules for imputation benefits).

Key “purpose” factors include how the scheme was carried out, its form versus substance, timing, the tax result, and changes in financial position of the taxpayer/connected parties.

Practical focus is often on contemporaneous documents (board papers, modelling, emails), commercial drivers, and whether the same commercial outcome could reasonably have been achieved with materially less tax benefit.

Common drivers of tax disputes include:

• Transfer pricing and cross-border related party financing (thin capitalisation, interest limitation, debt/equity characterisation).
• Permanent establishment issues and source of income; corporate residency/central management and control.
• GST characterisation (taxable versus GST-free/input taxed), grouping, and property transactions (including GST withholding).
• Part IVA (GAAR) and other integrity rules (hybrids, anti-avoidance provisions, anti-streaming).
• Withholding tax issues (dividends/interest/royalties and MIT withholding) and treaty entitlement/beneficial ownership.
• R&D tax incentive eligibility and substantiation.
• Payroll tax/contractor provisions at state level.
• Valuations (market value substitutions, share/asset values), capital versus revenue, and loss/utilisation issues.
• Penalties and interest (culpability characterisation, remission).

Where disputes start (practical)

Controversies commonly arise from risk reviews and audits by the ATO triggered by data-matching, disclosures in financial statements/tax returns, large offsets and refunds (e.g. R&D), cross-border payments, and significant transactions (M&A, restructures, property). Substantiation and information-gathering issues (scope, privilege, timeliness, and quality of records) often become disputed points early, even before the substantive technical arguments crystallise.

Penalties and interest (practical)

Penalties and interest can materially increase the cost of a dispute, and often drive settlement timing. Administrative penalties are commonly imposed where the ATO considers a taxpayer (or its adviser) has taken a position that results in a tax shortfall, with the penalty rate turning largely on the assessed level of culpability and the quality of contemporaneous documentation and advice.

• Shortfall penalties (common benchmarks). 25% where reasonable care was not taken; 50% for recklessness; and 75% for intentional disregard of the law (with potential uplifts/reductions depending on the circumstances).
• Mitigating factors. Penalties may be reduced where a voluntary disclosure is made before audit action, where the taxpayer has reasonably relied on ATO guidance, or where safe-harbour rules apply (for example, where a registered agent made the statement based on complete and correct information provided by the taxpayer).

Interest

The ATO generally applies interest automatically on unpaid tax and on tax shortfalls identified on amendment. Broadly, a shortfall interest charge may apply for the period from the original due date until an amended assessment is issued, and a higher general interest charge may then accrue on any unpaid amounts after the due date for payment, compounding daily at published quarterly rates.

Remission and strategy

The Commissioner has discretion to remit interest and certain penalties where it is fair and reasonable (for example, where delays are outside the taxpayer’s control or there are ATO administrative delays). From 1 July 2025, interest charges incurred are no longer deductible, increasing the after-tax cost of carrying ATO debt and making early resolution, payment arrangements and targeted remission requests more important in practice.

Key frameworks include:

• Most ATO decisions are subject to review under the provisions of Part IVC of the Taxation Administration Act 1953 (TAA). The TAA established a process for taxpayers to “object” against an ATO assessment or decision, and if dissatisfied with the decision on objection, to challenge in the Federal Court or the Administrative Review Tribunal (ART).
• Typical pathway:
  • ATO review/audit;
  • amended assessment/decision;
  • taxpayer objection;
  • if disallowed/partly allowed, merits review in the ART or appeal to the Federal Court (depending on the decision type); and
  • potential further appeals to higher courts on questions of law.

Objections and review mechanics (high level)

An objection must be lodged within the applicable statutory time limit (commonly 60 days, but can be longer depending on the decision type). The taxpayer generally bears the burden of proof and must show the assessment/decision is excessive or otherwise wrong, supported by evidence. The ATO also offers independent review pathways for some audit positions (small business and large market independent review), which can be used to test technical positions before formal objection/litigation.

Yes. Alternative and early-resolution options commonly used include:

• Early engagement. Pre-lodgement compliance reviews, practical-compliance discussions, and private binding rulings/advance pricing arrangements (transfer pricing) are used to reduce future disputes.
• ATO dispute resolution. In-house facilitation, case conferencing, and negotiated settlements (including during audit, objection or litigation) are used where appropriate.
• Tribunal/court ADR. The ART and Federal Court frequently use mediations, conciliation and directions hearings to narrow issues and encourage settlement.
• Test case litigation program. Limited funding may be available where a matter raises issues of public importance and clarifying precedent is sought.
• Tax Ombudsman. Available for complaints about ATO administration (separate from merits review of assessments/decisions).

In-house facilitation (ATO)

Taxpayers can request an accredited, impartial ATO facilitator to help guide discussions with the case team to identify issues, explore options and attempt early resolution. It can be requested at any stage, is voluntary, and is typically used for less complex disputes or to narrow issues before an objection, ART hearing or court timetable.