Tax Planning

Planning for Pillar Two: How Multinational Entities Can Navigate Australia's Global Minimum Tax Reforms

With Australia’s adoption of OECD’s Pillar Two rules, multinational enterprises face new global and domestic minimum tax obligations from 1 January 2024. Plan now to align your structure and reporting to avoid surprises.

By NomadicTax Research Team • 5-8 min read • April 1, 2026

## Understanding Pillar Two in Australia Australia has implemented the OECD/G20 Global Anti-Base Erosion Model Rules (often called 'Pillar Two') in its **Taxation (Multinational—Global and Domestic Minimum Tax) Act 2024**, along with related legislation and subordinate rules. ([ato.gov.au](https://www.ato.gov.au/businesses-and-organisations/international-tax-for-business/in-detail/multinationals/global-and-domestic-minimum-tax?utm_source=openai)) Key elements include: - **Income Inclusion Rule (IIR)**: Top-up tax applied to global parent entities in Australia if effective tax rates elsewhere are below 15% for fiscal years starting on or after 1 January 2024. ([ato.gov.au](https://www.ato.gov.au/about-ato/new-legislation/in-detail/international/implementation-of-a-global-minimum-tax-and-a-domestic-minimum-tax?utm_source=openai)) - **Undertaxed Profits Rule (UTPR)**: Functions as a backstop for entities not caught by IIR, effective from fiscal years starting on or after 1 January 2025. ([ato.gov.au](https://www.ato.gov.au/businesses-and-organisations/international-tax-for-business/in-detail/multinationals/global-and-domestic-minimum-tax?utm_source=openai)) - **Domestic Minimum Tax** (DMT): Ensures low taxed profits in Australia are brought into tax first before IIR or UTPR apply. Also effective from 1 January 2024. ([ato.gov.au](https://www.ato.gov.au/about-ato/new-legislation/in-detail/international/implementation-of-a-global-minimum-tax-and-a-domestic-minimum-tax?utm_source=openai)) ## Practical Impacts & Compliance Considerations Entities that are part of multinational groups with **global revenue ≥ EUR 750 million** will be in scope. The new rules affect group structure, accounting, reporting, and could influence where and how operations are organised. Examples: - A group with foreign subsidiaries paying only 5% tax in a low-tax jurisdiction—Australia may apply **IIR** to collect top-up tax so the group’s average tax rate meets 15%. ([ato.gov.au](https://www.ato.gov.au/businesses-and-organisations/international-tax-for-business/in-detail/multinationals/global-and-domestic-minimum-tax?utm_source=openai)) - If profits are generated by an Australian entity but already taxed locally at below threshold, **Domestic Minimum Tax** may require additional tax to bring them up to 15% before foreign jurisdictions exercise claims. ([ato.gov.au](https://www.ato.gov.au/businesses-and-organisations/international-tax-for-business/in-detail/multinationals/global-and-domestic-minimum-tax?utm_source=openai)) ## Actionable Steps for Tax Planning 1. **Review your group’s current structure and effective tax rates** in each jurisdiction—determine exposure under IIR, UTPR or DMT. 2. **Keep robust accounting and data systems ready** to track foreign taxes paid, profits by jurisdiction, and effective tax rates. Australia has stated lodgment deadlines and transition rules rolling out, including **first lodgments due 30 June 2026**. ([ato.gov.au](https://www.ato.gov.au/media-centre/key-developments-in-tax-administration-in-australia?utm_source=openai)) 3. **Take advantage of transitional relief**, where possible. The ATO has indicated a “soft-landing” approach during the transitional period for filing and penalties, subject to reasonable efforts. ([au.andersen.com](https://au.andersen.com/march-2026-monthly-tax-update/?utm_source=openai)) 4. **Seek early guidance**. The ATO is issuing draft rulings and guidance (TR 2006/11 updates, PCGs) for public consultation. Stay aware of those to align your strategy. ([au.andersen.com](https://au.andersen.com/march-2026-monthly-tax-update/?utm_source=openai)) ## Example Scenario A US-headquartered MNE has an Australian subsidiary and a subsidiary in Country X with a 10% tax rate. Under IIR, Australia's parent could pay a top-up for its share of profits relative to Country X so that the rate reaches 15%. Suppose Country X profits attributable to the group are AUD 10 million; then Australia might apply an additional AUD 500,000 in tax. If profits are generated domestically in Australia and taxed at 12%, DMT may require the entity to pay top-up so that it meets 15%. ## Final Thoughts Australia’s Pillar Two rules reshape international tax planning, especially for multinationals. Early preparation, system readiness, and active engagement with the evolving guidance from the ATO will help avoid compliance costs, penalties, or surprises in liabilities.