Compliance
Compliance in Transition: Global Minimum Tax (Pillar Two) in Australia for MNEs
Australia’s Pillar Two rules introduce new compliance obligations for large multinationals; understanding transitional relief is key to avoiding penalties.
By NomadicTax Research Team • 5-8 min read • March 23, 2026
## What is the Pillar Two/GloBE Regime in Australia?
Australia has enacted legislation implementing key aspects of the OECD/G20 Global Anti-Base Erosion (GloBE) rules, including a 15% global minimum tax for large multinational enterprise (MNE) groups. It applies under two main rules:
- **Income Inclusion Rule** (for fiscal years starting on or after 1 January 2024).
- **Undertaxed Profits Rule** (as of 1 January 2025). ([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))
A **domestic minimum tax** also applies where Australia’s effective tax rate falls below 15%. ([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))
## Compliance Obligations and Transition Period
### Who is in scope?
MNE groups with annual global revenue of EUR 750 million or more, including foreign-and Australian-headquartered entities. Estimated around **6,000 groups** are affected, with ~135 headquartered in Australia. ([ato.gov.au](https://www.ato.gov.au/media-centre/key-developments-in-tax-administration-in-australia?utm_source=openai))
### What must these entities do?
- Lodge **GIRs** (GloBE Information Returns), deliver required financial disclosure, and report top-up tax liabilities.
- Track effective tax rates in jurisdictions, evaluate if undertaxed profits exist.
- Adjust financial systems for reporting and exchange.
### Penalties and Transitional Relief
Australia is offering a **soft landing** during the transition period. Reasonable measures to comply during fiscal years up to 31 December 2026 (but not ending after 30 June 2028) can help avoid penalties. ([ato.gov.au](https://www.ato.gov.au/media-centre/key-developments-in-tax-administration-in-australia?utm_source=openai))
## Actionable Steps for Affected MNEs
- Begin preparing internal systems and reporting workflows now.
- Collect all financials needed for effective tax rate calculations, including foreign tax credits, group consolidation items.
- Engage tax advisors with experience in OECD Model Rules to ensure compliance design aligns with the law.
- Use transitional relief—document your steps so that “reasonable measures” can be demonstrated.
## Example Case: Manufacturing Firm with Global Subsidiaries
An Australian manufacturer with foreign subsidiaries in low-tax jurisdictions needs to compute the jurisdictional ETRs. If a country’s ETR is below 15%, top-up tax might be owed. In the first year, if they set up proper systems but miss minor data, they may avoid penalty under the transition if documentation is solid.
## Why This Matters Globally
Even for non-Australian head-quartered MNEs with Australian operations, these rules could trigger **double taxation** or foreign tax credit strategies. Understanding Pillar Two in Australia helps with global consistency, treaty interactions, and avoiding surprises.
By taking early action, MNEs can build compliance, limit risk, and use the transition period to smooth into full reporting and tax liability exposure under Pillar Two.