Compliance
Staying Compliant with the ATO’s Pillar Two & Global Minimum Tax Rules
Multinational enterprise groups operating in Australia must prepare for new global and domestic minimum tax rules, including reporting, lodgment, and compliance obligations ahead of June 2026 deadlines.
By NomadicTax Research Team • 5-8 min read • March 20, 2026
## Overview of Pillar Two & Global/Domestic Minimum Tax
Australia has legislated the OECD’s Global Anti-Base Erosion (GloBE) Rules, including a **15% global minimum tax rate**. The rules include an **Income Inclusion Rule (IIR)** (effective from 1 January 2024), an **Undertaxed Profits Rule (UTPR)** (from 1 January 2025), and now a **Domestic Minimum Tax (DMT)**.([ato.gov.au](https://www.ato.gov.au/businesses-and-organisations/international-tax-for-business/private-wealth-international-program/new-international-tax-measures-affecting-private-groups?utm_source=openai))
## Compliance & Lodgment Obligations
Obligations include:
- Filing a combined Domestic form and GloBE Information Return by **30 June 2026** for in-scope multinational enterprise (MNE) groups.([ato.gov.au](https://www.ato.gov.au/media-centre/key-developments-in-tax-administration-in-australia?utm_source=openai))
- Reporting on undertaxed profits and foreign related entities under Australian IIR/UTPR and domestic rules.
- Disclosing structured transactions and satisfy new reporting thresholds.
Transitional arrangements and a “soft-landing” approach are expected for penalties if taxpayers take **reasonable steps** to comply.([ato.gov.au](https://www.ato.gov.au/media-centre/key-developments-in-tax-administration-in-australia?utm_source=openai))
## Key Risks & How to Mitigate
**Risk of incorrect data capture**:
- Many MNEs may not have internal reporting systems aligned yet. Start mapping internal finance data to OECD schema now.
**Tax treaty complexities and double counting**:
- Examine treaties with countries where associated offshore entities reside to assess treaty impacts on minimum tax.
**Penalties and governance**:
- Given new RTP (Reportable Tax Position) disclosures, structures or restructures in response to DDCR need careful attention. Tax-governance practices should be tightened.([ato.gov.au](https://www.ato.gov.au/media-centre/key-developments-in-tax-administration-in-australia?utm_source=openai))
## Practical Steps to Prepare
- Conduct a readiness assessment: is data being tracked correctly? Do finance and tax teams understand definitions?
- Engage with external advisers to model potential outcomes under IIR, UTPR & DMT.
- Stay updated on ATO guidance, including draft rulings or PCGs (Practical Compliance Guidelines).
- If in-scope, determine whether use of digital service provider (DSP) portals or APIs for lodgment of GIR and domestic forms will work.([softwaredevelopers.ato.gov.au](https://softwaredevelopers.ato.gov.au/Pillar2_20250305?utm_source=openai))
## Case Example
A foreign-headquartered group with operations in Australia has set up data centers in Australia. They now need to assess:
- whether payments for intangible assets or royalties are being mischaracterised;
- whether their Australian entities are in scope under these minimum tax rules.
They might face **loss of debt deductions** under thin capitalisation or DDCR if they restructuring was done without considering new rules.
## Key Dates to Watch
| Date | What Happens/Requires Action |
|---|---|
| 30 June 2026 | First lodgment deadline for many GloBE/DMT obligations. |
| 1 July 2024 / 1 Jan 2024–25 | Start points for different minimum tax components. |
| Present-2026 | Transition period; penalty “soft landing” if compliance is reasonable. |
Ensuring compliance under these new measures protects companies from adverse adjustments, reputational risk, and financial penalties. Early preparation equals smoother implementation.