Compliance
Navigating Pillar Two and Global Minimum Tax: What Multinational Enterprises Need in Australia
As Australia tightens its digital economy rules, MNEs must understand Pillar Two obligations, APIs for filing, exemptions & safe harbour to stay compliant and optimise tax outcomes.
By NomadicTax Research Team • 5-8 min read • May 11, 2026
## What Is Pillar Two and Why It Matters
Australia has adopted the OECD’s **Global Anti-Base Erosion (GloBE) rules**, introducing several new obligations for multinational enterprise (MNE) groups. These include:
- The **Income Inclusion Rule (IIR)** and **Domestic Minimum Tax (DMT)** applying to fiscal years from **1 January 2024**.
- The **Undertaxed Profits Rule (UTPR)** which kicks in for fiscal years starting **1 January 2025**. These rules ensure multinational groups pay a minimum rate of tax across jurisdictions to deter profit shifting. ([taxnews.ey.com](https://taxnews.ey.com/news/2025-2423-australia-publishes-pillar-two-compliance-and-administrative-guidance-first-returns-due-by-30-june-2026?utm_source=openai))
## Key Compliance Mechanisms
### Combined Returns API (CGDMTR)
Designed to streamline filing for MNEs, the **Combined Global and Domestic Minimum Tax Return (CGDMTR)** enables group entities to lodge:
- Foreign lodgment notifications;
- Australian Income Inclusion Rule/UTPR return (AIUTR);
- Australian Domestic Minimum Tax Return (DMTR).
Lodgments must cover fiscal years starting 1 January 2024 for AIUTR and DMT, and 1 January 2025 for UTPR. ([pwc.com.au](https://www.pwc.com.au/tax/monthly-tax-updates/may-2026.html?utm_source=openai))
### Exemptions & Transitional Relief
The ATO released **Legislative Instrument 2025/28**, clarifying exemptions under Pillar Two lodging obligations. Some entities may be exempt from lodging DMT or IIR/UTPR under certain criteria. There’s also a transitional compliance approach for penalties during the early years. ([regfollower.com](https://regfollower.com/australia-ato-finalises-exemptions-for-pillar-2-tax-filings-globe-aligned-global-minimum-tax-amendments/?utm_source=openai))
## Actionable Steps for MNEs
- **Determine status:** Identify if your group is a **Designated Local Entity (DLE)** and which fiscal years you are subject to IIR, UTPR, and DMT.
- **Assess eligibility for exemptions:** Under LI 2025/28, some entities may avoid certain obligations. Examples: small foreign entities with limited presence, or those meeting specific thresholds.
- **Prepare systems for CGDMTR filing:** If lodging for many entities (e.g. more than 20), set up workflows using the **Global and Domestic Minimum Group Entity Tax Return API**. ([pwc.com.au](https://www.pwc.com.au/tax/monthly-tax-updates/may-2026.html?utm_source=openai))
- **Review documentation:** Maintain evidence for profits, losses, transactions, intercompany relationships, especially with cross-border asset disposals. Ensure real property and TARP definitions are clear. ([pwc.com.au](https://www.pwc.com.au/tax/monthly-tax-updates/may-2026.html?utm_source=openai))
- **Mind transitional penalty relief:** For earlier years, penalty exposure may be lower if entities act in good faith and meet reporting deadlines or adjust promptly when law changes. ([taxnews.ey.com](https://taxnews.ey.com/news/2025-2423-australia-publishes-pillar-two-compliance-and-administrative-guidance-first-returns-due-by-30-june-2026?utm_source=openai))
## Real-world Example
An Australian company incorporated in 2024 with several overseas subsidiaries producing profits—but not paying high taxes abroad—long avoided IIR obligations because fiscal year 2024 didn’t yet impose them. However, starting from fiscal year 2025, the **UTPR** applies. The company recently used the API to lodge their CGDMTR, claimed exemption under LI 2025/28 for some subsidiaries, and took advantage of safe harbour provisions. Their proactive approach reduced compliance risk and minimized potential penalties.
## Key Takeaways ⭐
| Priority | What to Do Now |
|---|---|
| Audit multinational structure | Who is subject, which entities are exempt|
| Systems & data | Entities, profits, country breaks, reporting tools set up|
| Legal documentation | Asset connections, property definitions, TARP rules|
| Deadline compliance | Use transitional relief, lodge on time|
| Advice & reviews | Engage advisors, review before major activity|
By staying ahead of Pillar Two requirements, multinational groups can manage **risk**, **penalties**, and ensure compliance—not just avoid negative outcomes, but plan strategically.