Tax Planning
How Australia’s Pillar Two’s First Filings Will Change Tax Planning for Multinationals
Australia’s new global and domestic minimum tax regime (Pillar Two) brings fresh filing obligations, transition relief, and strategic shifts for multinational entities — here’s what business leaders must know now.
By NomadicTax Research Team • 5-8 min read • April 16, 2026
## What is Pillar Two and When Does It Apply?
Australia’s adoption of the OECD’s Pillar Two rules introduces two standards: the **Global Anti-Base Erosion (GloBE) rules** and a Domestic Minimum Tax (DMT). These take effect for most multinational enterprise (MNE) groups from **1 January 2024** (for Income Inclusion Rule & Domestic Minimum Tax) and **1 January 2025** for the Undertaxed Profits Rule.([ey.com](https://www.ey.com/content/dam/ey-unified-site/ey-com/en-au/technical/tax/documents/ey-tax-alert-australian-taxation-office-announces-pillar-two-lodgment-deferral-and-releases-new-guidance.pdf?utm_source=openai))
## Key Filing Obligations and Reliefs
- MNEs in scope will need to lodge **GloBE Information Returns (GIR)**, as well as returns for the Australian IIR/UTPR and Domestic Minimum Tax Return.([ey.com](https://www.ey.com/content/dam/ey-unified-site/ey-com/en-au/technical/tax/documents/ey-tax-alert-australian-taxation-office-announces-pillar-two-lodgment-deferral-and-releases-new-guidance.pdf?utm_source=openai))
- There’s a **30-day lodgment deferral** for the Australian DMTR and IIR/UTPR returns to ease the transition.([ey.com](https://www.ey.com/content/dam/ey-unified-site/ey-com/en-au/technical/tax/documents/ey-tax-alert-australian-taxation-office-announces-pillar-two-lodgment-deferral-and-releases-new-guidance.pdf?utm_source=openai))
- A transitional compliance approach includes relief from penalties if entities have taken **“reasonable measures”** to comply, even if not everything is perfect initially.([ey.com](https://www.ey.com/content/dam/ey-unified-site/ey-com/en-au/technical/tax/documents/ey-tax-alert-australian-taxation-office-announces-pillar-two-lodgment-deferral-and-releases-new-guidance.pdf?utm_source=openai))
## What Companies Should Do Now — Actionable Steps
- **Assess Scope**: Determine whether your group meets revenue thresholds for Pillar Two, and identify constituent entities.
- **Gather Data Early**: Put in place systems to collect relevant financial, tax, and foreign income data — especially important where entities have joint venture structures.
- **Prepare for Deferral**: Use the 30-day lodgment deferral intelligently to align internal timelines. It allows extra time, but should not be used as excuse for delay.
- **Document Reasonable Measures**: Maintain records of steps taken — internal memos, board papers, system upgrades — that show good faith efforts to comply.
## Implications for Tax Strategy and Risk
- **Effective Tax Rate (ETR) pressures**: Low tax jurisdictions or entities with generous credits may see top-up tax liability. Tax planning will increasingly need to manage the spread of tax rates globally.
- **Trust, joint venture and subsidiary structure bugs**: Who counts as a constituent entity, how joint operations are treated — ambiguity here can affect calculations and liability.
- **Regulatory uncertainty**: While some guidance and rulings have been released, others are still in draft; staying informed and participating in consultation will be advantageous.
### Example Scenario
A multinational with headquarters in Australia and subsidiaries abroad has foreign subsidiaries in low tax jurisdictions. Without planning, it might trigger UTPR (Undertaxed Profits Rule) top-up payments. But if it strengthens tax compliance in those jurisdictions and leverages available tax credits, it could reduce exposure. Keeping good records of foreign tax credits and negotiating with overseas affiliates becomes essential.
## Conclusion
Pillar Two isn’t just another set of rules — it reshapes the landscape for international tax. Companies in scope must start aligning their compliance, governance, and data reporting now. Thoughtful planning, documentation and awareness of transitional reliefs will be the difference between manageable compliance and costly surprises.