Entity Setup
Global Minimum Tax (Pillar Two) and Your Multinational Business: Navigating Australia’s New Reporting Rules
Australia has enacted the OECD’s Pillar Two rules—learn how the global and domestic minimum tax laws affect your multinational group’s reporting, timelines, and compliance responsibilities.
By NomadicTax Research Team • 5-8 min read • November 17, 2025
## What are GloBE Rules and Australia’s Domestic Minimum Tax?
* The GloBE (Global Anti-Base Erosion) Rules require multinational enterprise groups (MNEs) to ensure a **minimum 15% tax rate in each jurisdiction** where they operate. ([softwaredevelopers.ato.gov.au](https://softwaredevelopers.ato.gov.au/Pillar2?utm_source=openai))
* Australia’s domestic minimum tax complements GloBE rules and applies to **entities with income-years starting on or after 1 January 2024**. ([softwaredevelopers.ato.gov.au](https://softwaredevelopers.ato.gov.au/Pillar2?utm_source=openai))
## Key Changes at a Glance
| Area | Requirement | Effective From |
|---|---|---|
| Income Inclusion Rule | Applies for income-years starting on or after **1 Jan 2024**. ([softwaredevelopers.ato.gov.au](https://softwaredevelopers.ato.gov.au/Pillar2?utm_source=openai)) | Entities must include any low taxed profits. |
| Undertaxed Profits Rule | Applies from 1 Jan 2025. ([softwaredevelopers.ato.gov.au](https://softwaredevelopers.ato.gov.au/Pillar2?utm_source=openai)) | Additional top-up tax obligations. |
| Reporting Obligations | Multinational groups must **lodge a GloBE Information Return (GIR)** and relevant Australian domestic forms. ([softwaredevelopers.ato.gov.au](https://softwaredevelopers.ato.gov.au/Pillar2?utm_source=openai)) | Timing-based on entity’s year end (e.g. first return 18 months after year end). |
## Who is In Scope?
* Multinational entities with sufficient global scale and in multiple jurisdictions.
* Entities earning profits in jurisdictions where effective tax rate is below 15%.
* Australian-resident parent entities with foreign subsidiaries/branches, or foreign-resident parent entities with Australian operations, depending on structure.
## Reporting & Compliance Steps
1. **Determine status**: Are you an entity required to comply? Review thresholds under the new legislation and check if past year-ends fall on or after 1 Jan 2024 or 2025. ([softwaredevelopers.ato.gov.au](https://softwaredevelopers.ato.gov.au/Pillar2?utm_source=openai))
2. **Collect data early**: Financial statements, tax payments in each jurisdiction, and external documentation needed for calculating effective tax rates.
3. **Dedicate resources to new systems**: Accounting software must support reporting in GIR format and handle domestic minimum tax calculation.
4. **Lodge GIR and Australian forms**: Begin with filing 18 months after your first year-end; ensure forms meet XML schema and ATO approval. ([softwaredevelopers.ato.gov.au](https://softwaredevelopers.ato.gov.au/Pillar2_20250305?utm_source=openai))
## Example
A large multinational group with Australian parent and subsidiaries in jurisdictions with lower tax rates may need to pay top-up tax in Australia. For example, profits taxed at 10% overseas may trigger additional liability so the effective combined rate is 15%. This must be calculated and reported via GIR, and if necessary, top-up tax paid into Australia under domestic minimum tax rules.
## Actionable Advice
* Engage external advisors with expertise in OECD international tax rules.
* Perform a gap analysis comparing current internal tax reporting versus requirements under Pillar Two.
* Build capability in calculating low taxation, adjusting for deductions, credits, and differences in rules.
* Monitor ATO guidance and draft rulings—for example, **draft Practical Compliance Guideline PCG 2025/D3** was released for feedback and gives transitional guidance. ([softwaredevelopers.ato.gov.au](https://softwaredevelopers.ato.gov.au/Pillar2_20250723?utm_source=openai))
**Final Thoughts**: For MNE groups operating in and through Australia, the global and domestic minimum tax rules are not just proposals—they are in force. Understanding which rules apply to your entity, calculating exposure, and meeting reporting obligations are critical steps to avoid penalties and ensure tax compliance under this new international tax regime.