What Is the Global and Domestic Minimum Tax?
Australia has adopted the OECD’s model rules under Pillar Two, introducing a global minimum tax (often called GloBE) and complementing domestic rules that ensure multinational enterprises (MNEs) pay a minimum level of tax both abroad and in Australia. These rules target tax base erosion and profit shifting by large global groups. (apiportal.ato.gov.au)
Who Needs to Comply?
- MNE groups with global revenues above EUR 750 million or equivalent are generally in scope. These include subsidiaries, trusts, or group entities with foreign operations.
- Entities must report under combined global and domestic minimum tax returns using ATO’s specific APIs. “Group Entities” and “Designated Local Entities” will be involved in this reporting scheme. (apiportal.ato.gov.au)
Key Changes & Requirements
- Lodgement obligations: Using the Global and Domestic Minimum Tax Return API, entities must complete reporting obligations for “Foreign lodgment notification,” Australian “IIR/UTPR Tax Return,” and the “Domestic Minimum Tax Return.” (apiportal.ato.gov.au)
- Timelines: These rules have commenced, with API services now active and functioning as of at least early May 2026. (apiportal.ato.gov.au)
- Compliance costs: Entities will need robust data systems for tracking profit, tax paid abroad, and related metrics. Professional tax and legal advice will be imperative.
Concrete Example
- A tech company headquartered in Australia with subsidiaries in multiple low-tax jurisdictions must calculate the income subject to the GloBE rules, the tax that would be paid if the minimum rate applies, and additional top-up taxes due domestically. If the foreign effective tax on profits is less than the minimum rate, Australia’s domestic minimum tax rules may apply for the shortfall.
How to Prepare Now
- Identify group entities and assess global revenue over thresholds.
- Evaluate existing tax structures—offshore finance companies, intellectual property holding entities may be reorganized.
- Upgrade systems for data collection—profits, deductions, current foreign taxes paid, etc.
- Engage tax experts to interpret obligations under AIUTR, UTPR, and other components.
- Use the ATO’s API guidance, including test scenarios, to ensure accurate reporting.
Australia’s adoption of global minimum tax rules marks a watershed moment in international taxation. Entities need to anticipate new compliance burdens—and recalibrate tax planning across jurisdictions to align with the changing global regime.