OECD Issues New Global Minimum Tax Guidance Affecting More Than 140 Countries

The Organisation for Economic Co-operation and Development (OECD) has issued updated technical guidance regarding the implementation of Pillar Two of the global minimum tax framework. It addresses three main areas directly affecting multinational enterprise groups operating in over 140 countries that have joined the framework to date.

The first area includes clarifications on the mechanisms for calculating the 15% minimum tax on profits earned in low-tax jurisdictions, including rules for dealing with local tax exemptions and deductions and their impact on group liabilities. The second area addresses safe harbour provisions for the Qualified Domestic Top-up Tax (QDMTT), which allows host countries to collect tax differentials instead of leaving them to the headquarters country. The third area outlines the requirements for the GloBE Information Return (GloBE IR) to be submitted to tax authorities.

This guidance comes at a critical stage when many countries are accelerating efforts to enact Pillar Two into domestic legislation, highlighting the importance of technical clarity to help companies build accurate compliance systems and avoid double or conflicting application of rules across different jurisdictions.

This guidance particularly affects large multinational groups with consolidated revenues exceeding 750 million euros, which is the target group under the current scope of Pillar Two, although expectations point to the possibility of expanding this scope in the future to include smaller companies.

What do these terms mean?

Pillar Two: Part of an international tax reform led by the OECD that obliges countries to impose a minimum tax of at least 15% on the profits of large multinational enterprises, aiming to curb tax evasion through tax havens.

Qualified Domestic Top-up Tax (QDMTT): A mechanism that allows the host country to collect the tax differential resulting from its effective tax rate being lower than the global minimum, rather than having it collected by the parent company's headquarters country.

GloBE Information Return (GloBE IR): A tax disclosure document submitted by multinational groups to tax authorities in the countries where they operate, detailing the distribution of profits and taxes paid in each jurisdiction.