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The Global Minimum Tax (Pillar Two): What Multinationals Need to Know
- May 12
- 1 min read
The global minimum tax was born as a direct response to decades of aggressive tax planning. For years, large multinational enterprises (MNEs) structured cross-border operations to channel profits through low-tax jurisdictions. This triggered a global race to the bottom in corporate taxation. In response, over 140 jurisdictions of the OECD Inclusive Framework agreed on a coordinated solution: a 15% minimum effective tax rate on every MNE group with consolidated revenues above €750 million.
How the Top-Up Tax Works
The mechanism is straightforward. When an MNE's effective tax rate in a given country falls below 15%, a top-up tax is triggered. This additional tax is collected either by the low-tax jurisdiction itself (through a Qualified Domestic Minimum Top-up Tax or QDMTT), or by another country through the Income Inclusion Rule (IIR) or the Under-Taxed Profits Rule (UTPR). Low-tax profits can no longer escape the minimum threshold.
The OECD Implementation Roadmap
On April 22, 2026, the OECD released a practical 5-module toolkit for tax administrations. It covers:
Identifying in-scope MNE groups.
Legislating the rules.
Organizing internal resources and IT systems.
Designing compliance procedures.
Exchanging information via the GloBE return.
With over 60 jurisdictions already implementing the rules, the toolkit promotes a fully digital process and harmonized filing deadlines.
Latin America's Two Speeds
Within LATAM, Brazil stands out as the regional showcase, having already implemented its QDMTT through recent legislation. Mexico, by contrast, has yet to legislate the global minimum tax, despite hosting close to 2,000 MNE groups potentially within its scope.
As Victor Maldonado emphasizes: The question for countries and companies is no longer whether to implement, but how soon and on what terms.
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