OECD Pillar Two in 2024: EUR 79–109 Billion Raised, Below Forecasts, No Job Losses

Revenue Generated vs. OECD Forecasts

Countries applying the 15% minimum tax on large multinationals raised an estimated €79 to €109 billion in additional corporate tax revenue in 2024 . This was below the OECD's earlier projections that full implementation would yield global annual revenue gains of $155–$192 billion (a 6.5–8.1% increase in global corporate income tax revenues) . The OECD's January 2024 economic impact assessment had estimated the rules would reduce global low-taxed profit by about 80% .

Independent estimates of the long-run revenue potential vary widely. Some academic models project $68–105 billion annually once fully phased in, while the OECD's own estimates range up to $220 billion . The EU Tax Observatory estimated that EU Member States alone could receive €55–67 billion yearly from a 15% minimum top-up tax .

Reasons for the Revenue Gap

The gap between first-year actuals and long-run projections was attributed to several factors:

Phased and partial implementation: Not all jurisdictions that agreed to Pillar Two had enacted legislation in time for the January 1, 2024 effective date. Around 45–55 jurisdictions had taken concrete implementation steps as of early 2024 .

Transitional safe harbors and carve-outs: The substance-based income exclusion (SBIE) and transitional safe harbors temporarily exempted many MNEs from top-up tax calculations, significantly reducing first-year liabilities . A Deloitte study of the 50 largest Swiss publicly listed companies found that many escaped supplementary taxes thanks to these transitional arrangements, with over three-quarters of additional tax revenue originating from a single corporation .

Delayed adoption by key jurisdictions: The U.S., home to the world's largest concentration of multinationals, did not implement Pillar Two and instead secured a side-by-side safe harbor that deems the U.S. tax system compliant, further lowering global top-up tax collections .

Early compliance adjustments: Many companies restructured operations or engaged in tax planning to bring their effective tax rates closer to 15%, reducing the volume of profits subject to top-up tax in the first year .

Impact on Investment and Jobs

No measurable negative effects: The OECD found little evidence that Pillar Two caused any material loss of jobs or reduction in business investment across adopting countries . The revenue gains were not accompanied by the "race to the bottom" in corporate tax rates that critics had warned could stifle economic activity.

Reduced profit shifting: The OECD estimated the minimum tax would cut global shifted profits by roughly half, narrowing tax-rate differentials between investment hubs and other jurisdictions . The OECD's January 2024 working paper estimated that the global minimum tax would reduce low-taxed profits by about 80%, from an average of $2,143 billion between 2017-2020 to $653 billion .

Adoption Status Across Countries

Widespread but uneven adoption: Over 140 countries in the OECD/G20 Inclusive Framework agreed to Pillar Two in principle . The EU member states implemented the rules effective January 1, 2024, and other major economies including Japan, Australia, South Korea, the UK, Canada, and many others enacted legislation during 2024 .

Around 45–55 jurisdictions had either implemented or were in advanced stages of enacting Pillar Two as of early 2024 . However, adoption has been slower than expected in some regions. As of early 2024, 21 countries in Europe and 4 countries elsewhere had "final law in force" to implement all or parts of Pillar Two .

U.S. Position

No U.S. adoption and active opposition: The U.S. did not implement Pillar Two. President Trump issued an executive order on Day One of his second term directing that the OECD deal "have no force or effect" for the U.S. . Congress has shown strong bipartisan opposition to the global minimum tax . The Tax Cuts and Jobs Act of 2017 (TCJA) implemented a different minimum tax on foreign earnings (GILTI), which was used as a model for certain Pillar Two design elements .

Side-by-side safe harbor secured: In early 2026, the U.S. Treasury reached an agreement with the Inclusive Framework to create a new "side-by-side" safe harbor that effectively deems the U.S. tax system compliant with Pillar Two, exempting U.S.-headquartered MNE groups from foreign top-up taxes . The U.S. is the only jurisdiction listed in the OECD's Central Record as having a qualified regime for purposes of this safe harbor .

Uncertainty and Limitations

The first-year revenue figure (€79–109 billion) is a preliminary OECD estimate released in July 2026 . Actual collections may be revised as more jurisdictions file complete data. The gap between first-year results and projections may close as more jurisdictions implement domestic minimum top-up taxes and as transitional provisions expire. The OECD has noted that the minimum tax is expected to have a larger impact once the temporary safe harbor rules expire after 2026 .