29 OECD Countries Enacted Pillar Two by 2024: Who Moved and Who Held Back
Of 38 OECD countries, 29 enacted the OECD Global Minimum Tax (Pillar Two) with effective date 2024-01-01. 6 remain not-started, 3 are proposed, a 76% adoption rate in the first full year.
Research period:
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Compiled by PlainGlobalPay, International Salary Comparison Editorial Process
Research Question
Across 38 OECD countries, how has Pillar Two (OECD Global Minimum Tax) adoption progressed, which countries moved first, which are holding back, and what is the first-year adoption rate?
Methodology
We track each OECD country's Pillar Two status, whether the rules are enacted, proposed, or not yet started, along with its effective date, minimum rate, and implementing legislation. We tallied the statuses across all 38 members and report the first-wave list of countries with enacted rules and their effective dates.
Findings
As of the 2024-01-01 effective date, 29 of the 38 OECD members had enacted domestic Pillar Two legislation, a 76.3% first-year adoption rate; six members had not started and three had proposals in progress. Each country profile pairs its Pillar Two status with its corporate and personal income-tax rates, VAT, and purchasing-power factor.OECD Pillar Two Tracker, Country-by-Country Implementation Status, 2024
The 10-country first-wave cohort
Ten countries led the first wave, all effective 2024-01-01: Australia, Austria, Belgium, Switzerland, Czechia, Germany, Denmark, Spain, Estonia, and Finland.OECD Pillar Two Tracker, Country-by-Country Implementation Status, 2024 Most already levy corporate-tax rates well above the 15% floor, so the rules bite mainly on profit shifted abroad rather than on domestic earnings. Switzerland's rate varies by canton and is now subject to the floor.
Germany's country profile shows a top personal income-tax rate of 45% plus the solidarity surcharge. Across this cohort, VAT ranges from Estonia's 22% to Denmark's 25%. Pillar Two's Income Inclusion Rule and Undertaxed Profits Rule together apply to multinational groups with revenue above the €750M threshold.EU Council Directive 2022/2523, Global Minimum Tax Directive, 2022
76.3% first-year adoption from a coordinated OECD framework
The 76.3% first-year rate, 29 of 38, is fast by historical standards: earlier OECD BEPS waves took three to five years to reach comparable coverage.OECD BEPS Action 1, Tax Challenges of the Digital Economy, 2015 The coordinated 2024-01-01 effective date across all 29 adopters reflects the EU's directive-bound timeline, which pulled the European bloc in together.
The remaining nine members, six not yet started and three with proposals, leave the United States as the most consequential non-adopter; US multinationals operating in adopting countries still face the Undertaxed Profits Rule backstop. Among the adopters, statutory corporate rates sit above the 15% floor, and VAT ranges from Luxembourg's 17% to Hungary's 27%. The Pillar Two tracker lists all 38, sortable by status and effective date; the full country directory links each to its tax profile.
OECD Pillar Two adoption status (38 countries)
Global minimum-tax implementation as of 2024
Highest statutory corporate income tax rates
The headline CIT rates Pillar Two's 15% floor interacts with
Discussion: Wider Implications
The 76.3-percent adoption share masks meaningful regional asymmetry. The European Union as a directive-bound bloc accounts for over half of the early adopters; the United Kingdom, Norway, Switzerland complete the European cluster. Asia-Pacific adopters, Japan, South Korea, Australia, joined later and on different mechanisms (Japan's IIR-only, Korea's GMRT). The United States remains the consequential non-adopter. US Congressional gridlock has prevented legislation; US multinationals operating in Pillar Two countries face the UTPR (Undertaxed Payments Rule) backstop. This asymmetry is structural, not a temporary lag, and shapes where the corporate top-up tax actually accrues. European treasuries collect from US MNE European subsidiaries; the US treasury does not collect from European MNE US subsidiaries (no IIR).
QDMTT (Qualified Domestic Minimum Top-up Tax) is the key implementation choice. A QDMTT lets a country collect the top-up itself rather than ceding it to a peer. Most European adopters paired Pillar Two with a QDMTT; that collective revenue choice redistributes corporate tax revenue toward operating-jurisdiction treasuries and away from headquarters-jurisdiction treasuries. For tax practitioners, that single design choice is the most consequential element of Pillar Two implementation. See PlainGlobalPay methodology for the Pillar Two adoption data source and the adoption-tracking process.
Looking forward, the adoption curve is unlikely to reach one-hundred-percent. Lower-tax jurisdictions (Bermuda, the Cayman Islands, the British Virgin Islands) face limited domestic political pressure to adopt because their economies depend on the rate-arbitrage that Pillar Two seeks to neutralize. The treaty mechanism is still worth tracking, a UTPR collected in a third country still reduces overall arbitrage even when the lowest-tax jurisdiction does not adopt. See /calculator for the individual-side wedge that runs parallel to corporate Pillar Two.
Extended Methodological Notes
Pillar Two implementation is still in early operational mode; the first full year of QDMTT collections (calendar 2024) is being audited through 2026, and revised revenue estimates from the OECD itself are expected mid-2026. Early indications suggest the original $220 billion-per-year global revenue estimate is roughly tracking, with European treasuries collecting the largest share due to their position as headquarters jurisdictions for many multinational groups.
The interaction between Pillar Two and existing US GILTI (Global Intangible Low-Taxed Income) regime is the most consequential open question. GILTI blends foreign income globally rather than country-by-country; Pillar Two adopts the country-by-country test. The two regimes compute different effective rates on the same multinational. US Treasury guidance on the GILTI/QDMTT interaction is expected to evolve; tax practitioners should track Treasury Notice publications quarterly.
For non-tax-professionals, the takeaway is simpler. Pillar Two is the most consequential international corporate-tax reform since the introduction of transfer-pricing regimes in the 1970s. Its impact on workers is mostly indirect, slightly higher corporate tax revenue funds slightly larger public budgets in most adopter jurisdictions; firm-location decisions become slightly less rate-driven and slightly more substance-driven. The wedge analysis on PlainGlobalPay tracks the parallel individual-side reality. See /calculator to compare countries on the individual-tax side that runs alongside Pillar Two.
What this analysis cannot tell us
Pillar Two is a corporate-tax framework. It applies to multinationals with annual revenue above €750 million and does not directly change personal income tax, social security, VAT, or capital gains for individuals. The 29-country 'enacted' count reflects domestic legislation; not every enacted country has fully implemented transitional safe harbors or Qualified Domestic Minimum Top-up Taxes (QDMTT). The not-started and proposed designations are subject to rapid change as 2026 legislative sessions progress. PlainGlobalPay's Pillar Two adoption data does not track effective dates post-2025 for countries that enacted in the first wave, all show 2024-01-01 effective date.