The global minimum tax appears to be working. The OECD’s 2026 Economic Impact Assessment, released on July 15, found that the 15% floor on corporate taxation for large multinationals generated between €79 billion and €109 billion (roughly $90–$124B) in its first year of implementation.
The OECD found little evidence that the tax caused job losses or dampened investment. Companies subject to the rules showed higher effective tax rates, but they didn’t respond by gutting their workforces or fleeing to tax havens en masse.
The numbers in context
That $90–$124B in first-year revenue represents 2.4–3.4% of global corporate income tax receipts. The revenue haul fell short of the OECD’s prior projections, which had estimated annual long-run returns between $155B and $192B. So the tax is delivering roughly 60–65% of its projected ceiling.
The tax applies to multinational enterprises with annual revenues of at least €750 million. More than 60 jurisdictions have now enacted the GMT rules, part of a broader agreement involving over 135 countries and territories that was established back in 2021. The first Global Investment Revenue filings were due by June 30, 2026.
