AS per one OECD study on Global Minimum Tax (GMT), effective tax rates have increased by around 1-2 percentage points, largely driven by higher corporate tax payments. The effects were most pronounced among firms with greater opportunities for tax planning, indicating that the reform is beginning to achieve its intended objective of curbing profit shifting. The findings also reveal no evidence of adverse short-term impacts on investment or employment.

These early results offer valuable insights into the practical effects of the GMT and provide a robust foundation for its continued monitoring and evaluation.