This report provides a comprehensive overview of tax reform trends, offering cross-country comparisons and tracking policy developments over time. This edition describes tax reforms implemented in 2024 across 86 jurisdictions, including all OECD countries. The report finds that governments increasingly implemented reforms to raise revenues for specific spending needs – most notably through measures aimed at funding current and future expenditures linked to population ageing.

The report also provides an overview of the macroeconomic environment and tax revenue context in which these tax reforms were made, highlighting how governments used tax policy to respond to short- and long-run structural challenges.

Key findings

• A continuation of the 2023 trend away from the broad tax relief measures seen during the COVID-19 pandemic solidified in 2024 with a mix of rate increases and targeted tax support across all major tax types.
• Signs that the downward trend in corporate income tax rates has halted or is reversing grew stronger in 2024.
• A trend emerging in 2024 was the introduction or expansion of personal income tax relief to support employment.
• A notable shift in 2024 was the move away from temporary fuel tax reliefs towards increases in fuel excise taxes.
• The use of tax policy to support the transition to a low-carbon economy continued to broaden.
• Property tax reforms predominantly focused on rate cuts and base narrowing measures.
• Countries further expanded the use of tax policy to support the transition to a low-carbon economy in 2024.