This is the fifth edition of Tax Policy Reforms: OECD and Selected Partner Economies, an annual publication that provides comparative information on tax reforms across countries and tracks tax policy developments over time. The report covers the latest tax policy reforms in all OECD countries, as well as in Argentina, China, Indonesia and South Africa.

This first edition of Tax Policy Reforms in the OECD focuses on the tax reforms that were introduced in 2015 and identifies the most significant tax policy reforms as well as common tax policy trends across groups of countries.

This report is the ninth edition of the OECD's Tax Administration Series. It provides internationally comparative data on aspects of tax systems and their administration in 59 advanced and emerging economies.

Tax administration improvements have contributed significantly to a doubling of China’s tax-to-GDP ratio and the substantial reduction in taxpayers’ compliance costs since the mid-1990s. This paper describes the key features of China’s tax administration and their evolution over the last 20 years. It also identifes emerging challenges to the tax system and areas where further tax administration improvements are needed to sustain tax revenue and reduce taxpayers’ compliance costs in the future.

This book addresses sixteen different reform proposals that are urgently needed to correct the fault lines in the international tax system as it exists today, and which deprive both developing and developed countries of critical tax resources. It offers clear and concrete ideas on how the reforms can be achieved and why they are important for a more just and equitable global system to prevail. The key to reducing the tax gap and consequent human rights deficit in poor countries is global financial transparency. Such transparency is essential to curbing illicit financial flows that drain less developed countries of capital and tax revenues, and are an impediment to sustainable development. A major break-through for financial transparency is now within reach. The policy reforms outlined in this book not only advance tax justice but also protect human rights by curtailing illegal activity and making available more resources for development. While the reforms are realistic they require both political and an informed and engaged civil society that can put pressure on governments and policy makers to act.

This report investigates how tax structures can best be designed to support GDP per capita growth.

Risks to macroeconomic stability posed by excessive private leverage are significantly amplified by tax distortions. ‘Debt bias’ (tax provisions favoring finance by debt rather than equity) has increased leverage in both the household and corporate sectors, and is now widely recognized as a significant macroeconomic concern. This paper presents new evidence of the extent of debt bias, including estimates for banks and non-bank financial institutions both before and after the global financial crisis. It presents policy options to alleviate debt bias, and assesses their effectiveness. The paper finds that thin capitalization rules restricting interest deductibility have only partially been able to address debt bias, but that an allowance for corporate equity has generally proved effective. The paper concludes that debt bias should feature prominently in countries’ tax reform plans in the coming years.