Globalisation has had positive effects on the development of tax systems and has encouraged countries to engage in base broadening and rate reducing tax reforms. However, it has also created an environment in which tax havens thrive and in which governments may be induced to adopt harmful...

This Report describes progress made in identifying and addressing harmful tax practices within and outside the OECD. In addition to reporting on the work done in connection with tax havens, it also discusses the work related to Member countries and non-Member economies. It is a follow-up to the...

Illicit financial flows (IFFs) such as tax evasion are a major policy challenge for developing and emerging economies, in particular as the COVID-19 pandemic has drained domestic resources. This report presents results from a joint project between the OECD and the National Treasury of South...