Global Forum on Transparency and Exchange of Information for Tax Purposes

A Toolkit for Becoming a Party to the Convention on Mutual Administrative Assistance in Tax Matters


Jointly developed by the OECD and the Council of Europe in 1988, and amended through protocol in 2010, the Convention on Mutual Administrative Assistance in Tax Matters (MAAC) has become the leading international treaty for multilateral co-operation in tax matters. As of July 2020, 137 jurisdictions are participating.

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» Exchange of tax information: a butterfly effect on domestic resource mobilisation (blog)

» Find out more about the MAAC



Providing detailed guidance, the toolkit outlines the benefits of joining the MAAC. It offers an overview of the MAAC’s main provisions, its relationship with other treaties and legal instruments, and a step-by-step guide to becoming a Party, from the preparation stage to the signature and deposit of instruments of ratification, acceptance or approval.

The toolkit is designed to facilitate countries reaching an informed decision on whether to join the MAAC and to provide guidance on the steps to be taken and how to better prepare for joining.


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