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+55 (21) 3550-1370

Practice Areas

Diogo Ferraz



Diogo has extensive experience in all areas of tax law. In tax advisory, he has been rendering consults and legal opinions on the interpretation of tax law, advising the tax structuration of clients operations and developing efficient tax planning. In tax litigation, he works actively in judicial and administrative proceedings, both challenging unlawful tax assessments and creating tax saving opportunities to clients.


Ph.D (cum laude), Financial and Tax Law, Universitat de Barcelona – Spain, (2015).
LL.M, Public Law, Universidade do Estado do Rio de Janeiro (UERJ) (2008).
Post-graduate degree in Tax Law, Fundação Getúlio Vargas (FGV) (2005).
LL.B, Universidade Cândido Mendes (2003).

Additional Activities

Member of the Latin American Regional Committee of the ABDF (Brazilian branch of the International Fiscal Association, IFA) and the ILADT (Latin American Institute of Tax Law); member of the research group for the OECD’s BEPS project, coordinated by UERJ together with Vale S/A; and member of the group working on the European project for a financial transaction tax (FTT) for the European Union, coordinated by the International Bureau of Fiscal Documentation (IBFD).
Coordinator for the Advanced Tax Case Law Program of the Tax Case Law Project (PJT), for which GDT-Rio is partnering the ABDF. Visiting professor at FGV-Rio and at the graduate degree program in Tax Law at UNESA.


Authored books on corrective taxation on financial markets (“Los Tributos del Mercado Financiero: una perspectiva extrafiscal, Madrid: Marcial Pons, 2016) and on the relation between the supremacy of the public interest and tax law (A Supremacia do Interesse Público e o Direito Tributário, Porto Alegre. Nuria Fabris, 2012). Author of many articles on tax law published in books and journals.