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Ignacio Arráez | Partner


+34 91 577 50 20


“He is a very sensible advisor and has a deep knowledge of tax regulation in Spain, which makes him very business-oriented”


Ignacio has over 20 years of professional experience. He holds a degree in Law from the Autonomous University of Madrid and a Master’s in Tax Law from the San Pablo CEU University, where he graduated top of his class.

Before founding MAIO Legal, Ignacio worked in the legal-tax advisory of Telefónica de España S.A., and was a partner at Cremades & Calvo-Sotelo, where he also headed the Tax Law department. Later, he was the managing partner of the Tax Law department at Castro, Sueiro & Varela and director at KPMG Abogados.

He is currently the Vice President of the AEDAF (Spanish Association of Tax Advisors), which brings together nearly 4,000 professionals in tax advisory. Previously, he led the Madrid-Central Area division of the said association, is an honorary professor in tax matters at the Complutense University of Madrid, a speaker, and co-author of several books on tax topics. He also regularly publishes articles on current tax issues in economic and specialized press.

He has also been a member of the Board of Directors for various companies, including the publicly traded company PRIM S.A., where he was the Chairman of the Audit Committee and a member of the Appointments and Remuneration Committee.


Master’s in Tax Law from San Pablo CEU University

Degree in Law from the Autonomous University of Madrid





Spanish Association of Tax Advisors (AEDAF)

Illustrious Bar Association of Madrid

Awards and Recognitions

Prominent lawyer in Taxation by the Chambers & Partners directory

Recognized lawyer in Tax Law by BestLawyers

Teaching activity

Professor at the Complutense University of Madrid

Previously, professor at the Business School of San Pablo CEU University

Recent publications

“Global E-Business Law & Taxation” at Oxford University

“Professional Corporations” published by La Ley and sponsored by Iberdrola

“Tax Fraud in Spain” published by Aranzadi

“Taxation of the Collaborative Economy” published by La Ley and sponsored by Iberdrola