Guillermo Villaseñor Tadeo, Global

Ranked in 1 Practice Areas

Band 4

Tax: Controversy

Mexico

6 Years Ranked

Ranked in Guides

Latin America 2025

About

Provided by Guillermo Villaseñor Tadeo

Global

Practice Areas

Tax

Career

Guillermo has more than twenty years of experience in tax planning, including taxation of corporate restructuring transactions, mergers, acquisitions, and general tax advice, especially for business and multinational groups with operations in Mexico where he provides advice to achieve fiscal efficiency and provide assistance in developing tax policies for ongoing operations. His experience extends to transfer pricing, including the legal analysis of the implementation of policies, documentation and elaboration of economic studies and defense files to protect companies against potential tax investigations. Guillermo has represented different industries before the Mexican Judiciary through constitutional (“amparo”) proceedings to contest the creation or amendments of tax laws that produce relevant economic negative effects, achieving tax refunds and the protection to future payments. He has also assisted multinational companies in complex cross-border tax litigation, in transfer pricing adjustments, cost-sharing arrangements, multinational restructures, and potential re-characterization of intercompany payments being able to successfully defend cases in the investigation stage or to reduce potential liabilities before contesting deficiencies before the Federal Tax Court. Guillermo is a member of the firm’s Energy Industry Group.

Professional Memberships

American Chamber of Commerce Tax Committee; Canadian Chamber of Commerce; International Fiscal Association; Association of International Petroleum Negotiators

Chambers Review

Provided by Chambers

Chambers Global Guide

Tax: Controversy - Mexico

Band 4

Individual Editorial

Mexico City-based partner Guillermo Villaseñor Tadeo co-leads the tax department, focusing his practice on significant contentious matters.

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Strengths

Provided by Chambers

We are very happy with the service given by Guillermo Villaseñor Tadeo, who is an excellent lawyer. He always supports us and is proactive, sending us relevant information for our business.

Tax: Controversy respondent
Chambers Global Guide

We are very happy with the service given by Guillermo Villaseñor Tadeo, who is an excellent lawyer. He always supports us and is proactive, sending us relevant information for our business.

Tax: Controversy respondent
Chambers Global Guide

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Chile

Banking & Finance

Pedro García

Band 1

Guillermo Villaseñor Tadeo

Global Guide 2025

Band 4 : Tax: Controversy