Guillermo Aguayo | White & Case LLP International Law Firm, Global Law Practice
 Guillermo Aguayo-Garza
 Guillermo Aguayo-Garza

Guillermo Aguayo

Local Partner, Mexico City

T +52 55 5540 9609

E [email protected]


Guillermo's professional practice focuses on tax law. As part of his practice, he constantly provides tax advice to clients in cross-border and domestic mergers, acquisitions and corporate reorganizations and in general advises and represents clients in complex tax matters. Guillermo also advises clients on Mexican customs and foreign trade issues working together with the Firm's International Trade experts from other jurisdictions.

Bars and Courts

  • Authorized to practice law in Mexico


  • LLM, Taxation, Georgetown University Law Center
  • Attorney at Law (Abogado), Universidad de Monterrey, Campus Monterrey


  • Spanish
  • English


Has been a leading tax advisor to one of the most important railroad freight companies with operations in Mexico. Guillermo has advised and represented such client in various tax matters of strategic importance, including an ongoing defense against a multimillion tax assessment.

For years has been a tax advisor to one of the largest automakers and its affiliates in numerous domestic and international tax issues, including representation of the companies in tax audits and litigation and on a wide range of tax matters.

Has advised numerous clients on customs and foreign trade related matters, such as the restructuring and expansion of IMMEX operations and has representation clients in custom and foreign trade audits, on administrative customs procedures and on customs related litigation. Working together with International Trade experts from other jurisdictions Guillermo has participated in negotiations among authorities regarding the amendment of rules of origin set forth in free trade agreements entered into by Mexico.

Constantly advises various banks and financial institutions in various tax matters related to investment banking, securities, commercial banking, syndicated loans, asset management and day-to-day operations.

Advised a well-known investment banking advisory firm in the structuring and placement of two Mexican exchange traded funds.

Provided tax advice to a Mexican non-bank mortgage and construction lender in its debt restructuring and bankruptcy processes.

Advised banks, multilaterals and investors in the structuring of infrastructure projects.

Provided tax and legal counsel to various companies and international groups in structuring real estate projects for the tourist, commercial and industrial sectors.

Advised investment bankers, offshore firms and investors in matters related to tax compliance, structuring, repatriation and disposition of inbound and outbound investments of companies and high-net-worth individuals.

Advised clients in the structuring of personal and family wealth preservation and estate plans.