Carlos Loaiza Keel


Languages Known:

  • English
  • Portuguese
  • Spanish


Carlos Loaiza Keel

Local partner


Carlos Loaiza has over 12 years' professional experience in the tax, M&A and corporate law practice areas, at both international and local levels.

Having started off his career in the Tax & Legal Services department of PwC in Montevideo, he joined the Transfer Pricing and International Taxation team at Garrigues' Madrid office. In 2009, he worked for Barros & Errázuriz in Santiago de Chile and then joined Sanguinetti & Asociados in Uruguay as a partner. Both of these are leading firms in their respective jurisdictions.  In 2014, he joined the office of Proskauer Rose LLP in New York as a visiting partner, before returning to Garrigues in 2015 to participate in its Latin American expansion project.

Throughout his professional career, Carlos has advised multinational groups with investments in Europe and Latin America, and participated in some of the most important M&A deals taking place in this continent, such as the purchase by the Colombian group SURA of assets of ING throughout Latin America (involving a sum of approximately US$ 3.2 million), which was classed as "Deal of the Year 2011" by the British magazine Latin Lawyer; or the purchase by Arauco-Stora in 2009 of assets of the ENCE Group in Uruguay (involving a sum of approximately US$ 400 million), the largest such transaction to be executed in Uruguay to date.

Carlos is the director of the International Tax Law department at Universidad de Montevideo and directs Consultor Tributario, a blog and technical section sponsored by Thomson Reuters in El Observador, a leading economic newspaper in Montevideo. He is also a member of the Visual Arts Workshop at the Torres García museum.

He has received recognition as a leading lawyer in his practice area from Chambers Latin America and Latin Lawyer, as well as from Fundación Euroamérica, for his work as a collaborator in Latin America. Since 2009, he has directed the Global Alumni project at Centro de Estudios Garrigues.

National Reporter of the International Bar Association's Tax Committee 2017 and member of the Economic National Academy, Uruguay.

Academic background:

Carlos has a PhD in Law from Universidad de Montevideo, Uruguay, (2003) (summa cum laude, 1st place in student ranking).

Management Program for Leaders of the Americas by IESE Business School (Universidad de Navarra, Nueva York), IAE Business School (Universidad Austral, Buenos Aires) and IPADE Business School (Universidad Panamericana, México), 2016. 

In 2007, he obtained a Master’s Degree in Taxation from Centro Europeo de Estudios Garrigues.

In 2009 he gained an Executive Master's Degree in Business Law from Harvard Law School and Centro Europeo de Estudios Garrigues.

In 2006 he was awarded scholarships by the Fundación Carolina del Reino de España and the European Union's Fundación Euroamérica.


  • El Nuevo Convenio para Evitar la Doble Imposición entre España y Uruguay: un análisis de la fiscalidad internacional de las inversiones españolas en Latinoamérica, Thomson Reuters, 2011.
  • Ser o no ser: Uruguay y su camino a la OCDE, Universidad de Montevideo, 2013.
  • Articles on tax matters of current interest in "Consultor Tributario", a professional blog in


  • “Fiscal Friend: New tax treaty between Spain and Uruguay”, Latin Lawyer, December 2009.
  • “Willing to change:  Is Latin America ready for tax reforms needed to sustain economic growth?”,  Latin Lawyer, March 2009.
  • “Latin America up and running: Transfer pricing documentation”,  Latin Lawyer, June 2008.