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Isis Carballo

McConnell Valdés

2026_ITR World Tax Highly Regarded Practitioner.png
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Position: Capital Member and Chair, Tax Practice Group
Rating:
  • Highly Regarded
  • Women in Tax Leader
Practice Areas:
General corporate tax
Jurisdictions:
Languages:
English
Spanish
Biography

She focuses her practice on complex corporate tax matters, including startup operations, inbound and outbound corporate reorganizations, acquisitions, financings, exit strategies, legislative affairs, tax incentives and exemptions, and competent authority proceedings between the Puerto Rico Treasury Department and the Internal Revenue Service.

A substantial part of her practice is devoted to tax minimization strategies through Puerto Rico's various tax incentive programs under Act 60-2019 including export services, resident individual investors, industrial/manufacturing, and agriculture tax exemptions, as well as municipal incentives.

Many of her clients are global manufacturing companies in the pharmaceutical, medical devices and electronics sectors, as well as major retail companies, e-commerce companies, companies engaged in blockchain and cryptocurrency transactions, export service companies, and high net worth individuals.

She has spearheaded various amendments to Puerto Rico’s Internal Revenue Code, the industrial tax incentives acts of 1998 and 2008, as well as the Puerto Rico Incentives Code of 2019.

Key practice areas
Corporate tax matters:
  • Corporate taxes
  • Cryptocurrency
  • Financial services
  • M&A
  • Restructuring
  • Technology
  • Transactions
Indirect tax:
  • Customs
  • Supply chains
  • VAT
Tax advisory:
  • International tax advisory
  • Tax consulting
  • US inbound
  • US outbound
Transfer pricing:
  • Business restructuring
  • Cross-border project management
  • International tax planning
Sector expertise
  • Government and public policy
  • Healthcare
  • Industrials
  • Pharmaceutical and life sciences
  • Technology and telecommunications
  • Other
Academic qualifications
  • J.D., Columbia Law School
Association memberships
  • American Bar Association, Tax Section
  • Hispanic National Bar Association
  • Columbia University Alumni Association of Puerto Rico
Bar admissions
  • Commonwealth of Puerto Rico
  • U.S. Court of Appeals First Circuit
Address:
270 Muñoz Rivera Avenue, San Juan
Puerto Rico, 00918
Tel:+17877599292 Email:Contact this practitioner Website:http://mcvpr.com