Kevin E. Thorn

Managing Partner


Kevin E. Thorn is the Managing Member of the Thorn Law Group.

Mr. Thorn’s expertise is highly sought after across the country and around the globe in all stages of civil and criminal tax controversies including, international tax law, IRS voluntary disclosures, offshore bank accounts and foreign asset disclosures, civil examinations, criminal investigations, IRS administrative appeals, collection alternatives, ethics investigations, IRS tax audits, IRS conservation easements, cryptocurrency disclosures and other types of complex civil litigation.

His broad range of clients include high net individuals, individuals, tax professionals, partnerships, trusts, banks, closely-held businesses, accounting firms, law firms, and corporations. He is highly skilled, intellectually bright, and respected by professionals across the Nation. Mr. Thorn is one of the “Go-To” tax attorneys in Washington, DC for complicated tax issues when high profile individuals or big-name companies need important legal issues resolved.

Mr. Thorn represents taxpayers in all types of federal and state civil and criminal tax controversy and litigation matters. He has advocated on behalf of his clients before the Internal Revenue Service, the Department of Justice, the United States Tax Court, the Internal Revenue Service’s Office of Professional Responsibility, the Internal Revenue Service’s Whistleblower Office, and DC, Virginia, Maryland and other state taxing authorities.

Superior Experience

Mr. Thorn uses the knowledge and experience he developed over many years of working within the Internal Revenue Service as an Attorney and with the United States Tax Court. Many tax attorneys without government experience refer client’s to Mr. Thorn for his unique perspective when representing them in IRS audits and criminal examinations, IRS voluntary disclosures, administrative appeals and protests of IRS determinations, Department of Justice investigations, and litigation of tax and tax-related cases in U.S. district and appellate courts, the U.S. Court of Federal Claims, and the U.S. Tax Court.

His perspective also brings benefits to clients considering estate planning, wealth management, asset protection and business planning transactions. Additionally, Mr. Thorn is highly sought after to represent attorneys, CPAs and other tax professionals in professional ethics audits before the IRS Office of Professional Responsibility, IRS Whistleblower Office and state licensing boards.

With an office strategically located in Washington, DC, the center for all federal government, tax-related agencies and federal courts, Mr. Thorn capitalizes on this accessibility and close proximity to the headquarters of the Internal Revenue Service, Department of Justice, United States Tax Court, IRS Whistleblower Office, the IRS’s Office of Professional Responsibility to effectively advocate the most advantageous resolution of his clients’ tax and litigation issues.

Professional Activities & Memberships

Mr. Thorn is a regular speaker and instructor at many professional organizations. He has spoken with and advised banks in Europe, as well as, financial service providers in the Caribbean and other parts of the world regarding FATCA and U.S. information reporting requirements. Mr. Thorn has also spoken on several tax law and government procedure matters to such professional organizations as the American Bar Association’s Section of Taxation, the Federal Bar Association, state bar associations, and several academic and regional conferences. While serving as an attorney for the IRS, Mr. Thorn was a regular instructor at many IRS professional development conferences across the country.

Mr. Thorn is a member of:

Prior Professional Experience

  • Partner and the Chair of the Tax Controversy Practice of a major Southeastern law firm
  • Judicial Law Clerk to the Honorable Laurence J. Whalen of the United States Tax Court
  • IRS Attorney and Acting Chief of Enforcement for IRS Office of Professional Responsibility


Bar Admissions

  • District of Columbia
  • New Jersey

To learn more about how a Washington, DC tax attorney from the Thorn Law Group can help you with your tax and legal issues, contact Kevin E. Thorn, Managing Partner, at, or (202) 349-4033.

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