Thomas M. Regan

Tom dedicates his practice to resolving tax controversies for individuals and businesses. During the past thirty-five years, he has assisted thousands in federal and state actions. He has received both an AV rating  from Martindale Hubbell for more than 25 years and been designated a Superlawyer  since 1997. He is a frequent lecturer on a variety of tax controversy topics for state and local legal seminars as well as private law firms and accounting firms. His experience extends from audits, administrative appeals, and collection matters through litigating tax issues in the United States Tax Court, United States Federal District Court, United States Court of Federal Claims, Minnesota Supreme Court, Minnesota Court of Appeals, and the Minnesota Tax Court.


phone: 952-855-8210  |  fax:  952-855-8214  | email:  |  vCard  |  LinkedIn


  • Received AV (Highest) Rating, Martindale-Hubbell Law Directory
  • Named a SuperLawyer, Minnesota Law and Politics, Taxation (1997-Present)
  • Received Distinguished Service Award 2011, Tax Section, Minnesota State Bar Association
  • Named a Leading Minnesota Attorney, American Research Corporation, Taxation
  • Named a Top Minnesota Tax Attorney, Minneapolis St. Paul Magazine, Twin Cities Business Monthly
  • Named one of the Top 40 Business & Commercial Transaction Attorneys, Minnesota Law & Politics
  • Named Minnesota Small Business Advocate of the Year, U.S. Small Business Administration
  • Hennepin County Bar Association (Tax Section) Member
  • Minnesota State Bar Association (Past Chair, Tax Section) Member


  • Tax Controversies – Complete Lawyer Handbook Minnesota CLE (2016)
  • Freedom of Information Act (FOIA) and Government Data Practices Act (GDPA) Issues – 61st Annual MNCPA Tax Conference (2015)
  • Tax Controversies – Complete Lawyer Handbook Minnesota CLE (2015)
  • Ethics: A Discussion with OPR – 74th Annual Tax Institute, Minnesota CLE (2014)
  • Residency – 73rd Annual Tax Institute, Minnesota CLE (2013)
  • The IRS Audit – Closely Held Business Conference , Minnesota CLE (October 2013)
  • The IRS Audit – Closely Held Business Conference , Minnesota CLE (January 2013)
  • Independent Contractors – 72nd Annual Tax Institute, Minnesota CLE (2012)
  • What To Do When Taxes Are Part Of The Marital Estate? Hennepin County Bar Association (2012)
  • Tax Controversies – Complete Lawyer Handbook Minnesota CLE (2012)
  • When the Government Comes Knocking – What to Do Before, During, and After a Government Audit? Independent Contractors, Minnesota CLE, (2011)
  • Tax Ramifications of Litigation. Minnesota CLE, Litigators’ Short Course (2011)



  • U.S. Court of Appeals for the Eighth Circuit
  • U.S. Court of Appeals for the Federal Circuit
  • U.S. Court of Federal Claims
  • U.S. District Court for Minnesota
  • U.S. District Court for Western District of Wisconsin
  • U.S. Tax Court
  • Minnesota Supreme Court
  • Minnesota Court of Appeals
  • Minnesota Tax Court


  • J.D. 1981 Creighton University School of Law (Law Review, Author and Editor, 1980 & 1981)
  • B.A. 1978 Creighton University


  • Pro Bono Actions for Individuals in Need


How Long Do I Need To Keep My Tax Records?

I am often asked how long do I have to maintain records to protect myself against actions by the Internal Revenue Service? Along with that question comes the question about whether the IRS has the burden of proving a taxpayer owes the tax (assuming it met its burden...

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