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S. Mark Barnes

Tax Attorney at Salt Lake City, UT

Not yet reviewed

also known as Expert Tax Law

Virtual consultation available
Virtual consultation available
  • State Years
    Utah - UT 36 years
    Dist. of Columbia - DC 30 years
  • Licensed for 36 years
    State UT
    Acquired 1987
    Active No misconduct found
  • Licensed for 30 years
    State DC
    Acquired 1993
    Administratively Suspended - Non-Payment of Dues No misconduct found

We have not found any instances of professional misconduct for this lawyer.

About S. Mark

Learn S. Mark’s areas of practice.

Practice areas
  1. Tax
    Federal Tax and State Tax controversy and litigation. Areas include Corporate Tax, Tax Litigation, IRS and State Tax Audits, International Tax, Federal and State Tax, Estate and Gift Tax, Income Tax, Property Tax and Tax Planning.

    37 years, 1,000 cases

  2. Tax fraud and tax evasion
    Criminal Tax (federal and state). We represent clients in criminal tax investigations and criminal tax trials for both federal and state tax cases.

    37 years, 50 cases

  3. Corporate and incorporation
    Business Formation. We can help you create business entities like corporations, limited liability companies, partnerships, etc. In addition, we can help you set up nonprofits and take care of both state and IRS regulatory requirements.

    11 years, 15 cases

  4. Employment and labor
    Department of Labor, Wage and Hour Division Audits. We represent clients facing investigation by the Department of Labor Wage and Hour Division.

    2 years, 1 case

S. Mark Barnes has more than 35 years of tax controversy experience. He graduated for the University of Utah College on law in 1987, and spent 30 years as a trial attorney for the Internal Revenue Service. He left the Service in 2017, and has represented clients in private practice since that time. He currently practices for the firm Expert Tax Law. While representing the IRS he spent decades litigating before the the United States Tax Court and the United States Bankruptcy Court. During his 30 years with the government, he represented the service in both small and large cases. He served on several large litigation teams, including some of the largest litigation projects undertaken by the government. Mark also developed expertise in international tax and expertise in large valuation cases. He was known for his expertise in cases that required expert witnesses and dealt with sophisticated financial instruments and complex valuations. After leaving the government, his litigation experience covers both small and large tax cases, including international tax, financial products and valuation related issues. His tax practice includes both civil and criminal cases, at both the federal and state levels.

Mark strongly believe that in any significant tax controversy case, you need a tax litigator. In his thirty years with the IRS, agents and IRS attorneys were very aware of which tax representative could litigate, and which representatives would eventually be forced to cave. When push comes to shove, too many representative are simply forced to concede, because they do not have the credentials or the ability to litigate the case. If you want your case taken seriously, hire one of the few tax attorneys in Utah capable of trying a case. In most cases, the goal is not to litigate, but to reach a favorable settlement. However, you are much more likely to obtain a favorable settlement if the IRS or the State Tax Commission take your representative seriously.


S. Mark Barnes
2843 S 2540 E
Salt Lake City, UT, 84109-1864
Expert Tax Law
2843 S 2540 E
Salt Lake City, UT, 84109-1864
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AVVO RATING 7.4 (Very Good)

Work Experience

  • Attorney/Owner
  • Expert Tax Law
  • 2022 - Present
  • Tax Attorney
  • Michelle Turpin PC
  • 2017 - 2022
  • Senior Trial Attorney
  • Office of Chief Counsel, IRS
  • 1987 - 2017


  • University of Utah S.J. Quinney College of Law
  • JD - Juris Doctor
  • 1987
  • The University of Tokyo
  • 1986

Languages Spoken

  • Japanese
  • English

Honors and Awards

  • Thirty Years of Service
  • Office of Chief Counsel, IRS
  • 2017

Speaking Engagements

  • Estate and Gift Tax
  • 2023

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Salt Lake City Tax Lawyer S. Mark Barnes
S. Mark Barnes
Tax Attorney
Salt Lake City, UT
Licensed for 36 years
Virtual consultation available