Jon B. Nelsen

Partner Tax


Jon Nelsen is a partner in the Austin office of Kirkland & Ellis LLP. Jon focuses on federal income tax matters. His practice includes representing large companies and high net worth individuals in tax controversy matters nationwide and planning and effecting joint ventures, mergers, acquisitions, and reorganizations.

Jon’s controversy experience includes representing clients in IRS examinations, appeals, fast track mediations, post-Appeals mediation, and pre-filing agreement negotiations. These matters relate to numerous areas of federal income taxation, including financial products issues, debt vs. equity issues, depreciation issues, research and development credit issues, casualty loss issues, section 1033 issues, and normalization issues. Jon also has extensive experience advising clients with respect to FIN 48 issues, Schedule UTP, working with outside auditors, and financial disclosure issues.

Jon’s extensive tax planning practice includes advising on complex joint venture arrangements for real estate and energy clients and mergers and acquisitions involving a broad range of tax issues, including qualification for reorganization treatment and planning for post-acquisition matters.



“Rising Star,” Texas Super Lawyer (Thomson Reuters), 2013–2020

Memberships & Affiliations

Austin Bar Association

Houston Bar Association


Admissions & Qualifications

  • Texas


  • United States District Court for the Southern District of Texas


  • University of Texas at Austin School of LawJ.D.with Highest Honors2006

    Order of the Coif


    Associate Editor, Texas Law Review

  • University of Colorado at BoulderB.A., Political Science & History2002
    Phi Beta Kappa