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About me

Attorney Philip G. Panitz is a national tax litigator who has successfully fought the IRS on behalf of real estate investors and other clients. He has handled over 250 tax matters before the U.S. Tax Court. In 1995 he successfully challenged the IRS in the matter "Williams v. U.S." before the U.S. Supreme Court. Mr. Panitz holds an LL.M. in Tax from NYU, and conducts his tax litigation practice nationwide. He is a Certified Tax Specialist in accordance with the State Bar of California, Board of Legal Specialization, with 30 years of legal experience in tax litigation and tax planning.


Practice areas


  1. Tax: 80%
    35 years, 250 cases
  2. Corporate: 20%
    35 years

Attorney endorsements

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  • Paul Bradley Tyler

    If it is a tax issue you are dealing with I can almost guarantee you that Phil knows the answer. I highly recommend him for anyone dealing with tax related issues.


    Paul Tyler Criminal defense Attorney
    Relationship: Fellow lawyer in community

Contact info

Panitz & Kossoff, LLP

5743 Corsa Avenue
Suite 208
Westlake Village, CA, 91362


NYCurrently registered 198907/10/2016
We have not found any instances of professional misconduct for this lawyer.
Avvo contributions
Legal answers
Association namePosition nameDuration
New York State Bar AssociationMemberN/A
State Bar of CaliforniaMemberN/A
Ventura County Bar AssociationPresident2004 - 2004
Legal cases
Case nameOutcome
Williams vs. United StatesThe U.S. Supreme Court decision rendered in 1995 in favor of Ms. Williams and sustaining the opinion of the Ninth Circuit changed the tax law in the United States.
See all legal cases 
Publication nameTitleDate
Vineyard & Winery ManagementDelayed Deductions2011
California FarmerFarming for Profit - Not for Hobby2010
Journal of AccountancyExecutive Compensation: What's Reasonable?2009
Accounting TodayThe IRS War Against Real Estate Investors2009
Wall Street JournalReal Estate Professionals Say IRS Snares Them by Mistake2007
School nameMajorDegreeGraduated
New York University School of LawTaxationLL.M - Master of Laws1989
Loyola Law School, Loyola Marymount UniversityLawJD - Juris Doctor1980
Arizona State UniversityAccountingB.S.1977
Speaking engagements
Conference nameTitleDate
SeminarIRS Audit Sweep on Real Estate Investors2011
Southern Nevada Enrolled Agent Chapter SeminarExecutive Compensation & The IRS Assault on Real Estate Investors2010