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Robert Lee Mahon

Robert Lee Mahon

also known as Bob Mahon

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Practice Areas


  1. Business: 34%
    5 years
  2. Environmental and Natural Resources: 33%
    5 years
  3. Tax: 33%
    5 years

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Contact Info

Perkins Coie

1201 3rd Ave Suite 4800
Seattle, WA, 98101-3266



Professional Misconduct

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Avvo Contributions
Legal Answers
Award NameGrantorDate Granted
Rising Stars of Washington LawWashington Law & Politics MagazineN/A
Work Experience
TitleCompany NameDuration
PartnerPerkins Coie LLP1999 - Present
AssociateBogle & Gates PLLC1996 - 1999
Association NamePosition NameDuration
Washington State Bar Association, Taxation Law SectionPresident2008 - 2009
Washington State Bar Association, State and Local Tax SectionChair2004 - 2008
Washington State Bar AssociationMember1996 - Present
Legal Cases
Case NameOutcome
Group Health Cooperative v. City of Seattle, 189 P.3d 216 (Wash. Ct. App. 2008)Group Health entitled to $1 million plus refund.
HomeStreet, Inc. et al v. State of Washington Department of RevenueDecision for HomeStreet.
See all Legal Cases 
Publication NameTitleDate
WSBA Business Law Section NewsletterWashington Tax Issues Related to the Sale of a Business2002
ABA The State and Local Tax LawyerAlaska State Tax Developments2002
ABA Sales and Use Tax Desk BookWashington ChapterN/A
Committee on State Taxation State Tax DevelopmentsWashington and Alaska UpdatesN/A
Journal of MultiState Taxation and IncentivesU.S. Supreme Court UpdateN/A
School NameMajorDegreeGraduated
University of Washington School of LawN/ALL.M - Master of Laws1996
University of Iowa College of LawLawJD - Juris Doctor1995
Grinnell CollegeN/ABA - Bachelor of Arts1992
Speaking Engagements
Conference NameTitleDate
Washington State Bar Association, Business Law SectionWashington State Tax Issues & Developments2006
Attorney - CPA Tax ClinicThe Impact of Washington Taxes on Major Transactions2005
Washington State Bar Association, Business Law SectionWhat Business Lawyers Should Know About Washington State Taxes2003
Tax Executive InstituteWashington City B&O Tax Issues2003
Lorman Education ServicesCity of Seattle's Manufacturing Tax and Other Local Tax Developments2002
Washington State Bar Association, Business Law SectionWashington State Tax Issues and Developments2002
National Business InstituteWashington Business Tax2002
Washington State Bar Association, Continuing Legal EducationShould Your Client Incorporate? Representing the Entrepreneur- State & Local Tax MattersN/A