Professional Biography
Image of Robert L. Mahon

Robert (Bob) L. Mahon Partner

Firmwide Chair, Tax Practice

  • Seattle

    D +1.206.359.6360

    F +1.206.359.9000

    Seattle

    1201 Third Avenue, Suite 4900

    Seattle, WA 98101-3099

    +1.206.359.6360

    RMahon@perkinscoie.com

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Overview

Experience

State & Local Tax

HomeStreet Inc. v. Washington Department of Revenue

Represented taxpayer in a successful business and occupation tax refund action. 166 Wash. 2d 444, 210 P.3d 297 (2009).

Group Health Cooperative v. City of Seattle

Represented taxpayer in a successful challenge to the application of city business and occupation tax to revenues that were preempted by state and federal law. 146 Wash. App. 80, 189 P.3d 216 (2008).

Community Telecable of Seattle Inc. v. City of Seattle

Represented amicus curiae in support of a successful challenge to the imposition of city utility tax on Internet service. 164 Wash. 2d 35, 186 P.3d 1032 (2008)

City of Seattle v. Visio Corporation

Represented taxpayer in successful administrative appeal of the city's assessment of business and occupation tax on software development activities; represented amicus curiae in opposition to the city's subsequent unsuccessful appeal. 108 Wash. App. 566, 31 P.3d 740 (2001)

Alaska Department of Revenue v. Magella Healthcare Corporation

Represented taxpayer in litigation to obtain alternative income tax apportionment under Alaska's version of Uniform Division of Income Tax Purposes Act (UDITPA) § 18.

Puget Sound Energy Inc. v. Oregon Department of Revenue

Represented taxpayer in litigating and ultimately settling an Oregon property tax dispute.

Tenaska Washington Partners, L.P. v. Washington Department of Revenue

Represented taxpayer in a successful challenge to a public utility tax assessment.

VeriSign Inc. v. Washington Department of Revenue

Represented taxpayer in litigating and ultimately settling a business and occupation tax refund related to the taxation of telecommunications services.

Fresh Express Inc. v. City of Bellevue

Represented taxpayer in litigating and settling a city business and occupation tax refund action.

American Honda Motor Company Inc., Chrysler Motors LLC, and Ford Motor Company v. City of Bremerton

Represented taxpayers in litigating and settling a constitutional challenge to the city's imposition of business and occupation tax on import sales.

Consolidated Food Management Inc. v. Washington Department of Revenue

Represented taxpayer in a successful challenge to retroactive changes in business and occupation tax reporting instructions.

Safeway Inc. v. Takko, et al.

Represented taxpayer in a successful appeal of county personal property tax valuations.

BP Oil Supply Company v. City of Tacoma

Represented taxpayer in a successful nexus challenge to the city's assessment of business and occupation tax.

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Bar and Court Admissions

  • Washington

Education

  • University of Washington School of Law, LL.M., Taxation, 1996
  • The University of Iowa College of Law, J.D., with high distinction, 1995
  • Grinnell College, B.A., with honors, 1992