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John H. Gadon

Special Counsel
Portland

John Gadon has more than 30 years of experience advising clients on complex state and federal tax matters and project financing. He regularly represents Fortune 100 companies in Oregon state and local tax appeals and litigation.

John also has substantial experience advising institutional tax-exempt organizations on tax, organizational, and charitable compliance matters and advising clients on tax-exempt bond financing and development-related tax incentives.

Experience 

Representative Matters

Federal Tax – Advise major multinational company on income tax treaty issues

Cases

Apple Inc. & U.S. Subs. v. Dept. of Rev.TC 5416 (Or Tax, 2024)
Partial summary judgment for Apple, receipts attributed to Apple Insurance Company excluded from Oregon sales

Vesta Corp. v. Dept. of Rev. – TC 5253 (Or Tax, 2018)
Income apportionment; application of cost-of-performance method to sourcing from transaction and payment processing services; case settled after partial summary judgment ruling on procedural issues

AT&T Corp. v. Dept. of Rev.357 Or 691, 358 P3d 973 (2015)
Income apportionment; application of cost-of-performance method to sourcing AT&T’s receipts from interstate and international telecommunications services

Professional Highlights

Professional Activities

American Bar Association, Taxation Section; State and Local Tax Committee; Executive Committee; Local Taxes Subcommittee, Task Force on State Tax Apportionment Dispute Mediation, 2015-2017; Exempt Organizations Committee

Oregon State Bar, Taxation Section, past Chair; Oregon Department of Revenue Liaison Committee

Recognition & Accomplishments

Life Fellow, American Bar Foundation

Best Lawyers, Portland "Lawyer of the Year," Litigation and Controversy – Tax, 2021

The Best Lawyers in America, Tax Litigation & Controversy, Tax Law, 2009–2025

Thomson Reuters, "Oregon Super Lawyer," Tax, 2010–2018

Speaking Engagements

“Top 10 Cases – Income Tax,” Council on State Taxation, October 26, 2022

Credentials 

Education

University of Washington (J.D., with honors)
Order of the Coif

Brown University (B.A.)

Languages

French

Admissions

Oregon

Washington

U.S. Tax Court

U.S. District Court for the District of Oregon

U.S. District Court for the Western District of Washington