Colin has practiced public accounting since 2013, with a cross-industry focus on state and local tax (SALT) and credits and incentives consulting services.

Colin has broad experience across SALT, including both direct and indirect taxes. He has helped clients determine state tax exposure through nexus, apportionment, taxability, and modeling studies. He has drafted complex letter ruling requests and technical memoranda, and assisted in administrative controversy matters. Colin regularly consults on the Oregon Corporate Activity Tax and local Portland metropolitan area taxes.

Colin advises clients on federal and state zone, hiring, and investment-based business incentives, including possible tax credit monetization opportunities.

Selected Speaking Engagements

  • State & Local Tax Update: Oregon CAT and New Local Taxes
    (Oregon Society of CPA Construction Industry Conference, May 2021)
  • 2020 State and Local Tax Update
    (Construction Finance Management Association, Portland Chapter, November 2020))
  • The Corporate Activity Tax: What to Expect and How to Prepare
    (Oregon Society of CPA Construction Industry Conference, May 2020)
  • Oregon’s Corporate Activity Tax
    (Southern Oregon Regional Economic Development Inc. Southern Oregon Business Conference, January 2020)
  • The New Oregon Corporate Activity Tax: What Your Company Needs to Know to Prepare
    (Moss Adams Eugene and Portland Building Opportunity Conferences, October and November 2019)
  • Oregon State and Local Tax Update
    (Eugene Springfield Tax Association Meeting, October 2018)
  • What Is State Tax Nexus and How Does the Supreme Court’s Wayfair Decision Change Things?
    (Southern Oregon Regional Economic Development Inc. Manufacturing Conference, October 2018)

Professional Affiliations

  • Member, Oregon State Bar


  • BA, japanese, University of Washington
  • BA, communication, University of Washington
  • JD, Willamette University
  • LLM, taxation, University of Washington

Insights from Colin Quill