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About me


Recognized by Seattle magazine as a Top Lawyer (tax law), Seattle Business Monthly magazine as a Best Business Lawyer (tax law), Washington Law & Politics magazine as a Rising Star, and Super Lawyers magazine and Seattle Met magazine as a Top Lawyer, my practice is focused primarily upon general business and corporation law with a heavy emphasis on federal and state taxes.  I enjoy working with closely-held and family businesses of all sizes and at different stages of their development through the transition to family members or third parties.  Working closely with my client’s financial and other professional advisors, I help strategize for growth and identify solutions that address the client’s legal, tax, and operational issues.  I am authorized to represent clients before the Internal Revenue Service and the Washington Department of Revenue.


Photos and videos

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Practice areas


  1. Corporate: 60%
  2. Tax: 20%
  3. Estate Planning: 20%


Payment types:

Cash, Check, Credit card

Attorney endorsements

2 total 

Are you an attorney? Endorse this lawyer

  • Karen L Gilbert

    As an immigration lawyer and colleague, I have collaborated successfully with Karl Weiss on immigration petitions for business clients with complex corporate and tax structures. Karl’s advanced education and experience allows him to serve as an expert affiant in successful filings with government agencies.


    Karen Gilbert Immigration Attorney
    Relationship: Worked together on matter

  • Rodger Ian Kohn

    I worked with Karl on a transaction in which he represented a business owner selling the business to two key employees (I represented the employees purchasing the business). Karl did a great job keeping the transaction on track and preparing documents that were fair and reasonable for all parties. I know that my clients had a high comfort level with Karl and felt that the deal went well.


    Rodger Kohn Business Attorney
    Relationship: Opposing Counsel on matter

Contact info

601 Union St Ste 2600
Seattle, WA, 98101-4000


We have not found any instances of professional misconduct for this lawyer.
Avvo contributions
Legal answers
Award nameGrantorDate granted
Super LawyerWashington Law & Politics Magazine2015
Super LawyerWashington Law & Politics Magazine2014
Super LawyerWashington Law & Politics Magazine2013
Super LawyerWashington Law & Politics Magazine2012
Martindale-Hubbell/Fortune Magazine Top Ranked Law FirmMartindale-Hubbell2011
Super LawyerWashington Law & Politics Magazine2011
Top LawyerSeattle Met Magazine2011
Super LawyerWashington Law & Politics Magazine2010
VIPCambridge Who's Who2009
Rising StarWashington Law & Politics Magazine2009
Rising StarWashington Law & Politics Magazine2008
Top Business LawyerSeattle Business Monthly Magazine2007
Top LawyerSeattle Magazine2007
Work experience
TitleCompany nameDuration
ManagerErnst & Young LLP1999 - 2003
Association namePosition nameDuration
Northwest Entrepreneur Network, Seminar CommitteeN/AN/A
Pacific Science Center, Annual Corporate FundraiserN/AN/A
Bellevue International School PTSA, Co-TreasurerN/AN/A
United States Tax CourtMemberN/A
Washington State Bar Association, Taxation Law SectionMemberN/A
United States Masters SwimmingN/AN/A
Legal cases
Case nameOutcome
IRS Appeal - Anonymous ClientAbatement by Internal Revenue Service of over $63,000 in failure to file penalties.
See all legal cases 
Publication nameTitleDate
Washington Bar Association publicationContribuitng Author, Washington Partnership and Limited Liability Company Deskbook2010
School nameMajorDegreeGraduated
New York University School of LawTaxLL.M - Master of LawsN/A
University of WisconsinBehavioral Science & LawBA - Bachelor of ArtsN/A
Willamette University College of LawN/AJD - Juris DoctorN/A
Speaking engagements
Conference nameTitleDate
King County Bar AssociationAdvising Small Businesses (Tax Primer)2012
Vistage International All-City EventExecuting out of the Rebound2011
King County Bar AssociationExit (Growth) Strategy - Selling (Buying) the Business2011
Drafting LLC Agreements: Essential SkillsDrafting the LLC Agreement2011
National Business InstituteForming and Converting to LLCs2010
Northwest Entrepreneur NetworkTo LLC or Not to LLC2006
Northwest Entrepreneur NetworkTo LLC or Not to LLC2004