Discover the leading accounting firms in Washington selected by our team of industry experts. Find the best provider for your business based on cost, expertise, case studies, team size, company leadership and more.

Best Washington Accounting Company Rankings

7 Companies - Rankings updated: August 29, 2026

Each agency listed on DesignRush is assessed for industry expertise and customer testimonials are evaluated in order to provide you with a vetted selection. Certain listings represent paid partnerships.

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  • Clarity Tax Group

    Verified Verified by the DesignRush team for authenticity and credibility.

    Since 1976, Clarity Tax Group has helped individuals and businesses navigate tax, accounting, and advisory matters with confidence. We provide proactive tax planning, compliance support, bookkeeping, and financial guidance designed to bring clarity to complex financial decisions...

    Top Services:

    • Accounting
    Location
    Bellingham, Washington
    Number of Employees
    50 - 99
    Average Hourly Rate
    $50/hr
    Minimal Budget
    Under $1,000
    Portfolios Count
    1 Project Listed

    Clarity Tax Group Services

    • Accounting
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Cross-Border Taxpayers
    • Small Businesses
    • Professional Practices
    • Consultants
    • Real Estate Investors
    • Trusts & Estates
    • Family-Owned Businesses
    • High-Net-Worth Individuals
    Data sourced from the agency's DesignRush profile

    Clarity Tax Group Reviews & Testimonials

    • Lee Ellis
      Lee Ellis Review from Google
      5.0 ★

      Lee Ellis's Review Sourced from Google

      Clarity Tax has consistently remained professional, timely in every aspect of my tax filing, and extremely courteous over the years. I have no hesitation to highly recommend Clarity to anyone searching for a reputable and trustworthy Association.

    • Stephen Pecota
      Stephen Pecota Review from Google
      5.0 ★

      Stephen Pecota's Review Sourced from Google

      Clarity has been doing my taxes for several years now. They are very easy to work with. Always professional. Reliable. And when I need to be nagged, they do it in such a friendly way! I live in Seattle and have never been to their office, but the communication is always first rate. I highly recommend them.

    • Paula Hardman
      Paula Hardman Review from Google
      5.0 ★

      Paula Hardman's Review Sourced from Google

      This accounting business has been a pleasure to work with for a number of years. They helped me through the changes that took place when my husband died. Efficient, responsive and kind.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
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    4.7 4.7 (27)

  • DayCPA

    Verified Verified by the DesignRush team for authenticity and credibility.

    Exceptional Accounting, Extraordinary Services

    Since 1995, DayCPA has helped individuals, entrepreneurs, and businesses navigate tax, accounting, bookkeeping, and advisory needs. Our team delivers proactive tax planning, reliable compliance support, and practical financial guidance designed to support long-term success...

    Top Services:

    • Accounting
    Location
    Vancouver, Washington
    Number of Employees
    50 - 99
    Average Hourly Rate
    $50/hr
    Minimal Budget
    Under $1,000

    DayCPA Services

    • Accounting
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • International Taxpayers
    • Technology Companies
    • Startups
    • E-Commerce Businesses
    • Consultants
    • Small Businesses
    • Investors
    • Foreign Nationals Working in the U.S.
    Data sourced from the agency's DesignRush profile

    DayCPA Reviews & Testimonials

    • Milena Odrinskaya
      Milena Odrinskaya Review from Google
      5.0 ★

      Milena Odrinskaya's Review Sourced from Google

      I always had a great experience with this company and certainly recommend them. Responses are quick and accurate and service is professional.

    • María José Ruiz
      María José Ruiz Review from Google
      5.0 ★

      María José Ruiz's Review Sourced from Google

      I had a great experience here! I’ll use them again. My accountant was Sara & she was fantastic. Thank you to the whole team!

    • Hailey Salierno
      Hailey Salierno Review from Google
      5.0 ★

      Hailey Salierno's Review Sourced from Google

      I have used this company for a number of years on my tax filings, and they have always been very quick to reply and provide service. Now that I also have my own business I am very excited to also use them for my business strategic planning. We have already been working together on this and I am looking forward to what next year will bring. The people on my team that have been helping me is Sergei and Marina.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
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    4.4 4.4 (13)

  • Grant Thornton

    IT, Business, BPO, Audit, Tax and Advisory are just the beginning.

    Grant Thornton LLP (US) is an IT, project management, audit, tax, AgTech, and BPO company headquartered in Chicago, Illinois with over 50 U.S. offices and access to a global network or member firms in over 135 countries. We offer a broad range of services in strategy and consulting, operations, technology and...

    Top Services:

    • Accounting
    • Business Consulting
    • Market Research
    • HR Outsourcing
    • Software Development
    • Show more
    Location
    Bellevue, Washington
    Number of Employees
    1000 & Up
    Average Hourly Rate
    $35/hr
    Minimal Budget
    $1,000 - $10,000
    Portfolios Count
    2 Projects Listed

    Grant Thornton Services

    • Accounting
    • Business Consulting
    • Market Research
    • HR Outsourcing
    • Software Development
    • IT Services
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Financial industry
    • Real estate industry
    • Media and Entertainment industry
    Data sourced from the agency's DesignRush profile

    Grant Thornton Reviews & Testimonials

    • Theodore Mall
      Theodore Mall Review from Google
      4.0 ★

      Theodore Mall's Review Sourced from Google

      One of the world’s leading organizations of independent audit, tax and advisory firms. Grant Thornton has revenues in excess of $1.9 billion and operates more than 50 offices.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
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    4.5 4.5 (13)

  • Deloitte

    Collaborating for Lasting Impact in Business Consulting

    Join us at Deloitte, where we believe that our collective influence is the cornerstone of our value. With a rich legacy spanning over 175 years and a global network encompassing 150 countries, we empower remarkable achievements, solve complex problems, and drive meaningful progress for clients, professionals...

    Top Services:

    • Business Consulting
    • Accounting
    • HR Outsourcing
    • Big Data Analytics
    • CRM Consulting
    • Show more
    Location
    Seattle, Washington
    Number of Employees
    1000 & Up
    Portfolios Count
    6 Projects Listed

    Deloitte Services

    • Business Consulting
    • Accounting
    • HR Outsourcing
    • Big Data Analytics
    • CRM Consulting
    • Cybersecurity
    • AI Development
    • IT Services
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Financial industry
    • Government Sector
    • IT industry
    • Manufacturing industry
    • Telecommunications industry
    Data sourced from the agency's DesignRush profile

    Deloitte Reviews & Testimonials

    • InlineAdam
      InlineAdam Review from Google
      1.0 ★

      InlineAdam's Review Sourced from Google

      So sphiscated accounting systems I must say. For what? Never saw an irs payable in any return they asked me to prepare although I’m no licensed accountant. No names no whistle just a honest google review. Makes me wonder what an accountant does, cooking books or AICPA reporting them. No mark up in my basis. The roc building is beyond comprehension though, they even do SNL up or down stairs never got to see a show so I don’t know

    • ModernfoldStyles, Inc.
      ModernfoldStyles, Inc. Review from Google
      5.0 ★

      ModernfoldStyles, Inc.'s Review Sourced from Google

      We are proud to have been able to offer a beautiful Modernfold panel recovery job to give the walls a facelift to complete newly renovated meeting rooms at Deloitte in Rockefeller Plaza. Deloitte has always been such a great and dear client of ours! We look forward to continuing to work together in the future!

    • Alex Stackhouse
      Alex Stackhouse Review from Google
      1.0 ★

      Alex Stackhouse's Review Sourced from Google

      Deloitte completely failed implementation of Army IgnitEd, which led to thousands of service members paying out of pocket for education expenses. The circus that we watched unfold leaves me with zero confidence in the services that this firm provides.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
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    3.4 3.4 (83)

  • Withum

    Business & Technology Solutions

    Withum can be the new business advisor relationship you need to inspire innovation for your growth and success. Experience a fresh perspective on embracing what you’ve learned and refocusing your business strategy to thrive in an evolving, complex business environment. Whether you’re looking to strengthen...

    Top Services:

    • Accounting
    • HR Outsourcing
    • Cybersecurity
    • IT Services
    • Show more
    Location
    Seattle, Washington
    Number of Employees
    1000 & Up

    Withum Services

    • Accounting
    • HR Outsourcing
    • Cybersecurity
    • IT Services
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Finance Industry
    • Healthcare Industry
    • Legal Industry
    • Construction Industry
    • Consumer Goods Industry
    Data sourced from the agency's DesignRush profile

    Withum Reviews & Testimonials

    • Jerome Wong
      Jerome Wong Review from Google
      5.0 ★

      Jerome Wong's Review Sourced from Google

      We have had the pleasure of working with Withum for our annual audit engagements and have been impressed by the high standard of service provided. The audit team has demonstrated exceptional professionalism, with auditors who are clearly experienced, knowledgeable, and efficient throughout the entire process.

    • Jonathan Hunt
      Jonathan Hunt Review from Google
      5.0 ★

      Jonathan Hunt's Review Sourced from Google

      The Withum team has been very responsive and met all of their deadlines. They have demonstrated their knowledge and understanding of our industry which has been beneficial with some of our more complicated transactions. We have appreciated their communications throughout the engagement and the ease of being able to connect with the partner, manager, and other staff members.

    • John Gilmer
      John Gilmer Review from Google
      5.0 ★

      John Gilmer's Review Sourced from Google

      The entire Withum Team, Audit, Tax and M&A Services, is great. We have been with them back to the OUM days. They have always partnered well with our company as it has evolved and our organization and processes have matured. They are incredibly responsive, professional and tuned in to our specific business requirements.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
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    5.0 5.0 (8)

  • Protiviti

    Global Business Consulting Excellence

    Protiviti is a global consulting firm that offers deep expertise, objective insights, and tailored solutions to empower leaders in tackling future challenges. With a comprehensive range of services spanning finance, technology, operations, data, analytics, governance, risk, and internal audit, we serve...

    Top Services:

    • Business Consulting
    • IT Compliance Solution
    • Big Data Analytics
    • IT Services
    • Cybersecurity
    • Show more
    Location
    Seattle, Washington
    Number of Employees
    1000 & Up
    Portfolios Count
    5 Projects Listed

    Protiviti Services

    • Business Consulting
    • IT Compliance Solution
    • Big Data Analytics
    • IT Services
    • Cybersecurity
    • AI Development
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • KnowBe4
    • Resolver
    • PowerSchool
    Data sourced from the agency's DesignRush profile
    Visit Website View Profile
    5.0 5.0 (1)

  • EY

    Building A Better Working World

    EY offers Accounting, Business Consulting, and IT Services with a mission to build a better working world. It provides insights and quality services that instill trust in global capital markets and economies. EY focuses on developing exceptional leaders who deliver on their commitments to all stakeholders...

    Top Services:

    • Business Consulting
    • HR Outsourcing
    • Accounting
    • Cybersecurity
    • IT Services
    • Show more
    Location
    Seattle, Washington
    Number of Employees
    1000 & Up

    EY Services

    • Business Consulting
    • HR Outsourcing
    • Accounting
    • Cybersecurity
    • IT Services
    • AI Development
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Qiagen
    • Apple
    • ASOS
    • Microsoft
    • Wawa
    Data sourced from the agency's DesignRush profile
    Visit Website View Profile

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