Hire trusted accounting firms in London, Ontario to manage your finances. Use the search filter to compare their client reviews, average rates, team size and budget to find your partner agency in just a few clicks.

Best London, Ontario Accounting Company Rankings

8 Companies - Rankings updated: August 17, 2026

Each agency undergoes DesignRush evaluation for professional expertise and genuine client satisfaction to assist your search. Some featured placements are paid.

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  • Dimov Tax

    Verified Verified by the DesignRush team for authenticity and credibility.

    Let us save you time & money.

    Dimov Tax offers expert domestic and international tax and financial services, including individual and business tax preparation, cryptocurrency and stock taxation, IRS/state notice resolution, forensic accounting, M&A consulting, property management accounting, CPA letters, and tailored strategies...

    Top Services:

    • Business Consulting
    • Accounting
    Location
    London Ontario, Canada
    Number of Employees
    Under 49
    Portfolios Count
    4 Projects Listed

    Dimov Tax Services

    • Business Consulting
    • Accounting
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • High-Net-Worth Individuals
    • Startups
    • Technology Companies
    • International Taxpayers
    • Real Estate Investors
    • Professional Athletes & Entertainers
    • Healthcare Practices
    • Multi-State Businesses
    • Nonprofit Organization
    Data sourced from the agency's DesignRush profile

    Dimov Tax Reviews & Testimonials

    • Dmitrii Legetskii
      Dmitrii Legetskii Co-owner at VLA&DI Group
      5.0 ★

      Accounting Review from Dmitrii Legetskii

      This company helped us set up our accounting system from beginning to end. I am a serial entrepreneur with experience working with many different accounting groups and this one has been the most responsive overall. They have helped us with registering the business, putting together payroll, and getting our quarterly tax returns filed. They have been also very helpful with giving personal tax advice. I would recommend them to any other friends and especially other business owners.

    • Setty McIntosh
      Setty McIntosh Producer Creative Director at Media Production Company
      4.2 ★

      Accounting Review from Setty McIntosh

      Services 2 years in a row. George Dimov is now my C.P.A. Excellent, organized, thorough and timely. We were impressed with their patience, courteousness, and efficiency.

    • Undisclosed
      Undisclosed Executive at Tax Services Company
      5.0 ★

      Accounting Review from Undisclosed

      They were easy to deal with. George Dimov, CPA successfully delivered the project as per the client's requirements. The service provider utilized Email and messaging apps for effective responsiveness and communication. They were also easy to work with. Ultimately, the client was satisfied with the partnership.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
    Visit Website View Profile
    4.8 4.8 (9)
    4.5 4.5 (72)

  • Grant Thornton

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

    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
    London Ontario, Canada
    Number of Employees
    1000 & Up
    Average Hourly Rate
    $35/hr
    Minimal Budget
    $1,000 - $10,000
    Portfolios Count
    2 Projects Listed
    View Profile
    4.5 4.5 (13)

  • Deloitte

    Collaborating for Lasting Impact in Business Consulting

    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
    London Ontario, Canada
    Number of Employees
    1000 & Up
    Portfolios Count
    6 Projects Listed
    View Profile
    3.4 3.4 (83)

  • Protiviti

    Global Business Consulting Excellence

    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
    London Ontario, Canada
    Number of Employees
    1000 & Up
    Portfolios Count
    5 Projects Listed
    View Profile
    5.0 5.0 (1)

  • EY

    Building A Better Working World

    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
    London Ontario, Canada
    Number of Employees
    1000 & Up
    View Profile

  • KPMG

    Together, we achieve more.

    Together, we achieve more.

    Offering project management, business, and IT services. At KPMG LLP, their purpose is to turn knowledge into value for the benefit of their clients, people, and the capital markets...

    Top Services:

    • Business Consulting
    • Market Research
    • Accounting
    • HR Outsourcing
    • IT Services
    • Show more
    Location
    London Ontario, Canada
    Number of Employees
    1000 & Up
    View Profile
    4.3 4.3 (56)

  • PwC

    Building trust in society and solving important problems.

    Building trust in society and solving important problems.

    We’re a network of firms in 155 countries with over 284,000 people who are committed to delivering quality in BPO, project management, assurance, advisory, IT, and tax services...

    Top Services:

    • Market Research
    • BPO
    • HR Outsourcing
    • Accounting
    • Business Consulting
    • Show more
    Location
    London Ontario, Canada
    Number of Employees
    1000 & Up
    View Profile
    4.6 4.6 (74)

  • ZOO Media Group

    Venturing Successfully into the Business and Brand World

    Venturing Successfully into the Business and Brand World

    For over a decade, ZOO Media Group has been turning heads with finely crafted branding and marketing strategies. Our deft touch takes businesses of every size and profile on an unforgettable journey to draw in their clients - all powered by our cutting-edge digital creativity! Through expert advice, skilled...

    Top Services:

    • PPC
    • Digital Marketing
    • Advertising
    • SEO
    • Branding
    • Show more
    Location
    London Ontario, Canada
    Number of Employees
    Under 49
    Average Hourly Rate
    $149/hr
    Minimal Budget
    $1,000 - $10,000
    View Profile
    5.0 5.0 (79)

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