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Top Accounting Firms in Ontario

18 of 77 accounting firms ranked on evidence in the Q4 2026 edition.

Between them, the 77 accounting firms on this page cover tax (45), accounting (43), government (14) and reporting (9). They also list work in Toronto, London, Hamilton and New York. 77 of them have written a profile you can read before you get in touch.

TrustList ranking

Q4 2026 edition

18 of 77 accounting firms ranked on evidence held on 5 October 2026: client reviews, vetting, awards and facts each business states on its own website, which we read and date. Nobody pays to be placed.

Positions are fixed for the quarter; the next edition is due in January 2027.

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  1. Also listed, not yet ranked. We hold nothing checkable on these yet that ranks them here: no client review, vetting, award, expert review, or fact stated on their own website (and on a place ranking, where they are based). They follow in order of their TrustList Score. How TrustList ranks · Get vetted, free
  2. Don Valley Accounting logo

    Tax · Accounting · Medical · Also in Toronto

    Don Valley Accounting is a firm of chartered accountants in Toronto, Ontario.

    On record: Based in Toronto, Ontario, Canada

  3. Dosanjh, CPA Professional Corporation logo

    Tax · Accounting · Corporation · Also in London

    Windsor, Ontario chartered accountants offering tax, bookkeeping, payroll and incorporation help to companies and individuals

    On record: Based in Windsor, Ontario, Canada

  4. Double J's Tax logo

    Tax · Government · Also in Ottawa and Hamilton

    Double J's Tax prepares personal and corporate tax returns from its office on Hamilton Mountain in Ontario, Canada. Payroll and general accounting sit alongside the tax work.

    On record: Based in Hamilton Mountain, Ontario, Canada

  5. Edelkoort | Smethurst | Schein Chartered Professional Accountants LLP logo

    Chartered accounting firm in Burlington, Ontario, providing tax, assurance and bookkeeping for individuals and businesses

    On record: Based in Burlington, Ontario, Canada · Local practice

  6. Farrukh Ahmed, CPA logo

    Tax · Accounting · Also in Mississauga

    Farrukh Ahmed, CPA is an accounting and tax firm based in Mississauga, Ontario, serving individuals and small to medium-sized businesses across the Greater Toronto Area.

    On record: Based in Mississauga, Ontario, Canada

  7. FT

    Tax Planning · Tax · Accounting · Also in Alberta and Mississauga

    Filing Taxes is an accounting firm serving people and businesses in Toronto, Mississauga and the wider Greater Toronto Area.

    On record: Address in Ontario · Owner-managed

  8. Focus HGK logo

    Accounting · Responsive · Monitoring

    Focus HGK works only with other accounting firms, helping them meet professional standards without excess cost.

    On record: Based in Toronto, Ontario, Canada

  9. Frank Weyer, CPA logo

    Accounting · Also in Canada

    Frank Weyer, CPA is an accounting practice that has entered an agreement with Wilkinson & Company LLP.

    On record: Based in Quinte West, Ontario, Canada

  10. Fuller Financial Solutions logo

    Tax · simple · Also in Toronto

    Fuller Financial Solutions is a licensed bankruptcy trustee firm with offices across Toronto, Hamilton and southern Ontario.

    On record: Based in Toronto, Hamilton and southern Ontario, Canada

  11. Garber Urback Chartered Professional Accountants logo

    Accounting · Responsive · Internet

    Garber Urback Chartered Professional Accountants is a two-partner accounting firm in North York, serving clients across the Greater Toronto Area.

    On record: Based in North York, Ontario, Canada

  12. Garneau Group logo

    Goals · Personnel · Also in Durham

    Canadian holding company whose businesses cover nuclear staffing, outsourced payroll, contractor management and childcare

    On record: Based in Ontario, Canada, with offices in Kincardine and Whitby

  13. Gary S. Aslett Professional Corporation logo

    Tax Filing · Tax · Accounting

    Gary S. Aslett Professional Corporation is an accounting practice working under Ontario and Canadian tax rules.

    On record: Based in Ontario, Canada

  14. Goodman Mintz, LLP logo

    Tax · Accounting · Government · Also in Quebec

    Goodman Mintz, LLP is a firm of chartered professional accountants in Toronto, Ontario.

    On record: Based in Toronto, Ontario, Canada

  15. Gram Tax & Accounting logo

    Tax · Accounting · Cloud · Also in Toronto

    Gram Tax & Accounting is an accounting practice serving Canadian small businesses, led by its founder Rukie Liyanage, who holds CPA and CA designations.

    On record: Based in Toronto, Ontario, Canada · Sole proprietor

  16. Heisz Financial logo

    Tax · Property · Insurance

    Heisz Financial is a tax and financial planning practice run by Philip Heisz, serving Perth County, Bruce County and London in Ontario, Canada.

    On record: Based in Perth and Bruce County area, Ontario, Canada

  17. Hendry Warren LLP logo

    Tax · Accounting · Responsive · Also in Lincoln

    Hendry Warren LLP is a firm of chartered professional accountants based in Ottawa, Ontario.

    On record: Based in Ottawa, Ontario

  18. Hogg, Shain & Scheck logo

    Not for Profit · Tax · Accounting

    Hogg, Shain & Scheck is a boutique accounting practice in the Greater Toronto Area. It has worked for more than 43 years and serves clients across southern Ontario.

    On record: Based in Greater Toronto Area, Ontario, Canada · Boutique

  19. IndEco Strategic Consulting logo

    Toronto management consultancy on sustainability, energy and environment for municipalities, utilities and other organisations

    On record: Based in Toronto, Ontario, Canada

  20. IJ

    Tax · Accounting · Government · Also in Undisclosed

    Ish Jindal CPA Professional Corporation is an accounting and tax practice serving Woodbridge, Vaughan and Markham in Ontario.

    On record: Based in Woodbridge, Ontario, Canada

  21. iTax Canada logo

    Tax · Accounting · Government · Also in Canada

    iTax Canada is an accounting and tax practice serving the Thorncliffe area of Toronto, Ontario.

    On record: Based in Thorncliffe, Toronto, Ontario, Canada

  22. JKtax logo

    Tax · Accounting · Government

    JKtax is a tax practice based in Toronto and Markham that describes itself as unlike a conventional accounting firm.

    On record: Based in Markham and Toronto, Ontario

  23. Jones & O’Connell LLP logo

    Tax · Accounting · Insurance

    Chartered professional accountants in St. Catharines, Ontario providing audit, tax and consulting across the Niagara Region

    On record: Based in St. Catharines, Ontario, Canada

  24. Just Ask Sam logo

    Just Ask Sam is an accounting practice in Collingwood, Ontario, run by a QuickBooks Online Advanced Certified expert.

    On record: Based in Collingwood, Ontario, Canada

  25. KP

    Tax · Accounting · Government · Also in California and Florida

    Kamal Professional Corporation is an accounting practice in Scarborough, Toronto.

    On record: Based in Scarborough, Toronto, Ontario, Canada

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