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Top Accounting Firms in Ontario

30 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

30 of 77 accounting firms ranked on evidence held on 12 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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All accounting firms 30 ranked SMEs 29 ranked

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Concise Tax Service Inc.
Tax · Government · Also in London
Individuals and small businesses in London, Ontario, turn to Concise Tax Service Inc.
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Why #1: Based in London, Ontario, Canada · In business 10+ years · professional accreditation, as stated on its own website, read 28 Sept 2026
Not yet on record: client reviews, vetting.
Durward Jones Barkwell & Company LLP
Known as DJB, Durward Jones Barkwell and Company LLP serves the Niagara, Hamilton and Halton regions of Ontario from several offices.
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Why #2: Based in Niagara, Hamilton and Halton, Ontario, Canada · Founded 1940, as stated on its own website, read 29 Sept 2026
Not yet on record: client reviews, vetting.
Davis Martindale LLP
More than fifty-five years of practice in Ontario sit behind this chartered accounting firm, which works from London and Toronto for clients across Canada and abroad.
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Why #3: Based in London and Toronto, Ontario, Canada · In business 55+ years, as stated on its own website, read 29 Sept 2026
Not yet on record: client reviews, vetting.
Goodman Mintz, LLP
Tax · Accounting · Government · Also in Quebec
Goodman Mintz, LLP is a firm of chartered professional accountants in Toronto, Ontario.
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Why #4: Based in Toronto, Ontario, Canada · In business 44+ years, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
Hogg, Shain & Scheck
Not for Profit · Tax · Accounting
Operating across the Greater Toronto Area, Hogg, Shain & Scheck is a boutique professional corporation of chartered accountants with more than forty-three years behind it.
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Why #5: Based in Greater Toronto Area, Ontario, Canada · In business 43+ years · Boutique, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
C & V Income Tax Services
Tax · Property
C & V Income Tax Services prepares personal and business income tax returns in London, Ontario, Canada, a practice it says it has run since 1988.
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Why #6: Based in London, Ontario, Canada · Founded 1988, as stated on its own website, read 28 Sept 2026
Not yet on record: client reviews, vetting.
Jaggi Accounting Services Inc
Accounting · Residential · Also in Toronto
Serving the Greater Toronto Area since 1989, Jaggi Accounting Services Inc works from Mississauga, Ontario, with businesses and individuals.
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Why #7: Based in Mississauga, Ontario, Canada · Founded 1989, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
ANG CPA Professional Corporation
Business Services
Chartered accounting practice in Ontario handling bookkeeping, audits and tax returns for small firms, charities and individuals
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Why #8 (shared): Based in Vaughan, Ontario, Canada · Founded 1990, as stated on its own website, read 28 Sept 2026
Not yet on record: client reviews, vetting.
Accurate Accounting & Tax Service
Ontario accounting practice offering small business bookkeeping, payroll, tax preparation and business coaching since 1990
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Why #8 (shared): Based in Ontario, Canada · Founded 1990 · Sole proprietor, as stated on its own website, read 28 Sept 2026
Not yet on record: client reviews, vetting.
HR Associates
Not for Profit
Ontario provider of interim professionals, recruitment, assessment and HR consulting for public and not-for-profit organisations
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Why #10: Based in Ontario, Canada · Founded 1996, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
Bowerman Jack CPA
A professional corporation of chartered accountants in Nepean, Ontario, handling accounts and tax for clients of every size
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Why #11: Based in Nepean, Ontario · Founded 1997, as stated on its own website, read 28 Sept 2026
Not yet on record: client reviews, vetting.
Afshan Ahmad CPA Professional Corporation
Tax · Accounting
Afshan Ahmad CPA Professional Corporation serves clients across Ontario largely by remote working.
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Why #12 (shared): Based in Whitby, Ontario, Canada · Founded 2001, as stated on its own website, read 28 Sept 2026
Not yet on record: client reviews, vetting.
Alan McPherson CPA
Tax
Alan McPherson CPA is a chartered professional accountant's practice in Thornbury, Ontario.
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Why #12 (shared): Based in Thornbury, Ontario · In business 25+ years, as stated on its own website, read 28 Sept 2026
Not yet on record: client reviews, vetting.
Bytown Accounting & Tax Services.
Tax · Accounting · Corporation
Bytown Accounting & Tax Services is an accounting and bookkeeping practice in Ottawa, Ontario, which has helped businesses with their bookkeeping and tax needs since 2002.
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Why #14 (shared): Based in Ottawa, Ontario, Canada · Founded 2002 · Family business, as stated on its own website, read 28 Sept 2026
Not yet on record: client reviews, vetting.
Bytown Accounting
Tax · Accounting · Corporation
Bytown Accounting is a family-run bookkeeping and tax practice in Ottawa, Ontario, incorporated in August 2002.
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Why #14 (shared): Based in Ottawa, Ontario, Canada · Founded 2002 · Family-run, as stated on its own website, read 28 Sept 2026
Not yet on record: client reviews, vetting.
First Tax
Tax · Accounting · Government · Also in Canada
Serving individuals and businesses in Kingston, Ontario since 2002, First Tax is a year-round tax return practice.
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Why #14 (shared): Based in Kingston, Ontario, Canada · Founded 2002, as stated on its own website, read 29 Sept 2026
Not yet on record: client reviews, vetting.
Hotay Professional Corporation
Owner-managed companies, professionals and families across Ontario are the people whose returns and books the Mississauga office of Hotay Professional Corporation prepares.
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Why #17: Based in Mississauga, Ontario, Canada · Founded 2003, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
A Garg CPA Professional Corporation
Tax · Accounting · Reporting
Accounting and tax services come from A Garg CPA Professional Corporation, a firm based in Burlington, Ontario, that has looked after individuals and companies around Toronto since…
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Why #18 (shared): Based in Burlington, Ontario, Canada · Founded 2004, as stated on its own website, read 28 Sept 2026
Not yet on record: client reviews, vetting.
GBC
Richmond Hill HR consultancy offering project work and outsourced human resources support to small and mid-sized organisations
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Why #18 (shared): Based in Richmond Hill, Ontario, Canada · Founded 2004, as stated on its own website, read 29 Sept 2026
Not yet on record: client reviews, vetting.
Douglas Spence CPA, CA Professional Corporation
Tax · Accounting · Medical · Also in Canada
Douglas Spence CPA, CA Professional Corporation trades as Douglas Spence & Associates CPAs, a licensed public accounting firm in Oakville, Ontario that also serves the surrounding…
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Why #20: Based in Oakville, Ontario, Canada · Founded 2005, as stated on its own website, read 29 Sept 2026
Not yet on record: client reviews, vetting.
Canadian Accounting & Financial Services
Canadian Accounting & Financial Services is an accounting and tax practice in London, ON, led by Mohamed Al Bayoumi, who brings two decades of work in accounting, tax and…
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Why #21 (shared): Address in Ontario · In business 20+ years, as stated on its own website, read 28 Sept 2026
Not yet on record: client reviews, vetting.
Alan I. Stern, Chartered Accountant
Alan I. Stern, Chartered Accountant is a small practice in North York, Ontario.
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Why #21 (shared): Based in North York, Ontario, Canada · In business 20+ years · Small practice, as stated on its own website, read 28 Sept 2026
Not yet on record: client reviews, vetting.
Legacy Consulting
Tax · Accounting
Legacy Consulting provides accounting and business consulting in Ontario. It handles day-to-day bookkeeping needs for owner-managed organisations, foundations and families.
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Why #21 (shared): Based in Ontario, Canada · In business 20+ years · Owner-managed, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
Aneal R. Thansingh & company
Aneal R. Thansingh & company is an accounting practice based in Mississauga, Ontario, that serves business and personal clients across the GTA.
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Why #21 (shared): Based in Mississauga, Ontario · In business 20+ years, as stated on its own website, read 28 Sept 2026
Not yet on record: client reviews, vetting.

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Top Accounting Firms in Ontario

Concise Tax Service Inc.

Durward Jones Barkwell & Company LLP

Davis Martindale LLP

Goodman Mintz, LLP

Hogg, Shain & Scheck

C & V Income Tax Services

Jaggi Accounting Services Inc

ANG CPA Professional Corporation

Accurate Accounting & Tax Service

HR Associates

Bowerman Jack CPA

Afshan Ahmad CPA Professional Corporation

Alan McPherson CPA

Bytown Accounting & Tax Services.

Bytown Accounting

First Tax

Hotay Professional Corporation

A Garg CPA Professional Corporation

GBC

Douglas Spence CPA, CA Professional Corporation

Canadian Accounting & Financial Services

Alan I. Stern, Chartered Accountant

Legacy Consulting

Aneal R. Thansingh & company

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