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Top Accounting Firms in Ontario

77 accounting firms ranked by rating, review volume and listing quality.

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.

How this is ranked About this edition

All accounting firms 18 ranked SMEs 17 ranked

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Durward Jones Barkwell & Company LLP
Durward Jones Barkwell & Company LLP, or DJB, is a firm of chartered professional accountants in Ontario.
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Why #1: 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.
C & V Income Tax Services
Tax · Property
C & V Income Tax Services prepares income tax returns in London, Ontario, and has done so since 1988.
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Why #2: 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
Jaggi Accounting Services Inc is an accounting practice in Mississauga, Ontario.
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Why #3: Based in Mississauga, Ontario, Canada · Founded 1989 — as stated on its own website, read 5 Oct 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 #4: 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 #5: 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 #6: 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 is a chartered accounting practice that works virtually for clients across Ontario, with roots in Whitby and the Durham Region going back…
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Why #7: Based in Whitby, Ontario, Canada · Founded 2001 — 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
First Tax prepares income tax returns in Kingston, Ontario, and has served the area since 2002.
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Why #8 (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.
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 #8 (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.
Bytown Accounting & Tax Services.
Tax · Accounting · Corporation
Bytown Accounting & Tax Services. is an accounting firm in Ottawa that has handled bookkeeping and tax work for businesses since 2002.
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Why #8 (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.
Hotay Professional Corporation
Hotay Professional Corporation is an accounting firm in Mississauga, Ontario, serving businesses, professionals and families across the province.
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Why #11: 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
A Garg CPA Professional Corporation is an accounting and tax firm in Burlington, Ontario, serving individuals and businesses in and around Toronto since 2004.
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Why #12 (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 - Graham Brown Consulting Inc.
Richmond Hill HR consultancy offering project work and outsourced human resources support to small and mid-sized organisations
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Why #12 (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 #14: Based in Oakville, Ontario, Canada · Founded 2005 — as stated on its own website, read 29 Sept 2026
Not yet on record: client reviews, vetting.
Libralato & Company Business Solutions
Tax · Accounting
Libralato & Company Business Solutions is an accounting and consulting firm in Bolton, Ontario.
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Why #15: Based in Bolton, Ontario, Canada · Founded 2008 — as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
Connect Staffing, Inc
Connect Staffing, Inc is a recruitment and staffing agency that focuses on matching job seekers with employers whose workplace culture suits them.
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Why #16: Office in Ontario · Founded 2012 — as stated on its own website, read 28 Sept 2026
Not yet on record: client reviews, vetting.
Concise Tax Service Inc.
Tax · Government · Also in London
Concise Tax Service Inc. is an accounting and tax practice in London, Ontario, serving individuals and businesses across Canada.
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Why #17 (shared): Based in London, Ontario, Canada · professional accreditation — as stated on its own website, read 28 Sept 2026
Not yet on record: client reviews, vetting.
Counttech CPA
Counttech CPA is a Toronto accounting practice that works virtually, serving people and small companies anywhere in Canada.
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Why #17 (shared): Based in Toronto, Ontario, Canada · professional accreditation — as stated on its own website, read 28 Sept 2026
Not yet on record: client reviews, vetting.
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
7th Wave Financial Solutions Ltd.
7th Wave Financial Solutions Ltd. is a family-owned financial advice and tax practice in the Windsor, Ontario area.
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On record: Based in Amherstburg, Ontario (main office) · Family-owned
A. Prabhakar, CA Professional Corporation
Tax
A. Prabhakar, CA Professional Corporation is a firm of Chartered Professional Accountants in Mississauga, Ontario.
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On record: Based in Mississauga, Ontario, Canada
A.R. Malik Professional Corporation
A.R. Malik Professional Corporation is a CPA-led accounting and tax practice in Markham, Ontario.
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On record: Based in Markham, Ontario, Canada
A&j CPA
A&j CPA, known in full as A&J Chartered Professional Accountants, is an accounting practice based in Ontario.
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On record: Based in Ontario, Canada
Aaqib Z. Shah Chartered Professional Accountant
Not for Profit · Tax · Accounting · Also in Durham and Toronto
Aaqib Z. Shah Chartered Professional Accountant, known as AZS CPA, is an accounting practice serving the Durham Region and the Greater Toronto Area in Canada.
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On record: Based in Durham Region, Ontario
Accountable Inc.
Tax · Accounting · Reporting
London, Ontario bookkeeping firm handling transactions, GST returns, payroll remittances and monthly statements for businesses
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On record: Based in London, Ontario, Canada

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Top Accounting Firms in Ontario

Durward Jones Barkwell & Company LLP

C & V Income Tax Services

Jaggi Accounting Services Inc

Accurate Accounting & Tax Service

HR Associates

Bowerman Jack CPA

Afshan Ahmad CPA Professional Corporation

First Tax

Bytown Accounting

Bytown Accounting & Tax Services.

Hotay Professional Corporation

A Garg CPA Professional Corporation

GBC - Graham Brown Consulting Inc.

Douglas Spence CPA, CA Professional Corporation

Libralato & Company Business Solutions

Connect Staffing, Inc

Concise Tax Service Inc.

Counttech CPA

7th Wave Financial Solutions Ltd.

A. Prabhakar, CA Professional Corporation

A.R. Malik Professional Corporation

A&j CPA

Aaqib Z. Shah Chartered Professional Accountant

Accountable Inc.

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