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Top Accounting Firms in Orange County

7 of 15 accounting firms ranked on evidence in the Q4 2026 edition.

Between them, the 15 accounting firms on this page cover tax (10), accounting (9), reporting (3) and goals (3). They also list work in California and Southern California. 15 of them have written a profile you can read before you get in touch.

TrustList ranking

Q4 2026 edition

7 of 15 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 7 ranked SMEs 7 ranked

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Fenster and Fenster CPA’s
Tax · Accounting · Also in California
Fenster and Fenster CPA's is a certified public accounting practice serving the Inland Empire and Orange County.
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Why #1: Based in Inland Empire and Orange County, California · Founded 1958, as stated on its own website, read 29 Sept 2026
Not yet on record: client reviews, vetting.
KeysCPA Inc.
Accounting · simple · Goals
Orange County firm of certified public accountants offering tax, accounting and consulting for individuals and businesses
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Why #2 (shared): Based in Orange County, USA · In business 40+ years, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
Heston & Heston
Property · Also in Newport and Ontario
Heston & Heston is a law firm in Southern California that handles bankruptcy cases.
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Why #2 (shared): Based in Orange County and Riverside County, California · In business 40+ years, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
HELFMAN, DAVIS & CLANTON CPAs, apc
Tax · Accounting · Goals
HELFMAN, DAVIS & CLANTON CPAs, apc is an accounting firm in Orange County, California, whose website now uses the name Helfman Davis & Associates. It has operated since 1988.
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Why #4: Based in Orange County, California, USA · Founded 1988, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
KKB&N Certified Public Accountants
Tax
KKB&N Certified Public Accountants is a client-focused accounting firm with offices serving Orange County and Middletown in New York.
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Why #5: Based in Orange County and Middletown, New York · Founded 1990, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
Haskell & White
Non Profit · Tax · Accounting · Also in California
Haskell & White is a certified public accounting firm serving Southern California, with offices covering Orange County and San Diego.
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Why #6: Based in Orange County and San Diego, California · In business 35+ years, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
Khan & Associates CPA
Tax · Accounting · simple · Also in United States
Khan & Associates CPA is an accounting practice in Orange County, California.
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Why #7: Based in Orange County, California · In business 20+ years, as stated on its own website, read 5 Oct 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
Lenning & Co., Inc.
Tax · Accounting · Partnership · Also in Illinois and Reading
Lenning & Co., Inc. is an accounting practice founded in 1979 by Gerald Lenning, a certified public accountant, at its Seal Beach office.
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On record: Founded 1979, as stated on its own website, read 5 Oct 2026
D&B Consulting
Reporting · Also in Orange County, California
D&B Consulting, now D&B Consulting and Accounting, Inc., is an audit and accounting firm in Orange County, California.
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On record: Based in Orange County, California, United States
Elaine Lew, CPA
Tax · Reporting · Property · Also in Laguna
Elaine Lew, CPA is a certified public accountant practice in Orange County, California.
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On record: Based in Orange County, California
Hassan Rashwan CPA
Non Profit · Tax · Accounting
Hassan Rashwan CPA is a certified public accounting practice in Orange County, California.
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On record: Based in Anaheim, Orange County, California
JLK Rosenberger LLP CPAs
JLK Rosenberger LLP CPAs is a certified public accounting firm with three offices, in Los Angeles and Orange County in California and in Dallas, Texas.
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On record: Based in Los Angeles, Orange County and Dallas
Kartchner & Associates
Tax · Accounting
Kartchner & Associates is a firm of certified public accountants in Laguna Niguel, California.
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On record: Based in Laguna Niguel, Orange County, California
Kathy Kulick CPA
Tax · Accounting · simple · Also in Carolina and North Carolina
Kathy Kulick CPA is an independent certified public accountant who takes on everyday accounting so owners can concentrate on running their business.
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KDM Business Consulting
Certified public accounting firm in Orange County offering tax, bookkeeping and consulting for individuals and small businesses
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On record: Based in Orange County, California

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Top Accounting Firms in Orange County

Fenster and Fenster CPA’s

KeysCPA Inc.

Heston & Heston

HELFMAN, DAVIS & CLANTON CPAs, apc

KKB&N Certified Public Accountants

Haskell & White

Khan & Associates CPA

Lenning & Co., Inc.

D&B Consulting

Elaine Lew, CPA

Hassan Rashwan CPA

JLK Rosenberger LLP CPAs

Kartchner & Associates

Kathy Kulick CPA

KDM Business Consulting

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