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Christopher G Carmona CPA
“I recently had the pleasure of working with CPA Christopher for my tax preparation, and I must say, I am extremely impressed with his professionalism, knowledge, and efficiency.”
Best CPAs in Diamond Bar, CA
15 firms listed · 6 in Diamond Bar · 1 open 24/7 · 2 open weekends · 11 rated 4.5+
Data verified October 21, 2026
Harry C. Lin, CPA A Professional Corporation 林清吉聯合會計師事務所
“They're knowledgeable, hard-working, meticulous, extremely thorough, conscientious, and abreast of the latest developments.”
Mead, Coley and Company Cpa's
“We have been using them for our business for many years and they are professional and knowledgeable.”
Millennial Cpa, Tax & Accounting
Patrick W. Medlock, CPA
FAN & LI
The 15 firms listed for Diamond Bar, CA are accounting practices that serve businesses and organizations. What each states about its CPA license and assurance work comes from its own website; ratings and quotes come from public reviews.
Area overview: Diamond Bar, CA
6 of the 15 firms we list are based in Diamond Bar; the other 9 serve Diamond Bar from towns including Brea (6 mi), Chino Hills (6 mi) and Covina (7 mi). 12 of the firms on this page have a rating, from 4.1 to 5.0 across 270 reviews; 1 has 50 or more reviews and 11 are rated 4.5 or higher. The topics that come up most in reviews of the firms on this page are "efficient" and "patient". 1 is open around the clock; 2 are open on Saturdays and 1 on Sundays. The services the firms on this page list most often on their websites are accounting services (6), tax services (6), payroll services (3), business valuations (2) and cash flow management (2). 2 show a license on their websites and 1 has a BBB rating of A or A+. 10 have ten or more years of experience, the longest 37 years. 1 offers urgent consultations; 2 offer payment plans; 5 offer a free initial consultation and 1 is family- or locally-owned. We count these figures across the firms on this page; distances are straight-line, and hours and prices change, so confirm the details with the firm before you book a consultation.
Which CPA firms listed for Diamond Bar list their assurance services?
Website details are held for all 15 firms on this page. Most name the engagement types they perform and the industries they serve, which is the quickest way to see whether audit work is core business or an occasional job for them.
HRL TAX Solutions
“My husband and I have been filing our taxes with him since 2019 and we constantly sing his praises.”
Elite Accountants Group
“They great, on of the greatest place”
Pelletier & Leo
“Friendly service, careful work, and good control over the progress of things!”
Nexus Square
“I am very impressed by the efficiency of the employees.”
Smartcpa - Chino Hills
“Thank you for putting more money in my pocket and for answering all my questions!”
Desi Tax & Bookkeeping
“But @ Desi Tax, its a pleasant experience@ Desi, consultation is easy, price is simple, people are honest, submission is online.”
Brhe Group
“The staff is very welcoming, the customer service is great, and I'm in great hands with these professionals.”
Epay Payroll
“One thing I noticed and a major reason I went with Epay payroll is that each plan is tailored for your business plans.”
Keystone CPA
“They are extremely knowledgeable about all tax related issues with real estate ownership.”
Why these companies made our list
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