Top Rated CPAs in Riverside, CA (2026)
Choosing the right cpa in Riverside, CA can be overwhelming. With 41 cpas operating across the Riverside metro area, how do you separate the truly exceptional from the merely adequate? At Top CPAs, we analyze publicly available data to rank every cpa on a transparent, editorial basis -- no paid placements, no sponsored rankings.
This 2026 ranking evaluates cpas in Riverside, California using aggregate customer ratings across Google and verified review platforms. We reviewed 41 active businesses in the Riverside market and selected the top 15 for this list.
By the numbers: Guide Score percentages on this list range from 62% to 71%, 7 of 15 hold professional certifications, the average firm has 42 years of experience. Updated June 2026.
Each entry below includes the business's Guide Score, star rating, review count, and a data-driven explanation of why they earned their spot. Click through to any profile for the full breakdown including contact information, specialties, credentials, and related businesses in Riverside.
The Top 15 CPAs in Riverside, CA
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#1 Martin's Tax Service 71%
Selected for specializes in automotive, materials, aerospace.
MTS Systems designs and manufactures precision test and simulation systems for automotive, aerospace, biomedical, energy, and civil engineering — trusted by researchers and manufacturers worldwide.
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#2 Marcia L. Campbell, CPA 71%
Selected for 43 years of experience (est. 1983); CPA, EA certified; team of 2 professionals.
ACCOUNTING SERVICES IN REDLANDS, CA | LAKE ARROWHEAD, CA | FRANKLIN, TNAccountants & Business AdvisorsConnect With Us909-825-6600
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#3 MC Herting, CPA 71%
Selected for CPA certified; team of 2 professionals; specializes in estates and trusts, in this section:, quick links:.
MC Herting, CPA serves Riverside and surrounding CA communities with professional accounting services. Reach them at +19517849753. Visit their website to learn more about their work. Located at 3890…
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#4 Vernon Oates CPA P.C. 69%
Selected for CPA certified; specializes in ask a question, we are here to help, send us a file.
Vernon Oates CPA P.C. brings professional accounting expertise to the Riverside, CA community. Located at 4100 Latham St. Reach them at +19512899135. Visit their website for more details on services…
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#5 Divine Business Services 69%
Selected for CPA certified; team of 5 professionals.
Divine Business Services brings professional accounting expertise to the Riverside, CA community. Reach them at 9513139523 or email info@godivineonline.com. Visit their website to learn more about th…
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#6 Frank Stearns 69%
Selected for team of 3 professionals; specializes in business services, tax services, contact us.
Frank Stearns has built a reputation for quality accounting work in the Riverside, CA area. Reach them at +19517805100 or email fstearns@fwscpa.com. Visit their website to learn more about their work…
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Ranked 7th among cpas in this market based on overall Guide Score.
The Riverside, CA area is home to Alvey Virtual Tax & Financial Corporation, an dedicated accounting firm serving local clients. Reach them at +18006896946 or email maribel@alveyvirtualtax.com. Visit…
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#8 Valencia Tax Service 68%
Selected for 21 years of experience (est. 2005); specializes in call us!, services | valencia tax service (951) 343 1313 info@valenciataxservice.com facebook, facebook.
Valencia Tax Service, a Professional Tax Preparers help you with Book keeping, Business taxes, Cooperate taxes ( S corps & Partnerships), Filling sales tax, Immigration services, Individual taxes, IR…
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#9 JG Professional Accountants 66%
Selected for specializes in services, what we do, accounting services.
JG Professional Accountants is an Riverside-based accounting firm offering full-service accounting solutions to clients across CA. JG Professional Accountants, Co. proporciona servicios profesionales…
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#10 Osunas Services 66%
Selected for specializes in osuna´s services search this site embedded files skip to main content skip to navigation osuna´s services nuestro menu envíos de dinero, paqueteria, registración/seguro auto vida.
From their base in Riverside, Osunas Services serves accounting clients across CA. Their services include osuna´s services search this site embedded files skip to main content skip to navigation osun…
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#11 Casillas Accountancy Group 65%
Selected for 38 years of experience (est. 1988); team of 2 professionals; specializes in tax services, estate planning, irs audit representation.
Casillas Accountancy Group brings reliable accounting services to Riverside and nearby communities in CA. Reach out at +19516890680 or visit them online.
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#12 Advanced Tax Solutions Inc 64%
Selected for EA, MBA certified; specializes in in this section, contact us, client portal.
Advanced Tax Solutions Inc brings professional accounting expertise to the Riverside, CA community. Located at 6864 Indiana Ave Ste 103. Reach them at 9512762999. Visit their website for more details…
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#13 American Business Tax School 64%
Selected for EA certified; team of 2 professionals.
American Business Tax School provides accounting services across Riverside, CA. Reach them at +19516609507 or email contact@jgaccountant.com. Visit their website to learn more about their work. Locat…
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#14 Shaila Chamberlain 64%
Selected for CPA certified; team of 2 professionals.
S Chamberlain CPA offers tax, accounting, and advisory services to small, and medium-sized businesses in Riverside and the Inland Empire
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#15 SingerLewak, LLP 62%
Selected for 67 years of experience (est. 1959); team of 450 professionals.
Residents of Riverside, CA looking for expert accounting services can rely on SingerLewak, LLP. Reach them at 9516830672. Visit their website to learn more about their work. Located at 1650 Iowa Ave…
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How We Ranked These CPAs
This list ranks cpas by their aggregate customer rating (Google and verified review platforms). Ties are broken by Guide Score. Only businesses with at least one verified review are eligible.
Data sources include Google Business Profile, professional registries, portfolio sites, press databases, and direct business submissions. Every piece of data is publicly verifiable.
Frequently Asked Questions
How did we rank the best cpas in Riverside?
Top CPAs ranks cpas using our Guide Score percentage, a composite metric computed from publicly available data. The score uses weighted evidence from ratings, review volume, web presence, profile completeness, credentials, press recognition, and experience, then normalizes across categories where positive evidence was captured. Categories with no captured signal are not counted as failing grades. There is no paid placement -- every ranking is purely editorial.
Who is the #1 cpa in Riverside, CA?
As of 2026, Martin's Tax Service holds the #1 ranking in Riverside with a Guide Score of 71%. Rankings are recalculated with every data update and reflect the latest available information.
How often is this list updated?
Core data (ratings, reviews, contact information) is re-verified on a rolling monthly cadence. Credentials and awards are audited quarterly. Guide Scores recalculate automatically with every data update, so rankings may shift as new reviews are posted or credentials are verified.
How many cpas are there in Riverside?
Our database currently tracks 41 active cpas in the Riverside, CA metro area. This list highlights the top 15 based on Guide Score. Browse our full Riverside directory to see every listed business.
Can a cpa pay to be ranked higher?
No. Top CPAs does not accept payment for rankings. Guide Scores are computed algorithmically from verified public data. Businesses can claim and update their profile with accurate information, but the ranking algorithm treats all profiles equally. Our editorial independence is core to our methodology.
What should I look for when hiring a cpa in Riverside?
We recommend evaluating: (1) professional certifications and credentials, (2) verified customer reviews and ratings, (3) years of experience in the Riverside market, (4) portfolio quality and range of work, (5) budget alignment with your project scope, and (6) responsiveness and communication style. Our Guide Score weighs these factors so you can compare at a glance.