CPAs & Accountants in Ontario, CA — 15 Firms (2026)
15 CPA firms in Ontario, California meet our listing bar — a website plus a public review record. They average 4.93★ across 15 rated firms, and 15 are rated 4.5★ or higher. The highest-rated is Cifuentes & Associates Ltd. Liability Co. at 5.0★ across 41 Google reviews.
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CA
CPA FirmOntario, CA
CPA Firm in Ontario, California offering bookkeeping, and tax preparation. Rated 5.0★ across 41 Google reviews.
BC
Bollman Consulting✓ Verified
AccountantOntario, CA
Accountant in Ontario, California offering accounting. Rated 5.0★ across 30 Google reviews.
RC
CPA FirmOntario, CA
CPA Firm in Ontario, California offering advisory. Rated 5.0★ across 25 Google reviews.
MC
CPA FirmOntario, CA
CPA Firm in Ontario, California offering bookkeeping, tax planning, and advisory. Rated 5.0★ across 23 Google reviews.
SC
SB CPA INC✓ Verified
CPA FirmOntario, CA
CPA Firm in Ontario, California offering accounting & tax. Rated 5.0★ across 9 Google reviews.
EB
CPA FirmOntario, CA
CPA Firm in Ontario, California offering audit & assurance, and advisory.
GC
CPA FirmOntario, CA
CPA Firm in Ontario, California offering tax planning, and advisory.
PB
CPA FirmOntario, CA
CPA Firm in Ontario, California offering accounting & tax.
RM
CPA FirmOntario, CA
CPA Firm in Ontario, California offering accounting & tax.
HT
Hongda Tax and Accounting Services✓ Verified
CPA FirmOntario, CA
CPA Firm in Ontario, California offering tax preparation. Rated 4.9★ across 29 Google reviews.
XA
Xel Advisors, CPA✓ Verified
CPA FirmOntario, CA
CPA Firm in Ontario, California offering accounting & tax. Rated 4.8★ across 43 Google reviews.
Top cpas & accountants in Ontario
| # | Firm | Service | Rating | Reviews |
|---|---|---|---|---|
| 1 | Cifuentes & Associates Ltd. Liability Co.✓ | CPA Firm | ★ 5.0 | 41 |
| 2 | Bollman Consulting✓ | Accountant | ★ 5.0 | 30 |
| 3 | ROARK | CFO & Controllers | Executive Search | Project Consultants✓ | CPA Firm | ★ 5.0 | 25 |
| 4 | Meza CPAs, Tax & Accounting✓ | CPA Firm | ★ 5.0 | 23 |
| 5 | SB CPA INC✓ | CPA Firm | ★ 5.0 | 9 |
CPA vs. accountant vs. enrolled agent
A Certified Public Accountant (CPA) has passed the Uniform CPA Exam and holds an active state license, and can perform audits, attest work, and complex tax planning. A general accountant may handle bookkeeping and returns without that license. An Enrolled Agent (EA) is federally licensed by the IRS and specializes in tax and IRS representation. For audited financials or attest services you need a CPA; for most tax filing, a CPA or EA both qualify.