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.
Showing 15 of 15 · sorted by Google rating
1.
Cifuentes & Associates Ltd. Liability Co.
★★★★★★★★★★5.0(41 Google reviews)✓ Verified on Google
CPA Firm · 3400 Inland Empire Blvd #101, Ontario, CA 91764
Services: bookkeeping, tax preparation
2.
Bollman Consulting
★★★★★★★★★★5.0(30 Google reviews)✓ Verified on Google
Accountant · 3281 E Guasti Rd 7th Floor, Ontario, CA 91761
Services: accounting
3.
ROARK | CFO & Controllers | Executive Search | Project Consultants
★★★★★★★★★★5.0(25 Google reviews)✓ Verified on Google
CPA Firm · 3200 E Guasti Rd #100, Ontario, CA 91761
Services: advisory
4.
Meza CPAs, Tax & Accounting
★★★★★★★★★★5.0(23 Google reviews)✓ Verified on GoogleIRS PTIN
CPA Firm · 3350 Shelby St #200, Ontario, CA 91764
Services: bookkeeping, tax planning, advisory
5.
SB CPA INC
★★★★★★★★★★5.0(9 Google reviews)✓ Verified on Google
CPA Firm · 4345 E Lowell St STE G, Ontario, CA 91761
Services: accounting & tax
6.
Eide Bailly
★★★★★★★★★★5.0(1 Google review)✓ Verified on GoogleIRS PTIN
CPA Firm · 901 Via Piemonte #450, Ontario, CA 91764
Services: audit & assurance, advisory
7.
GYL CPAs and Advisors
★★★★★★★★★★5.0(1 Google review)✓ Verified on GoogleIRS PTIN
CPA Firm · 4120 Concours St #100, Ontario, CA 91764
Services: tax planning, advisory
8.
Pangan Benjamin A CPA
★★★★★★★★★★5.0(1 Google review)✓ Verified on GoogleIRS PTIN
CPA Firm · 3100 E Cedar St STE 12, Ontario, CA 91761
Services: accounting & tax
9.
Raul Marquez, CPA Accounting Office
★★★★★★★★★★5.0(1 Google review)✓ Verified on GoogleIRS PTIN
CPA Firm · 525 W Holt Blvd, Ontario, CA 91762
Services: accounting & tax
10.
H&R Block
★★★★★★★★★★4.9(79 Google reviews)✓ Verified on Google
CPA Firm · 120 S San Antonio Ave B, Ontario, CA 91762
Services: tax preparation, tax planning, advisory
11.
Hongda Tax and Accounting Services
★★★★★★★★★★4.9(29 Google reviews)✓ Verified on Google
CPA Firm · 2920 Inland Empire Blvd #105, Ontario, CA 91764
Services: tax preparation
12.
H&R Block
★★★★★★★★★★4.8(83 Google reviews)✓ Verified on Google
CPA Firm · 2503 S Euclid Ave Unit E, Ontario, CA 91761
Services: tax preparation, tax planning, advisory
13.
H&R Block
★★★★★★★★★★4.8(78 Google reviews)✓ Verified on Google
CPA Firm · 960 N Mountain Ave, Ontario, CA 91762
Services: tax preparation, tax planning, advisory
14.
Xel Advisors, CPA
★★★★★★★★★★4.8(43 Google reviews)✓ Verified on Google
CPA Firm · 337 N Vineyard Ave #230, Ontario, CA 91764
Services: accounting & tax
15.
H&R Block
★★★★★★★★★★4.7(76 Google reviews)✓ Verified on Google
CPA Firm · 1831 E 4th St, Ontario, CA 91764
Services: tax preparation, tax planning, advisory
Top CPA and accounting firms in Ontario
| # | Firm | Service | Google rating | Reviews |
|---|---|---|---|---|
| 1 | Cifuentes & Associates Ltd. Liability Co. | CPA Firm | 5.0 / 5 | 41 |
| 2 | Bollman Consulting | Accountant | 5.0 / 5 | 30 |
| 3 | ROARK | CFO & Controllers | Executive Search | Project Consultants | CPA Firm | 5.0 / 5 | 25 |
| 4 | Meza CPAs, Tax & Accounting | CPA Firm | 5.0 / 5 | 23 |
| 5 | SB CPA INC | CPA Firm | 5.0 / 5 | 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.