Tax Preparers in Ontario, CA — 26 Firms (2026)
26 tax preparers in Ontario, California meet our listing bar — a website plus a public review record. They average 4.60★ across 26 rated firms, and 22 are rated 4.5★ or higher. The highest-rated is ACE Cash Express at 5.0★ across 506 Google reviews.
Showing 26 of 26 · sorted by Google rating
1.
ACE Cash Express
★★★★★★★★★★5.0(506 Google reviews)✓ Verified on Google
Tax Preparation · 1856 S Euclid Ave B, Ontario, CA 91762
2.
Madero Accountancy Practice, PC
★★★★★★★★★★5.0(47 Google reviews)✓ Verified on GoogleIRS PTIN
Tax Preparation · 4055 E Hamilton Paseo, Ontario, CA 91761
3.
Monumental Insurance
★★★★★★★★★★5.0(12 Google reviews)✓ Verified on Google
Tax Preparation · 1945 E Riverside Dr #4, Ontario, CA 91761
4.
RFS Accounting and Taxes
★★★★★★★★★★5.0(10 Google reviews)✓ Verified on Google
Tax Preparation · 980 W 6th St Ste 107, Ontario, CA 91762
Services: tax planning, advisory
5.
Corellia Finance & Tax
★★★★★★★★★★5.0(9 Google reviews)
Tax Preparation · 2990 Inland Empire Blvd #114, Ontario, CA 91764
6.
One Stop Tax Services
★★★★★★★★★★5.0(7 Google reviews)✓ Verified on Google
Tax Preparation · 2990 Inland Empire Blvd, Ontario, CA 91764
7.
Stone Creek Tax Relief
★★★★★★★★★★5.0(5 Google reviews)✓ Verified on Google
Tax Preparation · 3200 E Guasti Rd Ste 100, Ontario, CA 91761
8.
Fiesta Auto Insurance & Tax Service
★★★★★★★★★★4.9(497 Google reviews)✓ Verified on Google
Tax Preparation · 2213 S Mountain Ave, Ontario, CA 91762
9.
RCS Tax Group
★★★★★★★★★★4.9(198 Google reviews)✓ Verified on Google
Tax Preparation · 3200 E Guasti Rd Ste 100 Unit 7, Ontario, CA 91761
10.
Fernandez Income Tax
★★★★★★★★★★4.9(175 Google reviews)✓ Verified on Google
Tax Preparation · 115 W B St, Ontario, CA 91762
Services: tax planning, advisory
11.
Tax365
★★★★★★★★★★4.9(73 Google reviews)✓ Verified on Google
Tax Preparation · 720 N Archibald Ave c, Ontario, CA 91764
Services: tax planning, advisory
12.
TurboTax - Guasti, Ontario
★★★★★★★★★★4.9(22 Google reviews)✓ Verified on Google
Tax Preparation · 3350 Shelby St Office 227 / 228, Ontario, CA 91764
Services: tax planning, advisory
13.
ACE Cash Express
★★★★★★★★★★4.8(415 Google reviews)✓ Verified on Google
Tax Preparation · 658 W Holt Blvd C, Ontario, CA 91762
14.
Jackson Hewitt Tax Service
★★★★★★★★★★4.8(126 Google reviews)✓ Verified on Google
Tax Preparation · 1333 N Mountain Ave, Ontario, CA 91762
Services: tax planning, advisory
15.
NARDOS BUSINESS SERVICES LLC
★★★★★★★★★★4.8(25 Google reviews)✓ Verified on Google
Tax Preparation · 1128 W Mission Blvd F, Ontario, CA 91762
16.
1st CHOICE TAX PREPARATION
★★★★★★★★★★4.8(23 Google reviews)✓ Verified on Google
Tax Preparation · 700 N Mountain Ave #101, Ontario, CA 91762
17.
Reyes Bookkeeping & Income Tax
★★★★★★★★★★4.8(15 Google reviews)✓ Verified on Google
Tax Preparation · 931 W Holt Blvd Suite C, Ontario, CA 91762
Services: payroll
18.
Liberty Tax
★★★★★★★★★★4.7(125 Google reviews)✓ Verified on Google
Tax Preparation · 870 S Mountain Ave, Ontario, CA 91762
Services: tax planning, advisory
19.
Aida Real Professional Services
★★★★★★★★★★4.7(108 Google reviews)✓ Verified on Google
Tax Preparation · 561 W Holt Blvd Ste B, Ontario, CA 91762
20.
Mi Oficina Income Tax & Insurance
★★★★★★★★★★4.6(52 Google reviews)✓ Verified on Google
Tax Preparation · 1245 N Grove Ave a, Ontario, CA 91764
21.
Americanas Travel & Multiservices, Inc.
★★★★★★★★★★4.5(17 Google reviews)✓ Verified on Google
Tax Preparation · 209 W Francis St, Ontario, CA 91762
22.
Barbara Robertson & Associates
★★★★★★★★★★4.5(6 Google reviews)
Tax Preparation · 2990 Inland Empire Blvd #107, Ontario, CA 91764
23.
Enriquez Income Tax
★★★★★★★★★★4.4(57 Google reviews)✓ Verified on Google
Tax Preparation · 610 E Francis St Unit 180, Ontario, CA 91761
24.
Moreno's Income Tax Services
★★★★★★★★★★4.4(33 Google reviews)✓ Verified on Google
Tax Preparation · 939 W Mission Blvd C, Ontario, CA 91762
25.
Panamericana Income Tax - Ontario
★★★★★★★★★★3.3(13 Google reviews)✓ Verified on Google
Tax Preparation · 755 E Holt Blvd B, Ontario, CA 91761
26.
HR Block
★★★★★★★★★★1.0(1 Google review)IRS PTIN
Tax Preparation · 628 W Holt Blvd B, Ontario, CA 91762
Top tax preparers in Ontario
| # | Firm | Service | Google rating | Reviews |
|---|---|---|---|---|
| 1 | ACE Cash Express | Tax Preparation | 5.0 / 5 | 506 |
| 2 | Madero Accountancy Practice, PC | Tax Preparation | 5.0 / 5 | 47 |
| 3 | Monumental Insurance | Tax Preparation | 5.0 / 5 | 12 |
| 4 | RFS Accounting and Taxes | Tax Preparation | 5.0 / 5 | 10 |
| 5 | Corellia Finance & Tax | Tax Preparation | 5.0 / 5 | 9 |
Choosing a tax preparer
Anyone who prepares returns for pay must have an IRS PTIN, but credentials vary widely. CPAs and Enrolled Agents (EAs) have unlimited IRS representation rights; unenrolled preparers do not. For a straightforward W-2 return most preparers suffice; for self-employment, rental, multi-state, or business income, choose a CPA or EA who handles that complexity.