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.
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AC
ACE Cash Express✓ Verified
Tax PreparationOntario, CA
Tax Preparation in Ontario, California offering tax preparation. Rated 5.0★ across 506 Google reviews.
MA
Tax PreparationOntario, CA
Tax Preparation in Ontario, California offering tax preparation. Rated 5.0★ across 47 Google reviews.
MI
Monumental Insurance✓ Verified
Tax PreparationOntario, CA
Tax Preparation in Ontario, California offering tax preparation. Rated 5.0★ across 12 Google reviews.
RA
RFS Accounting and Taxes✓ Verified
Tax PreparationOntario, CA
Tax Preparation in Ontario, California offering tax planning, and advisory. Rated 5.0★ across 10 Google reviews.
CF
Tax PreparationOntario, CA
Tax Preparation in Ontario, California offering tax preparation. Rated 5.0★ across 9 Google reviews.
OS
One Stop Tax Services✓ Verified
Tax PreparationOntario, CA
Tax Preparation in Ontario, California offering tax preparation. Rated 5.0★ across 7 Google reviews.
SC
Stone Creek Tax Relief✓ Verified
Tax PreparationOntario, CA
Tax Preparation in Ontario, California offering tax preparation. Rated 5.0★ across 5 Google reviews.
FA
Fiesta Auto Insurance & Tax Service✓ Verified
Tax PreparationOntario, CA
Tax Preparation in Ontario, California offering tax preparation. Rated 4.9★ across 497 Google reviews.
RT
RCS Tax Group✓ Verified
Tax PreparationOntario, CA
Tax Preparation in Ontario, California offering tax preparation. Rated 4.9★ across 198 Google reviews.
FI
Fernandez Income Tax✓ Verified
Tax PreparationOntario, CA
Tax Preparation in Ontario, California offering tax preparation, tax planning, and advisory. Rated 4.9★ across 175 Google reviews.
TG
TurboTax - Guasti, Ontario✓ Verified
Tax PreparationOntario, CA
Tax Preparation in Ontario, California offering tax preparation, tax planning, and advisory. Rated 4.9★ across 22 Google reviews.
AC
ACE Cash Express✓ Verified
Tax PreparationOntario, CA
Tax Preparation in Ontario, California offering tax preparation. Rated 4.8★ across 415 Google reviews.
JH
Jackson Hewitt Tax Service✓ Verified
Tax PreparationOntario, CA
Tax Preparation in Ontario, California offering tax preparation, tax planning, and advisory. Rated 4.8★ across 126 Google reviews.
NB
NARDOS BUSINESS SERVICES LLC✓ Verified
Tax PreparationOntario, CA
Tax Preparation in Ontario, California offering tax preparation. Rated 4.8★ across 25 Google reviews.
1C
1st CHOICE TAX PREPARATION✓ Verified
Tax PreparationOntario, CA
Tax Preparation in Ontario, California offering tax preparation. Rated 4.8★ across 23 Google reviews.
RB
Reyes Bookkeeping & Income Tax✓ Verified
Tax PreparationOntario, CA
Tax Preparation in Ontario, California offering payroll, and tax preparation. Rated 4.8★ across 15 Google reviews.
LT
Liberty Tax✓ Verified
Tax PreparationOntario, CA
Tax Preparation in Ontario, California offering tax preparation, tax planning, and advisory. Rated 4.7★ across 125 Google reviews.
AR
Aida Real Professional Services✓ Verified
Tax PreparationOntario, CA
Tax Preparation in Ontario, California offering tax preparation. Rated 4.7★ across 108 Google reviews.
MO
Mi Oficina Income Tax & Insurance✓ Verified
Tax PreparationOntario, CA
Tax Preparation in Ontario, California offering tax preparation. Rated 4.6★ across 52 Google reviews.
AT
Americanas Travel & Multiservices, Inc.✓ Verified
Tax PreparationOntario, CA
Tax Preparation in Ontario, California offering tax preparation. Rated 4.5★ across 17 Google reviews.
BR
Tax PreparationOntario, CA
Tax Preparation in Ontario, California offering tax preparation. Rated 4.5★ across 6 Google reviews.
EI
Enriquez Income Tax✓ Verified
Tax PreparationOntario, CA
Tax Preparation in Ontario, California offering tax preparation. Rated 4.4★ across 57 Google reviews.
MI
Moreno's Income Tax Services✓ Verified
Tax PreparationOntario, CA
Tax Preparation in Ontario, California offering tax preparation. Rated 4.4★ across 33 Google reviews.
PI
Panamericana Income Tax - Ontario✓ Verified
Tax PreparationOntario, CA
Tax Preparation in Ontario, California offering tax preparation. Rated 3.3★ across 13 Google reviews.
Top tax preparers in Ontario
| # | Firm | Service | Rating | Reviews |
|---|---|---|---|---|
| 1 | ACE Cash Express✓ | Tax Preparation | ★ 5.0 | 506 |
| 2 | Madero Accountancy Practice, PC✓ | Tax Preparation | ★ 5.0 | 47 |
| 3 | Monumental Insurance✓ | Tax Preparation | ★ 5.0 | 12 |
| 4 | RFS Accounting and Taxes✓ | Tax Preparation | ★ 5.0 | 10 |
| 5 | Corellia Finance & Tax | Tax Preparation | ★ 5.0 | 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.