RCS Tax Group
★★★★★ (198 reviews)3200 E Guasti Rd Ste 100 Unit 7, Ontario, CA 91761
(626) 413-3204
Website: www.rcstaxgroup.com
Hours: {"Friday":["9 AM–5 PM"],"Monday":["9 AM–5 PM"],"Saturday":["9 AM–4 PM"],"Sunday":["Closed"],"Thursday":["9 AM–5 PM"],"Tuesday":["9 AM–5 PM"],"Wednesday":["9 AM–5 PM"]}
Aida Real Professional Services
★★★★½ (107 reviews)561 W Holt Blvd STE B, Ontario, CA 91762
(909) 391-7131
Website: aidarealnotary.com
Hours: {"Friday":["11 AM–6 PM"],"Monday":["11 AM–6 PM"],"Saturday":["Closed"],"Sunday":["Closed"],"Thursday":["11 AM–6 PM"],"Tuesday":["11 AM–6 PM"],"Wednesday":["11 AM–6 PM"]}
Latino's Tax Services
★★★★★ (71 reviews)1739 S Euclid Ave Suite B, Ontario, CA 91762
(909) 986-1844
Hours: {"Friday":["9 AM–7 PM"],"Monday":["9 AM–7 PM"],"Saturday":["10 AM–3 PM"],"Sunday":["Closed"],"Thursday":["9 AM–7 PM"],"Tuesday":["9 AM–7 PM"],"Wednesday":["9 AM–7 PM"]}
Enriquez Income Tax
★★★★½ (56 reviews)610 E Francis St Unit 180, Ontario, CA 91761
(909) 460-0659
Website: enriquezservices.com
Hours: {"Friday":["10 AM–6 PM"],"Monday":["Closed"],"Saturday":["10 AM–2 PM"],"Sunday":["Closed"],"Thursday":["10 AM–5 PM"],"Tuesday":["10 AM–5 PM"],"Wednesday":["Closed"]}
Madero Accountancy Practice, PC
★★★★★ (46 reviews)4055 E Hamilton Paseo, Ontario, CA 91761
(909) 375-1250
Website: www.maderocpa.com
Hours: {"Friday":["8 AM–6 PM"],"Monday":["8 AM–6 PM"],"Saturday":["Closed"],"Sunday":["Closed"],"Thursday":["8 AM–6 PM"],"Tuesday":["8 AM–5 PM"],"Wednesday":["8 AM–6 PM"]}
Xel Advisors, CPA
★★★★★ (43 reviews)337 N Vineyard Ave #230, Ontario, CA 91764
(909) 750-0462
Website: www.xeladvisors.com
Hours: {"Friday":["8 AM–5 PM"],"Monday":["8 AM–5 PM"],"Saturday":["10 AM–4 PM"],"Sunday":["Closed"],"Thursday":["8 AM–5 PM"],"Tuesday":["8 AM–5 PM"],"Wednesday":["8 AM–5 PM"]}
Cifuentes & Associates Ltd. Liability Co.
★★★★★ (40 reviews)3400 Inland Empire Blvd #101, Ontario, CA 91764
(909) 324-4464
Website: api.taxnitro.com/widget/appointment/cifuentesandassociatescalendar
Hours: {"Friday":["11:30 AM–7 PM"],"Monday":["11:30 AM–7 PM"],"Saturday":["11:30 AM–7 PM"],"Sunday":["Closed"],"Thursday":["11:30 AM–7 PM"],"Tuesday":["11:30 AM–7 PM"],"Wednesday":["11:30 AM–7 PM"]}
Patriot Tax Services
★★★★½ (41 reviews)4295 E Jurupa St #109, Ontario, CA 91761
(909) 391-3992
Hours: {"Friday":["9 AM–8 PM"],"Monday":["9 AM–8 PM"],"Saturday":["9 AM–8 PM"],"Sunday":["Closed"],"Thursday":["9 AM–8 PM"],"Tuesday":["9 AM–8 PM"],"Wednesday":["9 AM–8 PM"]}
Hongda Tax and Accounting Services
★★★★★ (30 reviews)2920 Inland Empire Blvd #105, Ontario, CA 91764
(951) 880-3938
Website: www.taxhf.com
Hours: {"Friday":["9 AM–3 PM"],"Monday":["9 AM–4 PM"],"Saturday":["Closed"],"Sunday":["Closed"],"Thursday":["9 AM–4 PM"],"Tuesday":["9 AM–4 PM"],"Wednesday":["9 AM–4 PM"]}
Moreno's Income Tax Services
★★★★½ (33 reviews)939 W Mission Blvd C, Ontario, CA 91762
(909) 549-3888
Website: morenosincometax.com
Hours: {"Friday":["Closed"],"Monday":["Closed"],"Saturday":["9 AM–3 PM"],"Sunday":["Closed"],"Thursday":["10 AM–3 PM"],"Tuesday":["10 AM–3 PM"],"Wednesday":["Closed"]}
NARDOS BUSINESS SERVICES LLC
★★★★★ (25 reviews)1128 W Mission Blvd F, Ontario, CA 91762
(909) 391-0077
Website: nardosservices.com
Hours: {"Friday":["11 AM–5 PM"],"Monday":["Closed"],"Saturday":["Closed"],"Sunday":["Closed"],"Thursday":["11 AM–5 PM"],"Tuesday":["11 AM–5 PM"],"Wednesday":["11 AM–5 PM"]}
Meza CPAs, Tax & Accounting
★★★★★ (23 reviews)3350 Shelby St #200, Ontario, CA 91764
(909) 279-0009
Website: meza.cpa
Hours: {"Friday":["9 AM–5 PM"],"Monday":["9 AM–5 PM"],"Saturday":["Closed"],"Sunday":["Closed"],"Thursday":["9 AM–5 PM"],"Tuesday":["9 AM–5 PM"],"Wednesday":["9 AM–5 PM"]}
Villa's Taxes
★★★★½ (22 reviews)2234 S Mountain Ave, Ontario, CA 91762
(909) 983-6442
Hours: {"Friday":["9 AM–4:30 PM"],"Monday":["Closed"],"Saturday":["Closed"],"Sunday":["Closed"],"Thursday":["9 AM–4:30 PM"],"Tuesday":["9 AM–4:30 PM"],"Wednesday":["9 AM–4:30 PM"]}
Reyes Bookkeeping & Income Tax
★★★★★ (15 reviews)931 W Holt Blvd Suite C, Ontario, CA 91762
(909) 984-0217
Website: reyes-incometax.com
Hours: {"Friday":["9 AM–8 PM"],"Monday":["9 AM–8 PM"],"Saturday":["10 AM–6 PM"],"Sunday":["Closed"],"Thursday":["9 AM–8 PM"],"Tuesday":["9 AM–8 PM"],"Wednesday":["9 AM–8 PM"]}
Rojas Enterprises - Maria Rojas Office
★★★★★ (14 reviews)214 S Euclid Ave, Ontario, CA 91762
(909) 986-6058
Hours: {"Friday":["10 AM–5 PM"],"Monday":["10 AM–5 PM"],"Saturday":["Closed"],"Sunday":["Closed"],"Thursday":["10 AM–5 PM"],"Tuesday":["10 AM–5 PM"],"Wednesday":["10 AM–5 PM"]}
LES Tax Services
★★★★½ (14 reviews)2665 E Riverside Dr suite d, Ontario, CA 91761
(909) 689-7081
Hours: {"Friday":["9 AM–8 PM"],"Monday":["9 AM–8 PM"],"Saturday":["9 AM–8 PM"],"Sunday":["9 AM–8 PM"],"Thursday":["9 AM–8 PM"],"Tuesday":["9 AM–8 PM"],"Wednesday":["9 AM–8 PM"]}
Marthas Income Tax
★★★★☆ (15 reviews)139 N Euclid Ave, Ontario, CA 91762
(909) 395-9258
Hours: {"Friday":["9:30 AM–6 PM"],"Monday":["9:30 AM–6 PM"],"Saturday":["10 AM–4 PM"],"Sunday":["Closed"],"Thursday":["9:30 AM–6 PM"],"Tuesday":["9:30 AM–6 PM"],"Wednesday":["9:30 AM–6 PM"]}
Jewels Taxes and Bookkeeping
★★★★★ (12 reviews)1945 E Riverside Dr #20, Ontario, CA 91761
(909) 773-1863
Website: jewelstaxes.com
Hours: {"Friday":["10 AM–5 PM"],"Monday":["10 AM–6 PM"],"Saturday":["10 AM–3 PM"],"Sunday":["Closed"],"Thursday":["10 AM–6 PM"],"Tuesday":["10 AM–6 PM"],"Wednesday":["10 AM–6 PM"]}
Mariette Felicie Martinez, EA
★★★★★ (11 reviews)2910 S Archibald Ave a617, Ontario, CA 91761
(909) 509-5887
Website: courses.masteryourbooks.com
Hours: {"Friday":["9 AM–5 PM"],"Monday":["9 AM–5 PM"],"Saturday":["Closed"],"Sunday":["Closed"],"Thursday":["9 AM–5 PM"],"Tuesday":["9 AM–5 PM"],"Wednesday":["9 AM–5 PM"]}
Panamericana Income Tax - Ontario
★★★½☆ (14 reviews)755 E Holt Blvd B, Ontario, CA 91761
(909) 740-8510
Website: panamericanaservice.com
Hours: {"Friday":["9 AM–6 PM"],"Monday":["9 AM–6 PM"],"Saturday":["9 AM–6 PM"],"Sunday":["10 AM–4 PM"],"Thursday":["9 AM–6 PM"],"Tuesday":["9 AM–6 PM"],"Wednesday":["9 AM–6 PM"]}
EAGLE TAX & NOTARY PUBLIC SERVICES
★★★★★ (9 reviews)615 N Euclid Ave Suite 102, Ontario, CA 91762
(909) 467-0702
Website: www.facebok.com/eagletaxservices
Hours: {}
SB CPA INC
★★★★★ (9 reviews)4345 E Lowell St STE G, Ontario, CA 91761
(866) 256-8167
Website: sbcpainc.com
Hours: {"Friday":["8:30 AM–5 PM"],"Monday":["8:30 AM–5 PM"],"Saturday":["Closed"],"Sunday":["Closed"],"Thursday":["8:30 AM–5 PM"],"Tuesday":["8:30 AM–5 PM"],"Wednesday":["8:30 AM–5 PM"]}
Corellia Finance & Tax
★★★★★ (9 reviews)2990 Inland Empire Blvd #114, Ontario, CA 91764
(909) 621-9718
Website: corelliacpa.com
Hours: {"Friday":["8:30 AM–5:30 PM"],"Monday":["8:30 AM–5:30 PM"],"Saturday":["Closed"],"Sunday":["Closed"],"Thursday":["8:30 AM–5:30 PM"],"Tuesday":["8:30 AM–5:30 PM"],"Wednesday":["8:30 AM–5:30 PM"]}
Offices of Arshad M. Farooq, JD, CPA
★★★★½ (5 reviews)118 W Holt Blvd, Ontario, CA 91762
(909) 238-5361
Hours: {"Friday":["9 AM–5 PM"],"Monday":["9 AM–5 PM"],"Saturday":["Closed"],"Sunday":["Closed"],"Thursday":["9 AM–5 PM"],"Tuesday":["9 AM–5 PM"],"Wednesday":["9 AM–5 PM"]}
Kelly Accounting & Associates
★★★★★ (4 reviews)1131 W 6th St #210, Ontario, CA 91762
(909) 687-7017
Website: www.kellyaccountingtax.com
Hours: {"Friday":["9 AM–7 PM"],"Monday":["9 AM–7 PM"],"Saturday":["Closed"],"Sunday":["Closed"],"Thursday":["9 AM–7 PM"],"Tuesday":["9 AM–7 PM"],"Wednesday":["9 AM–7 PM"]}
Burns Tax & Wealth Management
★★★★★ (4 reviews)1920 S Archibald Ave f, Ontario, CA 91761
(951) 734-5879
Website: burnstaxservice.com
Hours: {"Friday":["8 AM–6 PM"],"Monday":["8 AM–6 PM"],"Saturday":["8 AM–6 PM"],"Sunday":["Closed"],"Thursday":["8 AM–6 PM"],"Tuesday":["8 AM–6 PM"],"Wednesday":["8 AM–6 PM"]}
Regalado Raymond CPA
★★★★★ (3 reviews)515 N Laurel Ave, Ontario, CA 91762
(909) 988-6551
Hours: {"Friday":["9 AM–5 PM"],"Monday":["9 AM–5 PM"],"Saturday":["Closed"],"Sunday":["Closed"],"Thursday":["9 AM–5 PM"],"Tuesday":["9 AM–5 PM"],"Wednesday":["9 AM–5 PM"]}
Freedom Bookkeeping LLC
★★★★★ (2 reviews)209 E I St, Ontario, CA 91764
(909) 921-5656
Website: www.freedombookkeepingaccounting.com
Hours: {"Friday":["9 AM–6 PM"],"Monday":["9 AM–6 PM"],"Saturday":["Closed"],"Sunday":["Closed"],"Thursday":["9 AM–6 PM"],"Tuesday":["9 AM–6 PM"],"Wednesday":["9 AM–6 PM"]}
Mac Burney Jr Robert a CPA
★★½☆☆ (3 reviews)3595-1 Inland Empire Blvd #1120, Ontario, CA 91764
(626) 859-3444
Website: usccpa.net
Hours: {}
Joey's Income Tax and Accounting Services
★★½☆☆ (3 reviews)3200 E Guasti Rd #100, Ontario, CA 91761
(909) 456-8875
Hours: {"Friday":["7 AM–9 PM"],"Monday":["7 AM–9 PM"],"Saturday":["7 AM–9 PM"],"Sunday":["7 AM–9 PM"],"Thursday":["7 AM–9 PM"],"Tuesday":["7 AM–9 PM"],"Wednesday":["7 AM–9 PM"]}
James E. Hall, CPA
★★★☆☆ (2 reviews)3200 E Guasti Rd, Ontario, CA 91761
Hours: {"Friday":["Closed"],"Monday":["8 AM–5 PM"],"Saturday":["Closed"],"Sunday":["Closed"],"Thursday":["8 AM–5 PM"],"Tuesday":["8 AM–5 PM"],"Wednesday":["8 AM–5 PM"]}
Raul Marquez, CPA Accounting Office
★★★★★ (1 reviews)525 W Holt Blvd, Ontario, CA 91762
(909) 271-8026
Website: www.raulmarquezcpa.com
Hours: {"Friday":["9 AM–5 PM"],"Monday":["9 AM–5 PM"],"Saturday":["Closed"],"Sunday":["Closed"],"Thursday":["9 AM–5 PM"],"Tuesday":["9 AM–5 PM"],"Wednesday":["9 AM–5 PM"]}
Tax & Retirement Services
★★★★★ (1 reviews)2551 S Euclid Ave, Ontario, CA 91762
(909) 467-5433
Website: www.taxandretirementservices.com
Hours: {}
Ledger Mastery
★★★★★ (1 reviews)2023 Tam O'Shanter St, Ontario, CA 91761
(949) 295-3447
Website: www.ledgermastery.com
Hours: {"Friday":["8 AM–5 PM"],"Monday":["8 AM–5 PM"],"Saturday":["Closed"],"Sunday":["Closed"],"Thursday":["8 AM–5 PM"],"Tuesday":["8 AM–5 PM"],"Wednesday":["8 AM–5 PM"]}
Pangan Benjamin A CPA
★★★★★ (1 reviews)3100 E Cedar St STE 12, Ontario, CA 91761
(909) 732-4783
Website: bapangancpa.net
Hours: {"Friday":["9 AM–5 PM"],"Monday":["9 AM–5 PM"],"Saturday":["Closed"],"Sunday":["Closed"],"Thursday":["9 AM–5 PM"],"Tuesday":["9 AM–5 PM"],"Wednesday":["9 AM–5 PM"]}
GYL CPAs and Advisors
★★★★★ (1 reviews)4120 Concours St # 100, Ontario, CA 91764
(909) 948-9990
Website: www.gylcpa.com
Hours: {"Friday":["8 AM–2 PM"],"Monday":["8 AM–5 PM"],"Saturday":["Closed"],"Sunday":["Closed"],"Thursday":["8 AM–5 PM"],"Tuesday":["8 AM–5 PM"],"Wednesday":["8 AM–5 PM"]}
Eide Bailly
★★★★★ (1 reviews)901 Via Piemonte #450, Ontario, CA 91764
(909) 466-4410
Website: www.eidebailly.com/locations/ontario
Hours: {"Friday":["8 AM–5 PM"],"Monday":["8 AM–5 PM"],"Saturday":["Closed"],"Sunday":["Closed"],"Thursday":["8 AM–5 PM"],"Tuesday":["8 AM–5 PM"],"Wednesday":["8 AM–5 PM"]}
Tax Preparation, CPA, Financial Advisor, Medicare
★☆☆☆☆ (1 reviews)4375 E Lowell St Ste E, Ontario, CA 91761
(909) 360-4000
Website: thomashalsellcpa.com
Hours: {"Friday":["9 AM–9 PM"],"Monday":["9 AM–5 PM"],"Saturday":["9 AM–5 PM"],"Sunday":["9 AM–5 PM"],"Thursday":["9 AM–5 PM"],"Tuesday":["9 AM–5 PM"],"Wednesday":["9 AM–9 PM"]}
Rita C Hansen, CPA
1131 W 6th St #255, Ontario, CA 91762
(909) 983-3364
Website: ritachansencpa.com
Hours: {}
Accountant Partners Small Business Accountant - Ontario Location
2321 S Greenwood Pl, Ontario, CA 91761
(909) 404-9191
Website: accountantpartners.com/small-business-accountant-ontario
Hours: {"Friday":["Open 24 hours"],"Monday":["Open 24 hours"],"Saturday":["Open 24 hours"],"Sunday":["Open 24 hours"],"Thursday":["Open 24 hours"],"Tuesday":["Open 24 hours"],"Wednesday":["Open 24 hours"]}
Ferguson Duane F CPA
2000 S Grove Ave # 101, Ontario, CA 91761
(909) 773-0330
Hours: {}
Rammell & Company
3296 E Guasti Rd #130, Ontario, CA 91761
(909) 466-5800
Website: www.rammellcpa.com
Hours: {"Friday":["Closed"],"Monday":["8 AM–5 PM"],"Saturday":["Closed"],"Sunday":["Closed"],"Thursday":["8 AM–5 PM"],"Tuesday":["8 AM–5 PM"],"Wednesday":["8 AM–5 PM"]}
About CPAs in Ontario, CA
Finding a CPA in Ontario, California starts with understanding the local economy. Ontario is a major logistics hub, home to the Ontario International Airport and a dense network of warehouses and distribution centers. This creates unique financial needs for small business owners, trucking companies, and e-commerce operators who must navigate complex sales tax rules, multi-state filings, and inventory accounting.
A CPA in Ontario can help you stay compliant with both California’s aggressive tax agency (FTB) and federal requirements. Whether you own a logistics firm, work as a gig-economy contractor, or are planning for retirement, a local professional understands the cost of living and business expenses specific to the Inland Empire. They can also assist with entity structuring, payroll for seasonal workers, and tax planning to avoid surprises.
Use BeforeTaxUSA.com to compare qualified CPAs serving Ontario. Look for someone with experience in your industry—whether that’s logistics, real estate, or manufacturing—and verify their license through the California Board of Accountancy. A good CPA does more than file taxes; they help you make informed financial decisions year-round.
Frequently Asked Questions
What is the difference between a CPA and a regular accountant?
A CPA has passed the Uniform CPA Examination and met state licensing requirements, while a general accountant may not hold this credential. CPAs can represent you before the IRS, sign audit reports, and are held to strict ethical standards by their state board of accountancy.
How much does a CPA typically charge?
CPA fees vary by location and complexity. Simple individual tax returns typically cost $200-$500, while business returns can range from $500-$2,500 or more. Many CPAs also offer hourly consulting at $150-$400 per hour.
When should I hire a CPA instead of doing my own taxes?
Consider hiring a CPA if you are self-employed, own rental properties, have investment income, experienced major life changes like marriage or home purchase, or received an IRS notice. A CPA can often save you more in deductions than their fee costs.
BeforeTaxUSA.com is a free informational directory. Listings are compiled from publicly available data and do not constitute an endorsement or recommendation. Verify credentials, licensing, and reviews independently before engaging any professional. Listings appear in no particular order unless otherwise noted.
Business owners: to update or remove a listing, email [email protected].