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"]}
Fernandez Income Tax
★★★★★ (174 reviews)115 W B St, Ontario, CA 91762
(909) 391-6737
Website: fernandezit.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"]}
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"]}
H&R Block
★★★★★ (83 reviews)2503 S Euclid Ave Unit E, Ontario, CA 91761
(909) 988-9333
Website: www.hrblock.com/tax-office-near-me/california/ontario/3984/?otppartnerid=9308&campaignid=pw_mcm_9308_9762&utm_medium=local
Hours: {}
Tax365
★★★★★ (73 reviews)720 N Archibald Ave c, Ontario, CA 91764
(909) 975-2775
Website: www.mytax365.com
Hours: {"Friday":["9 AM–7 PM"],"Monday":["9 AM–7 PM"],"Saturday":["9 AM–7 PM"],"Sunday":["Closed"],"Thursday":["9 AM–7 PM"],"Tuesday":["9 AM–7 PM"],"Wednesday":["9 AM–7 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":["Closed"],"Tuesday":["10 AM–6 PM"],"Wednesday":["Closed"]}
Mi Oficina Income Tax & Insurance
★★★★½ (52 reviews)1245 N Grove Ave a, Ontario, CA 91764
(909) 984-4900
Website: www.myofficeincometax.com
Hours: {"Friday":["10 AM–6:30 PM"],"Monday":["10 AM–6:30 PM"],"Saturday":["10 AM–3 PM"],"Sunday":["Closed"],"Thursday":["10 AM–6:30 PM"],"Tuesday":["10 AM–6:30 PM"],"Wednesday":["10 AM–6:30 PM"]}
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"]}
Bollman Consulting
★★★★★ (30 reviews)3281 E Guasti Rd 7th Floor, Ontario, CA 91761
(909) 231-8799
Website: www.bollmanconsulting.com
Hours: {"Friday":["12–6 AM","9 AM–12 AM"],"Monday":["9 AM–12 AM"],"Saturday":["12–6 AM"],"Sunday":["Closed"],"Thursday":["12–6 AM","9 AM–12 AM"],"Tuesday":["12–6 AM","9 AM–12 AM"],"Wednesday":["12–6 AM","9 AM–12 AM"]}
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"]}
1st CHOICE TAX PREPARATION
★★★★★ (23 reviews)700 N Mountain Ave #101, Ontario, CA 91762
(909) 983-8600
Website: www.facebook.com/1stTaxPrep
Hours: {"Friday":["Closed"],"Monday":["Closed"],"Saturday":["Closed"],"Sunday":["Closed"],"Thursday":["12–4 PM"],"Tuesday":["12–4 PM"],"Wednesday":["12–4 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"]}
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"]}
RFS Accounting and Taxes
★★★★★ (11 reviews)980 W 6th St suite 107, Ontario, CA 91762
(909) 714-0866
Website: ramirezfinancialservice.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"]}
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"]}
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"]}
Pondillo Tax Services
★★★★★ (4 reviews)2980 Inland Empire Blvd #114, Ontario, CA 91764
(909) 755-1000
Hours: {"Friday":["9 AM–5 PM"],"Monday":["9 AM–5 PM"],"Saturday":["9 AM–3 PM"],"Sunday":["Closed"],"Thursday":["9 AM–5 PM"],"Tuesday":["9 AM–5 PM"],"Wednesday":["9 AM–5 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"]}
SDDS Computer Accounting, Tax Preparation Service
★★★★★ (3 reviews)2139 E 4th St SPC 97, Ontario, CA 91764
(909) 987-2408
Website: sddscomputeraccounting.wordpress.com
Hours: {"Friday":["10 AM–8 PM"],"Monday":["10 AM–8 PM"],"Saturday":["10 AM–8 PM"],"Sunday":["Closed"],"Thursday":["10 AM–8 PM"],"Tuesday":["10 AM–8 PM"],"Wednesday":["10 AM–8 PM"]}
Merchants Bookkeeping
★★★★★ (3 reviews)516 N Laurel Ave, Ontario, CA 91762
(909) 983-0652
Website: merchantsbkg.com
Hours: {"Friday":["10 AM–3 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"]}
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"]}
Singh Tax & Accounting
★★★★★ (2 reviews)3200 E Guasti Rd Ste 100, Ontario, CA 91761
(844) 362-6660
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"]}
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"]}
M & D Professional Services
★★★☆☆ (2 reviews)642 E Francis St, Ontario, CA 91761
Hours: {"Friday":["10 AM–6 PM"],"Monday":["9 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"]}
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"]}
Exquisite Consulting Services LLC
★★★★★ (1 reviews)3400 Inland Empire Blvd, Ontario, CA 91764
(800) 780-3306
Website: www.exquisiteconsultingservices.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"]}
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: {}
Ros Ta's Income Tax
★★★★★ (1 reviews)506 E Holt Blvd, Ontario, CA 91761
Hours: {}
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"]}
DANIEL ALPINO BUSINESS SOLUTIONS
★★★★★ (1 reviews)980 W 6th St Suite 104, Ontario, CA 91762
(714) 280-3657
Website: www.dabusinessolutions.com
Hours: {"Friday":["4:30–7:30 PM"],"Monday":["Closed"],"Saturday":["2–6 PM"],"Sunday":["Closed"],"Thursday":["4:30–7:30 PM"],"Tuesday":["4:30–7:30 PM"],"Wednesday":["Closed"]}
De Koekkoek David
★★★★☆ (1 reviews)2551 Euclid Ave, Ontario, CA 91762
(909) 467-5433
Website: www.taxandretirementservices.com
Hours: {}
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"]}
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: {}
QuickBooks Payroll
400 W Holt Blvd, Ontario, CA 91762
(833) 659-9010
Hours: {}
About Accountants in Ontario, CA
Finding a qualified accountant in Ontario, California means working with a professional who understands the local economic landscape. Ontario is a major logistics and distribution hub, home to the Ontario International Airport and a large concentration of warehouses, transportation companies, and manufacturing firms. This business activity creates specific tax and financial needs, whether you run a small trucking operation, manage a retail store, or work as an independent contractor in the Inland Empire.
Residents and business owners in Ontario often seek an accountant for help navigating state and local tax requirements, especially with California’s complex sales and use tax rules. Accountants can also assist with payroll for seasonal workers, business entity structuring, or personal tax planning if you’ve recently bought a home or started a side gig. A local professional will be familiar with the regional economy and can offer practical advice tailored to your situation.
Frequently Asked Questions
What services does an accountant provide?
Accountants typically offer bookkeeping, financial statement preparation, tax planning and preparation, payroll services, accounts payable and receivable management, and general financial consulting for both individuals and businesses.
How do I choose the right accountant?
Look for an accountant with experience in your industry or tax situation, check their credentials and references, ask about their availability during tax season, and make sure they use modern accounting software. A good accountant should be proactive about finding deductions and keeping you compliant.
What is the difference between an accountant and a bookkeeper?
A bookkeeper records daily financial transactions, while an accountant analyzes financial data, prepares tax returns, and provides strategic financial advice. Many accounting firms offer both services, with bookkeepers handling the day-to-day work and accountants overseeing the bigger financial picture.
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 info@beforetaxusa.com.