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RCS Tax Group
- Team
- Office
- Respect
“It was my first year that I went with Lucy, I liked her kindness and her experience in filing taxes, she explained each step and why and how much the money they were going to return was.”
Best Tax Preparation Services in Ontario, CA
24 companies listed · 22 in Ontario · 12 open weekends · 21 rated 4.5+ · 1 shows a license
Data verified October 18, 2026
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Tax Care
- Fee
- Tax Return
- Polite
“I love the service and the way they explaine every single thing for me I have great experience with tax care I would like you to try you will get the best .”
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Aida Real Professional Services
- Paralegal
- Questions
- Notarized
“I filed taxes with Aida 2010, 2011, but 2012 I switched tax preparer because I moved 35 miles away, however, I came back to file 2013 because Aida is a truly professional, honest tax return preparer, her fees are reasonable, and always provide me wit...”
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Fernandez
- Stress
- Questions
“Pedro torres really helped us, he talked to us and explained all the options we had, he took his time and walked us through the process giving us helpful tips for the next year!”
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Mi Oficina
- Prices
- Team
- Refund
“They have everything you need from Taxes, life insurance, real estate, and loans so if you need a service definitely stop by and have any questions definitely ask them the service is great so come by.”
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One Stop Tax Services
The 24 companies listed for Ontario, CA prepare and file tax returns for individuals and small businesses. What each says about its services and credentials comes from its own website; ratings and quotes come from public reviews.
Area overview: Ontario, CA
Of the 24 companies we list here, 22 are in Ontario itself and 2 come from Corona (13 mi). 23 of the companies on this page have a rating, from 4.1 to 5.0 across 739 reviews; 3 have 50 or more reviews and 21 are rated 4.5 or higher. When clients rate these companies on specific qualities, they most often praise professionalism (96%), quality (76%) and responsiveness (76%). 12 are open on Saturdays and 2 on Sundays. The services the companies on this page list most often on their websites are tax planning (3), bookkeeping (2), individuals (2) and view services page (2). 1 shows a license on its website and 11 have a BBB rating of A or A+. Domain records put 6 websites of the companies on this page at ten or more years old; the oldest dates from 1999. 2 offer a free initial consultation; 2 are family- or locally-owned and 1 lists coupons or special offers. 1 has Spanish-speaking staff. We count these figures across the companies on this page; distances are straight-line, and hours and prices change, so confirm the details with the company before you book a consultation.
Are any tax preparers listed for Ontario open on Saturdays or Sundays?
12 of the 24 companies list weekend hours. Extended and weekend opening is common through the filing season and disappears afterward, so the hours shown here may not match what you find in the quiet part of the year. Call before you travel.
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Alma's Accounting & Tax Services
“Alma is amazing her and staff are very friendly and professional I have gone to her for years I highly recommend Almas Tax Service to everyone she does above and beyond Thank you for all you do”
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Latino's Tax Services
- Questions
“Excellent job thank you wendy no one like you to help me with my identity theft problem to do my taxes it is a problem when that happens thank you wendy and everyone who works there I love them for being kind”
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Enriquez
“Not only did I get that done she also helped me fill out all my paperwork and took the time to explain in detail before signing which she did not have to do.”
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Xel Advisors
- Questions
- Paying
- Information
“I didn't have to worry about anything- the pricing was great, the service was quick, and they helped me get the best return with all the pending covid relief programs.”
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Hongda Tax and Accounting Services
- Questions
- Work
“Everything was fairly quick, I was asked a few questions, provided advice on things to change on our W4, and told how much I would get back and what I owed”
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Corellia Finance & Tax
“So if you're a business owner, real estate investor, and/or you need your personal or business taxes done, you most definitely want the expertise of Corellia Finance & Tax.”
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Patriot Tax Services
- Stress
“After years of being lost and barely filing taxes through Turbo Tax, and owing hella money with little to no returns; we finally decided to get taxes done right and go with Claudia and her team.”
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Meza CPA Tax & Accounting
- Tax Preparer
- Tax Planning
- Questions
“I recently had a fantastic consultation with him where he provided a clear and comprehensive outline on how to manage, structure, and prepare for the upcoming tax season for my business.”
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Vallarta Express Tax Services
“I love this place and highly recommend them to anyone looking for a quick cheap meal thats super filling.”
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We Care Tax
- Questions
- Money
- Tax Refund
“I sent my taxes Sunday the day before the Tax deadline and she had them done on Monday afternoon with the maximum amount of refund I could get.”
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Villa's Taxes
- Estimate
- Charge
“For a small charge once they review your W2 they will tell you how much you will receive or possibly owe 🤷, when you're dealing with your finances you must invest to receive, you can not expect to get an free estimate, we have to respect everyone's v...”
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Exquisite Consulting Services
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GYL Cpas and Advisors
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Cloud Bookkeeping
“If you need a great Accountant with excellent skills, and a helpful heart.”
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Island Tax Service
- Price
“Have been going here for years.”
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Elaine's Tax Services
- Tax Preparer
“Great tax service I've been going to her for over ten years.”
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Regalado Raymond CPA
“At first stay, a very focused, regal, human person, provides confidence with good moral principles.”
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LES Tax Services
“Grate service i totally would recommend this place 👍 …”
Tax Preparation & Planning Services in Ontario, CA Cost Estimates
Minimum cost
$303
Maximum cost
$3030
National Average
$546
Avg Per Hour Rates
$289
$364
$788
Typical price range is based on 389 cost profiles
Why these companies made our list
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