H&R Block
★★★★½ (171 reviews)8610 Veterans Memorial Pkwy, O'Fallon, MO 63366
(636) 240-8964
Website: www.hrblock.com/tax-office-near-me/missouri/o-fallon/24130/?otppartnerid=9308&campaignid=pw_mcm_9308_9762&utm_medium=local
Hours: {"Friday":["9 AM–4 PM"],"Monday":["Closed"],"Saturday":["10 AM–4 PM"],"Sunday":["Closed"],"Thursday":["12–7 PM"],"Tuesday":["9 AM–4 PM"],"Wednesday":["Closed"]}
Liberty Tax
★★★★★ (153 reviews)2017 State Hwy K, O'Fallon, MO 63366
(636) 489-3925
Website: www.libertytax.com/14745
Hours: {"Friday":["Closed"],"Monday":["Closed"],"Saturday":["Closed"],"Sunday":["Closed"],"Thursday":["Closed"],"Tuesday":["Closed"],"Wednesday":["10 AM–6 PM"]}
Taxvantage | O'Fallon
★★★★½ (155 reviews)18 Piepers Glen Ct, O'Fallon, MO 63366
(636) 379-1500
Website: www.taxvantageadv.com
Hours: {}
Renaud & Co Investment Advisors
★★★★★ (57 reviews)763 W Terra Ln, O'Fallon, MO 63366
(636) 240-5055
Website: www.renaudandcompany.com
Hours: {"Friday":["8 AM–3 PM"],"Monday":["8 AM–4:30 PM"],"Saturday":["Closed"],"Sunday":["Closed"],"Thursday":["8 AM–4:30 PM"],"Tuesday":["8 AM–4:30 PM"],"Wednesday":["8 AM–4:30 PM"]}
THE OLD TAX HOUSE
★★★★½ (38 reviews)8810 Veterans Memorial Pkwy, O'Fallon, MO 63366
(636) 240-7706
Website: www.oldtaxhouse.com
Hours: {"Friday":["Closed"],"Monday":["9 AM–3 PM"],"Saturday":["Closed"],"Sunday":["Closed"],"Thursday":["9 AM–3 PM"],"Tuesday":["9 AM–3 PM"],"Wednesday":["9 AM–3 PM"]}
Tammy Campbell, CPA-Real Estate Agent, LUX Properties
★★★★★ (20 reviews)856 Waterbury Falls Dr #200, O'Fallon, MO 63368
(314) 614-3916
Website: www.tammyc.com
Hours: {"Friday":["12–6 AM","10 AM–12 AM"],"Monday":["10 AM–12 AM"],"Saturday":["12–6 AM","10 AM–12 AM"],"Sunday":["12–6 AM"],"Thursday":["12–6 AM","10 AM–12 AM"],"Tuesday":["12–6 AM","10 AM–12 AM"],"Wednesday":["12–6 AM","10 AM–12 AM"]}
Smith Tax Service
★★★★½ (20 reviews)111 Triad Center W, O'Fallon, MO 63366
(636) 240-1511
Website: smith-tax.com
Hours: {}
Thomas & Associates Llc
★★★★☆ (16 reviews)114 E Elm St #3, O'Fallon, MO 63366
(636) 281-2727
Hours: {}
Breneman & Gomez
★★★★★ (9 reviews)102 Crafton Dr, O'Fallon, MO 63366
(636) 978-0234
Hours: {}
Sederburg & Associates
★★★★½ (9 reviews)2434 State Hwy K K, O'Fallon, MO 63368
(636) 928-1040
Website: www.taxteam1040.com
Hours: {}
Wehde and Associates, LLC
★★★★★ (7 reviews)3926 MO-79, O'Fallon, MO 63366
(636) 699-9414
Website: wehdeandassociates.com
Hours: {"Friday":["7 AM–12 PM"],"Monday":["7 AM–4 PM"],"Saturday":["Closed"],"Sunday":["Closed"],"Thursday":["7 AM–4 PM"],"Tuesday":["7 AM–4 PM"],"Wednesday":["7 AM–4 PM"]}
A-Z Business Solutions LLC
★★★★★ (5 reviews)1299 Bryan Rd, O'Fallon, MO 63366
(855) 553-2665
Website: a-zbusinesssolutions.com
Hours: {"Friday":["9 AM–5 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–5 PM"]}
Taxes Etc
★★★½☆ (3 reviews)1349 Washingtons Crossing Dr, O'Fallon, MO 63366
(636) 240-7954
Hours: {}
House & Associates
1725 Davinci Dr, O'Fallon, MO 63368
(636) 379-3897
Website: www.houseassoc.com
Hours: {"Friday":["9 AM–4 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"]}
A-Z Business Solutions, Inc.
1008 Rock Creek Elementary School Dr, O'Fallon, MO 63366
(855) 553-2665
Website: a-zbusinesssolutions.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"]}
Wade Stables PC
327 Sonderen St, O'Fallon, MO 63366
(636) 978-1040
Website: www.wadestables.com
Hours: {"Friday":["Closed"],"Monday":["8 AM–4 PM"],"Saturday":["Closed"],"Sunday":["Closed"],"Thursday":["8 AM–4 PM"],"Tuesday":["8 AM–4 PM"],"Wednesday":["8 AM–4 PM"]}
Marshall CPA
225 S Main St #101, O'Fallon, MO 63366
(636) 630-1600
Hours: {"Friday":["10 AM–4 PM"],"Monday":["10 AM–4 PM"],"Saturday":["Closed"],"Sunday":["Closed"],"Thursday":["10 AM–4 PM"],"Tuesday":["10 AM–4 PM"],"Wednesday":["10 AM–4 PM"]}
About CPAs in O'Fallon, MO
O'Fallon, Missouri, is one of the fastest-growing cities in the state, with a strong mix of corporate offices, healthcare facilities, and small retail businesses. Whether you work for a large employer like Mastercard or run a local shop, managing your taxes can get complicated. A CPA in O'Fallon understands the local economic landscape—including state and city tax requirements—and can help you stay compliant while maximizing deductions.
You might need a CPA if you’re self-employed, own rental property, or recently moved to O’Fallon for a new job. They can also assist with tax planning for growing families, retirement savings, or business expansions. CPAs stay current on Missouri tax laws and can help you avoid costly mistakes on both state and federal returns.
BeforeTaxUSA.com makes it easy to find qualified CPAs in O’Fallon. Our directory lets you compare professionals based on experience and client reviews, so you can choose someone who fits your needs without the guesswork.
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].