Accounting Firm

Brian G. Toennies & Associates

St. Louis area accounting firm handling tax, bookkeeping, payroll and planning for individuals and small businesses

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TrustList summary

Brian G. Toennies & Associates is an accounting firm in O'Fallon, Illinois, working mainly with clients in greater St. Louis and the Illinois metro-east. Brian Toennies holds licences in both Missouri and Illinois, and the practice covers personal and small business tax as well as wider financial planning.

What Brian G. Toennies & Associates offers

Individual tax: income tax planning and preparation, including bringing overdue filings up to date.
Business tax and bookkeeping: tax work, interim bookkeeping, payroll support and payroll tax returns.
Financial statements: year-end compilations, reviews and audits, plus projections.
Valuations and retirement plans: valuing closely held businesses and setting up and reporting on retirement plans.
New business support: business plans, accounting system setup and projections for new ventures.
IRS matters: guidance and representation when clients face IRS audits or disputes.

Clients

The firm serves individuals, families and small businesses, and it helps families with retirement and estate planning.

Key facts

Based in: O'Fallon, Illinois
Licences: Missouri and Illinois
Area served: greater St. Louis and metro-east Illinois

Summary written by TrustList from the business's own published information, Sep 2026.

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Categories & features

Rankings

Brian G. Toennies & Associates is ranked on 1 TrustList ranking at #30.

Every ranking orders its listings by their reviews, how complete the profile is and the Trust Score. Brian G. Toennies & Associates has no reviews yet and 2 of the 10 profile details we look for. Where no listing on a page has been reviewed, the order follows the profiles alone.

Accounting firm · 1 ranking

#30of 26
Illinois
It is one of 28 here listing accounting and one of 29 here listing tax.
Its profile: “Toennies & Associates is an accounting firm in O'Fallon, Illinois, working mainly with clients in greater St.”
Of the 26 here, 29 also cover tax and 28 also cover accounting; 4 also work in Indiana and 3 also work in Michigan.
Behind Bradford Allen Realty Services, ahead of Bryant & DaValle PC.

As of 2026-10-31. Organic ranks only; sponsored placements are never ranks. How TrustList ranks