An Accounting Firm in St. Louis Built for Small Business

Most St. Louis accounting firms are built for one of two things. Either they are the big-name regional shops that quote $20,000-a-year minimums and treat sub-$5M businesses like an afterthought, or they are the solo preparers who handle the April return and disappear until next March. There is a real gap in the middle. We built the firm to live in that gap.

Thompson Flaherty is an Illinois and Missouri-licensed CPA firm headquartered in the Metro East and serving small businesses across St. Louis, Clayton, the suburbs, and the broader region. We work as a year-round CPA partner. Get in touch to talk through what that would look like for your business.

What an Accounting Firm Actually Does for Small Business

Three categories of work. First, the books — monthly bookkeeping, payroll, and sales tax compliance. Second, the tax — annual returns, quarterly estimated payments, year-end planning, entity-structure decisions. Third, the strategy layer — cash forecasting, owner take-home planning, pricing math, and the conversations that change the trajectory of the business. A real accounting firm should be doing all three for you.

How a St. Louis Accounting Firm Should Price

Pricing should be a number, not a mystery. Tax return only (S-corp or LLC) runs roughly $1,200 to $3,500. Monthly bookkeeping is typically $400 to $1,500 a month based on transaction volume. A full year-round CPA relationship with bookkeeping, tax, and quarterly check-ins lands most St. Louis clients between $1,200 and $3,000 a month. We quote real numbers after a 30-minute intro call.

Where We Serve in the St. Louis Region

St. Louis city, Clayton, University City, Maplewood, Webster Groves, Kirkwood, Chesterfield, St. Charles County, and the inner suburbs. Most engagements are virtual, so the working relationship looks the same whether you are in CWE or out in O’Fallon.

Why Thompson Flaherty Is Different

You work with the same CPAs every year. The phone calls get returned. The off-season check-ins happen. The advice is for your business, not a template. And we will tell you honestly when something is not the right move, instead of selling you on whichever strategy carries the highest fee.

Industries We Work With

Professional service firms, healthcare and dental practices, real estate investors and small landlords, restaurants and hospitality, e-commerce and product businesses, trades and contractors, and small SaaS or tech startups. Generalist firm by design.

How to Start

Schedule a 30-minute intro call through our contact page. No cost, no pressure. We will tell you honestly whether Thompson Flaherty is the right firm for your business.

Related St. Louis Pages

St. Louis CPA: see /cpa-st-louis/. University City CPA: see /cpa-university-city/. Clayton tax accountant: see /tax-accountant-clayton/. St. Charles CPA: see /cpa-st-charles/.