Bookkeeping, Tax Preparation Support and Virtual CFO Services for St. Louis Businesses

The City of St. Louis charges businesses an earnings tax of 1% of the business's earnings. It reaches businesses located in the city and nonresident businesses that perform work or business activity there. A company with a physical location in the city but no employees still owes it, and nonprofits are exempt once they file a copy of their federal or state certificate with Form E-9. The airport doesn't count: Lambert International is outside the city's geographic boundaries, so a business located only there owes neither the earnings tax nor the payroll expense tax (Collector of Revenue, checked October 8, 2026).

The return is Form E-234, built on a three-factor formula of gross receipts, property including inventory, and payroll. Any one of the three in the city creates a filing duty, even for a business based elsewhere. Calendar-year returns are due April 15, or October 15 with an approved Form E-8 extension. An Annual Business 1099 Report (Form E-6 or Schedule G) is due March 1.

Voters kept the tax on April 7, 2026. Proposition E passed with 84.70% voting yes in the Board of Election Commissioners' final official results. The practical lesson for the books: record city-sourced receipts, property and payroll separately all year, and the three E-234 factors come straight off the ledger.

Employers with people working in the city withhold the 1% earnings tax from gross earnings and file Form W-10. A resident employer withholds on all employees, wherever they work. Separately, the employer pays the Payroll Expense Tax of 0.5% of gross compensation for work in the city, filed on Form P-10. Both are quarterly: April 30, July 31, October 31 and January 31, with the W-3 reconciliation and W-2 data due January 31. Late payments draw a penalty of 5% for each month or part of a month, up to 25%, plus interest at 1% a month.

State rules matter too. Missouri's minimum wage is $15.00 an hour for 2026, and under HB 567 it will no longer be adjusted for inflation. The same law repealed the earned paid sick time mandate as of August 28, 2025, though employers may still offer it. Per the state labor department, retail and service employers with annual gross income under $500,000 aren't required to pay the state minimum wage, though federal rules can still apply. The ledger needs a clear split between wages, city withholding and the employer's payroll expense tax.

The City Assessor requires personal property assessment lists by April 1 each year under state law, and business assets are part of that. A list not filed by April 1 is assessed at 10% above its value as a penalty. If April 1 falls on a weekend, the deadline moves to the next business day.

That date makes the fixed asset register a spring deliverable, not a year-end afterthought. The register has to show what the business owns, what was bought or disposed of during the year, and cost by class, in a form the assessor's list can be built from. Missouri's own corporate income tax is 4% for tax years beginning on or after January 1, 2020, and most corporate returns are due the 15th day of the fourth month after year end (Missouri Department of Revenue). Missouri LLCs file no annual report with the Secretary of State, so no state renewal fee sits on their calendar.

Missouri's state rate is 4.225%, and local layers decide the rest. The Department of Revenue's rate table for October through December 2026 lists a base rate of 9.679% in the City of St. Louis, against 7.738% in unincorporated St. Louis County. Special districts add more in some places, so the lookup runs by address. These are base rates for the places on this page:

Belleville in St. Clair County and Edwardsville in Madison County are on the Illinois side, where the Illinois Department of Revenue sets the rates. A seller with sales on both sides of the river keeps Missouri and Illinois liabilities in separate accounts, each tied to its own return.

The St. Louis metro takes in Madison and St. Clair counties in Illinois, and plenty of businesses straddle the river. Illinois taxes corporations at 7% of net income, with a separate Personal Property Replacement Tax of 2.5% for corporations and 1.5% for partnerships and S corporations, according to the Illinois Department of Revenue. Individuals pay 4.95%.

Employees who live in one state and work in the other raise withholding questions in both, so payroll needs each person's home and work address on file, and the credentialed preparer settles credits on the personal return. That's an area where payroll setup mistakes pile up quietly. Our Chicago page covers Illinois taxes in more detail, and the same ledger discipline applies here: one liability account per jurisdiction, with a calendar for each.

Healthcare and bioscience organizations in the Central West End and Clayton need research grants and clinical revenue kept apart from patient revenue, with restricted funds tracked by source. Brewers and food producers carry production inventory, packaging and co-packer billing, and their margin shows up in yield. River, rail and trucking operators moving freight along the Mississippi corridor need per-load costing, fuel tracking and equipment schedules.

Financial services and insurance firms need books that hold up under a regulator's or an investor's questions. Construction and trades firms need job costing and retainage tracking. Nonprofits, which are exempt from the city earnings tax once they file Form E-9, still need fund accounting and Form 990 support; see our nonprofit guide.

Federal dates come from IRS Publication 509. The city's March 1 report comes before any federal return, which catches businesses that only watch federal dates.

The Bureau of Labor Statistics' May 2025 estimates count 9,950 jobs in the bookkeeping, accounting and auditing clerk group (occupation code 43-3031) in the St. Louis, MO-IL metro, at a mean annual wage of $53,400 and a median of $49,970. Accountants and auditors number 13,610 jobs at a mean of $86,560. Financial managers, the nearest group to a controller or part-time CFO, number 7,190 jobs at a mean of $172,850.

Those are wages only. Add payroll tax, the city's payroll expense tax, benefits, software and the recruiting cycle, and the real cost runs higher. A Finbryn plan is a fixed monthly fee and works remotely. If you need someone in the building to handle paper and walk-ins, hire that person, and let a plan carry the books around them.

Documents travel through a secure client portal, and bank and card feeds connect into QuickBooks Online or Xero. The file stays in your name, and there's no St. Louis office to visit.

Essentials is $249 a month for up to $50,000 in monthly expenses. Growth is $549 a month up to $150,000. The pricing page lists the rest. Tax work is preparation support: schedules and workpapers are prepared for review and signature by the credentialed preparer, who signs and files the return, and the about page names the people. Start on the contact page with recent statements and a note on which city and state forms apply to you. The first close comes back reconciled, with an open-items list. For another central metro, see Dallas, or open the locations hub.