Pen, notebook and reading glasses on a wooden table, Missouri Business Taxes Explained for New Owners

Missouri Business Taxes Explained for New Owners

Last verified: November 4, 2026

Missouri has no franchise tax on corporations, a flat 4% corporate income tax, a 4.225% state sales tax and an unemployment tax that only starts once you cross a wage threshold. What you owe mostly depends on whether you sell goods, hire people and how your entity is taxed. This guide takes those in the order you will meet them.

Choose Your Entity, Choose Your Tax Structure

The structure you file with the Secretary of State is separate from how the IRS taxes you. Pick the filing first, then decide whether a tax election makes sense.

Limited Liability Companies (LLCs)

An LLC costs $50 to form online ($105 on paper) with the Missouri Secretary of State, and Missouri LLCs file no annual report (see the Missouri Secretary of State business FAQ). Our Missouri LLC guide covers the filing steps.

By default, a single-member LLC is taxed as a sole proprietorship and a multi-member LLC as a partnership. Profit passes through to you and you report it on your personal returns. No separate entity-level income tax applies unless you elect corporate treatment.

You can elect S-corporation or C-corporation treatment with the IRS. A C-corporation pays Missouri's flat 4% corporate income tax on profit, and you are taxed again on dividends you take out. That double layer is why most small businesses do not choose C-corporation treatment.

Corporations (C-Corps and S-Corps)

A Missouri corporation with authorized capital of $30,000 or less pays $58 to form, and then files an annual registration report for $20 online or $45 on paper, due at the end of the month in which it incorporated (Missouri Secretary of State: corporation general information). The Missouri corporation guide has the full filing walk-through.

A C-corporation pays Missouri corporate income tax at a flat 4% for tax years beginning on or after January 1, 2020 (RSMo 143.071). Missouri's franchise tax on corporations ended in 2016 (RSMo 147.010).

An S-corporation is a federal election made on IRS Form 2553, on top of a corporation or LLC you have already formed. Profit passes through to the owners. The tradeoff is that owner-employees must be paid a reasonable salary, and payroll taxes apply to that salary (IRS: S corporation compensation). The election usually pays only when profit is well above a reasonable salary for the work; a CPA can run the numbers for your figures.

Individual Income Tax on Pass-Through Profit

If you operate as a sole proprietor, partnership, S-corporation or default LLC, your share of the profit is taxed on your personal Missouri return, together with any other income in your household. Missouri uses graduated brackets, and the top rate was cut from 6% to 4.95% for tax years beginning in 2023. Further reductions of 0.10 percentage points a year can apply, but only when state revenue tests are met, so the top rate for a given year has to be confirmed rather than assumed (RSMo 143.011).

Check the current-year rate on the Missouri Department of Revenue individual income tax page before you set estimated payments. For the owner-level view, read Missouri income tax for business owners.

Sales Tax: Who Collects It and When

If you sell tangible personal property or certain taxable services in Missouri, you register with the Department of Revenue, collect sales tax at the point of sale and remit it. The state rate is 4.225%, and cities, counties and districts add their own, so your total depends on where the sale happens (Missouri Department of Revenue: sales and use tax).

Services are taxable only if the statute lists them. The Department of Revenue keeps a taxable services FAQ on its site; ask the department in writing if your service is not clearly covered, because tax assessed after the fact costs more than a question asked beforehand.

Payroll Taxes and Withholding

Three separate payroll obligations apply once you have employees: federal payroll tax, Missouri income tax withholding and Missouri unemployment tax. They start at different points.

  • Withholding: you withhold Missouri income tax from wages and file the MO-941 withholding return. The Department of Revenue's withholding tax page links the Employer's Tax Guide (Form 4282) and the MO W-4 employees complete.
  • Unemployment tax: a general business becomes liable when it pays $1,500 in wages in a calendar quarter, or has a worker on some part of a day in 20 different weeks of a year. Hiring one person does not by itself make you liable. Register within 30 days of becoming liable (Missouri Division of Employment Security: employer liability).
  • New employer rate: 2.376% for 2026 for most new employers (1.00% for 501(c)(3) nonprofits), on a taxable wage base of $9,000 per employee (Missouri Division of Employment Security: tax rates).
  • Federal: you need an EIN, which the IRS issues free (IRS: apply for an EIN online). Our Missouri EIN guide explains when you need one.

If you are a sole proprietor or single-member LLC with no employees, you still owe self-employment tax to the IRS on Schedule SE. That is a federal tax; Missouri has no separate self-employment tax.

Estimated Quarterly Taxes

If no tax is withheld from your business income, you generally pay estimated tax during the year. Federally, individuals use IRS Form 1040-ES, and the year is split into four payment periods; the IRS lists the due dates. Most taxpayers avoid the underpayment penalty if they pay at least 90% of the current year's tax or 100% of the prior year's tax, whichever is smaller. Higher-income taxpayers have special rules in IRS Publication 505.

Missouri has its own estimated payment voucher for individuals (Form MO-1040ES), so confirm dates and the Missouri form on the Department of Revenue site rather than copying the federal schedule.

Local Taxes Beyond the State

Two local layers surprise new owners. Kansas City and St. Louis levy an earnings tax on income earned there, covered in Kansas City and St. Louis earnings tax. Counties tax business equipment as personal property, covered in Missouri business personal property tax.

Record-Keeping and Documentation

Keep income, expense, invoice, receipt, payroll and tax return records. The IRS's general minimum is three years for most returns, and Missouri audits work from the same records, so every deduction and income figure needs paper behind it. Set up bookkeeping on day one rather than reconstructing transactions later.

Working with a Tax Professional

This guide is informational and is not tax or legal advice. A CPA or tax professional licensed in Missouri can choose the entity structure and S-corporation election for your numbers, set up payroll and sign your returns. Hire one before you elect S-corporation status, not after.

Sources

Disclaimer

This article is informational only and does not constitute legal, tax or accounting advice. Tax laws change and apply differently to each business. Before making decisions about your business structure or tax filings, consult a qualified tax professional or attorney licensed in Missouri.

Keep exploring: related Missouri guides