Forming an LLC in Missouri · St. Louis
Forming an LLC in Missouri: the Filing, the Agent and What Comes Next
To form an LLC in Missouri, you file articles of organization with the Missouri Secretary of State. You also name a registered agent with an address in Missouri. The state’s fee list shows $50 to file online and $105 on paper. After that come your operating agreement, tax choices and a company bank account.
What the articles of organization must say
The articles of organization are the short form that creates your LLC. Missouri law (RSMo 347.039) says they must list:
- The name of your LLC.
- Its purpose. You can simply write “the transaction of any or all lawful business.”
- The street address of the registered office and the name of the registered agent.
- Whether managers or members run the company.
- The events that end the company, or how many years it will last.
- The name and street address, business or home, of each organizer. The organizer is the person who files the form.
You may add other terms, but most owners keep the articles short. Anyone can look them up. Your operating agreement stays private. That is the better place for money, voting and ownership terms.
$50 online · $105 paper
The state fee to file articles of organization for a Missouri LLC, from the Missouri Secretary of State’s current fee list. Paying online adds a separate convenience fee. Check the fee on sos.mo.gov before you file.
The registered agent is not a formality
Every Missouri LLC must always have a registered office and a registered agent in the state. The agent is the person who accepts lawsuits, subpoenas and state notices for your company.
Here is what happens if you let it slip. If your company has no agent and no one can be found, the Secretary of State becomes your agent by law. The state then mails the papers to an organizer’s address on file. If that address is old, someone could sue your company and you might never know.
You can be your own agent. So can an employee or a paid agent service. The agent must be reliable, have a Missouri street address, and pass papers along the day they arrive. If the agent or the address changes, file the change with the Secretary of State.
Member-managed or manager-managed
Your articles must say who runs the company. In a member-managed LLC, the owners, called members, run it. In a manager-managed LLC, one or more managers run it. The operating agreement names them, or the members elect them. A manager does not have to be an owner unless your agreement says so.
Two owners who both work in the business usually pick member-managed. A company with silent investors often picks manager-managed. So does a company where one founder runs things while family members own shares. This choice decides who can sign contracts for the company. Pick the one that matches how you really run things.
What limited liability protects, and what it does not
Missouri law says a member or manager is not liable for the company’s debts “solely by reason of being a member or manager.” The word “solely” matters. You are shielded from debts that come only from being an owner. You are not shielded from debts you take on yourself.
- A personal guaranty on a lease, a loan or a supplier account means you pay if the company cannot. Missouri requires that kind of promise to be in a signed writing. That is exactly what a lender or landlord will ask you to sign.
- A contract you sign in your own name, not as the company’s manager or member, may bind you.
- Mixing personal and company money makes it harder to show the company is separate from you. Open a company bank account and use it.
Federal owner reporting (FinCEN) after March 2025
A federal law once made most new LLCs report their owners to FinCEN. FinCEN is the Treasury Department office that fights financial crime. In March 2025, FinCEN issued an interim final rule. It exempts all companies created in the United States, and their owners, from that report. Under the current rule, a Missouri LLC formed today does not file it.
The rule still applies to foreign companies registered to do business in the United States. This area has changed more than once. So the firm checks FinCEN’s current guidance each time it forms a company.
The first ninety days after filing
- Sign an operating agreement, even if you are the only owner. Missouri law says the members “shall adopt” one. See operating agreements.
- Get an employer identification number (EIN) from the IRS. Then open a company bank account.
- Decide with your CPA how the company will be taxed.
- Check city and county business license rules where you work.
- Move contracts, leases and supplier accounts into the company’s name. Sign as manager or member, not as yourself.
- If you have co-owners, decide now what happens when one leaves. See buy-sell agreements.
Harjot Singh Padda, JD, handles a formation as a package. You get the articles, the operating agreement, and a short plain-English memo on the choices you made and why. Mr. Padda can also review an LLC you set up online years ago that never got an operating agreement.
Common questions
Can I be my own registered agent in Missouri?
Yes, if you keep a Missouri street address and are reliably there to receive papers. If the agent lapses, the Secretary of State becomes the agent by law. Other upkeep is covered in governance and compliance.
Do I need an operating agreement for a single-member LLC?
Missouri law tells the members to adopt one. A single owner also gains a written record that the company is separate. See operating agreements.
Should I form an LLC before signing a commercial lease?
Usually yes, so the lease is in the company’s name. Expect the landlord to ask for a personal guaranty anyway. See commercial leases.
Should an LLC hold my business real estate?
Many owners put real estate in a separate LLC from the operating business. The trade-offs are covered in commercial real estate transactions.
Does a Missouri LLC have to report its owners to FinCEN?
Not under FinCEN’s March 2025 interim final rule, which exempts companies created in the United States. The firm checks the current rule at formation. Questions to bring are on the consultation checklist.
Related reading
Schedule a business consultation about your new company
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4477 Woodson Rd
St. Louis, MO 63134
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Sources
- Mo. Rev. Stat. § 347.039 (contents of articles of organization). Missouri Revisor of Statutes
- Mo. Rev. Stat. § 347.030 (registered office and registered agent). Missouri Revisor of Statutes
- Mo. Rev. Stat. § 347.033 (service of process on a limited liability company). Missouri Revisor of Statutes
- Mo. Rev. Stat. § 347.079 (management of a limited liability company). Missouri Revisor of Statutes
- Mo. Rev. Stat. § 347.057 (liability of members and managers). Missouri Revisor of Statutes
- Mo. Rev. Stat. § 347.081 (operating agreement). Missouri Revisor of Statutes
- Mo. Rev. Stat. § 432.010 (statute of frauds). Missouri Revisor of Statutes
- Missouri Secretary of State, Corporations Division, Schedule of Fees and Charges. Missouri Secretary of State
- Mo. Rev. Stat. § 347.179 (filing fees). Missouri Revisor of Statutes
- FinCEN, Beneficial Ownership Information Reporting (interim final rule of March 2025 exempting entities created in the United States). Financial Crimes Enforcement Network