To start an LLC in Missouri, file articles of organization (Form LLC 1) with the Secretary of State for $50 online or $105 by mail, after choosing a compliant name and appointing a registered agent with a Missouri street address. Once the state accepts your filing, your LLC exists as a legal entity, and the remaining work is internal governance, tax setup, and keeping up with ongoing reports.
Pick a Name That Meets Missouri’s Rules
Your name has to include one of the approved designators: “Limited Liability Company,” “Limited Company,” or an abbreviation such as LLC, L.L.C., LC, or L.C. It cannot include words that suggest another entity type, like “corporation,” “incorporated,” or “limited partnership.”1Missouri Revisor of Statutes. Missouri Code 347.020 – Name of Company Regulated The name also has to be distinguishable from every other corporation, LLC, and limited partnership already on file with the Secretary of State.
Search the Secretary of State’s online business database to check availability. If the name you want is free but you’re not ready to file, you can reserve it for 60 days for $25, and renew that reservation twice for up to 180 days total.2Missouri Secretary of State. Frequently Asked Questions – Corporations3Missouri Secretary of State. Schedule of Fees and Charges
Appoint a Registered Agent
Every Missouri LLC must continuously maintain a registered agent in the state to accept legal documents and official notices. The agent can be an individual who lives in Missouri and keeps a business office at the registered address, or a domestic or foreign business entity authorized to operate in Missouri.4Missouri Revisor of Statutes. Missouri Code 347.030 – Maintenance of Office and Agent for Service of Process
The registered office must be a physical street address. A P.O. box alone doesn’t qualify. You can serve as your own agent if you have a Missouri street address, or hire a commercial service, which usually runs $100 to $300 per year. The agent’s address becomes part of the public record either way.
File the Articles of Organization
The articles of organization, filed on Form LLC 1, are what legally create the LLC. Missouri law requires six pieces of information in the filing:5Missouri Revisor of Statutes. Missouri Code 347.039 – Articles, Contents
- The LLC’s full legal name, including an approved designator.
- The business purpose, which can be as broad as “any lawful business.”
- The street address of the registered office and the name of the registered agent there.
- Whether the LLC will be member-managed (all owners participate in decisions) or manager-managed.
- The LLC’s duration, most commonly listed as perpetual.
- The name and physical address of each organizer. Organizers don’t have to be members or owners.6Missouri Secretary of State. LLC 1 – Articles of Organization
You can submit through the Secretary of State’s online filing system or mail a paper copy. Online filing costs $50; paper filing costs $105.3Missouri Secretary of State. Schedule of Fees and Charges If your LLC has more than five organizers, you have to file on paper, because the online system caps organizers at five.7Missouri Secretary of State. Registering a Limited Liability Company – Step-by-Step Guide
Your LLC exists the moment the Secretary of State files the articles, unless you specify a later effective date up to 90 days out. The stamped copy of your articles is conclusive proof the LLC has been formed.8Missouri Revisor of Statutes. Missouri Code 347.037 – Articles, Filing, Fee Online submissions are usually processed the same day; mailed forms take several business days.
Draft an Operating Agreement
Missouri law requires every LLC to adopt an operating agreement, even single-member ones.9Missouri Revisor of Statutes. Missouri Code 347.081 – Operating Agreement, Contents You don’t file it with the state. It’s a private contract among the members, and it governs how the company actually runs.
A workable operating agreement usually covers:
- Each member’s ownership percentage.
- How profits and losses are allocated, which doesn’t have to mirror ownership percentages.
- Voting rights and the thresholds needed to approve major decisions.
- Who handles day-to-day management, especially in a manager-managed LLC.
- Procedures for adding members, handling departures, or transferring interests.
- How the company will wind down if the members decide to close it.
Without one, default rules under the Missouri Limited Liability Company Act fill the gaps, and those defaults may not match what you and any co-owners actually want. For a single-member LLC, having an operating agreement also helps show the business operates as a separate entity from you personally, which supports your liability protection.
Get an EIN From the IRS
Once the state has formed your LLC, apply to the IRS for an Employer Identification Number. The EIN is a nine-digit tax ID for the business. Banks require it to open a business account, and you need it to hire employees or file certain tax returns. Applying is free, you can do it online, and the IRS issues the number right away.10Internal Revenue Service. Get an Employer Identification Number Third-party sites that charge for this are selling you nothing the IRS doesn’t give out for free.
Register for Missouri Taxes if They Apply
If your LLC will collect sales tax, sell taxable products, or have employees, register with the Missouri Department of Revenue. Its online portal lets you sign up for several tax types in one session, including sales tax, vendor’s use tax, consumer’s use tax, withholding tax, and corporate income tax.11Missouri Department of Revenue. Online New Business Registration
Not every LLC needs this step. A solo consultant with no products to sell and no employees may be fine with just a federal EIN. But if there’s any chance you’ll collect sales tax or hire workers, register early rather than face late-compliance penalties.
Choose How the LLC Is Taxed Federally
The IRS doesn’t have a single tax category called “LLC.” It assigns a default classification based on how many members you have, and you can elect something different if it saves money.12Internal Revenue Service. Single Member Limited Liability Companies
- A single-member LLC is a “disregarded entity” by default. Business income and expenses flow onto your personal return, and the LLC doesn’t file its own federal return.
- A multi-member LLC is taxed as a partnership by default. The LLC files Form 1065 as an informational return, and each member reports their share of income personally.
- Any LLC can file Form 8832 to be taxed as a C corporation, or Form 2553 to be taxed as an S corporation.
The S corporation election is popular with LLC owners whose profits are high enough that self-employment tax starts to sting. To have S corporation treatment apply to the LLC’s first tax year, file Form 2553 within two months and 15 days of when the LLC begins operating, acquires assets, or takes on members, whichever happens first.13Internal Revenue Service. Instructions for Form 2553 Miss that window and the election waits until the following tax year.
Stay in Good Standing After Formation
Forming the LLC isn’t the end. Missouri has ongoing obligations, and falling behind puts your good standing — and sometimes the LLC’s existence — at risk.
Periodic Registration Reports
Missouri LLCs must file periodic registration reports with the Secretary of State, either annually or, for some LLCs, biennially. Filing online costs less than mailing a paper form.14Missouri Secretary of State. Annual and Biennial Registration Reports If your LLC stops filing reports or lets its registered agent lapse, the Secretary of State can cancel your articles of organization and effectively dissolve the company.4Missouri Revisor of Statutes. Missouri Code 347.030 – Maintenance of Office and Agent for Service of Process
Local Licenses and Permits
State registration doesn’t cover city or county licensing. Many Missouri municipalities require a general business license, and home-based businesses often need a home occupation permit with restrictions on signage, client visits, and how much of the home is used for business.15Missouri Secretary of State. Steps for Starting a Business Call your city or county clerk’s office to confirm what applies to your location and industry.
Workers’ Compensation Insurance
Missouri requires employers to carry workers’ compensation insurance once they reach five or more employees. Construction businesses face a tougher threshold and need coverage with even one employee. LLC members are presumed covered unless they affirmatively opt out.16Missouri Department of Labor and Industrial Relations. Does an Employer Have to Carry Workers’ Compensation Insurance
Beneficial Ownership Reporting
You may have read about a federal requirement to report beneficial ownership information to FinCEN. Under an interim rule published in March 2025, domestic entities (including Missouri LLCs) are exempt. Only entities formed under foreign law and registered to do business in the United States currently need to file.17FinCEN. Beneficial Ownership Information Reporting
Keep the Liability Shield Intact
The reason to form an LLC in the first place is usually to keep personal assets separate from business debts. That shield isn’t automatic. If you treat the LLC’s money as your own, a court can “pierce the veil” and hold you personally liable for business obligations.
The quickest way owners lose protection is mixing personal and business finances: paying personal bills from the business account, running business income through a personal account, or keeping no real books. To preserve the separation:
- Open a dedicated business bank account and use it only for LLC transactions.
- Keep accurate records that distinguish business income and expenses from personal ones.
- Follow your operating agreement, document major decisions, and hold any required votes.
- Sign contracts in the LLC’s name, with your title (“Member” or “Manager”) shown, so the other party knows they’re dealing with the entity.
None of this costs anything, and it’s what makes the liability protection hold up if it’s ever tested.