Single-Member LLC in Missouri (2026)

Fact-checked by the LegalGlass editorial team against primary sources · Published Aug 6, 2026 · Last updated Aug 6, 2026

A Missouri single-member LLC is a disregarded entity by default: the IRS ignores it for income tax and the owner reports profit on a personal return. You create one by filing Articles of Organization with the Missouri Secretary of State for a $50 online fee. Missouri LLCs file no annual report, but you must keep a registered agent.

Quick Answer

Formation
File Articles of Organization with the Missouri Secretary of State
Filing fee
$50 online (2026); higher for paper filing
Federal tax
Disregarded entity by default (income on owner's return)
EIN
Free from the IRS; required if employees, excise/employment tax, or corporate election
Registered agent
Required - Missouri registered office, must consent
Annual report
None required for Missouri LLCs

What Is a Single-Member LLC in Missouri?

A single-member LLC (SMLLC) in Missouri is a limited liability company with exactly one owner, called a member. Like any Missouri LLC, it is a legal entity separate from its owner, formed under the Missouri Limited Liability Company Act (Missouri Revised Statutes Chapter 347). That legal separation is what gives the owner a liability shield that an informal sole proprietorship or DBA cannot provide.

The word "disregarded" causes most of the confusion. For federal income tax, the IRS disregards a single-member LLC as separate from its owner: there is no separate LLC income-tax return, and the profit or loss is reported on the owner's Form 1040, usually on Schedule C. But the LLC is still a real entity for state law, for liability, and for certain federal taxes. The IRS treats a single-member LLC as a separate entity for employment taxes and certain excise taxes, even while disregarding it for income tax. Understanding both halves of that rule is the key to running a Missouri SMLLC correctly. For the national picture, see how to form an LLC and the glossary of business terms.

Missouri is an attractive state for a single-owner LLC because it has no annual report requirement for LLCs, which keeps ongoing state paperwork and cost low. In exchange for a formal filing and a registered agent, the owner gains limited liability and a structure that banks, lenders, and clients take seriously. This guide covers formation, EIN, liability, the operating agreement, and Missouri state tax.

How to Form a Single-Member LLC in Missouri

Forming a Missouri SMLLC is the same process as forming any Missouri LLC and centers on the Articles of Organization. Each step below reflects a requirement of the Missouri Limited Liability Company Act or a federal tax rule.

  1. Choose and check your LLC name. Select a name that includes an LLC designator (such as "LLC," "L.L.C.," or "Limited Liability Company") and is distinguishable from names already on file. Search the Secretary of State business database first, and confirm the name does not infringe a federal trademark.
  2. Appoint a Missouri registered agent. Every Missouri LLC must continuously maintain a registered agent with a Missouri registered office. The agent - an individual Missouri resident or a qualified entity - receives service of process and official notices and must consent to serve.
  3. File the Articles of Organization. Submit the Articles of Organization to the Missouri Secretary of State and pay the fee - $50 when filed online (paper filing costs more). Online filing is the fastest route. Once accepted, your LLC legally exists.
  4. Write an operating agreement. Missouri's LLC statute expects members to adopt an operating agreement, and while it is not filed with the state, adopting one - even for a single owner - documents ownership, management, and how the business operates and helps prove the LLC's separate legal existence.
  5. Get an EIN and register for state tax. Apply for a free federal EIN from the IRS if you need one, then register with the Missouri Department of Revenue for any taxes your business collects, such as sales tax.

After these steps, open a business bank account (banks generally ask for the stamped Articles of Organization and the EIN). Because Missouri does not require an annual report, ongoing state maintenance mainly means keeping your registered agent current. For the full state walkthrough, see how to form an LLC in Missouri.

EIN Requirements for a Missouri SMLLC

An Employer Identification Number (EIN) is a nine-digit federal tax ID issued by the IRS. It is always free, and you should never pay a third party to obtain one. Whether your single-member LLC must have an EIN depends on how it operates.

Because a disregarded SMLLC is ignored for federal income tax, an owner with no employees can technically use their own Social Security number for federal income tax reporting. However, the IRS requires an EIN when the LLC:

This is the practical face of the disregarded-entity rule: for employment and excise taxes the LLC is treated as a separate entity and files under its own EIN, even though income tax flows to the owner. Beyond the strict requirements, most banks require an EIN to open a business account, and Missouri Department of Revenue registration is easier with one. An EIN also keeps the owner's SSN off vendor and payer paperwork. If you are a non-US owner without a Social Security number, see what is an ITIN for how the responsible-party rules apply.

Liability Protection for a Single-Member Owner

The central benefit of a Missouri SMLLC over a sole proprietorship is the limited liability shield. Because the LLC is a separate legal entity under Chapter 347, the owner is generally not personally responsible for the LLC's debts, contracts, or lawsuits - creditors of the business usually can reach only the LLC's assets, not the member's home or personal savings.

That protection is neither automatic nor absolute. Courts can disregard the shield (often called "piercing the veil") when an owner treats the LLC as an alter ego. To keep the protection intact, a single-member owner should maintain a separate business bank account, avoid mixing personal and business funds, sign contracts in the LLC's name, keep the registered agent current, and adequately capitalize the business. Any personal guarantee you sign - common on small-business loans and leases - is a separate personal obligation that the LLC shield does not cover.

The Operating Agreement and State Filing

An operating agreement is the internal contract that governs how the LLC is owned and run. For a single-member LLC it can feel redundant, but it does real work: it confirms the member owns 100% of the company, sets out management and succession, and reinforces that the LLC is separate from its owner, which supports the liability shield.

Missouri's statute contemplates an operating agreement, but you do not file it with the state, and it is never submitted with the Articles of Organization. It is a private document you keep with your business records. The Missouri LLC Act supplies default rules that apply when the agreement is silent, so a written agreement lets you override those defaults where you prefer different terms. Banks, lenders, and potential buyers routinely ask to see it. See LLC operating agreements for what to include and business licenses for permits your activity may require.

Missouri State Tax for a Single-Member LLC

Missouri imposes a state individual income tax, and because a disregarded SMLLC's profit passes through to its owner, that profit is reported on the owner's Missouri individual income tax return. The LLC itself does not file a separate Missouri income tax return unless it elects corporate treatment federally. If it elects corporate or S-corporation status, its Missouri filing changes accordingly.

If your LLC sells taxable goods or certain services, you must register with the Missouri Department of Revenue for sales tax and collect and remit it; a sales tax bond may be required. Employers also register for Missouri withholding tax on employee wages. Because a disregarded single-member LLC is not itself an income taxpayer in Missouri, the owner generally makes any estimated tax payments in their own name, based on the business profit reported on Schedule C. Specific activities and locations can require additional state or local licenses. Learn more at business tax, compare federal tax elections at S-corp vs LLC, and when you are ready to close the company, see how to dissolve an LLC.

Frequently Asked Questions

How is a single-member LLC in Missouri taxed?

By default the IRS treats a single-member LLC as a disregarded entity, so its income is reported on the owner's personal return, usually Schedule C. Missouri follows that classification for income tax, and the profit flows to the owner's Missouri individual income tax return.

Does a Missouri single-member LLC need an EIN?

It is required if the LLC has employees, owes excise or employment taxes, or elects corporate taxation. A disregarded single-member LLC with no employees can use the owner's SSN for federal income tax, but most banks require an EIN to open an account.

Does a Missouri LLC have to file an annual report?

No. Unlike corporations, Missouri LLCs are not required to file an annual registration report with the Secretary of State. You still must keep a registered agent on file and stay current with the Department of Revenue on any tax accounts.

How much does it cost to form a single-member LLC in Missouri?

The Articles of Organization filing fee is $50 when filed online with the Missouri Secretary of State; paper filing costs more. There is no state annual report fee for Missouri LLCs, which keeps ongoing state costs low.

Do I have to file an operating agreement with Missouri?

No. Missouri does not require you to file the operating agreement with the state, though its LLC statute expects members to adopt one. Even for a single owner, a written operating agreement documents ownership and the LLC's separate existence.

Related

More Missouri business guides

Business License In Dissolve An Llc In Annual Report Articles Of Organization Business Entity Search Certificate Of Formation Dba Filing Llc Tax Filing Operating Agreement Registered Agent

Sources

  1. Missouri Secretary of State - Start a Business (Articles of Organization; LLC formation).
  2. Missouri Secretary of State - Corporations Forms and Fees ($50 online Articles of Organization).
  3. Missouri Secretary of State - Registered Agents (registered agent requirement).
  4. Missouri Secretary of State - Business Entity Search (name availability).
  5. Missouri Department of Revenue - Register a Business (state tax registration).
  6. Missouri Department of Revenue - Sales and Use Tax (registration and rates).
  7. Missouri Revised Statutes - Chapter 347, Limited Liability Companies.
  8. Justia - Missouri Revised Statutes Chapter 347 (Limited Liability Companies).
  9. IRS - Single Member LLCs (disregarded entity; separate for employment and excise tax).
  10. IRS - Limited Liability Company (LLC) (federal default classification).
  11. IRS - Get an Employer Identification Number (free EIN).
  12. IRS - Do You Need an EIN? (when an SMLLC must have one).
  13. IRS - Business Taxes (federal tax overview).
  14. Cornell Law School LII - 26 CFR § 301.7701-3 (entity classification / check-the-box rules).

LegalGlass provides general information for educational purposes and is not a law firm or a substitute for advice from a licensed attorney or tax professional. Laws, fees, and thresholds change; verify current requirements with the Missouri Secretary of State and Department of Revenue before acting.