Start a Missouri Corporation — Step-by-Step Guide

Your corporate name must be distinguishable from every other business name already on file with the Missouri Secretary of State. "Distinguishable" is a legal standard — a name that differs only by punctuation, spacing, or a word like "the" or "and" may not clear. The state checks your proposed name against corporations, LLCs, limited partnerships, and reserved names alike.

Start with the Missouri business entity search. Run your exact name and several close variants. If something reads or sounds too similar, expect the Business Services Division to reject your Articles, which costs you days.

Missouri corporate name rules

• The name must contain a corporate ending: "Corporation," "Company," "Incorporated," "Limited," or an abbreviation such as "Inc.," "Corp.," "Co.," or "Ltd."
• It cannot imply a purpose the corporation is not authorized to pursue, and certain regulated words (such as "bank," "trust," or "insurance") require approval from the relevant state authority.
• It must be distinguishable on the record from existing and reserved names.

Optional: reserve the name first

If you have the name but are not ready to file, Missouri lets you reserve a corporate name for a limited period through the Secretary of State. Reservation does not create the corporation — it holds the name while you finish everything else.

Before you file, you need a registered agent lined up and willing to serve. The registered agent is named in the Articles of Incorporation and is the person or company that will receive lawsuits, subpoenas, and official state notices for the corporation.

Missouri requires every corporation to maintain a registered agent with a physical Missouri street address, staffed during normal business hours, for the entire life of the entity.

Who can serve

• Yourself, if you have a physical Missouri street address (not a P.O. box) and are reliably available during business hours. Your address becomes part of the public record.
• Another individual who is a Missouri resident — a co-founder, an employee, or an attorney with a Missouri address.
• A commercial registered agent service, which keeps its own professional address on the public record, guarantees availability, and forwards documents to you promptly.

When you appoint someone other than yourself, Missouri expects the agent's consent; the state provides a registered agent consent form (Corp-59) for this. Many founders choose a commercial agent specifically to keep a home address out of a searchable public database and to avoid missing a served lawsuit while away.

Two decisions belong in this step because they shape the Articles and the organizational meeting that follows.

Authorized shares

The Articles state how many shares the corporation is authorized to issue. This is a ceiling, not a mandate — you can authorize a round number and issue only a fraction of it at formation. In Missouri, the state filing fee is tied in part to the number of authorized shares, so most small corporations authorize a modest amount to start. If you plan to bring on investors or grant equity to employees later, authorize enough headroom to accommodate that without an immediate amendment.

Classes of stock

Most single-owner and small corporations authorize one class of common stock, where every share carries the same voting and economic rights. If you anticipate outside investment, you may eventually want a separate class with different rights, but that complexity is rarely needed at the outset and can be added by amendment.

Initial directors

Decide who will sit on the first board. Missouri permits a board of one or more directors. The incorporator can name the initial directors in the Articles, or the incorporator can hold an organizational meeting to elect them after filing.

The Articles of Incorporation is the filing that brings your corporation into legal existence in Missouri. You submit it to the Business Services Division online or on paper. The state charges a filing fee published on the Secretary of State's fee schedule; because the fee scales with authorized shares, confirm your share count before you file.

Online submissions are typically processed quickly — often the same day the state accepts them — while paper filings take longer to work through. Once recorded, the corporation exists and appears in the business entity search.

What goes in the Articles

• Corporate name with a valid corporate ending
• Registered agent name and Missouri registered office address — a physical street address, no P.O. box
• Number of authorized shares and the classes if more than one
• Incorporator name and address — the person signing and submitting
• Purpose — usually a general lawful business purpose
• Duration — usually perpetual

You do not disclose shareholders, ownership percentages, or financial information in the Articles. Those internal details live in your bylaws and stock records, which stay private.

Filing the Articles creates the corporation, but it does not organize it. That happens at the organizational meeting, where the initial directors put the operating framework in place.

Adopt corporate bylaws

Bylaws are the corporation's internal rulebook. They cover how directors are elected and removed, how meetings are called and voted, what the officers do, how shares are issued and transferred, and how the bylaws themselves can be amended. Missouri does not file your bylaws — they are an internal document — but the corporation should adopt them and keep them with its records.

Complete the organizational steps

At the organizational meeting (or by written consent in place of a meeting) the board typically:

• Adopts the bylaws
• Elects officers (president, secretary, treasurer, and any others)
• Authorizes the issuance of shares to the initial shareholders and records who received what
• Approves opening a corporate bank account
• Approves the corporate seal and stock certificate form, if used
• Authorizes any S-corporation tax election the shareholders intend to make

Document these actions in minutes and keep them in the corporate record book. This paper trail is a major part of what keeps the liability shield defensible.

Obtain an EIN

An Employer Identification Number is a federal tax ID issued by the IRS at no cost. Every corporation needs one — it is used on federal returns, to open bank accounts, and to hire employees. Apply online through the IRS EIN Assistant at IRS.gov; the number is issued immediately on completion. Applying online requires a US Social Security number or ITIN for the responsible party; those without one apply by fax or mail using Form SS-4.

Open a corporate bank account

Separate finances are essential to preserving the liability shield. Mixing corporate and personal money is one of the fastest ways to give a court a reason to pierce the corporate veil. Most banks want to see the filed Articles of Incorporation, the EIN confirmation, the bylaws, and a board resolution authorizing the account and naming who may sign. Bring government-issued ID for every authorized signer.

Most of the work is front-loaded in formation. After that, the recurring obligations are manageable if you stay attentive.

Annual registration report

Missouri corporations file an annual registration report with the Secretary of State. It confirms your registered agent and office and keeps the corporation active. The corporation's filing due date is tied to its anniversary. Missing it puts the corporation at risk of losing good standing and, eventually, administrative dissolution — reinstating later costs more and disrupts operations.

Registered agent maintenance

If your registered agent changes address, resigns, or you switch agents, file the update with the Secretary of State promptly. A stale registered office leaves the corporation technically out of compliance even if everything else is current.

Taxes and licenses

A default corporation files federal Form 1120; a corporation with a valid S-election files Form 1120-S. Register with the Missouri Department of Revenue for state corporate income tax and, if you sell taxable goods or services, for sales tax. Local city and county governments may require their own business licenses, which run on separate cycles from your state filing.