How to Start a C-Corp in Missouri (Quick Answer)
To start a C-corp in Missouri, file Articles of Incorporation with the Missouri Secretary of State's Corporations Division, name a registered agent, and pay the filing fee, which starts at $58 for most new corporations. You can file online or by mail. Once the state accepts it, your corporation legally exists.
After that, you adopt bylaws, appoint directors and officers, issue stock, and get an EIN from the IRS. Missouri pairs a low filing fee with a flat 4% corporate income tax and no franchise tax, and the main thing to watch is the annual registration report.
| Filing document | Articles of Incorporation (Chapter 351, general business corporation) |
| Where to file | Missouri Secretary of State, Corporations Division |
| Filing fee | $58 for $30,000 or less of authorized capital, rising $5 for each additional $10,000 |
| Registered agent | Required, with a physical Missouri street address |
| EIN | Required, free from the IRS (Form SS-4 by phone, fax, or mail if you have no SSN or ITIN) |
| Annual report | Registration report, $20 online, due by the end of your anniversary month each year |
| Corporate income tax | Flat 4% on Missouri taxable income |
| Foreign owner (25% or more) | File Form 5472 with Form 1120 every year, or face a $25,000 minimum penalty |
First-year cost: $58 to file if you authorize $30,000 or less of shares, plus a registered-agent service if you use one, commonly $50 to $150 a year. Your first registration report is not due until the end of your anniversary month the following year.
Missouri is an affordable state to incorporate in. The filing fee is low, the online annual report is only $20, and there is no corporate franchise tax on top of the income tax.
The one thing to watch is the annual registration report. Missouri corporations must file it by the end of the anniversary month each year, unlike Missouri LLCs, which file none. Miss it and the state charges a $15 late fee every 30 days, and a corporation left unfiled for 90 days can be administratively dissolved.
TL;DR
- Affordable to form, but watch the annual registration report: it is $20 online, due by the end of your anniversary month, and corporations must file it even though Missouri LLCs do not.
- Step 1, name: pick a unique name with a corporate designator (Inc., Incorporated, Corporation, or Corp.) and check it with the Secretary of State.
- Step 2, registered agent: name one with a physical Missouri street address.
- Step 3, Articles of Incorporation: file with the Secretary of State's Corporations Division, starting at $58.
- Step 4, bylaws: adopt internal bylaws and keep them with your records.
- Step 5, directors and officers: appoint the board and officers and hold an organizational meeting.
- Step 6, issue stock: authorize and issue shares, keep a stock ledger, and file the 83(b) election within 30 days if your shares vest.
- Step 7, EIN: get a free EIN from the IRS, by Form SS-4 if you have no SSN or ITIN.
- Foreign owner (25% or more): file Form 5472 with Form 1120 every year, or risk a $25,000 penalty.
- Ongoing: a $20 online registration report by the end of your anniversary month, plus the flat 4% corporate income tax.
Why Form a C-Corp in Missouri?
Missouri pairs a low, flat corporate tax with cheap filings and no franchise tax, which keeps the ongoing cost of running a corporation down.
- A low $58 filing fee for most new corporations and a $20 online annual report.
- A flat 4% corporate income tax, among the lower flat corporate rates in the country.
- No corporate franchise tax, so there is no capital-based charge on top of the income tax.
If you plan to raise venture capital, investors will most likely want a Delaware C-corp. If you will run the business in Missouri and not raise venture money, forming in Missouri avoids registering and paying in two states.
Step 1: Choose and Reserve Your Corporate Name
- Include a corporate designator such as "Inc.", "Incorporated", "Corporation", or "Corp."
- Search the Secretary of State's business database to confirm the name is available and different from existing entities.
- Missouri lets you reserve a name for 60 days for $25, renewable twice for a total hold of up to 180 days, if you are not ready to file.
Step 2: Appoint a Missouri Registered Agent
Every Missouri corporation must name a registered agent with a physical Missouri street address, available during business hours to receive legal and state documents.
- The agent can be a person or a company, but needs a real Missouri address, not a PO box on its own.
- The address is public record, so many owners use a commercial service.
- A commercial agent commonly costs $50 to $150 a year.
Step 3: File Your Articles of Incorporation
The Articles of Incorporation is the filing that legally creates your corporation. In Missouri you file it with the Secretary of State's Corporations Division, online or by mail.
- It lists the corporate name, registered agent, incorporator, principal office, and the number of shares the corporation is authorized to issue.
- The fee starts at $58 for $30,000 or less of authorized shares, the tier most startups fall in, and rises $5 for each additional $10,000.
- Once the state accepts it, your corporation exists and its compliance calendar begins.
Step 4: Adopt Corporate Bylaws
Bylaws are the internal rulebook for how the corporation is run. They are not filed with the state, but a corporation is expected to have them, and banks and investors often ask to see them.
- They set out how directors and officers are elected, how meetings and votes work, and how shares are handled.
- They stay with your records, not with the Secretary of State.
- Skipping them weakens the separation between you and the corporation that liability protection depends on.
Step 5: Appoint Directors and Hold the Organizational Meeting
A corporation is run by a board of directors, who appoint the officers that handle day-to-day work. Right after formation, the incorporator or initial directors hold an organizational meeting, or sign a written consent in place of one.
- Appoint the initial board and elect officers (usually at least a president, secretary, and treasurer; one person can hold several roles).
- Adopt the bylaws and authorize the issuance of stock.
- Keep signed minutes or the written consent with your records.
Step 6: Authorize and Issue Stock
Issuing stock is how founders get their ownership, and it is easy to rush. The board authorizes shares, then the corporation issues them to the founders and any early shareholders.
- Issue shares to each founder and record what they paid (cash, property, or services).
- Keep a stock ledger, a running record of who owns how many shares.
- Deliver stock certificates or record the issuance electronically, per your bylaws.
The 83(b) election, and its 30-day deadline: if your founder shares vest over time, you generally have 30 days from the grant date to file an 83(b) election with the IRS.
It lets you be taxed on the small value at grant instead of the higher value as the stock vests. The 30-day window cannot be extended, and missing it can be expensive.
Step 7: Get an EIN, Even Without an SSN
An EIN is your corporation's federal tax ID, needed to file taxes, run payroll, and open a bank account. It is free from the IRS.
- With an SSN or ITIN, apply online and get the EIN in minutes.
- Without an SSN or ITIN, apply on Form SS-4 by phone, fax, or mail.
- The EIN is always free; you never pay the IRS for one.
Open a US Business Bank Account
Once you have the EIN, open a dedicated business bank account before money moves through the corporation.
- Keeping corporate and personal funds separate protects the liability shield; mixing them is a common reason courts pierce it.
- Banks usually ask for the filed Articles of Incorporation, the EIN letter, and often the bylaws or a board resolution.
- A separate account also makes bookkeeping and the corporate tax return simpler.
If Your Missouri C-Corp Is Foreign-Owned
A Missouri C-corp that is 25% or more owned by a non-US person has an extra federal filing that many international founders miss.
- The corporation files Form 5472 with its annual Form 1120 to report transactions with the foreign owner, such as money put in or paid out for services.
- It is required every year there are reportable transactions, even with little or no profit.
- The penalty is steep: a missed or late Form 5472 starts at $25,000 per form, per year.
Handle Missouri's Ongoing Compliance
Missouri keeps the yearly load light. Two things matter: the annual registration report and the corporate income tax.
The Annual Registration Report
- Every Missouri corporation files an annual registration report with the Secretary of State, $20 online or $45 by mail.
- It is due by the end of your anniversary month, the month your corporation was formed, each year.
- Miss it and the state adds a $15 late fee for every 30 days; a corporation left unfiled for 90 days past the deadline can be administratively dissolved.
Missouri Corporate Income Tax (4%)
- Missouri charges a flat 4% corporate income tax on Missouri taxable income, filed on Form MO-1120 with the Department of Revenue.
- There is no corporate franchise tax on top of it.
- Federally, the corporation files Form 1120 and pays 21% corporate tax, due the 15th day of the 4th month after year-end.
How Much Does It Cost to Start a C-Corp in Missouri?
| What you pay | Amount | When |
|---|---|---|
| Articles of Incorporation filing | $58 for $30,000 or less of authorized capital | One time, at formation |
| Registered-agent service (optional) | ~$50 to $150 a year | Yearly, if you use one |
| Annual registration report | $20 online ($45 by mail) | Yearly, by the end of your anniversary month |
| Missouri corporate income tax | Flat 4% of Missouri taxable income | Yearly |
| Federal corporate tax | 21% of profits | Yearly, with Form 1120 |
How Long Does It Take to Start a C-Corp in Missouri?
- Online filings with the Secretary of State are usually processed within about one to two business days; mailed filings can take roughly three to four weeks.
- The EIN follows: minutes online with an SSN or ITIN, or same day to several weeks by Form SS-4 without one.
- Bylaws, the organizational meeting, and issuing stock happen right after the state approves the filing.
Common Mistakes to Avoid
- Missing the annual registration report; unlike Missouri LLCs, corporations must file one, and a corporation left unfiled for 90 days can be administratively dissolved.
- Missing the 30-day 83(b) deadline on vesting founder stock.
- Overlooking Form 5472 if the corporation is 25% or more foreign-owned.
- Using a PO box for the registered agent, which Missouri does not accept on its own.
- Authorizing far more than $30,000 of shares without noticing that the filing fee rises with authorized capital.
How FinStackk Helps
FinStackk is an accounting and tax compliance platform for U.S. businesses, taking you from incorporation through ongoing accounting, tax, and compliance in one place.
We handle Missouri C-corp formation, from the Articles of Incorporation through the EIN, through Fin-Start, including the Missouri registered agent.
Once the corporation exists, Fin-Tax keeps the federal Form 1120 deadline, estimated taxes, and the Missouri 4% corporate income tax on a proactive calendar. Complyy tracks the $20 annual registration report deadline and your registered-agent renewal. Book a free demo to see them in action.
FAQ
How much does it cost to start a C-corp in Missouri?
It costs $58 to file the Articles of Incorporation if you authorize $30,000 or less of shares, rising $5 for each additional $10,000 of authorized capital. Add a registered-agent service (about $50 to $150 a year) if you use one. The main recurring items are the $20 online registration report and the flat 4% corporate income tax.
When is the Missouri annual report due?
The annual registration report is due by the end of your anniversary month, the month your corporation was formed, each year. It costs $20 online or $45 by mail. Miss it and the state adds a $15 late fee every 30 days, and a corporation left unfiled for 90 days can be administratively dissolved.
Does a Missouri C-corp pay state income tax?
Yes. Missouri charges a flat 4% corporate income tax on Missouri taxable income, filed on Form MO-1120 with the Missouri Department of Revenue. That is in addition to the 21% federal corporate tax on Form 1120. Missouri has no corporate franchise tax, and a proposal to phase out the corporate income tax has been introduced but is not yet law.
Is it better to form a C-corp or an LLC in Missouri?
An LLC is simpler, taxed once, and files no annual report in Missouri, which suits many small businesses. A C-corp makes sense if you plan to raise venture capital, keep earnings in the business, or want multiple classes of stock. A C-corp is taxed twice, once at the corporate level and again on dividends, and it does file the annual registration report.
Should I form my C-corp in Missouri or Delaware?
If you plan to raise venture capital, Delaware is what investors expect. If you will operate in Missouri and not raise venture money, forming in Missouri is cheaper and avoids registering and paying in two states, since a Delaware corporation doing business in Missouri still has to register and pay here. Choose based on where you operate and whether you will raise money.
Can a non-US resident start a Missouri C-corp?
Yes. Missouri sets no citizenship or residency requirement to own a corporation. You will need a Missouri registered agent and an EIN, which you apply for on Form SS-4 by phone, fax, or mail without an SSN. If a non-US person owns 25% or more, the corporation also files Form 5472 with its Form 1120 every year, with a $25,000 minimum penalty for missing it.