Pen, notebook and reading glasses on a wooden table, Sole Proprietorship in Missouri: How to Start One

Sole Proprietorship in Missouri: How to Start One

Last verified: November 4, 2026

You do not file anything to create a Missouri sole proprietorship. Licensing is handled separately (see the Missouri business license guide). So the real checklist is short: a fictitious name registration only if you use a name other than your own, a Department of Revenue tax account if you sell taxable goods or hire, and a city or county license.

Our position: start as a sole proprietor when a lawsuit or unpaid debt would not cost you more than you could cover from your own savings, because the paperwork is light but the liability is not. If a client, customer or contract could realistically put your home or savings at risk, compare it with an LLC (Missouri LLC guide) before your first sale.

What a Sole Proprietorship Is in Missouri

A sole proprietorship is not a registered entity. You and the business are the same legal person, so there is no state filing that creates it and no legal shield between your business debts and your personal assets. That is the tradeoff: no startup fee, no entity paperwork, and no liability protection.

For comparison, a Missouri LLC costs $50 online or $105 on paper to form with the Secretary of State, and the Secretary of State FAQ says LLCs do not file an annual report. That is cheap enough that the real question is risk, not cost. Choose the sole proprietorship for low-risk work you can start today, such as freelance writing or consulting. Choose an LLC for anything with a storefront, employees driving for you, physical products that can hurt someone, or contracts with other businesses.

What You Need Before You Start

  • A name decision: your own legal name needs no registration. Any other name does (Step 2).
  • $7.00 for the fictitious name registration, if you use one (Missouri Secretary of State: fictitious name FAQ).
  • An EIN, if you need one: the IRS says you need one if you have employees, among other cases, and it is free from the IRS (IRS: employer ID numbers).
  • Access to MyTax Missouri through the Department of Revenue: register a business page if you will charge sales tax or hire.
  • Your city or county license office contact details. Local rules decide whether you need a license.

Costs at a Glance

ItemCostNotes
Sole proprietorship itself$0No state filing creates it; the Missouri Secretary of State: business FAQ says the office does not issue business licenses
Fictitious name (DBA)$7.00Only if you use a name other than your own; good for five years (Missouri Secretary of State: fictitious name FAQ)
EINFreeApply only through the IRS (IRS: get an EIN)
Sales tax accountNo fee listedThe Department of Revenue registration page lists no fee (Department of Revenue: register a business)
City or county licenseVariesSet by each city; Columbia charges $0.25 per $1,000 of gross receipts, $75 minimum, plus a $45 application fee (City of Columbia: business licenses)

Step-by-Step: Starting a Missouri Sole Proprietorship

Step 1: Choose Your Business Name

If you operate as "Jane Smith" doing consulting work, you register nothing. If you want "Ozark Creative Consulting," that is a fictitious name and Step 2 applies.

Search the Missouri Secretary of State: business entity search before you commit to a name. The FAQ is clear that a fictitious name registration "does not afford or secure any exclusive rights to the name," so a clean search does not protect you from a trademark claim. It only helps you avoid obvious confusion.

Step 2: Register a Fictitious Name If You Use One

The Secretary of State says anyone doing business under a name other than their true name must register it. File the Registration of Fictitious Name (Form Corp. 56) online through the Business Filings portal or on paper, with the original signatures of all owners. The form asks for the owner names, the percentage of ownership, the business name and the business address. The fee is $7.00 and the filing goes to the Secretary of State, not to a county.

Put the expiry in your calendar now. A registration is good for five years, renewals must be filed in the six months before it expires, and once it expires it cannot be renewed: you file a new registration, which gets a new charter number (Missouri Secretary of State: fictitious name FAQ).

Step 3: Decide Whether You Need an EIN

The IRS says you need an EIN if you have employees, and the EIN itself is free (IRS: employer ID numbers). If you have no employees, our recommendation is to get one anyway only when a bank or client asks for it, since that keeps your Social Security number off more paperwork.

Step 4: Register for Missouri Taxes Before Your First Sale

The Department of Revenue registers sales tax, withholding tax and unemployment tax through one online application (Department of Revenue: register a business). Register before you make a taxable retail sale: the Department's FAQ says a person making retail sales without a Missouri sales tax license faces a penalty of $500 for the first day and $100 for each day after, up to $10,000 (Department of Revenue: business tax registration FAQ).

The state sales tax rate is 4.225%, and cities, counties and districts may add their own (Department of Revenue: sales and use tax). Use the Department's rate lookup for the exact combined rate at your location.

If you hire, a general business employer becomes liable for unemployment tax after paying $1,500 in wages in a calendar quarter or having a worker in each of 20 different weeks, and must notify the Division of Employment Security within 30 days (Missouri Division of Employment Security: employer liability). A freelancer paid directly by clients, with no taxable sales and no employees, may have nothing to register with the Department of Revenue beyond personal income tax. If you are unsure, our position is to register: the Department lists no fee and a missed registration is the expensive mistake.

Step 5: Get the City or County License

This is where most Missouri sole proprietors get caught. The city or county where you work decides what you need (see our Missouri business license guide for the state side). Fees and rules differ by place. Columbia, for example, treats a person as in business after one act of selling or soliciting, charges $0.25 per $1,000 of gross receipts with a $75 minimum, and requires a Home Occupation Form if you work from your residence inside the city limits (City of Columbia: business licenses). Springfield publishes a City of Springfield: business license search where you can check whether a business is licensed.

Call or visit your own city hall or county clerk before opening. If you work from home, also read our home-based business guide for zoning. Do not assume a neighboring city has the same answer.

Step 6: Check Professional and Trade Licenses

If you work in a regulated field such as cosmetology, real estate, contracting or child care, a state board or local authority licenses the work itself, separate from any business registration. Search the state's Missouri Division of Professional Registration: license search to see whether your occupation is licensed and by whom.

Step 7: Plan for Insurance and Taxes

Because nothing separates you from the business, insurance is your main protection. This is reasoning, not a legal requirement: general liability, and professional liability if you give advice, usually costs far less than one uninsured claim. Workers' compensation is required in Missouri with five or more employees, or one or more in construction (Missouri Division of Workers' Compensation: insurance requirements).

For taxes, you report business income on Schedule C with your Form 1040 and pay self-employment tax using Schedule SE (IRS: sole proprietorships). Individuals who expect to owe $1,000 or more when they file generally need to make estimated payments (IRS: estimated taxes). Missouri's top individual income tax rate is 4.70% for 2026 (Missouri Department of Revenue: 2026 withholding formula (PDF)). Keep business money in a separate account; the law does not require it, but it makes the Schedule C and any later move to an LLC far cleaner.

Common Mistakes to Avoid

  • Skipping the DBA: using a business name other than your own without registering it, then assuming the registration protects the name. It does not.
  • Letting the DBA expire: an expired registration cannot be renewed, so you start over with a new charter number.
  • Selling before registering with the Department of Revenue: the penalty starts on the first day.
  • Assuming no state license means no license: the city or county may still require one.
  • Treating the structure as a shield: a sole proprietorship has none, so higher-risk work belongs in an LLC.

When to Move to an LLC

Move when your revenue, client contracts or physical risk grow beyond what you could pay out of pocket. Forming an LLC costs $50 online and has no annual report, so the ongoing cost is low. Our Missouri LLC guide covers the filing, and our comparison of Missouri LLC formation services shows what a service adds. Free local help is available from the Missouri Small Business and Technology Development Centers.

Sources

Disclaimer

This article is for general informational purposes only and does not constitute legal or tax advice. Missouri business requirements can vary by city, county, and industry, and rules can change. For guidance specific to your situation, consult a licensed Missouri attorney and a qualified CPA before making formation, licensing, or tax decisions.

Keep exploring: related Missouri guides