Start a Mississippi LLC: Step-by-Step Guide

Your LLC's name has to be distinguishable from every other business name already on file with the Mississippi Secretary of State. "Distinguishable" is a legal test, not a gut feeling: a name that differs only by punctuation, spacing, or a filler word like "the" or "and" may not clear it. The state checks your proposed name against all registered entities, not just other LLCs.

Start with the Secretary of State's business search, which is public and needs no login. Run your intended name and a few close variations. If something already on file reads or sounds too similar, the state can reject your Certificate of Formation, which sets you back and delays everything downstream.

Naming rules to keep in mind

• The name must contain "limited liability company," "L.L.C." or "LLC."
• Under § 79-29-109, it may not contain "bank," "banker," "bankers," "banking," "trust company," "insurance," "trust," "corporation," "incorporated," "partnership," or "limited partnership," or any combination or abbreviation of them.
• Professional terms tied to licensed fields may need sign-off from the relevant licensing board.
• It must be distinguishable from all names in the Secretary of State's records.

Reserving a name

If you've settled on a name but aren't ready to file yet, Mississippi lets you reserve it for 180 days through the Secretary of State's portal for $25. Reserving doesn't create the LLC. It just holds the name so no one else grabs it while you get the rest of your paperwork in order.

Before you file, you need a registered agent settled and willing to serve, because the agent's name and Mississippi address go directly into the Certificate of Formation.

Mississippi law requires every LLC to keep a registered agent and registered office in the state for the entire life of the company. The agent is who receives lawsuits, subpoenas, regulatory notices, and official mail from the Secretary of State on your behalf.

Who can serve

The Secretary of State's rule is that any individual, corporation, or LLC may act as registered agent for a Mississippi company, provided the agent has a physical address in Mississippi. In practice that gives you three choices:

• You: if you live in Mississippi and have a physical address there (not a P.O. box). Your address then appears in the public record.
• Another individual: a Mississippi resident with a physical address in the state, such as a co-owner, an employee, an attorney, or another trusted person who agrees to the role.
• A commercial registered agent service: a company that registers with the state as a commercial agent. It puts its own professional address on the public record instead of yours and forwards documents to you promptly.

Why the choice matters

If you name yourself and use your home address, that address becomes searchable on the Secretary of State's system. Anyone who looks up your LLC can see it. Owners who work from home, travel, or keep irregular hours often use a commercial service specifically to keep their home address private and to make sure a served document never sits at an empty house.

The Certificate of Formation is the document that legally creates your LLC in Mississippi. You file it through the Secretary of State's business portal: choose "File Business Documents," register or log in (your email becomes your username), and pick the option to form a new entity. The state fee is $50, payable by credit card, e-check, or ACH. If you'd rather not pay online, the Secretary of State's FAQ says the form can be completed online, printed, and mailed with a check, but paper registrations take significantly longer.

The Secretary of State says some documents paid online are approved and filed immediately, while others go to a reviewer and should be handled within 24 hours of submission. Once the state accepts the Certificate, your LLC becomes active, appears in the public business search, and the filed document arrives by email.

What the Certificate of Formation asks for

• LLC name: your full legal name with the required designator
• Registered office: its street and mailing address in Mississippi (a P.O. box can't be the street address)
• Registered agent: the agent's name and street and mailing address
• Dissolution date: only if the LLC won't be perpetual
• Effective date: on filing, or a delayed date no later than the 90th day after filing

What you don't have to disclose

You don't list your members' names or ownership percentages, you don't describe your business activities in detail, and you don't report any financial information. The Certificate is a short formation document, not a disclosure filing. Everything about how the company is owned and run lives in your operating agreement, which stays private.

An operating agreement is your LLC's internal rulebook. Mississippi doesn't require you to file it, and it never enters any public database, but you should have it in place before you start doing business, take on partners, or open accounts.

What a solid operating agreement covers

• Ownership: who the members are and what percentage each one holds
• Capital contributions: what each member put in at the start and any obligation to contribute more later
• Profit and loss allocation: how gains and losses are split; it usually tracks ownership but doesn't have to
• Distributions: when and how cash actually gets paid out to members
• Management: who runs day-to-day operations, what they can decide alone, and which decisions need a full member vote
• Voting: whether votes are weighted by ownership or counted per member
• Transfers: what happens when a member wants to sell or leave, including rights of first refusal and approval requirements
• Dissolution: the conditions for winding the company down and how remaining assets are divided

For a single-member LLC, the agreement helps prove the company is a genuine separate entity, which courts weigh when someone challenges your liability shield. Most banks want to see it when you open a business account. For a multi-member LLC it's indispensable. Without it, the Mississippi LLC Act's defaults govern everything, and those defaults rarely match what the members actually had in mind.

An Employer Identification Number is a nine-digit federal tax ID the IRS issues for free. Think of it as a Social Security number for the business. You use it on tax filings, to open bank accounts, and to hire employees.

When you need one

• Your LLC has more than one member (multi-member LLCs file a partnership return and need an EIN)
• You plan to hire employees
• You want to open a business bank account (nearly every bank requires it)
• You've elected S-corp or C-corp tax treatment

A single-member LLC with no employees can technically use the owner's Social Security number for federal taxes, but most advisers recommend getting an EIN anyway. It keeps your SSN off business paperwork and simplifies opening accounts.

How to apply

Apply through the IRS EIN Assistant at IRS.gov. The online application takes roughly ten minutes and the number is issued immediately, so you can use it the same day. You need a US Social Security number or ITIN to finish online. Applicants without one file Form SS-4 by fax or mail instead. If Mainstay forms your LLC, we apply for the EIN for you once the Certificate is filed; the number itself stays free.

Keeping business and personal money separate isn't optional if you want the liability protection to hold. Pay personal bills from the company account or deposit business income into your personal one, and you hand a creditor an argument that the LLC and you are really the same thing, which is exactly how the shield gets pierced.

What banks usually want

• Your filed Certificate of Formation
• Your IRS EIN confirmation
• Your operating agreement (many banks ask for it; have it ready either way)
• Government-issued ID for everyone who will sign on the account

Mississippi community banks and credit unions are often more flexible with brand-new LLCs than the big national chains, and several online business banks can open an account without a branch visit. Before you commit, compare monthly fees, transaction limits, and minimum-balance rules.

Most of the work is front-loaded into formation. After that, Mississippi asks for one main thing each year plus some attentiveness when your details change.

Annual report

File the annual report with the Secretary of State by April 15 each year through the online business portal. For a domestic Mississippi LLC there is no state fee to file it, but the filing is still required, and it can only be filed online (the window opens January 1). The report updates your registered agent, principal office, and management information, and asks whether you have a written operating agreement; it is not a financial statement. If a report is more than 60 days late, the Secretary of State can begin administrative dissolution, which takes effect if the problem isn't fixed within 60 days after the notice.

Registered agent maintenance

If your agent changes address, resigns, or you switch to a new one, file the change with the Secretary of State promptly. It's handled as an amendment in the portal and costs $10. An outdated agent record leaves the LLC technically non-compliant even when everything else is current.

Taxes

Federal filings depend on how the LLC is taxed: Schedule C for single-member, Form 1065 for multi-member, Form 1120-S if you've elected S-corp treatment. Mississippi has a state income tax, and your share of the LLC's profit flows through to your Mississippi return. If you sell taxable goods or services, register for sales tax with the Mississippi Department of Revenue.

Licenses and permits

Mississippi issues no single statewide general business license, but many professions require a state board license, and cities and counties often require local privilege licenses. These run on their own cycles and are entirely separate from your Secretary of State registration.