Start a Maryland LLC: Step-by-Step Guide

Your LLC's name has to be distinguishable from every other business entity already on record with the Maryland State Department of Assessments and Taxation. "Distinguishable" is a legal test, not just a gut check: names that differ only in punctuation, spacing, or filler words like "the" and "and" may not clear it. SDAT compares your proposed name against all entities on file, including corporations and partnerships, not just other LLCs.

Run your idea through the Maryland Business Express entity search before you get attached to it. Search the exact name and a few close variations. If something already registered reads or sounds too similar, SDAT can reject your Articles, which sets your timeline back.

Naming rules to keep in mind

• The name must include "limited liability company," "L.L.C.," "LLC," "L.C.," or "LC"
• It cannot suggest a purpose other than the ones your Articles allow
• It must be distinguishable on SDAT's records from entities organized or authorized in Maryland, and from names already reserved or registered

Reserving a name

If you want to lock in a name before you are ready to file, Maryland lets you reserve it with SDAT for 30 days for $25, and a reservation can be transferred once. That window is short, so reserve only when you are close to filing. A reservation does not create the LLC. It just holds the name while you handle everything else.

Trade names (DBAs)

Planning to operate under a name other than your LLC's legal name? Register a trade name with SDAT separately. That is a distinct filing from the Articles of Organization and does not by itself form or rename your company.

Before you file the Articles of Organization, you need a resident agent lined up and willing to serve. Maryland uses the term "resident agent" for what most states call a registered agent, and the person or company you name has to consent to the role; the agent signs a consent line right on the Articles.

Maryland law (Corps. & Ass'ns 4A-210) requires every LLC to keep a resident agent and a principal office in Maryland for as long as the company exists. The resident agent is the party that receives lawsuits, subpoenas, and official SDAT correspondence on the company's behalf.

Who can serve

Maryland's definition is narrower than many states'. A resident agent must be an individual who lives in Maryland, or a Maryland corporation, LLC, or limited partnership whose name, address, and designation as a resident agent are on file with SDAT.

• Yourself, if you live in Maryland. Your address then shows up in the public SDAT record.
• Another Maryland resident: a co-owner, an employee, or an attorney.
• A commercial resident agent service organized in Maryland and on file with SDAT. These keep their own professional address in the public record instead of yours and receive documents even when you are away.

Why the choice matters

Whatever address you list becomes searchable on Business Express. If you use your home, anyone who looks up your LLC can find where you live. Many owners choose a commercial service specifically to keep a home address out of a public database, and so legal papers have somewhere dependable to land during vacations or busy stretches.

The Articles of Organization is the document that brings your LLC into legal existence in Maryland. You file it online through Maryland Business Express. Remember that in Maryland this goes to SDAT, not the Secretary of State. Paper filings go to the SDAT Charter Division in Baltimore. The base filing fee for the Articles is $100, set by Corps. & Ass'ns 1-203, and paying online by card or PayPal adds a 3% technology fee.

Pick your speed

This is the decision that matters most in Maryland:

• No expedite ($100 base only): SDAT reviews the filing during the second calendar month after submission. Submit in September, and it's reviewed in November.
• Expedited (+$50): initial review falls between 7 and 14 business days; SDAT says expedited filings aren't reviewed before the 7th business day.
• Online rush (+$325): submitted before 2:30 p.m. on a business day, it's reviewed within three hours.

Most owners who need the LLC for a lease, a bank account, or a contract should pay the $50. When you form with Mainstay Filing, that expedite is already included.

What goes in the Articles

• LLC name with its required designator
• Purpose, which is optional
• Principal office address in Maryland
• Resident agent name and Maryland address
• Signature of the authorized person or persons forming the company
• Resident agent's consent, signed on the form

What you leave out

You do not list your members, spell out ownership percentages, describe your day-to-day operations, or share any financials. The Articles are a short formation document. All of the internal detail lives in your operating agreement, which stays private.

An operating agreement is your LLC's internal rulebook. Maryland does not require you to file it and it never appears in any public database, but you should have one in place before you start doing business, add members, or open a bank account.

What a solid operating agreement covers

• Ownership: who the members are and what percentage each holds
• Capital contributions: what each member put in and any future obligations
• Profit and loss allocation: how gains and losses are split, which does not have to track ownership percentage but usually does
• Distributions: when and how cash goes out to members
• Management: whether the LLC is member-managed or manager-managed, and who has authority to do what
• Voting: how decisions get made and which ones require a full member vote
• Transfers: what happens when a member wants to sell or leave, including any right of first refusal
• Dissolution: the conditions for winding the company down and distributing assets

For a single-member LLC, the agreement reinforces that the company is a genuine separate entity, which matters to courts weighing liability protection, and most banks want to see it. For a multi-member LLC it is essential. Without it, Maryland's statutory defaults decide these questions for you, and those defaults rarely match what the owners had in mind.

An Employer Identification Number is the nine-digit federal tax ID that the IRS provides free of charge. Think of it as the company's Social Security number: 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 a business bank account, which nearly every bank ties to an EIN
• You have 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 advisors recommend getting an EIN anyway. It keeps your SSN off business paperwork and smooths out bank account opening.

How to apply

Apply through the IRS EIN Assistant at IRS.gov. It takes about ten minutes and the number is issued on the spot. You can print the confirmation and use the EIN the same day. The online application needs a US Social Security number or ITIN. If you do not have one, you apply by fax or mail using Form SS-4. When Mainstay Filing forms your LLC, we apply for the EIN for you once SDAT accepts the Articles.

Keeping business and personal money separate is not optional if you want the liability shield to hold. Pay personal bills from the company account, or run business income through your personal one, and you hand a plaintiff the argument that the LLC is a sham: grounds for a court to hold you personally liable.

What most banks want to see

• Your accepted Articles of Organization from SDAT
• Your IRS EIN confirmation
• Your operating agreement, which many banks ask for, so have it ready
• Government-issued ID for everyone who will sign on the account

Community banks and credit unions often move faster with brand-new LLCs than the big national chains, and several online business banks can open an account without a branch visit. Before you settle on one, weigh the monthly charges, any caps on transactions, and the minimum balance each requires.

Most of the compliance work is front-loaded into formation. After that, the recurring burden centers on one Maryland filing plus keeping your records current.

Annual Report and Personal Property Return

Every Maryland LLC files its annual report (Form 1, which is also the business personal property return) with SDAT by April 15 each year. This is a fixed date, not an anniversary. The fee is $300, and the personal property part has no separate fee. Late reports risk a penalty, and an LLC that hasn't filed the prior year's report is certified on a list right after September 30, after which it forfeits its right to do business in Maryland and to use its name. SDAT's MarylandSaves fee waiver can cover the fee for qualifying businesses, though the 2026 waiver required an exemption awarded before the end of 2025.

Resident agent maintenance

If your resident agent moves, resigns, or you switch to a new one, file a Resolution to Change Resident Agent/Principal Office with SDAT promptly. The fee is $25. A stale agent address leaves the LLC out of compliance even when everything else is current.

Tax filings

Federal treatment depends on your election. Single-member LLCs report on Schedule C, multi-member LLCs file Form 1065, and S-corp elections file Form 1120-S. Maryland imposes a state income tax, so plan for state filings as well, and register with the Comptroller of Maryland if you sell taxable goods or services and need to collect sales tax.

Licenses and permits

Maryland has no single statewide business license. Many trades need professional licenses, most counties require a business license tied to your activity, and some cities add their own. These follow their own renewal cycles and are separate from your SDAT filings.