How to Start a Business in Maryland (2026)

Fact-checked by the LegalGlass editorial team against primary sources · Published Aug 6, 2026 · Last updated Sep 10, 2026

To start a business in Maryland: pick a structure, register the entity with the Maryland State Department of Assessments and Taxation (SDAT) (an LLC needs a registered agent), get a free EIN from the IRS, register for taxes with the Comptroller of Maryland, and obtain the local and professional licenses your activity requires.

Quick Answer

Structure: Sole proprietor, partnership, LLC, or corporation
Formation: LLC/corporation filed with the Maryland State Department of Assessments and Taxation (SDAT)
EIN: Free from the IRS; needed to hire and open accounts
State tax: Register with the Comptroller of Maryland for sales/withholding as needed
Licenses: Local + professional licenses by activity and location
Registered agent: Required for a Maryland LLC or corporation

Step 1: Choose a Business Structure

Your first decision is legal structure, because it drives liability, taxes, and paperwork. A sole proprietorship is the default for a single owner with no filing, but it offers no liability shield. An LLC creates a separate legal entity and limited liability, while a corporation suits businesses seeking outside investment.

For federal tax, an LLC is flexible: a single-member LLC is a disregarded entity by default and a multi-member LLC is a partnership, and either can elect S-corporation treatment. Compare the trade-offs in S-corp vs LLC and the SBA's structure guide before committing.

Step 2: Register the Entity with the Maryland State Department of Assessments and Taxation (SDAT)

If you form an LLC or corporation, file the formation document with the Maryland State Department of Assessments and Taxation (SDAT) and appoint a registered agent with a physical Maryland address. Check that your name is available and distinguishable using the Maryland entity search first.

See Maryland articles of organization for the LLC formation document and required contents. A sole proprietor skips this filing but may file a DBA to operate under a trade name. The state fee is set by the Maryland State Department of Assessments and Taxation (SDAT) fee schedule; verify the current amount before filing.

Step 3: Get a Federal EIN

Apply for an Employer Identification Number from the IRS. It is free, and the online application issues the number immediately. You need an EIN to hire employees, open a business bank account, and file most business tax returns; a multi-member LLC and any entity with employees must have one.

A single-member LLC with no employees can sometimes use the owner's Social Security number, but getting an EIN is still recommended to keep finances separate and reduce identity exposure. Beware of third-party sites that charge for an EIN; the IRS never charges. See how to get an EIN for the walkthrough.

Step 4: Register for Maryland Taxes

Register with the Comptroller of Maryland for the taxes your business triggers. If you sell taxable goods or services, get a sales-tax or seller's permit before your first sale. If you hire employees, register for income-tax withholding and unemployment insurance. Registration is generally free.

Understand your federal obligations too: owners of pass-through businesses generally pay self-employment tax and make quarterly estimated payments. Review Maryland LLC tax filing and business tax basics so you set aside enough and file on time.

Step 5: Get Licenses and Permits

Maryland generally has no single statewide business license, so licensing is activity- and location-based. Obtain any local city or county business license where you operate, and any professional or industry license your field requires. Home-based businesses may still need a home-occupation permit.

See Maryland business license requirements for the layered approach. Identify every regulator that touches your activity early, because professional licenses can involve exams, bonding, or insurance. Keep copies of every approval and diary the renewal dates.

Step 6: Open Accounts and Stay Compliant

With the entity, EIN, and registrations in place, open a dedicated business bank account to keep finances separate, which protects the liability shield and simplifies taxes. Consider business insurance appropriate to your risk, and set up bookkeeping from day one.

Ongoing compliance keeps the business in good standing: file any Maryland annual report, keep your registered agent current, renew licenses, and file taxes on schedule. If you ever wind down, follow how to dissolve an LLC in Maryland to close cleanly.

Filing Online vs. by Mail: Which Should You Choose

Most states, including Maryland, accept LLC and corporation formation documents both online - Maryland's SDAT offers this through Maryland Business Express - and by mailing a paper form directly to SDAT. Filing offices generally process documents in the order they are received, whether submitted online or by mail, so the format itself does not jump you ahead in line. Paper filing is still worth knowing about if you need a wet signature on file, are submitting a document type the online system does not yet support, or simply prefer a physical paper trail for your records.

For most new LLCs and corporations, online filing is the more practical choice: it is faster to submit, easier to track, and cuts out mail transit time. Mail filing can take longer just to reach the office and enter the queue, and correcting a mistake costs another full mailing round trip. Whichever method you use, run your Maryland entity search first and review Maryland articles of organization so the document is complete before you send it.

A Realistic Launch Timeline: What Order Things Happen In

Confirm your name is available and distinguishable before you file anything; a name that turns out to be taken is the single most common cause of delay. Once Maryland's SDAT registers your LLC or corporation, apply for your federal EIN - the IRS generally expects the entity to already exist. With the EIN in hand, register with the Comptroller of Maryland for the tax accounts your business needs, such as sales tax or withholding, then line up the specific local and professional licenses your activity and location require.

Only after those pieces are in place should you open your business bank account, since banks typically ask to see the state's stamped or approved formation document along with your EIN confirmation letter. Processing time varies with the filing method and how busy the office is, and no agency guarantees a turnaround date, so build in a buffer rather than advertising a firm launch date before your filing is confirmed.

Common Reasons a Formation Filing Gets Rejected

A handful of mistakes account for most rejected formation filings: the proposed name is not distinguishable from an existing entity already on file, the registered agent (resident agent) section is incomplete or lists a P.O. box instead of a physical street address, a required signature is missing, or the payment does not match the current fee - often because someone used an outdated form or copied a fee amount from a third-party site instead of the agency's own schedule.

You can avoid nearly all of these by using the current version of the form or online portal published by SDAT rather than an old PDF, confirming your registered agent details before you submit, and checking your name against the entity search first. Most agencies will tell you why a filing was rejected and let you correct and resubmit it, but that adds time you may not have if you are working toward a launch date.

Frequently Asked Questions

What are the steps to start a business in Maryland?

Choose a structure, register an LLC or corporation with the Maryland State Department of Assessments and Taxation (SDAT), get a free EIN, register for taxes with the Comptroller of Maryland, and obtain local and professional licenses for your activity.

How much does it cost to start a business in Maryland?

The main state cost is the entity filing fee set by the Maryland State Department of Assessments and Taxation (SDAT) fee schedule. An EIN and most tax registrations are free; local and professional licenses add their own fees.

Do I need an LLC to start a business?

No. You can operate as a sole proprietor with no formation filing, but an LLC adds a liability shield and a separate legal entity. Compare the options before deciding.

Is an EIN required?

An EIN is required if you have employees or a multi-member LLC, and it is recommended for most businesses to open a bank account and file taxes. It is free from the IRS.

Does Maryland require a general business license?

In most cases there is no single statewide license. You register for taxes with the Comptroller of Maryland and obtain the local and professional licenses your specific activity and location require.

Should I file online or by mail in Maryland?

Either works. Online filing through Maryland Business Express is typically faster to submit and easier to track, while mail filing directly with SDAT remains an option and may be necessary for certain documents. Check SDAT's current filing options before choosing.

What causes a business formation filing to be rejected?

The most common causes are a name that is not distinguishable from an existing entity, an incomplete or unsigned registered agent section, and paying the wrong fee. Running a name search first and using the current version of the state's form reduces the risk of rejection.

More Maryland business guides

Form an LLC Business License Dissolve an LLC Annual Report Articles of Organization Business Entity Search Certificate of Formation DBA Filing LLC Tax Filing Operating Agreement Registered Agent LLC Cost

Sources

Maryland State Department of Assessments and Taxation (SDAT) - Business division (formation, filings, and fee schedule).
Maryland Business Express - Register a business online.
Comptroller of Maryland - business and tax registration.
Comptroller of Maryland - Sales and use tax.
SBA - Register your business (SBA).
SBA - Choose a business structure (SBA).
SBA - Apply for licenses and permits (SBA).
USA.gov - Start your own business (USA.gov).
IRS - Get an Employer Identification Number (free EIN).
IRS - Business Structures.
IRS - Limited Liability Company (LLC) federal classification.

LegalGlass provides general information for educational purposes and is not a law firm or a substitute for advice from a licensed attorney or tax professional. Laws, fees, and thresholds change; verify current requirements with the Maryland State Department of Assessments and Taxation (SDAT) and Comptroller of Maryland and the IRS before acting.