You can find Maryland business entity information, including the entity name, type, Department ID, and formation details, through the Maryland Business Express entity search, run by the Maryland Department of Assessments and Taxation (SDAT). Searches are free and no account is required. Most business documents filed after August 2001 can be viewed at no charge through the SDAT services page.

The portal accepts three identifiers: business name, Department ID, and Employer Identification Number (EIN). A name search returns the company information and Department ID number, so you can start with the name even if you have nothing else on hand.

Summary table: finding your Maryland entity information

The table below shows where each data point lives in Maryland's records and the format it takes.

How to search for Maryland business entities

Access the Maryland business entity search to look up any registered business by name, Department ID, or EIN. A name search returns the company information and the Department ID, and the entity detail page shows the Department ID along with a Filing History tab. Note that Maryland uses the term "resident agent" rather than "registered agent"; the role is the same one covered in our guide to Maryland resident agent requirements.

What you'll see in search results

The General Information tab of an entity's detail page shows:

• Legal entity name

• Business type (LLC, Corporation, LP, Sole Proprietorship, General Partnership)

• Department ID (letter prefix followed by eight digits)

The detail page also carries a Filing History tab listing the documents filed with SDAT, starting with the original formation filing.

How to find your entity number in Maryland

Your Maryland entity number, officially called the Department ID, begins with a letter that corresponds to the entity type followed by eight digits. SDAT assigns it when your entity is formed and uses it to track the business in state records.

Where to locate your Maryland Department ID

Start with the fastest method, then fall back to your paperwork if you need a second source.

1. Maryland entity search (fastest method): The Department ID appears in your search results, labeled "Department ID."

2. SDAT confirmation letter: Printed on the confirmation letter you received after filing your formation document with SDAT, and also on a Certificate of Status if you purchase one.

3. Annual reports and state correspondence: A required field on Form 1, Maryland's annual report. SDAT warns that annual reports filed without a Department ID may not be accepted, causing delays and possible late fees, and asks that you include it on all communications with the Department.

Maryland Department ID format: one letter followed by eight digits, nine characters total. Example: W12345678 for a domestic LLC. Per SDAT's Form 1 instructions, W is a Domestic Limited Liability Company, Z is a Foreign Limited Liability Company, D is a Domestic Stock or Non-Stock Corporation, F is a Foreign Corporation, M is a Domestic Limited Partnership, and P is a Foreign Limited Partnership.

How to find your entity type in Maryland

Maryland recognizes numerous business entity types, and your search results list the type exactly as SDAT designates it. Corporations are designated as Stock or Non-Stock, with narrower categories such as religious corporations recognized under state law. Maryland uses "Nonstock Corporation" rather than "not-for-profit corporation" as its official designation.

Where to find your Maryland entity type

Check the search portal first, then your formation documents or annual reports for a second source.

1. Maryland entity search (most accessible): Displayed on the entity detail page as the business type, for example Domestic Limited Liability Company, Domestic Stock Corporation, or Foreign Limited Partnership.

2. Articles of Organization or Incorporation: Your formation document states the specific entity type being formed, using Maryland's official designations.

3. Annual reports: Form 1 lists each official business type alongside its Department ID prefix.

How to find your formation date in Maryland

Your formation date is the date SDAT accepted your formation documents. Under § 1-206 of the Corporations and Associations Article, all charter documents are effective when accepted unless the article provides otherwise. SDAT does not publish a separately labeled "formation date" field; the acceptance date of the formation filing is what appears in Filing History.

Where your Maryland formation date appears

1. Maryland entity search: The Filing History tab lists every document filed, starting with the original formation filing.

2. Articles of Organization or Incorporation: The copy SDAT returns to you after processing corresponds to the filing it accepted.

3. Annual report timing: Your first annual report is generally due April 15 of the year after formation, tracking SDAT's fixed filing date rather than your formation anniversary; confirm the current deadline against SDAT's instructions each year.

Formation date vs. effective date: For Maryland corporations, § 2-102(b)(1) of the Corporations and Associations Article permits a delayed effective date, set in the articles, of no later than 30 days after SDAT accepts the articles for record. If no delayed date is specified, the acceptance date is both the formation date and the effective date under § 1-206. For Maryland LLCs, the § 1-206 default governs: Articles of Organization take effect when SDAT accepts them for record.

Track your Maryland entities with Discern

Whether you just worked through Maryland LLC formation requirements for a single entity or manage a portfolio, getting your Department ID, entity type, and formation date into Discern keeps those details in one place instead of scattered across confirmation letters and portal logins. Discern can also track your Maryland April 15 annual report deadline, prepare the filing in advance using your centralized entity data, and act as your Maryland resident agent.

Across a multi-state portfolio, Discern also files annual reports, handles foreign qualification including obtaining certificates of good standing, and calculates and files Delaware franchise tax, so one platform covers your SOS compliance no matter how many states you operate in.

Book a demo with Discern.

Frequently asked questions about Maryland entity searches

These answers cover common questions about using SDAT's records to find your entity details.

Is the Maryland business entity search free to use?

Yes. Searching is free and requires no account, and most documents filed after August 2001 can be viewed online at no charge through the SDAT services page.

What's the difference between a Department ID and an EIN?

The Department ID is a state-assigned number, one letter followed by eight digits, that SDAT uses to track your entity in Maryland's records. Your EIN is a separate federal tax ID issued by the IRS. The Maryland Business Express search accepts either one, along with a business name, as a way to locate your entity.

Why can't I find a "formation date" field in Maryland's search results?

SDAT doesn't label a field "formation date." Instead, the Filing History tab on your entity's detail page lists every document filed, and the acceptance date on the original formation filing is the date to use.

Does Maryland allow LLCs to set a delayed effective date?

No. For Maryland LLCs, § 1-206 of the Corporations and Associations Article governs: Articles of Organization take effect when SDAT accepts them for record, with no option to delay. Maryland corporations work differently under § 2-102(b)(1), which permits a delayed effective date of up to 30 days after acceptance if one is specified in the articles.