You can find your South Dakota business entity information, including entity name, type, number, and formation date, through the SD Secretary of State business search portal. This database provides access to the key details you need for compliance and business transactions.

Here, we'll walk you through exactly how to search the South Dakota database, where to find each piece of information, and what format each data point takes in South Dakota's system.

Summary table: finding your South Dakota entity information

The table below shows where to find each piece of South Dakota entity information and what format to expect.

How to search for South Dakota business entities

The South Dakota SOS operates a free portal titled "Business Information Search." Navigate to the South Dakota Business Search portal and enter your business name in the search field. The system supports partial matches through both "Starts With" and "Contains" options, though using your complete legal name produces the most precise results. Two search methods are available via radio button toggle: a name search and a Business ID search. An "Active Entities Only" checkbox lets you filter results to currently active entities or return all entities regardless of status.

Click your entity name in the results to view complete details, including your entity number, formation date, South Dakota registered agent details, and filing history. South Dakota's portal makes this information accessible without requiring logins or fees for basic searches.

What you'll see in search results

• Legal entity name

• Entity type (LLC, Corporation, LLP, LP, Nonprofit Corporation, etc.)

• Business ID (South Dakota's unique identifier)

• Formation/file date

• Current status (Active, Inactive, Dissolved, etc.)

• State of formation

How to find your entity number in South Dakota

Your South Dakota entity number, officially labeled "Business ID," is an alphanumeric identifier assigned by the South Dakota Secretary of State when your entity is formed. For LLCs, see South Dakota LLC formation requirements for details on the formation process. No public Business ID format or prefix specification appears in the SOS's publicly available guidance. If you need to confirm your Business ID, search for your entity on the SOS enterprise portal or contact the Business Filings Office at (605) 773-4845.

Your Business ID appears prominently in the online search results, on your Certificate of Formation or Organization, and on all official South Dakota Secretary of State correspondence, including South Dakota annual report filings. It serves as your account identifier for annual report filings.

How to find your entity type in South Dakota

South Dakota recognizes a range of business entity types in its SOS filing system. The SD SOS entity types page currently lists business corporations, professional corporations, nonprofit corporations, LLCs, series LLCs, professional limited liability companies (PLLCs), limited liability partnerships (LLPs), limited partnerships (LPs), cooperatives, and business trusts. The SOS distinguishes between domestic (organized in South Dakota) and foreign (organized in another state) filings for corporations, LLCs, nonprofit corporations, and most partnership forms. Whether a particular cooperative or business trust filing is treated as domestic or foreign depends on its organizing jurisdiction and applicable statutes. Your entity type appears in search results, on your formation documents, and on annual reports.

Professional entity types are recognized under South Dakota statute, with PLLCs governed primarily by chapter 47-11F (including SDCL 47-11F-3), and professional corporations and professional LLCs governed by chapter 47-13A (including SDCL 47-13A-2). Professional limited liability partnerships are governed elsewhere, primarily under Title 59 (Partnerships) and the relevant professional licensing statutes. Professional status is indicated through an appropriate designation in the entity's name, such as "Professional Corporation," "PC," "Professional Limited Liability Company," or "PLLC." South Dakota typically permits both punctuated and unpunctuated abbreviations (for example, "PC" or "P.C.," "LLC" or "L.L.C.") so long as the designation satisfies the statutory naming rules.

How to find your formation date in South Dakota

Your formation date (when the South Dakota Secretary of State officially filed and approved your business entity) appears in search results as "Filing Date" in MM/DD/YYYY format, on your Certificate of Formation/Incorporation, and on annual report confirmations. Annual report deadlines vary by entity type: limited liability partnerships and certain other partnerships have a deadline expressed relative to the entity's formation year under SDCL 59-11-25, while corporations and LLCs have separate annual report provisions in chapters 47-1A and 47-34A respectively. See SOS annual report instructions for filing details specific to your entity type.

Formation date vs. effective date

South Dakota allows business entities to select a delayed effective date for formation, with a maximum delay of 90 days after the filing date. Under SDCL 47-34A-206 for LLCs, if a delayed date exceeding 90 days is accidentally specified, the filing automatically becomes effective on day 90. Under SDCL 47-1A-123.1 for corporations, the statute frames the 90-day limit as a strict prohibition, meaning the date "may not be later than" the 90th day after filing.

Manage South Dakota compliance with Discern

Whether you have one South Dakota LLC or fifty entities across multiple states, Discern's automated compliance platform tracks your filing deadlines and manages registered agent services so nothing falls through the cracks. The platform automates South Dakota's annual report tracking alongside your other state obligations.

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