Secretary of State South Dakota business entity search
South Dakota's Business Information Search is free to use, and it looks up businesses by name or by Secretary of State Business ID.
Check a name against South Dakota's naming rules
- Type a business name above and press Check name. Its ending and any restricted words show here.
Get the matching domain name
Type a business name to check its .com, .net, .org and .us.
"Not registered" is the registry's answer at this moment. It is not a promise that the name can be bought at the standard price, since some unregistered names are reserved or sold at a premium. The buttons open Spaceship, a domain registrar, where the price is shown.
See an example check
Example: a check of "Blue Heron Bakery LLC" against South Dakota's rules.
- Ends with "L.L.C.", an ending South Dakota lists for an LLC.
- No ending from South Dakota's list for a corporation was found at the end of this name.
This checks the ending and the restricted words South Dakota publishes. It does not tell you whether another company already holds the name. Only the state's own search can show that.
A private website, not a government site. Every state entry links to that state's official search.
South Dakota Secretary of State's own search
- Run by
- South Dakota Secretary of State
- Called
- Business Information Search
- Search by
- business name, Secretary of State Business ID
The state's search is the record that counts. State Business Entity Search is not a government site.
The exact-name Business Name Availability search is a separate tool.
South Dakota filing fees for a new business name
| Filing | State fee | Details |
|---|---|---|
| Form an LLC in South Dakota | $150 | Domestic Articles of Organization. Source: South Dakota Secretary of State, filing fees. |
| Form a corporation in South Dakota | $150 | Domestic Articles of Incorporation. Source: South Dakota Secretary of State, filing fees. |
| Reserve a name in South Dakota | $25 | Held for 120 days. Source: South Dakota Secretary of State, filing fees. |
| Annual report for a South Dakota LLC | $55 | Every year. Before the first day of the second month of the year after the year the LLC was authorized, then by the same date each year. From 1 January 2027 an entity picks either its formation anniversary month or 31 January. Source: South Dakota Secretary of State, filing fees. |
| DBA business name, in South Dakota | $10 | Source: South Dakota Secretary of State, filing fees. |
Name endings South Dakota accepts
For an LLC (South Dakota Codified Laws 47-34A-105)
For a corporation (South Dakota Codified Laws 47-1A-401)
How the Business Information Search works
The Business Information Search looks up businesses by name or by Secretary of State Business ID. Its match options are Starts With and Contains, and an Active Entities Only box limits the results to active entities.
The state says information about individual business entities can be searched, viewed and printed with this tool for free. Use the Active Entities Only box when you only need to see companies that are still active. Use it to see a business's details once a name turns up.
The Business Name Availability search is a separate tool. It matches the exact name only, so spelling variations need the Business Information Search. The Secretary of State also reviews the name again when the formation document is processed.
What makes a South Dakota LLC name distinguishable
An LLC name must be distinguishable on the Secretary of State's records from the names of certain entities. Those are any corporation, limited partnership or company incorporated, organized or authorized to transact business in South Dakota. The statute lists them under 47-34A-105.
The name also has to be distinguishable from reserved or registered names. A name that is not distinguishable needs the other holder's consent or a court judgment.
Reserving a South Dakota name for 120 days
A reservation costs $25 and holds the name for 120 days. The statute says the Secretary of State reserves the name for the applicant's exclusive use for one hundred twenty days.
The same applicant may not reserve the same LLC name again until more than sixty days after the last 120-day period ends. Corporate reservations are nonrenewable.
Annual reports, late fees and filing on paper
Articles of Organization for a domestic LLC cost $150 when filed online and $165 on paper. The paper figure includes the paper filing fee.
The annual report costs $55 online and $70 on paper. The fee schedule lists a $55 late fee, while the annual report instructions list $50 for each late report. Filing on paper adds $15 to forms that can be filed online.
Trade names and DBA registration
A DBA, or fictitious business name, costs $10 to register with the Secretary of State. The DBA page on the state's site says a registration must be renewed every 5 years.
The DBA registry does not form an LLC or corporation, so a business still needs its own formation filing. The DBA fee is a separate payment from the formation fee. For the wider picture, see fictitious, assumed and trade names.
Checking and claiming a name in South Dakota
- Search the name in the Business Information Search, using both Starts With and Contains.
- Repeat the exact spelling in the Business Name Availability search.
- Check that the name ends with an ending from the endings each state accepts.
- Reserve the name for $25 if you need 120 days, or file Articles of Organization for $150 online or $165 on paper. Compare these figures with the LLC cost calculator.
South Dakota name search questions
Is the South Dakota Business Information Search free?
Yes. The Secretary of State says information about individual business entities can be searched, viewed and printed with this tool for free.
Does the South Dakota name availability search catch spelling variations?
No. The Business Name Availability search matches the exact name only, so variations need a separate check in the Business Information Search.
How long does a South Dakota name reservation last?
120 days, at a fee of $25. The same applicant may not reserve the same LLC name again until more than sixty days after the 120-day period ends.
How much is the South Dakota LLC annual report?
$55 when filed online and $70 on paper. Filing on paper adds $15 to forms that can be filed online.
Is a DBA in South Dakota the same as forming an LLC?
No. DBA business name registration with the Secretary of State does not form an LLC or corporation, and it must be renewed every 5 years.
After the South Dakota name check
- LLC cost calculatorSouth Dakota filing and report fees added up
- Business name rules by stateSouth Dakota's endings beside other states
- California business entity searchCalifornia Secretary of State
- Illinois business entity searchIllinois Office of the Secretary of State
- Maryland business entity searchMaryland State Department of Assessments and Taxation
- How to register a company nameSteps from choosing a structure to filing, with Washington's and Delaware's own formation steps.
- Can two businesses have the same name?Entity names, DBAs and trademarks each answer this differently, with wording from five state statutes.
7 official South Dakota sources
- South Dakota Secretary of State, Business Information Search, retrieved November 12, 2026.
- South Dakota Secretary of State, Business Name Availability search, retrieved November 12, 2026.
- South Dakota Secretary of State, filing fees, retrieved November 12, 2026.
- South Dakota Secretary of State, annual report instructions, retrieved November 12, 2026.
- South Dakota Secretary of State, DBA business name registration, retrieved November 12, 2026.
- South Dakota Codified Laws 47-34A-105, limited liability company names, retrieved November 12, 2026.
- South Dakota Codified Laws 47-34A-106, reservation of a limited liability company name, retrieved November 12, 2026.