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How to Check If an LLC Name Is Available in South Dakota

Last verified: November 2, 2026 · Sources are cited at the bottom of this page.

The short answer

Short answer: South Dakota's official search is the Secretary of State's FilingSearch on SOS Enterprise at sosenterprise.sd.gov. It is free. The trap: the results mix legal entity names and fictitious (DBA) names in one table — the Name Type column is the only thing that tells them apart, and most people skip it. A hit that looks like a competing company may be someone's DBA, and a foreign LLC's approved fictitious name is part of the very test your name has to pass.

The official search

The registry is run by the South Dakota Secretary of State, Business Services Division.

The database covers domestic and foreign corporations, LLCs (including series LLCs), limited partnerships, and LLPs registered with the Secretary of State — and, in the same results, registered fictitious names. Sole proprietorships and general partnerships that have not registered a fictitious name do not appear. Trademarks are handled through a separate search tool on the same portal.

There is no separate "name availability" verdict that binds the state. You judge availability from the search results, and the Secretary of State makes the final distinguishability decision when your Articles of Organization are reviewed. (Registered agent lookups run through a separate RA Search tool on the portal.)

A results list shows the Business ID, Type, Name, Name Type, Filing Date, and Status of each record. Opening a record adds the registered agent, addresses, and a filing history that includes the entity's past annual reports. The state tracks three standings separately — Secretary of State status, annual report standing, and registered agent standing — so read all three on a record you care about. The record does not publish an LLC's members or managers as an ownership roster.

Step by step

  1. Open FilingSearch on sosenterprise.sd.gov and choose the Business Name search.
  2. Use "Contains" first, entering your name without "LLC." Contains finds your words anywhere in an existing name; the narrower "Starts With" mode can miss conflicts buried in the middle of a name.
  3. Run "Starts With" too, on a shortened version of your name, and on your most distinctive word alone.
  4. Read the Name Type column on every hit. Separate the legal entity names from the fictitious (DBA) names before you judge how crowded the name is.
  5. Do not leave "Active Entities Only" checked for your only pass. Inactive records — a recently dissolved near-twin, for example — are context you want before you commit to a name, even though active records are the ones that block you.
  6. If you already know a Business ID (it looks like DL035522), search by ID to go straight to that record and its filing history.
  7. If nothing conflicting appears, the name is probably available — but only the Secretary of State's review of your Articles is definitive.

South Dakota's name rules

The rules are in SDCL 47-34A-105 of the South Dakota Uniform Limited Liability Company Act.

Designator. The name must contain "limited liability company" or "limited company," or the abbreviation "L.L.C.," "LLC," "L.C.," or "LC." The word "limited" may be abbreviated "Ltd." and "company" may be abbreviated "Co."

Distinguishable. The name must be distinguishable upon the records of the Secretary of State from:

  1. The name of any corporation, limited partnership, or company incorporated, organized, or authorized to transact business in South Dakota
  2. A name reserved or registered under SDCL 47-34A-106 or 47-34A-107
  3. A fictitious name approved under SDCL 47-34A-1005 for a foreign LLC authorized to transact business in South Dakota because its real name was unavailable

When a too-close name can still be used. South Dakota's statute has built-in exceptions most states phrase more loosely. Under §47-34A-105(c)–(d), the Secretary of State can authorize a name that is not distinguishable if the existing holder consents in writing and undertakes to change its own name, if a court judgment establishes your prior right to the name, or in certain merger and acquisition situations where the other company is being absorbed or will change its name. These are exceptions to argue for, not a plan — an ordinary filing with a conflicting name and no consent will be rejected.

Reserving a name. A name may be reserved under SDCL 47-34A-106 for 120 days. The Secretary of State's fee schedule lists the reservation at $25, per the schedule as published by the Secretary of State. A reservation is optional — it does not establish an LLC.

What the search can't tell you

If the name looks available

File Articles of Organization with the Secretary of State, online through SOS Enterprise, or on paper.

Ongoing: the annual report.

FAQ

Is the South Dakota LLC name search free? Yes. FilingSearch on SOS Enterprise is free, and no login is needed to search.

What does the Name Type column mean? It tells you whether a result is a legal entity name or a fictitious (DBA) name. South Dakota returns both in the same results list, so check this column before deciding that a name is — or is not — blocked by a real company.

How much does it cost to form a South Dakota LLC? The Articles of Organization filing fee is $150 filed online, or $165 on paper including the $15 paper filing fee.

When is the South Dakota LLC annual report due? On the first day of your anniversary month each year — an LLC formed September 18 reports by September 1. The fee is $55 online or $70 on paper, and a $55 late fee applies once the report is delinquent.

Can I use a name that is already taken if the other company agrees? Possibly. Under SDCL 47-34A-105(c), the Secretary of State may authorize a non-distinguishable name if the existing holder consents in writing and undertakes to change its name, or if a court judgment establishes your right to use it.

Sources

Run the check now

Use the workflow tool below — it is pre-set to South Dakota and builds your printable checklist with the official links.

Name-Check Workflow Tool

Pick your state, choose your entity type, and type the name you want. The tool builds your step-by-step checklist — the official search, the trademark check, the domain check, and your filing options. It runs entirely in your browser; nothing you type is sent anywhere.