South Dakota Certificate of Formation (2026)

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

South Dakota creates an LLC by filing Articles of Organization - the state's formation document, sometimes informally called a certificate of formation - with the South Dakota Secretary of State for a $150 online filing fee. Filing is done online and processed quickly, and the document names the LLC, its registered agent, and its organizer. South Dakota has no state income tax.

South Dakota's LLC Formation Document

To create a limited liability company in South Dakota, you file the state's formation document with the South Dakota Secretary of State. People often search for a "certificate of formation," but South Dakota's formation document is technically the Articles of Organization, governed by the South Dakota Limited Liability Company Act. The terms refer to the same thing: the filing that legally brings the LLC into existence.

Until that document is filed and accepted, there is no LLC and no liability protection - the owners operate as individuals or a partnership. Once accepted, the LLC is a separate legal entity that can own property, enter contracts, and shield its members' personal assets from most business liabilities.

This page focuses on the South Dakota formation filing. For the broader steps of starting an LLC - name, agent, EIN, operating agreement, and taxes - see how to form an LLC in South Dakota and the national formation guide.

Agency and Online Filing

You file the Articles of Organization with the South Dakota Secretary of State. South Dakota strongly favors online filing through its business portal, which is faster and cheaper than paper. You create an account, complete the electronic articles, and pay by card, receiving prompt confirmation.

Online filing typically qualifies for the lower $150 fee, while paper filings generally cost more, so filing electronically saves both time and money. Processing is usually quick, and you can download a filed copy for your bank and records.

A registered agent with a South Dakota address must be in place before you file, since the agent is named in the articles. Check that your desired name is available in the business entity search first, so your filing is not rejected for a conflicting name.

Required Contents of the Articles

The Articles of Organization capture the core facts about the LLC. You generally provide:

• The LLC name, which must include an LLC designator (such as "LLC" or "Limited Liability Company") and be distinguishable from other entities on file;
• The registered agent and registered office in South Dakota that will receive service of process and official notices;
• The designated office address of the LLC;
• Whether the LLC is member-managed or manager-managed, and the organizer's information;
• The effective date, if you want a delayed start.

South Dakota's articles are streamlined; detailed governance rules belong in the operating agreement, which the state does not file. Accuracy matters, because the articles become the public legal record of your LLC, and errors can require a corrective amendment and additional fees.

Filing Fee and Processing Time

The state filing fee for South Dakota Articles of Organization is $150 when filed online; paper filings generally cost more, which is one reason South Dakota encourages electronic filing. This fee is the core cost of creating the LLC, and processing online is typically fast, with a filed copy available to download.

Because fee schedules change, confirm the current amounts on the Secretary of State portal before filing. See the South Dakota LLC cost page for the full picture of formation and ongoing fees.

After Filing: EIN, Operating Agreement, and Taxes

Filing the articles creates the LLC, but a few steps complete your setup. First, obtain a federal EIN from the IRS - it is free and needed to open a bank account, hire employees, and file taxes. See how to get an EIN in South Dakota.

Second, adopt an operating agreement. South Dakota does not require you to file one, but it governs ownership, management, and profit distribution internally and matters even for single-member LLCs. Third, register for state taxes with the South Dakota Department of Revenue if you will collect sales tax.

South Dakota has no state income tax, which simplifies taxation considerably - there is no state return on your business profits, and no separate state income filing to track each year. However, South Dakota does have a sales and use tax, so businesses selling taxable goods or services must obtain a sales tax license and file returns on the schedule the Department of Revenue assigns. By default the IRS taxes a single-member LLC as a disregarded entity and a multi-member LLC as a partnership, with an S-corporation election available once profits justify it.

Ongoing Requirements and Name Rules

After formation, a South Dakota LLC must file an annual report with the Secretary of State - generally $50 online - to stay in good standing, due by the first day of the anniversary month of formation. Missing it leads to late fees and eventual administrative dissolution, so calendar the due date each year. See South Dakota annual report.

Your LLC name must remain distinguishable on the state's records and continue to include a proper designator. If you want to operate under a different brand, you can file a fictitious business name; see South Dakota DBA filing. Remember that an entity-name filing is not a trademark.

Keeping your registered agent current, filing the annual report, and collecting any sales tax are the routine obligations that keep the LLC alive. The Articles of Organization start the entity; these ongoing steps maintain it, and because South Dakota has no income tax the annual report is the single most important recurring filing to remember. Governing rules appear in the South Dakota Limited Liability Company Act, codified at SDCL Chapter 47-34A.

Frequently Asked Questions

What is South Dakota's LLC formation document called?

South Dakota's formation document is technically the Articles of Organization, though it is sometimes informally called a certificate of formation or certificate of organization. It is filed with the Secretary of State to create the LLC.

How much does it cost to form an LLC in South Dakota?

The filing fee for the Articles of Organization is $150 when filed online; paper filings generally cost more. Confirm the current amount on the Secretary of State portal before filing, as fee schedules can change.

How do I file South Dakota Articles of Organization?

File online through the South Dakota Secretary of State business portal, which qualifies for the lower $150 fee. Name a registered agent with a South Dakota address before filing, and check name availability first.

Does South Dakota have a state income tax?

No. South Dakota has no personal or corporate income tax, so there is no state income tax return on your LLC's profits. South Dakota does have a sales and use tax, so businesses selling taxable goods or services need a sales tax license.

Does a South Dakota LLC file an annual report?

Yes. A South Dakota LLC files an annual report with the Secretary of State, generally $50 online, due by the first day of the anniversary month of formation. Missing it leads to late fees and eventual administrative dissolution.

Related

• How to Form an LLC in South Dakota
• South Dakota Registered Agent
• South Dakota Operating Agreement
• How to Get an EIN
• North Dakota Certificate of Formation (sibling)
• Wyoming Articles of Organization (sibling)

Sources

1. South Dakota Secretary of State - Business Services.
2. South Dakota Secretary of State - Business Forms and Fees ($150 online Articles of Organization).
3. South Dakota Secretary of State - Annual Reports.
4. South Dakota Secretary of State - Business Search (name availability).
5. South Dakota Department of Revenue - Business Taxes (sales and use tax).
6. South Dakota Department of Revenue - Sales and Use Tax.
7. South Dakota Legislature - SDCL Chapter 47-34A (Limited Liability Companies).
8. IRS - Limited Liability Company (LLC).
9. IRS - Get an Employer Identification Number.
10. IRS - Single Member LLCs.
11. IRS - Starting a Business.
12. Cornell Law School Legal Information Institute - Limited Liability Company (LLC).
13. Cornell Law School LII - Registered Agent.

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 South Dakota Secretary of State and the South Dakota Department of Revenue before acting.