Form a Business in South Dakota
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Everything you need to form and maintain an LLC, Corporation, S-Corp, or DBA in South Dakota. Filing fees, ongoing requirements, and tax treatment current for 2026 — sourced from the South Dakota Secretary of State and the IRS.
South Dakota business formation overview
If you're forming a business in South Dakota, the four most common entity types are the LLC (most popular for solo founders and small partnerships), the C-Corporation (used by venture-funded startups), the S-Corporation (a tax election available to LLCs and corporations meeting IRS rules), and the DBA ("doing business as", a trade-name registration for sole proprietors and existing entities). Each has its own filing fee, ongoing report cycle, and tax treatment in South Dakota.
The cheapest path to a registered business in South Dakota is the LLC at $150 for the Articles of Organization. A C-Corporation costs $150 for the Articles of Incorporation, and a DBA registration is $10. After formation you'll have ongoing obligations: an annual report ($50, annual), a registered agent with a physical South Dakota address, and any applicable franchise or income tax: None.
South Dakota at a glance (2026)
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Frequently asked questions about forming a business in South Dakota
How much does it cost to form an LLC in South Dakota?
The state filing fee is $150 to file Articles of Organization with the South Dakota Secretary of State. Optional add-ons (registered-agent service, expedited filing, certified copies) are extra. See our cost breakdown for the full picture.
Does South Dakota require an annual report?
Yes — South Dakota requires an annual report at $50 (annual). Missing the deadline triggers late fees and eventually administrative dissolution.
What is the franchise tax in South Dakota?
None Always confirm rates with the South Dakota Department of Revenue or your tax advisor before filing.
Do I need a registered agent in South Dakota?
Yes. Every LLC and Corporation registered in South Dakota must designate a registered agent with a physical street address in the state who can accept legal process during business hours. You can serve as your own agent, appoint a co-owner, or hire a commercial registered-agent service.
Sources & further reading
Disclaimer: Legal information, not legal advice. For advice about your specific situation, consult a licensed attorney or CPA in your state. See our full disclaimer.