LLC Formation Compared › South Dakota
LLC formation services compared in South Dakota (2026)
The South Dakota filing fee is $150. With a registered agent, Mainstay Filing (our best overall pick) comes to $349 in year 1; the other four services range from $150 to $399.
- Official sources, checked October 20, 2026
- Prices verified October 2026
Year-1 cost of each service in South Dakota
| Service | First-year price (with agent) | Year-1 total |
|---|---|---|
| Bizee | $0 Basic package, agent free the first year | $150 |
| Northwest Registered Agent | $39 package, agent included the first year | $189 |
| ZenBusiness | $0 Starter package plus $99 agent | $249 |
| Mainstay Filing | Included | $349 |
| LegalZoom | $0 Basic package plus $249 agent | $399 |
South Dakota filing details
- State filing fee
- $150
- Formation document
- Articles of Organization
- Filed with
- South Dakota Secretary of State
- Yearly state report
- Annual Report, every year: $55
- Registered agent
- Required. A commercial registered agent listed with the state, a noncommercial agent (an individual or entity with a South Dakota address), or the title of an office in the company.
Mainstay Filing
$199 + $150 state fee = $349 in year 1
- LLC formation, prepared and filed
- Registered agent, all year
- EIN application (with an SSN or ITIN)
- Annual report filed every year it is due where the state requires one
- Compliance reminders and stored documents
Price from the Mainstay Filing pricing and FAQ pages, checked October 21, 2026. State fees are passed through at cost and shown before you pay.
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South Dakota questions
How much does it cost to form an LLC in South Dakota with a service?
In year 1, from $150 (Bizee) to $399 (LegalZoom), with a registered agent and South Dakota’s $150 filing fee included. Mainstay Filing is $349.
What does South Dakota charge to file an LLC?
$150, paid to the South Dakota Secretary of State for the Articles of Organization. Every service on this page adds that fee on top of its own price.
Do I need a registered agent for a South Dakota LLC?
Yes. A commercial registered agent listed with the state, a noncommercial agent (an individual or entity with a South Dakota address), or the title of an office in the company.
Is the cheapest first year the cheapest LLC?
Not always. Bizee is lowest in year 1, but the agent price changes after the first year for Bizee, Northwest Registered Agent and ZenBusiness, while Mainstay Filing stays at $199.
Sources
- SDCL 47-34A-203 (articles of organization); fee set by SDCL 47-34A-212 (multira state research spine): sdlegislature.gov/Statutes/47-34A-212, checked August 12, 2026
- South Dakota formation fee: Filing fee, official source read 2026-10-01: sdsos.gov/general-information/filing-fees.aspx, checked October 1, 2026
- South Dakota formation fee: Filing fee, official source read 2026-10-01: sdlegislature.gov/api/Statutes/47-34A-212.html, checked October 1, 2026
- South Dakota Secretary of State, Business Services / Corporations Division (multira state research spine): sdsos.gov/docs/business/llc-domestic-annualreport.pdf, checked August 12, 2026
- South Dakota Secretary of State, Business Services / Corporations Division (multira state research spine): sosenterprise.sd.gov/BusinessServices/Business/AnnualReportInstr.aspx, checked August 12, 2026
- South Dakota yearly filing: Annual report: fee and how, official source read 2026-10-01: sdlegislature.gov/api/Statutes/59-11-24.html, checked October 1, 2026
- South Dakota report due date (multira state research spine, due dates verified 714/714): sdlegislature.gov/Statutes/47-34A-211, checked August 12, 2026
- South Dakota registered agent statute (SDCL 59-11-6): sdlegislature.gov/Statutes/59-11-6, checked October 20, 2026
Provider prices: each company’s own pages, checked October 2026 (see sources and method).