LLC Services Compared › South Dakota
The three-year cost of a South Dakota LLC (2026)
South Dakota charges $150 to file an LLC. Over three years, with a registered agent and the state’s report fees, Mainstay Filing (best overall) totals $857; the other four services total $549 to $1,007.
- Official sources, checked October 20, 2026
- Prices verified October 2026
Year by year
| Service | Year 1 | Year 2 | Year 3 | Service total | With state costs |
|---|---|---|---|---|---|
| Mainstay Filing | $199 | $199 | $199 | $597 | $857 |
| Northwest Registered Agent | $39 | $125 | $125 | $289 | $549 |
| ZenBusiness | $99 | $199 | $199 | $497 | $757 |
| Bizee | $0 | $149 | $149 | $298 | $558 |
| LegalZoom | $249 | $249 | $249 | $747 | $1,007 |
Mainstay Filing
$199 / year, $857 over three years with South Dakota costs
- 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.
South Dakota state costs
- Filing fee
- $150 for the Articles of Organization, to the 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.
South Dakota questions
What does an LLC cost in South Dakota over three years?
State costs are $260 ($150 to file, plus 2 reports at $55). Adding a service and registered agent gives $549 (Northwest Registered Agent) to $1,007 (LegalZoom). Mainstay Filing is $857.
Does South Dakota require an annual report?
Annual Report, every year: $55.
Why do the services differ most after year one?
Agent pricing: Northwest Registered Agent $39 then $125 a year, Bizee free then $149, ZenBusiness $99 then $199, LegalZoom $249, Mainstay Filing $199 flat.
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.