Foreign LLC Services › South Dakota
Foreign LLC services in South Dakota, compared
In South Dakota a filing service costs $199 on top of the $750 state fee. Mainstay Filing is our first pick.
Best 3 Foreign Registration Services in South Dakota (2026)
Ranked for South Dakota.
| # | Service | Service fee | South Dakota fee | Agent |
|---|---|---|---|---|
| 1 | Mainstay Filing | $199 | $750 | Year one included, then $149/yr |
| 2 | SD Registered Agent.org | $199 | $750 | Year one included, then $99/yr |
| 3 | South Dakota Registered Agent.co | $199 | $750 | Year one included, then $99/yr |
Service prices read from each provider’s South Dakota page on October 28, 2026. The state fee is the official figure below and is paid to the South Dakota Secretary of State.
Side by side with doing it yourself
| Route | Service fee | Agent, year one | Agent after | Year one, before any agent |
|---|---|---|---|---|
| Mainstay Filing | $199 | Included | $149 a year | $949 |
| SD Registered Agent.org | $199 | Included | $99 a year | $949 |
| South Dakota Registered Agent.co | $199 | Included | $99 a year | $949 |
| Do it yourself | $0 | You arrange one | Your cost | $750 |
A registered agent must have a street address in South Dakota. Doing it yourself means you arrange and pay for one.
What the state requires either way
- Application
- Application for Certificate of Authority, Foreign Limited Liability Company
- File with
- South Dakota Secretary of State
- Good-standing certificate
- Certificate of Existence
- Yearly filing
- Annual report (South Dakota Secretary of State), $55 (due: 1st of the anniversary month)
South Dakota service questions
Which service is best for a foreign LLC in South Dakota?
We rank Mainstay Filing first for South Dakota: $199 plus the $750 state fee, with the agent free for the first year.
What does a South Dakota service include?
The application, the filing with the South Dakota Secretary of State, payment of the state fee and a registered agent for the first year.
Is it cheaper to file in South Dakota myself?
On paper, yes by $199: the state fee is $750. You would also need to find a registered agent and prepare Application for Certificate of Authority, Foreign Limited Liability Company.
Sources
- Filing fee schedule: sdsos.gov/general-information/filing-fees.aspx, checked October 8, 2026
- Foreign LLC application for Certificate of Authority: sdsos.gov/docs/business/foreignllccertificateofauthority20180215.pdf, checked October 8, 2026
- South Dakota Secretary of State, business services: sdsos.gov/business-services/corporations/contact.aspx, checked October 8, 2026
- SDCL 47-34A-1003, transacting business: sdlegislature.gov/api/Statutes/47-34A-1003.html, checked October 8, 2026
- SDCL 47-34A-1008, effect of not registering: sdlegislature.gov/api/Statutes/47-34A-1008.html, checked October 8, 2026