Foreign LLC Registration in South Dakota (2026): 5 Moves and the 3 Best Services
Best picks for registering an LLC from another state in South Dakota in 2026, in order: Mainstay Filing ($199), South Dakota Registered Agent.co ($199) and SD Registered Agent.org ($199). Budget $750 to the state and 5 moves of work.
Each company's listed price on November 13, 2026. Add the $750 state fee to every row.
The South Dakota registration, in order
Move 1
Decide if the LLC must register in South Dakota
Term to know: a foreign LLC is formed in another state. It registers before doing business there. Skip registration and: Its contracts remain enforceable (SDCL 47-34A-1008(b)).
Every LLC must name a registered agent with an in-state street address. The address has to be an actual street address or rural route box number in South Dakota, plus a South Dakota mailing address if it differs.
Finish and lodge the Application for Certificate of Authority, Foreign Limited Liability Company
The registration is the Application for Certificate of Authority, Foreign Limited Liability Company plus $750, addressed to the South Dakota Secretary of State.
Where this comes from: Source page sdsos.gov, October 2026
Move 5
Stay registered
Registered LLCs file the annual report ($55), 1st of the anniversary month.
The cost of this primer
Item
Pay to
Cost
Registration fee
To the state
$750
Annual report
To the state
$55
Paid help
The provider
$199 in year one
Three years of state fees
To the state
$860
State amounts are South Dakota's official fees (sources below); service prices come from each company's site. Three years of state cost is the filing, the reports in years two and three and any minimum tax.
Why Mainstay Filing is first
To-dos the price takes off you is 38% of the mark, and it is where moved ahead in South Dakota.
The LLC was formed in one state and works in another, so a provider that serves both scored best.
What founders ask
Which fees does South Dakota take from a foreign LLC?
$750 to the state. A service adds $199.
Which form do I file to register?
Use the Application for Certificate of Authority, Foreign Limited Liability Company; the South Dakota Secretary of State receives it.
Do I need a certificate from my home state?
Yes: certificate of Existence.
What if the LLC does business there without registering?
Its contracts remain enforceable (SDCL 47-34A-1008(b)).
What is due after registering?
The annual report keeps the registration alive, at $55.
Which service should handle the registration?
Pick Mainstay Filing: it files the South Dakota registration for $199 plus the state's fee, and the first agent year is on the house. Behind it: South Dakota Registered Agent.co and SD Registered Agent.org.