3 Best Foreign Registration Services in South Dakota (2026): Your Questions Answered
Ask about Mainstay Filing ($199), South Dakota Registered Agent.co ($199) and SD Registered Agent.org ($199), in that order, when you need foreign registration services in South Dakota in 2026. The state fee is $750, the same for everyone, and three years of service fees run $397 to $497.
Answered by the Ask About LLC editorial team ·
The short answers
State fee to register
$750
Do you bring a certificate from home?
Yes, attach it
Afterward
$55, annual report
Who to ask
Mainstay Filing, South Dakota Registered Agent.co then SD Registered Agent.org
Who should you ask in South Dakota?
The order follows our five questions: three-year cost first, then how much the price covers.
1Our first answer
1. Mainstay Filing: best for registering in many states
Registering costs $199, then $149 a year for the agent
Mainstay Filing is the one to ask first in South Dakota because registering costs $199 and the registered agent is free until year two.
The extra $100 over three years, compared with South Dakota Registered Agent.co, pays for coverage beyond South Dakota.
The registered agent is free in year one and $149 a year after, in any state.
What the price covers
Out-of-state registration handled
Registered agent, no charge the first year
One service fee for all fifty states
Good news
$199 to file the registration
Agent costs nothing the first year
Fifty states covered
The catch
South Dakota Registered Agent.co renews its agent $50 lower
Registering costs $750 at the state, plus $199 if you hire help.
Over three years the state's fees reach $860, counting any recurring report. sdsos.gov, read in October 2026 for this answer
What registers the LLC?
The South Dakota Secretary of State handles it: submit the Application for Certificate of Authority, Foreign Limited Liability Company there and the LLC is registered once accepted.
Attach certificate of Existence.
What do I owe once the LLC is registered?
Afterward comes a annual report at $55.
When the filing is due, per the state: 1st of the anniversary month.
Why is the list in this order?
On chores the price takes care of, worth 29%, Mainstay Filing comes out ahead.
62% of the score comes from what you pay over three years and chores the price takes care of.
With two states in play, a provider for every state ranks above South Dakota Registered Agent.co.
Every line above points to the state's own page. The total under them is ours, and it covers the filing, two reports and any minimum tax, nothing that varies by newspaper or county.
Questions people also ask
Do I still need an agent in my home state?
Yes, and the two states do not share a rule book. Mainstay Filing works in both, so one account can cover the home state and this one.
What do the picks cost over three years?
Three-year totals: Mainstay Filing $497, South Dakota Registered Agent.co $397, SD Registered Agent.org $397, with state fees on top.
Where do these numbers come from?
Official South Dakota sources back the state side, and posted company prices back the service side.
Do I have to use a service?
No. What the law asks for is a filing, and it does not say who has to send it.
Will a service file the registration for me?
Yes, filing is part of what each company on this page sells, and the state's fee is identical whoever sends it.
Who should I ask first about a foreign registration service in South Dakota?
Mainstay Filing comes first: $199 over the state fee registers you, the registered agent is free in year one and then it is $149 a year. Next are South Dakota Registered Agent.co and SD Registered Agent.org.
Sources for this answer
Ask-about note for South Dakota Secretary of State: the state publishes it at sdsos.gov, confirmed August 2026, so you can look it up yourself
Ask-about note for South Dakota Secretary of State: the state publishes it at sosenterprise.sd.gov, confirmed August 2026, so you can look it up yourself
Ask-about note for South Dakota yearly filing: Annual: the state publishes it at sdlegislature.gov, confirmed October 2026, so you can look it up yourself
Ask-about note for South Dakota report due date: the state publishes it at sdlegislature.gov, confirmed August 2026, so you can look it up yourself
Ask-about note for SDCL 47-34A-203: the state publishes it at sdlegislature.gov, confirmed August 2026, so you can look it up yourself
Ask-about note for South Dakota formation fee: Filing: the state publishes it at sdsos.gov, confirmed October 2026, so you can look it up yourself
Ask-about note for South Dakota formation fee: Filing: the state publishes it at sdlegislature.gov, confirmed October 2026, so you can look it up yourself
Ask-about note for South Dakota registered agent statute: the state publishes it at sdlegislature.gov, confirmed October 2026, so you can look it up yourself
Ask-about note for South Dakota Secretary of State: the state publishes it at sdsos.gov, confirmed October 2026, so you can look it up yourself
Ask-about note for Foreign LLC application for Certificate: the state publishes it at sdsos.gov, confirmed October 2026, so you can look it up yourself
Ask-about note for SDCL 47-34A-1003, transacting business: the state publishes it at sdlegislature.gov, confirmed October 2026, so you can look it up yourself
Ask-about note for SDCL 47-34A-1008, effect of not: the state publishes it at sdlegislature.gov, confirmed October 2026, so you can look it up yourself
Ask-about note for SDCL 47-34A-1001 to 47-34A-1009, foreign: the state publishes it at sdlegislature.gov, confirmed November 2026, so you can look it up yourself
The Mainstay Filing South Dakota service page, as it stood on November 13, 2026
The South Dakota Registered Agent.co pricing page, as it stood on November 13, 2026
The SD Registered Agent.org pricing page, as it stood on November 13, 2026