3 Best Registered Agents in South Dakota (2026), Plainly Answered
Our 2026 answer for South Dakota: South Dakota Registered Agent.co ($99 a year), Mainstay Filing ($149 a year) and SD Registered Agent.org ($99 a year), best first. Year one is $99 to $149. Three years come to $297 to $447.
By the Plain Charter editorial team ·
Short version
Do you need one?
Must have one
Name in the statute
Registered agent
Service price
$99 to $149 per year
Who we'd use
South Dakota Registered Agent.co, Mainstay Filing then SD Registered Agent.org
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.
Qualify, and you can fill the role yourself for free.
What will the agent cost me?
$99 to $149 yearly. Over three years, $297 to $447.
Your choice of agent leaves state fees unchanged.
What will the agent handle?
It accepts court papers and state mail for your LLC at an address in South Dakota.
We add the filing, two years of reports and any minimum tax for the three-year line. Publication and other variable costs are excluded.
People also ask
Can I be my own agent?
Usually yes: check the two rules above, who qualifies and the address.
What kind of address is required?
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.
How do the three-year costs compare?
South Dakota Registered Agent.co $297, Mainstay Filing $447 and SD Registered Agent.org $297
Where do you get the fees?
South Dakota's own publications for the state side, published company prices for the rest.
Does the state require a service?
Not required. Services charge for doing the paperwork for you.
Which registered agent would you pick in South Dakota?
South Dakota Registered Agent.co first: three years cost $297 if the company never leaves South Dakota. Mainstay Filing and SD Registered Agent.org follow.
Sources for this page
August 2026: South Dakota Secretary of State, sdsos.gov