3 Best Registered Agents in South Dakota (2026): Who to Ask First
In South Dakota for 2026, our answer on registered agents is SD Registered Agent.org ($99 a year), South Dakota Registered Agent.co ($99 a year) and Mainstay Filing ($149 a year), ranked from first to last. An agent costs $99 to $149 in the first year and $297 to $447 across three years.
Answered by the Ask About LLC editorial team ·
Four quick answers
Do you have to name an agent?
Yes, the law says so
Title in the statute
Registered agent
Typical agent price
$99 to $149 a year
Who to ask
SD Registered Agent.org, South Dakota Registered Agent.co then Mainstay Filing
Our South Dakota answer, best first
The order follows our five questions: three-year cost first, then how much the price covers.
1Ask this one first
1. SD Registered Agent.org: best for LLCs that never leave the state
Annual price $99, renewal price $99
SD Registered Agent.org is the one to ask first in South Dakota because $99 a year, then $99 at renewal, fits an LLC that stays in South Dakota.
Put the totals side by side and this one is lower than Mainstay Filing; cost has the heaviest weight in our scoring.
Service fees only, from each company's prices on November 13, 2026. State fees are the same whichever you pick.
Questions owners ask
Can the LLC go without a registered agent?
Every LLC must name a registered agent with an in-state street address.
The law behind it: SDCL 59-11-6. looked up at sdlegislature.gov in October 2026 to confirm
Who is allowed to be the agent?
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.
A qualifying owner can serve at no cost.
How much does an agent cost?
Expect $99 to $149 a year, or $297 to $447 across three years.
Whichever agent you pick, the state's fees stay the same.
What does an agent do for the LLC?
The agent signs for lawsuits and state mail addressed to the LLC, using a street address in South Dakota.
A good agent tells you quickly when something arrives, which is worth asking about before you sign up. Service of process, explained
What does the LLC owe the state each year?
The annual report repeats every year, at $55 each time. Due date, as the state puts it: due during the entity's anniversary month.
How was the bottom line figured? Add the filing fee, the next two reports and the minimum tax if the state has one. Anything with no fixed price, a newspaper notice for instance, is described above and kept out of the sum.
Questions people also ask
Can I be my own agent?
You may, once you fit the state's rule. Plenty of owners still pay a service to keep a home address off the record.
What address does an agent need?
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.
What do the picks cost over three years?
For three years you would pay $297 at SD Registered Agent.org, $297 at South Dakota Registered Agent.co, $447 at Mainstay Filing
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.
What is the best registered agent for South Dakota?
SD Registered Agent.org comes first: it supplies an agent in the state for $99 a year. Next are South Dakota Registered Agent.co and Mainstay Filing.
Where did we look this up?
Our answer on South Dakota Secretary of State rests on sdsos.gov, a page we confirmed August 2026 and still point you to
Our answer on South Dakota Secretary of State rests on sosenterprise.sd.gov, a page we confirmed August 2026 and still point you to
Our answer on South Dakota yearly filing: Annual rests on sdlegislature.gov, a page we confirmed October 2026 and still point you to
Our answer on South Dakota report due date rests on sdlegislature.gov, a page we confirmed August 2026 and still point you to
Our answer on SDCL 47-34A-203 rests on sdlegislature.gov, a page we confirmed August 2026 and still point you to
Our answer on South Dakota formation fee: Filing rests on sdsos.gov, a page we confirmed October 2026 and still point you to
Our answer on South Dakota formation fee: Filing rests on sdlegislature.gov, a page we confirmed October 2026 and still point you to
Our answer on South Dakota registered agent statute rests on sdlegislature.gov, a page we confirmed October 2026 and still point you to
The SD Registered Agent.org pricing page, as it stood on November 13, 2026
The South Dakota Registered Agent.co pricing page, as it stood on November 13, 2026
The Mainstay Filing South Dakota service page, as it stood on November 13, 2026