South Dakota Registered Agents (2026): Official Rules, State Fees and the 3 Best Agents
The 2026 South Dakota entry for registered agent service names Mainstay Filing ($149 a year), South Dakota Registered Agent.co ($99 a year) and SD Registered Agent.org ($99 a year), in that order. South Dakota insists on a registered agent for each LLC. On the almanac's yearly measure the state bill is $55 (30th of 50).
South Dakota registered agent rules as the state states them
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.
Eligible agents: 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. Cited law: SDCL 59-11-6.
Recurring charges on the state side
Mail about the annual report reaches your registered agent; the report costs $55 every year and falls due due during the entity's anniversary month.
Basis for the order
What set Mainstay Filing above South Dakota Registered Agent.co: requirements covered, at 28% of the score.
An agent you can keep in every state scored above South Dakota Registered Agent.co's lower price.
South Dakota FAQ
Is a registered agent compulsory in South Dakota?
It is. Every LLC must name a registered agent with an in-state street address.
Who is allowed to act as the registered agent in South Dakota?
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.
What does a South Dakota registered agent charge each year?
Plan on $99 to $149 a year.
What does the state charge an LLC every year?
$55 a year on the almanac's yearly measure, which is the annual report ($55 every year).
Which registered agents does this entry list?
Mainstay Filing ($149 a year), South Dakota Registered Agent.co ($99 a year) and SD Registered Agent.org ($99 a year), with the top entry leading.
Which registered agent should I choose?
Our entry order: Mainstay Filing ($149 a year, flat, from a provider active in all fifty states), then South Dakota Registered Agent.co and SD Registered Agent.org.