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Formation Rated

Rankings of registered agents, LLC formation and foreign registration services in all 50 states.

Entry · South Dakota

South Dakota Registered Agent.co Review (2026)

From the Formation Rated editorial team
Line one for South Dakota Registered Agent.co: $99 a year for South Dakota registered agent service, with the same $99 at renewal. The plan includes an in-state street address for the registered office and online scans of papers served on the company. Line two: forming a South Dakota LLC costs $199 plus the state fee, first year of agent service included. Line three: foreign registration in South Dakota, $199 plus the state fee. Rating note: it suits a South Dakota-only company that wants a fixed agent amount and files its own annual report.
Rating note

South Dakota Registered Agent.co: rated for a South Dakota-only companies

$99 yearly

Our score9.0out of 10

A bare-bones South Dakota agent: flat amount, fixed renewal.

What you get

  • An in-state address on the public record
  • Each paper served on the company is scanned into your account

Pros

  • $99 a year, level on renewal
  • A lower yearly line than Mainstay Filing's agent
  • Also sells LLC formation and foreign registration
  • First agent year included when it forms your LLC

Trade-offs

  • Leaves the annual report line to you
  • EIN application is a separate $99 line
  • South Dakota only; other states need their own agent
Visit South Dakota Registered Agent.coPartner link. We may earn money if you buy.

Line items on the $99 plan

$99 a year makes South Dakota Registered Agent.co the South Dakota registered agent. The company receives an in-state street address as its registered office, and papers served there are scanned and posted to your account. Renewal carries over at $99.

Forming a South Dakota LLC: the South Dakota Registered Agent.co amounts

Formation through South Dakota Registered Agent.co is $199, with South Dakota's filing fee on a separate line. Year one of registered agent service is included; the agent line after that is $99 a year. An EIN application adds $99, though the IRS itself issues EINs free.

South Dakota then expects the annual report every year, due due during the entity's anniversary month, at $55; South Dakota Registered Agent.co leaves that line to you.

Foreign registration in South Dakota: the South Dakota Registered Agent.co amounts

Registering an outside company in South Dakota through South Dakota Registered Agent.co is $199, plus the state's $750. Year one of registered agent service is included. You provide certificate of Existence.

South Dakota Registered Agent.co against Mainstay Filing

Agent service only: $297 over three years at South Dakota Registered Agent.co, $447 at Mainstay Filing, a gap of $150. Mainstay Filing sells a single agent plan that applies in all fifty states and scans the first three government mailings a year free. Mainstay Filing: $199 a year for formation plus the annual report filing. South Dakota Registered Agent.co: $397 over three years for formation and the agent, report filing excluded. SD Registered Agent.org is the other South Dakota agent on the books; it charges the same $99 a year, and the two rate closely.

South Dakota Registered Agent.co: your questions

What are South Dakota Registered Agent.co's amounts?

$99 a year for registered agent service, and the same on renewal. Formation is $199 plus the South Dakota filing fee.

Does South Dakota Registered Agent.co file my yearly report?

No. The South Dakota annual report is outside its published amounts, so it is your filing.

Does South Dakota Registered Agent.co rate well as a registered agent for a South Dakota LLC?

Yes, if the company is staying in South Dakota and wants a level agent amount. Its average score across our South Dakota pages is 9.0.

What does South Dakota Registered Agent.co include?

The South Dakota registered office address, and online scans of papers served on the company.

Does South Dakota Registered Agent.co register outside companies in South Dakota?

Yes, at $199 plus South Dakota's fee, with a year of agent service included.

More from us

Source lines

  1. South Dakota registered agent statute (ledger date October 2026)
  2. South Dakota Secretary of State, Business Services / Corporations Division (ledger date August 2026)
  3. South Dakota Secretary of State, Business Services / Corporations Division (ledger date August 2026)
  4. South Dakota yearly filing: Annual report: fee and how, official source (ledger date October 2026)
  5. South Dakota report due date (ledger date August 2026)
  6. SDCL 47-34A-203 (ledger date August 2026)
  7. South Dakota formation fee: Filing fee, official source (ledger date October 2026)
  8. South Dakota formation fee: Filing fee, official source (ledger date October 2026)
  9. South Dakota Secretary of State, business services (ledger date October 2026)
  10. Foreign LLC application for Certificate of Authority (ledger date October 2026)
  11. SDCL 47-34A-1003, transacting business (ledger date October 2026)
  12. SDCL 47-34A-1008, effect of not registering (ledger date October 2026)
  13. SDCL 47-34A-1001 to 47-34A-1009, foreign limited liability companies (ledger date November 2026)
  14. South Dakota Registered Agent.co, home, pricing and service pages: amounts read November 12, 2026
  15. Mainstay Filing, South Dakota service pages: amounts read November 12, 2026