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The Founders Review

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

Review · South Dakota

South Dakota Registered Agent.co Review (2026)

For $99 a year (the same $99 at renewal), South Dakota Registered Agent.co acts as your South Dakota registered agent, gives the company an in-state street address for its registered office and scans served legal papers to you online. LLC formation costs $199 plus the state fee, with year one of agent service included. For foreign registration it charges $199 plus the state fee. It suits a company based only in South Dakota that is happy to file its own annual report.

Written by The Founders Review editorial team

Our take

South Dakota Registered Agent.co

South Dakota Registered Agent.co: best for a South Dakota-only company

$99/yr, renews at $99
Our mark8.9out of 10

Worth it for a one-state company that files its own reports.

What you get

  • A registered office address in the state
  • Legal documents served on the company scanned and sent to you online

Why pick it

  • $99 a year, the same at renewal
  • Costs less than Mainstay Filing each year
  • LLC formation and foreign registration from the same company
  • Agent year one included when it forms your LLC

Less good

  • Does not file the annual report for you
  • Charges $99 for the EIN application
  • Focused on South Dakota; other states need their own agent
Visit South Dakota Registered Agent.coPartner link. We may earn money if you buy.

South Dakota Registered Agent.co pricing and what's included

The yearly plan gives your company an in-state street address for its registered office, and South Dakota Registered Agent.co scans legal documents served on the company and sends them to you online. The price is $99 a year. Renewal is the same $99.

Using South Dakota Registered Agent.co to form your LLC

South Dakota Registered Agent.co prepares and files the Articles of Organization for $199 plus South Dakota's $150 filing fee. The first year of registered agent service is included, then the agent is $99 a year. An EIN application is a $99 add-on; the IRS issues EINs for free.

After formation, South Dakota expects the annual report every year, due due during the entity's anniversary month, with a $55 state fee. Filing it is not part of South Dakota Registered Agent.co's published prices.

South Dakota Registered Agent.co foreign registration

For a company formed elsewhere, South Dakota Registered Agent.co files the Application for Certificate of Authority, Foreign Limited Liability Company with the South Dakota Secretary of State for $199 plus the state's $750 fee. A year of registered agent service comes with it. You supply certificate of Existence.

Compared with the other picks

South Dakota Registered Agent.co saves $150 over three years against Mainstay Filing ($297 vs $447). Mainstay's price is the same in every state and scans the first three government mailings a year free. Mainstay Filing's $199 yearly price adds the annual report; South Dakota Registered Agent.co comes to $397 over three years. SD Registered Agent.org, the other South Dakota agent on our list, publishes the same yearly price of $99, and the two sit close together on our South Dakota pages.

What people ask about South Dakota Registered Agent.co

How much does South Dakota Registered Agent.co cost?

$99 a year for its registered agent service, and the same at renewal. LLC formation is $199 plus the South Dakota filing fee.

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

No. Filing the South Dakota annual report is not part of its published prices.

Is South Dakota Registered Agent.co a good registered agent for a South Dakota LLC?

For a company that operates only in South Dakota and wants a low fixed price, yes. Its average score across our South Dakota pages is 8.9.

What does South Dakota Registered Agent.co include?

A South Dakota registered office address plus scans of served documents.

Can South Dakota Registered Agent.co register my out-of-state company in South Dakota?

Yes. It files the registration for $199 plus South Dakota's fee, with a year of agent service included.

More from us

Sources we used

  1. South Dakota registered agent statute (checked October 2026): sdlegislature.gov/Statutes/59-11-6
  2. South Dakota Secretary of State, Business Services / Corporations Division (checked August 2026): sdsos.gov/docs/business/llc-domestic-annualreport.pdf
  3. South Dakota Secretary of State, Business Services / Corporations Division (checked August 2026): sosenterprise.sd.gov/BusinessServices/Business/AnnualReportInstr.aspx
  4. South Dakota yearly filing: Annual report: fee and how, official source (checked October 2026): sdlegislature.gov/api/Statutes/59-11-24.html
  5. South Dakota report due date (checked August 2026): sdlegislature.gov/Statutes/47-34A-211
  6. SDCL 47-34A-203 (checked August 2026): sdlegislature.gov/Statutes/47-34A-212
  7. South Dakota formation fee: Filing fee, official source (checked October 2026): sdsos.gov/general-information/filing-fees.aspx
  8. South Dakota formation fee: Filing fee, official source (checked October 2026): sdlegislature.gov/api/Statutes/47-34A-212.html
  9. South Dakota Secretary of State, business services (checked October 2026): sdsos.gov/business-services/corporations/contact.aspx
  10. Foreign LLC application for Certificate of Authority (checked October 2026): sdsos.gov/docs/business/foreignllccertificateofauthority20180215.pdf
  11. SDCL 47-34A-1003, transacting business (checked October 2026): sdlegislature.gov/api/Statutes/47-34A-1003.html
  12. SDCL 47-34A-1008, effect of not registering (checked October 2026): sdlegislature.gov/api/Statutes/47-34A-1008.html
  13. SDCL 47-34A-1001 to 47-34A-1009, foreign limited liability companies (checked November 2026): sdlegislature.gov/Statutes/47-34A-1002
  14. South Dakota Registered Agent.co: home, pricing and service pages, read November 12, 2026
  15. Mainstay Filing: South Dakota service pages, read November 12, 2026