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Registered agent guide · South Dakota

South Dakota Registered Agent Requirements (2026): State Fees on File and the 3 Best Agents

South Dakota 2026, a registered agent: the desk ranks South Dakota Registered Agent.co ($99 a year), SD Registered Agent.org ($99 a year) and Mainstay Filing ($149 a year), in that order. A registered agent is required for each South Dakota LLC. State charges every year: $55, rank 30th of 50.

Desk note by LLC Data Desk ·

South Dakota fee sheet

30thon the 50-state sheet, one-year basis1 = smallest bill. Full 50-state sheet
Registered agent required
Yessdlegislature.gov [October 2026]
Annual report
$55 / yrDate set by the state: due during the entity's anniversary month. sdlegislature.gov [October 2026]
Total owed to the state, 1 yr
$55One year of state fees

Who we would hire in South Dakota

Five criteria set the order; three-year fees and filings covered weigh most (method has the rest).

1. South Dakota Registered Agent.co: best for the smallest flat agent fee

Top ranked$99 for year one, unchanged after

South Dakota Registered Agent.co takes first: flat $99 annually, with served papers scanned and sent on.

Lower three-year fees than Mainstay Filing, on the criterion we weight most.

What the fee covers

  • Registered office address in the state
  • Scans of papers served on the company

Pros

  • $99 a year, unchanged at renewal
  • Costs less a year than Mainstay Filing

Cons

  • South Dakota only; other states need their own agent
  • Annual report is not filed for you at all
Visit South Dakota Registered Agent.coPartner link. We may earn money if you buy.

2. SD Registered Agent.org: best for South Dakota specialists

South Dakota only$99 for year one, unchanged after

#2 is SD Registered Agent.org: flat $99 annually, with served papers scanned and sent on.

Same prices as South Dakota Registered Agent.co.

What the fee covers

  • Registered office address in the state
  • Scans of papers served on the company

Pros

  • $99 a year, unchanged at renewal
  • Costs less a year than Mainstay Filing

Cons

  • South Dakota only; other states need their own agent
  • Annual report is not filed for you at all
Visit SD Registered Agent.orgPartner link. We may earn money if you buy.

3. Mainstay Filing: best for businesses that expect to grow

Nationwide$149 for year one, unchanged after

Mainstay Filing takes third: a flat $149 annual fee from a provider active nationwide.

A $150 gap to South Dakota Registered Agent.co over three years keeps it out of first.

What the fee covers

  • In-state street address on file
  • No fee for same-business-day scanning of papers served on the company
  • Government mail: first three pieces each year scanned, no fee
  • Also open to nonprofits, corporations, LPs and LLPs

Pros

  • Fee $149; renewal $149
  • Same fee in all fifty states

Cons

  • $50 extra a year versus South Dakota Registered Agent.co
  • Agent-only plan; reports stay with you
Visit Mainstay FilingPartner link. We may earn money if you buy.

The 3 picks compared

#ServiceAnnual feeRenewal feeService fees, 3 yrs
1South Dakota Registered Agent.co$99$99/yr$297Visit South Dakota Registered Agent.coPartner link. We may earn money if you buy.
2SD Registered Agent.org$99$99/yr$297Visit SD Registered Agent.orgPartner link. We may earn money if you buy.
3Mainstay Filing$149$149/yr$447Visit Mainstay FilingPartner link. We may earn money if you buy.
Company price pages, pulled November 12, 2026. State fees stay put.

Agent cost calculator

Agent fees plus the state's recurring charges (the annual report from year two). Formation fees are left out.
$110 state plus $297 service (South Dakota Registered Agent.co) gives $407 over 3 years.

South Dakota next to nearby ranks

RkStateYearly state fees
27thNorth Dakota$50
27thVirginia$50
30thSouth Dakota$55
31stGeorgia$60
31stWyoming$60
Other states: Registered agent rules by state.

South Dakota law on a registered agent

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.

Who may serve: 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. Authority: SDCL 59-11-6.

South Dakota's repeating fees

Recurring: the annual report, $55 every year, due during the entity's anniversary month. Penalty $50.

How the South Dakota order was set

Deciding criterion for South Dakota: service bill over three years, at 31%.

South Dakota Registered Agent.co's three-year service fees: $297, which is $150 under Mainstay Filing.

Questions

A registered agent required for South Dakota LLCs?

Yes. Every LLC must name a registered agent with an in-state street address.

Who can be the registered agent for South Dakota LLCs?

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.

Yearly cost of registered agent service for South Dakota?

$99 to $149 a year, per the ranking.

Yearly state fees on an LLC?

$55 a year on our yearly measure: the annual report ($55 every year).

Which registered agents are ranked here?

South Dakota Registered Agent.co ($99 a year), SD Registered Agent.org ($99 a year) and Mainstay Filing ($149 a year), beginning with the top pick.

Which registered agent do you pick?

Rank South Dakota Registered Agent.co first (South Dakota-only plan: $99 a year, $99 afterward), then SD Registered Agent.org and Mainstay Filing.

Related files

Basis for this page

  1. Desk file (South Dakota Secretary of State, Business Services /): sdsos.gov, pulled August 2026.
  2. Desk file (South Dakota Secretary of State, Business Services /): sosenterprise.sd.gov, pulled August 2026.
  3. Desk file (South Dakota yearly filing: Annual report: fee and): sdlegislature.gov, pulled October 2026.
  4. Desk file (South Dakota report due date): sdlegislature.gov, pulled August 2026.
  5. Desk file (SDCL 47-34A-203): sdlegislature.gov, pulled August 2026.
  6. Desk file (South Dakota formation fee: Filing fee, official source): sdsos.gov, pulled October 2026.
  7. Desk file (South Dakota formation fee: Filing fee, official source): sdlegislature.gov, pulled October 2026.
  8. Desk file (South Dakota registered agent statute): sdlegislature.gov, pulled October 2026.
  9. Desk file (North Dakota Secretary of State, Business Division): sos.nd.gov, pulled August 2026.
  10. Desk file (North Dakota Secretary of State, Business Division): sos.nd.gov, pulled August 2026.
  11. Desk file (Virginia yearly filing: Recurring filing, official source): law.lis.virginia.gov, pulled October 2026.
  12. Desk file (Virginia yearly filing: Recurring filing, official source): scc.virginia.gov, pulled October 2026.
  13. Desk file (Georgia Secretary of State fee schedule Rev. 8/2025): sos.ga.gov, pulled October 2026.
  14. Desk file (Wyoming Secretary of State, Business Division): wyobiz.wyo.gov, pulled August 2026.
  15. Desk file (Wyoming Secretary of State, Business Division): wyobiz.wyo.gov, pulled August 2026.
  16. Company site pulled November 12, 2026: South Dakota Registered Agent.co pricing page
  17. Company site pulled November 12, 2026: SD Registered Agent.org pricing page
  18. Company site pulled November 12, 2026: Mainstay Filing South Dakota service page