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Lesson 2 · South Dakota

How to Get a Registered Agent in South Dakota (2026): 6 Steps and the 3 Best Agents

The short answer for a registered agent in South Dakota this year (2026): Mainstay Filing ($149 a year), SD Registered Agent.org ($99 a year) and South Dakota Registered Agent.co ($99 a year), in that order. After the picks, 6 steps explain the registered agent rule in plain words.

The Founder Classroom teaching team ·

The short version

Required by law
YesOfficial: sdlegislature.gov, October 2026
Our picks cost
$99 to $149 a yearPublished prices
Annual report
$55 a yearOfficial: sdlegislature.gov, October 2026
Steps
6One at a time

Lesson goals

  • Why South Dakota needs an agent on file
  • Who may act as agent
  • Getting the agent on file
  • Who we would hire as agent

Teacher's pick

The South Dakota services we recommend

How we graded: five criteria, with three-year cost and steps handled counting most.
Best overall

1. Mainstay Filing: best for founders planning to expand

$149 a year, renews at $149

First on our list, Mainstay Filing: an agent at $149 a year that can follow the company into new states.

The three-year premium over SD Registered Agent.org is $150, which the 35% steps-handled weight covers.

What you get

  • In-state office address
  • Service of process scanned the same business day at no charge
  • Three government mailings a year scanned free
  • Covers LLCs, corporations, LPs, LLPs and nonprofits

What we like

  • Works in every state
  • $149 yearly, no increase

Watch out for

  • $50 more per year than the local pick
  • Agent-only plan does not file reports
Visit Mainstay FilingPartner link. We may earn money if you buy.
South Dakota focus

2. SD Registered Agent.org: best for founders on a budget

$99 a year, renews at $99

SD Registered Agent.org is a solid second choice: a one-state plan at $99 a year that renews at $99.

What you get

  • Registered office address
  • Scans of served papers

What we like

  • $99 a year, same at renewal
  • Under Mainstay Filing on price

Watch out for

  • Another state means another agent
  • No annual report filing
Visit SD Registered Agent.orgPartner link. We may earn money if you buy.
South Dakota focus

3. South Dakota Registered Agent.co: best for a second local choice

$99 a year, renews at $99

South Dakota Registered Agent.co is a solid third choice: a one-state plan at $99 a year that renews at $99.

Same published prices as SD Registered Agent.org.

What you get

  • Registered office address
  • Scans of served papers

What we like

  • $99 a year, same at renewal
  • Under Mainstay Filing on price

Watch out for

  • Another state means another agent
  • No annual report filing
Visit South Dakota Registered Agent.coPartner link. We may earn money if you buy.

Our South Dakota picks compared

#ServiceAnnual priceRenewal priceThree-year total
1Mainstay Filing$149$149/yr$447Visit Mainstay FilingPartner 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.
3South Dakota Registered Agent.co$99$99/yr$297Visit South Dakota Registered Agent.coPartner link. We may earn money if you buy.
Each company's listed price on November 12, 2026. South Dakota bills the same either way.

How to set up your South Dakota agent

  1. Step 1: Understand the requirement

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

    Official source: Official: sdlegislature.gov, October 2026

  2. Step 2: Find out who can do the job

    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. Law: SDCL 59-11-6.

  3. Step 3: Check the office address rule

    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.

    TipA service address keeps your home address private.

  4. Step 4: Do it yourself or hire an agent

    If you qualify under the rules above, you can be your own agent. Otherwise our picks charge $99 to $149 a year.

  5. Step 5: Put the agent on record

    Name the agent in the Articles of Organization; for an existing LLC, the change is filed with the South Dakota Secretary of State.

    Official source: Official: sdlegislature.gov, October 2026

  6. Step 6: Look after it each year

    $55 every year for the annual report, due due during the entity's anniversary month. Notices about it reach you through the registered agent.

    Official source: Official: sdlegislature.gov, October 2026

What the agent costs in South Dakota

ItemPaid toAmount
The agentThe service$99 to $149 a year
Renewing the agentThe service$99 to $149 a year
Annual reportState$55 every year
State amounts come from South Dakota's official schedules (see References). The three-year state line adds the filing, the reports due in years two and three and any yearly minimum tax.

Why Mainstay Filing comes first

The grade turned on lesson steps handled (35%), where Mainstay Filing came out ahead of SD Registered Agent.org.

One agent for any state beat the one-state option.

Questions students ask

Do I need a registered agent in South Dakota?

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

Can I be my own registered agent?

Yes. Steps 2 and 3 set out who qualifies and the address you need.

Can I change my registered agent later?

Yes. An existing LLC files the change with the South Dakota Secretary of State, as step 5 explains.

What does a registered agent cost in South Dakota?

Expect $99 to $149 a year.

What does the LLC pay the state each year?

The annual report, $55 every year.

Which registered agent would you choose?

Mainstay Filing, SD Registered Agent.org and South Dakota Registered Agent.co, ranked in that order.

More lessons

Where these facts come from

  1. South Dakota Secretary of State, Business Services /, published at sdsos.gov, as of August 2026
  2. South Dakota Secretary of State, Business Services /, published at sosenterprise.sd.gov, as of August 2026
  3. South Dakota yearly filing: Annual report: fee and, published at sdlegislature.gov, as of October 2026
  4. South Dakota report due date, published at sdlegislature.gov, as of August 2026
  5. SDCL 47-34A-203, published at sdlegislature.gov, as of August 2026
  6. South Dakota formation fee: Filing fee, official source, published at sdsos.gov, as of October 2026
  7. South Dakota formation fee: Filing fee, official source, published at sdlegislature.gov, as of October 2026
  8. South Dakota registered agent statute, published at sdlegislature.gov, as of October 2026
  9. Mainstay Filing, South Dakota service page (read November 12, 2026)
  10. SD Registered Agent.org, pricing page (read November 12, 2026)
  11. South Dakota Registered Agent.co, pricing page (read November 12, 2026)