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Formation Facts

What the state wants, and what it costs.

Registered agent guide · South Dakota

South Dakota Registered Agent Requirements and Fees (2026): the Rules and the 3 Best Agents

For anyone naming a registered agent in South Dakota this year, 2026, we would go with Mainstay Filing ($149 a year), SD Registered Agent.org ($99 a year) and South Dakota Registered Agent.co ($99 a year), in that order. Under South Dakota law, a registered agent is a must for your LLC. The yearly state fee total is $55, ranked 30th of 50.
Briefing by the Formation Facts team

South Dakota: the quick briefing

30th

of 50 for one year of state fees

States are ranked from lowest to highest. Open the full comparison

  • Registered agent required

    Yes

    sdlegislature.gov, as confirmed in October 2026

  • Annual report

    $55 / yr

    Deadline, as the state states it: due during the entity's anniversary month. sdlegislature.gov, as confirmed in October 2026

  • What the state collects in 1 year

    $55

    The fees the state collects after formation

Who we recommend in South Dakota

Every criterion and weight is on the method page.

First pick

1. Mainstay Filing: best for companies that work in several states

$149 a year, then $149 a year

Mainstay Filing ranks first for you since a flat $149 a year from a provider that works across the country.

Plan on spending $150 more than at SD Registered Agent.org over three years, in exchange for fewer filings left for you to do.

What your money gets you

  • A street address for your registered office
  • Scans anything served on the company the same business day and does not charge for it
  • Scans your first three government letters each year at no cost
  • Also works for nonprofits, corporations, LPs and LLPs

What works

  • The same price in all fifty states
  • $149 annually

What to weigh

  • SD Registered Agent.org charges $50 less every year
  • It only covers the agent, and you send in the reports
Visit Mainstay FilingPartner link. We may earn money if you buy.

Home-state option

2. SD Registered Agent.org: best for owners who run their business from South Dakota

$99 a year, then $99 a year

SD Registered Agent.org is second for you since $99 a year with no jump at renewal, designed for a company that works in a single state.

What your money gets you

  • A physical address in South Dakota
  • Online copies of whatever is served

What works

  • A lower yearly price than Mainstay Filing
  • $99 annually

What to weigh

  • A different state needs a different agent
  • Writing up the annual report falls to you
Visit SD Registered Agent.orgPartner link. We may earn money if you buy.

Home-state option

3. South Dakota Registered Agent.co: best for an agent near home

$99 a year, then $99 a year

South Dakota Registered Agent.co is third for you since $99 a year with no jump at renewal, designed for a company that works in a single state.

On price it is exactly level with SD Registered Agent.org.

What your money gets you

  • A physical address in South Dakota
  • Online copies of whatever is served

What works

  • $99 annually
  • A lower yearly price than Mainstay Filing

What to weigh

  • A different state needs a different agent
  • Writing up the annual report falls to you
Visit South Dakota Registered Agent.coPartner link. We may earn money if you buy.

The ranking in numbers

RankWhoYou pay per yearRenewal priceTheir fees across 3 years
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.
Prices as shown on November 13, 2026. Whichever agent you pick, South Dakota's fees do not change.

Agent and state fees by year

This adds agent fees to the state's recurring charges (the annual report from year 2). Formation fees are not included.
Choosing Mainstay Filing means paying $557 over 3 years, made up of $110 for the state and $447 for the service.

How South Dakota compares with the states near it in the ranking

RankStateYearly state fees
27thNorth Dakota$50
27thVirginia$50
30thSouth Dakota$55
31stGeorgia$60
31stWyoming$60
You will find all fifty rows at Registered agent rules by state.

South Dakota registered agent requirements from the Secretary of State (official)

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 you can use: 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. See SDCL 59-11-6.

Keeping your South Dakota LLC active in 2026

What keeps coming back is the annual report, at $55 every year, due during the entity's anniversary month. The penalty is $50.

Why Mainstay Filing comes first

In South Dakota, Mainstay Filing beat SD Registered Agent.org on upkeep the price covers (26%).

SD Registered Agent.org costs less, and being able to work in many states earned the higher score.

Common questions

Do I have to name a registered agent for my South Dakota LLC?

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

Who is allowed to be a registered agent for my South Dakota LLC?

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 will registered agent service cost me each year in South Dakota?

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

Which state fees will I pay every year?

You will pay $55 a year on our yearly measure, which is the annual report ($55 every year).

Which registered agents does this page rank?

Mainstay Filing ($149 a year), SD Registered Agent.org ($99 a year) and South Dakota Registered Agent.co ($99 a year), starting at the top of our list.

Which registered agent should I choose?

Our ranking is Mainstay Filing, SD Registered Agent.org and South Dakota Registered Agent.co.

Related briefings

Where this briefing comes from

  1. Everything in this briefing about South Dakota Secretary of State, Business Services / rests on sdsos.gov, which we confirmed in August 2026, so you can compare our wording with the source.
  2. Everything in this briefing about South Dakota Secretary of State, Business Services / rests on sosenterprise.sd.gov, which we confirmed in August 2026, so you can compare our wording with the source.
  3. Everything in this briefing about South Dakota yearly filing: Annual report: fee and rests on sdlegislature.gov, which we confirmed in October 2026, so you can compare our wording with the source.
  4. Everything in this briefing about South Dakota report due date rests on sdlegislature.gov, which we confirmed in August 2026, so you can compare our wording with the source.
  5. Everything in this briefing about SDCL 47-34A-203 rests on sdlegislature.gov, which we confirmed in August 2026, so you can compare our wording with the source.
  6. Everything in this briefing about South Dakota formation fee: Filing fee, official source rests on sdsos.gov, which we confirmed in October 2026, so you can compare our wording with the source.
  7. Everything in this briefing about South Dakota formation fee: Filing fee, official source rests on sdlegislature.gov, which we confirmed in October 2026, so you can compare our wording with the source.
  8. Everything in this briefing about South Dakota registered agent statute rests on sdlegislature.gov, which we confirmed in October 2026, so you can compare our wording with the source.
  9. Everything in this briefing about North Dakota Secretary of State, Business Division rests on sos.nd.gov, which we confirmed in August 2026, so you can compare our wording with the source.
  10. Everything in this briefing about North Dakota Secretary of State, Business Division rests on sos.nd.gov, which we confirmed in August 2026, so you can compare our wording with the source.
  11. Everything in this briefing about Virginia yearly filing: Recurring filing, official source rests on law.lis.virginia.gov, which we confirmed in October 2026, so you can compare our wording with the source.
  12. Everything in this briefing about Virginia yearly filing: Recurring filing, official source rests on scc.virginia.gov, which we confirmed in October 2026, so you can compare our wording with the source.
  13. Everything in this briefing about Georgia Secretary of State fee schedule Rev. 8/2025 rests on sos.ga.gov, which we confirmed in October 2026, so you can compare our wording with the source.
  14. Everything in this briefing about Wyoming Secretary of State, Business Division rests on wyobiz.wyo.gov, which we confirmed in August 2026, so you can compare our wording with the source.
  15. Everything in this briefing about Wyoming Secretary of State, Business Division rests on wyobiz.wyo.gov, which we confirmed in August 2026, so you can compare our wording with the source.
  16. South Dakota service page for Mainstay Filing was confirmed on the company site on November 13, 2026
  17. Pricing page for SD Registered Agent.org was confirmed on the company site on November 13, 2026
  18. Pricing page for South Dakota Registered Agent.co was confirmed on the company site on November 13, 2026