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Registered agent price tables - South Dakota

3 Best Registered Agents in South Dakota (2026): Price Table

Reading down the 2026 South Dakota table, the order is Mainstay Filing ($149/yr), South Dakota Registered Agent.co ($99/yr) and SD Registered Agent.org ($99/yr). Expect $99 to $149 up front and $297 to $447 after three years of service.

Compiled by the LLC Price Tables editorial team ·

Table order: Entries are placed by five columns; cost carries 40% and coverage 30%

Table summary

  • Required by law?Yessdlegislature.gov [read October 2026, table note]
  • What year one costs$99 to $149One year of service
  • Cells at year three$297 to $447Opening year plus two more
  • Annual report$55 per yearsdlegislature.gov [read October 2026, table note]
  • First swapEntries keep their placesNo entry passes another

The South Dakota entries

Columns give year one, the price after that and the three-year total. Your choice of agent does not move state fees.

  1. 1. Mainstay Filing: best for a single agent covering fifty states

    Best value
    • Year-1 cell$149
    • Renewal cell$149/yr
    • Three-year cell$447

    $149 to begin and $149 at each renewal

    For South Dakota, Mainstay Filing is the best value because the same $149 a year across the fifty states.

    The $150 difference from South Dakota Registered Agent.co at year three buys coverage, and coverage settles the order.

    Price buys

    • A physical address on file
    • Up to three government mailings a year, scanned at no extra charge
    • Covers LLCs, corporations, LPs, LLPs and nonprofits

    In its favor

    • The same price in all fifty states
    • $149 a year, no change at renewal

    Against it

    • $50 a year above South Dakota Registered Agent.co
    • Does not file the yearly report
    See Mainstay FilingPartner link. We may earn money if you buy.

  2. 2. South Dakota Registered Agent.co: best for LLCs based in one state only

    In-state provider
    • Year-1 cell$99
    • Renewal cell$99/yr
    • Three-year cell$297

    $99 to begin and $99 at each renewal

    Below that, South Dakota Registered Agent.co: a single state at $99 a year, $99 after renewal.

    Price buys

    • An address in the state on record
    • Legal documents posted to your account

    In its favor

    • A lower yearly price than Mainstay Filing
    • $99 annually, no increase

    Against it

    • One-state service
    • Does not cover the annual report
    See South Dakota Registered Agent.coPartner link. We may earn money if you buy.

  3. 3. SD Registered Agent.org: best for another address in the state

    In-state provider
    • Year-1 cell$99
    • Renewal cell$99/yr
    • Three-year cell$297

    $99 to begin and $99 at each renewal

    Below that, SD Registered Agent.org: a single state at $99 a year, $99 after renewal.

    Cell for cell, it ties South Dakota Registered Agent.co.

    Price buys

    • An address in the state on record
    • Legal documents posted to your account

    In its favor

    • A lower yearly price than Mainstay Filing
    • $99 annually, no increase

    Against it

    • One-state service
    • Does not cover the annual report
    See SD Registered Agent.orgPartner link. We may earn money if you buy.

Year-by-year totals

No.EntryYear 1 cellYear 2 cellYear 3 cellYear 5 cell
1Mainstay Filing$149$298$447$745See Mainstay FilingPartner link. We may earn money if you buy.
2South Dakota Registered Agent.co$99$198$297$495See South Dakota Registered Agent.coPartner link. We may earn money if you buy.
3SD Registered Agent.org$99$198$297$495See SD Registered Agent.orgPartner link. We may earn money if you buy.
Year one plus renewals, using prices read November 13, 2026. The order of totals stays fixed for ten years.

Break-even check

Once you set the years, the calculator adds year one and the renewals for each entry.
Over 3 years: Mainstay Filing $447, South Dakota Registered Agent.co $297, SD Registered Agent.org $297. Lowest of the totals: South Dakota Registered Agent.co.

South Dakota fee list

ChargeCellSource
Formation charge$150sdlegislature.gov [read October 2026, table note]
Annual report$55 every yearsdlegislature.gov [read October 2026, table note]
Late fee$50sdlegislature.gov [read October 2026, table note]
State fees over three years$260Our sum
Each line cites the state's own page. Together they give a three-year state figure: filing, reports for years two and three, and a minimum tax where one applies.

What settled the order

Filing work per row put Mainstay Filing first. That column is 30% of the sort, and three-year row total, renewal gap, row crossover and cell clarity make up the remainder.

Coverage put it ahead of South Dakota Registered Agent.co.

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

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

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. Governing section: SDCL 59-11-6.

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.

As printed: sdlegislature.gov [read October 2026, table note]

State fees only

With no service, the agent cell reads zero, provided you qualify, and the state charges the same. Services run $99 to $149 a year.

About these figures

What does a South Dakota registered agent cost per year?

These entries charge $99 to $149 per year.

What do three years of agent service cost?

$297 to $447 across the entries, not counting state fees.

Does the law make a South Dakota LLC keep a registered agent?

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

Is the owner permitted to be the registered agent?

You can, provided you meet both the address and eligibility rules.

What does the state charge the LLC every year?

Every year the state bills $55 for the annual report, due due during the entity's anniversary month.

When does one entry pass another in total cost?

The entries do not swap places in the first ten years.

Which registered agent is the best value in South Dakota?

Entry one is Mainstay Filing, then South Dakota Registered Agent.co, then SD Registered Agent.org.

See also

Where this came from

  1. Figure for South Dakota Secretary of State confirmed at sdsos.gov during August 2026.
  2. Figure for South Dakota Secretary of State confirmed at sosenterprise.sd.gov during August 2026.
  3. Figure for South Dakota yearly filing: Annual confirmed at sdlegislature.gov during October 2026.
  4. Figure for South Dakota report due date confirmed at sdlegislature.gov during August 2026.
  5. Figure for SDCL 47-34A-203 confirmed at sdlegislature.gov during August 2026.
  6. Figure for South Dakota formation fee: Filing confirmed at sdsos.gov during October 2026.
  7. Figure for South Dakota formation fee: Filing confirmed at sdlegislature.gov during October 2026.
  8. Figure for South Dakota registered agent statute confirmed at sdlegislature.gov during October 2026.
  9. Mainstay Filing South Dakota service page page as of November 13, 2026
  10. South Dakota Registered Agent.co pricing page page as of November 13, 2026
  11. SD Registered Agent.org pricing page page as of November 13, 2026