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Founder Primer

LLC paperwork, boiled down for founders.

Primer 1 · South Dakota

LLC Formation in South Dakota (2026): 7 Moves and the 3 Best LLC Services

Our order for starting an LLC in South Dakota, 2026, is Mainstay Filing ($199), SD Registered Agent.org ($199) and South Dakota Registered Agent.co ($199). South Dakota takes $150 at filing and expects the annual report every year. 7 moves cover it.
From the Founder Primer desk

Key facts

State fee to file
$150
sdlegislature.gov, read October 2026
Annual report
$55 a year
Deadline, as the state words it: due during the entity's anniversary month
State cost, years 1 to 3
$260
State charges only
Moves in this primer
7
First to last

After this primer

  • What South Dakota charges to form an LLC and who gets the filing
  • What the registered agent rule asks
  • The upkeep that repeats
  • Our picks and the reasoning

The South Dakota shortlist

Five published criteria set the order; read them on how we score.

First choice $199 first year, $199 renewal, state fee extra

1. Mainstay Filing: best for dropping the annual report paperwork

Mainstay Filing gets the top mark in South Dakota: $199 covers formation, the registered agent and the annual report; year two costs $199.

You pay $200 more than at SD Registered Agent.org across three years and keep less of the paperwork.

Included: the annual report, with the state's $55 charged exactly as South Dakota sets it.

Inside the price
  • We prepare and file the formation
  • Registered agent all year
  • Annual report filed on time
  • EIN application included
  • State fee passed through at cost
In its favor
  • Renews at $199
  • EIN application included
  • $199/yr for the whole bundle
Against it
  • Renewal is $100 higher than SD Registered Agent.org
Visit Mainstay Filing Partner link. We may earn money if you buy.
South Dakota specialist Formation $199; renewal $99 a year

2. SD Registered Agent.org: best for South Dakota LLCs on a tight budget

SD Registered Agent.org lands second: $199 on top of the state fee, agent free in year one, then $99 a year.

The price leaves out the annual report, so you file it every year.

Inside the price
  • The filing is made for you
  • Agent service for year one
In its favor
  • No agent fee in year one
  • $99 yearly from year two
  • $199 to form
Against it
  • No annual report service
  • A $99 add-on for the EIN
Visit SD Registered Agent.org Partner link. We may earn money if you buy.
South Dakota specialist Formation $199; renewal $99 a year

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

South Dakota Registered Agent.co lands third: $199 on top of the state fee, agent free in year one, then $99 a year.

The price leaves out the annual report, so you file it every year.

It lists the same prices as SD Registered Agent.org.

Inside the price
  • The filing is made for you
  • Agent service for year one
In its favor
  • $199 to form
  • No agent fee in year one
  • $99 yearly from year two
Against it
  • No annual report service
  • A $99 add-on for the EIN
Visit South Dakota Registered Agent.co Partner link. We may earn money if you buy.

3 services side by side

# Service First year From year two Three-year total
1 Mainstay Filing $199 $199/yr $597 Visit Mainstay Filing Partner link. We may earn money if you buy.
2 SD Registered Agent.org $199 $99/yr $397 Visit SD Registered Agent.org Partner link. We may earn money if you buy.
3 South Dakota Registered Agent.co $199 $99/yr $397 Visit South Dakota Registered Agent.co Partner link. We may earn money if you buy.

Each company's listed price on November 13, 2026. Each row still needs South Dakota's $150 fee.

The primer, move by move

  1. Move 1

    Pick the name and test it

    Search the South Dakota Secretary of State first. If the name is already on the South Dakota register, you will need another.

    Look up the matching domain at the same time.

  2. Move 2

    Fill the registered agent seat

    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.

    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.

    Every pick above takes the registered agent role.

    Where this comes from: sdlegislature.gov, read October 2026

  3. Move 3

    Who files it?

    Without a service you pay the state $150, nothing more. Any of our picks adds $199 and handles the paperwork.

  4. Move 4

    Submit the Articles of Organization

    the South Dakota Secretary of State forms the LLC when it accepts the Articles of Organization with $150. Official turnaround: Paper 1 to 3 business days; online processed immediately.

    Where this comes from: sdlegislature.gov, read October 2026

  5. Move 5

    Request an Employer Identification Number

    Once South Dakota approves the LLC, ask the IRS for an EIN. Banks and payroll providers need one. The Mainstay Filing package already includes this move.

  6. Move 6

    Write an operating agreement

    The operating agreement says who owns the South Dakota LLC and how decisions get made. Keep it with your records; the state never sees it.

  7. Move 7

    Plan for year two

    Every year the LLC files the annual report and pays $55; deadline due during the entity's anniversary month. File late and add $50.

    Where this comes from: sdlegislature.gov, read October 2026

What you will pay

Line Recipient Cost
The formation move The state $150
Annual report The state $55 every year
If the report is late The state $50
Paid help Your service $199 in year one
State total, three years The state $260

State amounts are South Dakota's official fees (sources below); service prices come from each company's site. Three years of state cost is the filing, the reports in years two and three and any minimum tax.

How the marks came out

To-dos the price takes off you is 38% of the mark, and it is where moved ahead in South Dakota.

Handling the annual report tipped the mark toward the bundle.

South Dakota quick answers

What does it cost to file an LLC in South Dakota?

You pay $150 to file. A service adds $199 the first year.

Which form creates the LLC?

The destination for the Articles of Organization is the South Dakota Secretary of State.

Is a registered agent required?

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

How long does South Dakota take to process the filing?

Count on Paper 1 to 3 business days; online processed immediately.

What does South Dakota require each year?

File the annual report every year, $55; deadline due during the entity's anniversary month.

Can I form the LLC without a service?

Allowed. File yourself for $150 and arrange a registered agent.

Which LLC service should a first-time founder use?

Pick Mainstay Filing: $199 a year buys the filing, the registered agent and the annual report in one go, and renewal is the same $199. Behind it: SD Registered Agent.org and South Dakota Registered Agent.co.

Keep reading

Sources, so you can check us

  1. Verify South Dakota Secretary of State, Business Services / at sdsos.gov. Our copy of it is from August 2026.
  2. Verify South Dakota Secretary of State, Business Services / at sosenterprise.sd.gov. Our copy of it is from August 2026.
  3. Verify South Dakota yearly filing: Annual report: fee and at sdlegislature.gov. Our copy of it is from October 2026.
  4. Verify South Dakota report due date at sdlegislature.gov. Our copy of it is from August 2026.
  5. Verify SDCL 47-34A-203 at sdlegislature.gov. Our copy of it is from August 2026.
  6. Verify South Dakota formation fee: Filing fee, official source at sdsos.gov. Our copy of it is from October 2026.
  7. Verify South Dakota formation fee: Filing fee, official source at sdlegislature.gov. Our copy of it is from October 2026.
  8. Verify South Dakota registered agent statute at sdlegislature.gov. Our copy of it is from October 2026.
  9. Verify Processing, official source at sdsos.gov. Our copy of it is from October 2026.
  10. Mainstay Filing: South Dakota service page, read on November 13, 2026
  11. SD Registered Agent.org: pricing page, read on November 13, 2026
  12. South Dakota Registered Agent.co: pricing page, read on November 13, 2026