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What forming an LLC costs by state / South Dakota

3 Best LLC Services in South Dakota (2026): What You Pay

For 2026, we would price out Mainstay Filing ($199), SD Registered Agent.org ($199) and South Dakota Registered Agent.co ($199), in that order, before any other South Dakota LLC formation services. You will pay between $397 to $597 to a service across three years, and $150 to South Dakota whichever one you choose.
Written by the Price Your LLC editorial team

↓ Ranked for you by: What you spend over three years counts 38%, and how much work the price takes off you counts 31%. Renewal change, break-even and price visibility make up the rest. How we rank

Budget snapshot

Government charge to file $150 sdlegislature.gov (we looked on October 2026, so you can too)
Year-one range $199 What the service charges
Your three-year spend $397 to $597 Renewals included
What the state collects in 3 years $260 Not part of the ranking
Break-even Not within ten years Stable for a decade

Your South Dakota options

Ranked by how we rank. The $150 state fee is not folded into any option.

1
Best value for you

1. Mainstay Filing: best for a yearly price you can plan around

$199 a year, and you pay the state $150
You pay in year 1 $199
You pay after year 1 $199/yr
You pay over 3 years $597

Mainstay Filing is the best value for you in South Dakota: one $199 price takes care of formation, registered agent service and every annual report.

Pay $200 more than SD Registered Agent.org across three years and the repeating filings stop being your problem.

The annual report is covered, so your only extra is the state's $55.

Your price covers

  • Formation handled for you
  • Registered agent for the whole year
  • Annual report, filed on time
  • EIN application prepared for you
  • No markup on government fees

What you get

  • One yearly price of $199
  • Renewal stays at $199
  • The EIN application is taken care of

What to watch

  • $100 more a year than SD Registered Agent.org after year one
2
South Dakota only

2. SD Registered Agent.org: best for the smallest bill over three years

$199 to form, $99 yearly after
You pay in year 1 $199
You pay after year 1 $99/yr
You pay over 3 years $397

Spot 2 goes to SD Registered Agent.org: $199 to start, first agent year included, then $99 a year.

The annual report is not covered by this price.

Your price covers

  • Formation delivered to the state office
  • Agent service for your first year

What you get

  • Agent included to start
  • Starts at $199
  • $99 a year after that

What to watch

  • You keep the annual report as your job
  • EIN application not included ($99)
3
South Dakota only

3. South Dakota Registered Agent.co: best for owners who prepare their own reports

$199 to form, $99 yearly after
You pay in year 1 $199
You pay after year 1 $99/yr
You pay over 3 years $397

Spot 3 goes to South Dakota Registered Agent.co: $199 to start, first agent year included, then $99 a year.

The annual report is not covered by this price.

Year-one and renewal prices both equal SD Registered Agent.org's.

Your price covers

  • Formation delivered to the state office
  • Agent service for your first year

What you get

  • $99 a year after that
  • Starts at $199
  • Agent included to start

What to watch

  • You keep the annual report as your job
  • EIN application not included ($99)

Costs over time

Pick Service You pay in year 1 You pay by year 2 You pay by year 3 You pay by year 5
1 Mainstay Filing $199 $398 $597 $995 Price out Mainstay Filing Partner link. We may earn money if you buy.
2 SD Registered Agent.org $199 $298 $397 $595 Price out SD Registered Agent.org Partner link. We may earn money if you buy.
3 South Dakota Registered Agent.co $199 $298 $397 $595 Price out South Dakota Registered Agent.co Partner link. We may earn money if you buy.

Prices as published November 13, 2026; you pay year one first, then each renewal is added. None of the bills cross in ten years.

Your budget calculator

Your totals for 1 to 5 years, EIN application optional. State fees are left out because every service owes the same ones.

Your spend for 3 years: Mainstay Filing $597, SD Registered Agent.org $397, South Dakota Registered Agent.co $397. Least you would pay: SD Registered Agent.org.

State fees with sources

What you pay for Amount Source
Cost to form $150 sdlegislature.gov (we looked on October 2026, so you can too)
Annual report $55 every year sdlegislature.gov (we looked on October 2026, so you can too)
Late report $50 sdlegislature.gov (we looked on October 2026, so you can too)
Three-year state total $260 Our sum

Each line links to the state's own page. Together they give you the three-year state total: filing, reports in years two and three, and a minimum tax if there is one.

Why number one is number one

For South Dakota, the deciding factor was upkeep the price covers (31% of the ranking), where Mainstay Filing came out ahead.

SD Registered Agent.org costs you less over three years, but the annual report would still be yours to file.

Need the EIN application? Then the bills cross in year 2, as Mainstay Filing moves past SD Registered Agent.org.

What South Dakota charges you to form an LLC and what it requires

The South Dakota Secretary of State takes $150 plus the Articles of Organization. Every LLC must name a registered agent with an in-state street address.

The state's wording: sdlegislature.gov (we looked on October 2026, so you can too)

Doing it alone

Without a service you pay $260 in state fees across three years. Hiring one adds $397 to $597 to your bill.

About these prices

How much will an LLC formation service cost me in South Dakota?

$199 in year one, plus the state's $150 filing fee.

What will these services cost me over three years?

Anywhere from $397 to $597 for three years of service.

How much will South Dakota charge me to file an LLC?

Plan on $150 to file with the Articles of Organization.

What will South Dakota charge me each year after formation?

Annual report: $55 a year, and the state says it is due due during the entity's anniversary month.

Will the EIN application be part of the price?

Mainstay Filing handles it for you, SD Registered Agent.org asks $99 for it and South Dakota Registered Agent.co asks $99 for it.

When does one service end up costing more than another?

Over ten years the totals never swap places.

Which LLC formation service is the best value for me in South Dakota?

Mainstay Filing, which wins on upkeep the price covers. SD Registered Agent.org and South Dakota Registered Agent.co follow.

Where to go next

What forming an LLC costs by state for all 50 states Best LLC services for anyone How we rank your options

Where we looked

  1. Want to double-check South Dakota Secretary of State? Try sdsos.gov, last read August 2026.
  2. Want to double-check South Dakota Secretary of State? Try sosenterprise.sd.gov, last read August 2026.
  3. Want to double-check South Dakota yearly filing: Annual? Try sdlegislature.gov, last read October 2026.
  4. Want to double-check South Dakota report due date? Try sdlegislature.gov, last read August 2026.
  5. Want to double-check SDCL 47-34A-203? Try sdlegislature.gov, last read August 2026.
  6. Want to double-check South Dakota formation fee: Filing? Try sdsos.gov, last read October 2026.
  7. Want to double-check South Dakota formation fee: Filing? Try sdlegislature.gov, last read October 2026.
  8. Want to double-check South Dakota registered agent statute? Try sdlegislature.gov, last read October 2026.
  9. Price page checked November 13, 2026: Mainstay Filing South Dakota service page
  10. Price page checked November 13, 2026: SD Registered Agent.org pricing page
  11. Price page checked November 13, 2026: South Dakota Registered Agent.co pricing page