LLC price index · South Dakota
3 Best LLC Services in South Dakota (2026): Price Index
Index basis: Five columns make the index; two of them hold 70% of the weight
Figures at a glance
The indexed ledger
1. Mainstay Filing: best for one price for filing and upkeep
Best value on the ledgerLine one is Mainstay Filing: $199 a year covers the filing, the registered agent and the annual report, and the line reads $199 again in year two.
Spend $200 more than SD Registered Agent.org over three years and the recurring paperwork leaves your desk.
Filing each annual report is part of the service; the state's $55 is billed at cost.
Line includes
- The LLC filing
- Registered agent for the full year
- Annual report, prepared and filed
- The EIN application
- State charges passed through untouched
Credits
- Renews at the same $199
- No separate EIN fee
- A flat $199 every year
Debits
- SD Registered Agent.org's renewal is $100 smaller
2. SD Registered Agent.org: best for a company that stays in one state
South Dakota onlySD Registered Agent.org is line 2: the $99 renewal holds its three-year subtotal at $397.
Filing the annual report falls to you.
Line includes
- The filing made on your behalf
- Agent service in year one
Credits
- Agent included at the start
- $99 yearly from year two
- $199 added to the state fee
Debits
- The annual report sits outside the price
- The EIN application costs $99 more
3. South Dakota Registered Agent.co: best for companies that stay home
South Dakota onlySouth Dakota Registered Agent.co is line 3: the $99 renewal holds its three-year subtotal at $397.
Filing the annual report falls to you.
It matches SD Registered Agent.org to the dollar.
Line includes
- The filing made on your behalf
- Agent service in year one
Credits
- Agent included at the start
- $199 added to the state fee
- $99 yearly from year two
Debits
- The annual report sits outside the price
- The EIN application costs $99 more
Cumulative ledger
| Line | Provider | Total, year 1 | Total, year 2 | Total, year 3 | Total, year 5 | |
|---|---|---|---|---|---|---|
| 1 | Mainstay Filing | $199 | $398 | $597 | $995 | Visit Mainstay FilingPartner link. We may earn money if you buy. |
| 2 | SD Registered Agent.org | $199 | $298 | $397 | $595 | Visit SD Registered Agent.orgPartner link. We may earn money if you buy. |
| 3 | South Dakota Registered Agent.co | $199 | $298 | $397 | $595 | Visit South Dakota Registered Agent.coPartner link. We may earn money if you buy. |
Crossover check
What South Dakota charges itself
| Entry | Amount | Cited from |
|---|---|---|
| Fee to file the articles | $150 | sdlegislature.gov (read October 2026) per the state |
| Annual report | $55 every year | sdlegislature.gov (read October 2026) per the state |
| Late filing | $50 | sdlegislature.gov (read October 2026) per the state |
| Paid to the state by year 3 | $260 | Computed from the lines above |
What settled the order
Mainstay Filing indexed above SD Registered Agent.org on coverage per dollar, a 32% column.
Filing the annual report for you outweighed SD Registered Agent.org's lower three-year subtotal.
EIN included, the crossover year is 2: Mainstay Filing passes SD Registered Agent.org.
Official South Dakota LLC filing fee and requirements
What to file: the Articles of Organization. Where: the South Dakota Secretary of State. How much: $150. Every LLC must name a registered agent with an in-state street address.
Source text: sdlegislature.gov (read October 2026) per the state
The state-fees-only line
Filing on your own leaves only the state's fees, $260 across three years. The service lines add $397 to $597 for the paperwork and the agent.
Common questions
How much does LLC formation service cost in South Dakota?
$199 in year one among our lines, plus the $150 state fee.
What is the three-year subtotal for these services?
$397 to $597 across the lines, before state fees.
What fee does South Dakota charge to file an LLC?
$150 when you submit the Articles of Organization.
What does South Dakota charge after the first year?
After formation, South Dakota expects the annual report at $55 every year, due during the entity's anniversary month.
Does any line include the EIN application?
Mainstay Filing: included; SD Registered Agent.org: $99; South Dakota Registered Agent.co: $99.
When does one line pass another in total cost?
Not within ten years; no line overtakes another.
Which LLC formation service indexes best in South Dakota?
Line one is Mainstay Filing, line two SD Registered Agent.org, line three South Dakota Registered Agent.co.
Source lines
- August 2026 confirmation of South Dakota Secretary of State at sdsos.gov.
- August 2026 confirmation of South Dakota Secretary of State at sosenterprise.sd.gov.
- October 2026 confirmation of South Dakota yearly filing: Annual at sdlegislature.gov.
- August 2026 confirmation of South Dakota report due date at sdlegislature.gov.
- August 2026 confirmation of SDCL 47-34A-203 at sdlegislature.gov.
- October 2026 confirmation of South Dakota formation fee: Filing at sdsos.gov.
- October 2026 confirmation of South Dakota formation fee: Filing at sdlegislature.gov.
- October 2026 confirmation of South Dakota registered agent statute at sdlegislature.gov.
- Mainstay Filing South Dakota service page (read November 13, 2026)
- SD Registered Agent.org pricing page (read November 13, 2026)
- South Dakota Registered Agent.co pricing page (read November 13, 2026)