Explained · South Dakota
3 Best LLC Services in South Dakota (2026), Explained
Summary
- State filing charge
- $150, a single payment
- Later years
- $55 each year
- Registered agent
- Yes, required
- Our recommendations
- SD Registered Agent.org, Mainstay Filing then South Dakota Registered Agent.co
Who we recommend in South Dakota
Best first. See how we pick for the reasoning.1. SD Registered Agent.org: best for budget-minded owners
Year one costs $199; later years cost $99
Why SD Registered Agent.org? You pay $199 at the start with the first agent year included and $99 annually after that.
A lower three-year total than Mainstay Filing gives it the lead for a company that stays put.
Its price leaves out the annual report.
Includes
- Formation filing handled
- No agent charge in year one
Points in its favor
- $99 a year afterward
- Year-one agent service is included
- $199 to get started
Where it falls short
- Nothing in the price touches the annual report
- Charges $99 to apply for the EIN
2. Mainstay Filing: best for knowing the yearly bill in advance
$199 a year, renewing at $199
Our second recommendation, Mainstay Filing, earns it since it files the annual report for you, which none of the others do, for $199 a year.
SD Registered Agent.org is $200 less over three years, which is enough to place it higher.
Filing the annual report is included, and the $55 state fee is passed along as is.
Includes
- Your LLC filed with the state
- Registered agent for twelve months
- Annual report filed by Mainstay
- EIN application
- State fee passed through as is
Points in its favor
- $199 a year pays for the filing, the agent and the report
- Year two is $199
- Takes care of the EIN application
Where it falls short
- Carries a $100 annual premium over SD Registered Agent.org
3. South Dakota Registered Agent.co: best for a low agent renewal
Year one costs $199; later years cost $99
South Dakota Registered Agent.co takes the third slot: you pay $199 at the start with the first agent year included and $99 annually after that.
Its price leaves out the annual report.
It charges exactly what SD Registered Agent.org charges; either would serve you well.
Includes
- Formation filing handled
- No agent charge in year one
Points in its favor
- Year-one agent service is included
- $199 to get started
- $99 a year afterward
Where it falls short
- Nothing in the price touches the annual report
- Charges $99 to apply for the EIN
Numbers side by side
| # | Company | First-year price | Renewal price | Over three years | Included in the price | |
|---|---|---|---|---|---|---|
| 1 | SD Registered Agent.org | $199 | $99/yr | $397 | formation filing handled; no agent charge in year one | Go to SD Registered Agent.orgPartner link. We may earn money if you buy. |
| 2 | Mainstay Filing | $199 | $199/yr | $597 | Your LLC filed with the state; registered agent for twelve months; Annual report filed by Mainstay | Go to Mainstay FilingPartner link. We may earn money if you buy. |
| 3 | South Dakota Registered Agent.co | $199 | $99/yr | $397 | formation filing handled; no agent charge in year one | Go to South Dakota Registered Agent.coPartner link. We may earn money if you buy. |
The questions, one by one
How much money should I set aside?
The state charges $150. A service adds $199 in the first year.
By the end of year three the state will have taken $260. as of October 2026: sdlegislature.gov
Who receives the filing?
To get started, file the Articles of Organization with the South Dakota Secretary of State, as the state instructs.
The state's timeline: Paper 1 to 3 business days; online processed immediately. as of October 2026: sdlegislature.gov
Does the state insist on a registered agent?
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.
as of October 2026: sdlegislature.gov
What is due in later years?
What recurs is the annual report: annual, $55. In the state's words it falls due due during the entity's anniversary month, so keep an eye on it.
A late filing adds $50.
as of October 2026: sdlegislature.gov
Can I do the filing without help?
Yes, and the cost is then the state's $260 over three years.
The trade is $397 to $597 over three years in exchange for not filing every form yourself.
Why is the first pick first?
SD Registered Agent.org leads on what three years cost, a criterion that carries 34% of the weight.
The two heaviest criteria are what three years cost (34%) and how much work the price handles (28%), with three lighter ones behind them.
Over three years SD Registered Agent.org totals $397, which is $200 below Mainstay Filing.
South Dakota: rules and fees at a glance
| Item | Detail | Where it comes from |
|---|---|---|
| Cost of filing | $150 | as of October 2026: sdlegislature.gov |
| Registered agent | Yes, required | as of October 2026: sdlegislature.gov |
| Annual report | $55 every year | as of October 2026: sdlegislature.gov |
| Three-year state total | $260 | Computed from the lines above |
FAQ
How long until the LLC exists?
Paper 1 to 3 business days; online processed immediately.
Does the price include the EIN application?
It is part of the Mainstay Filing price, while SD Registered Agent.org bills $99 and South Dakota Registered Agent.co bills $99.
How much is a late filing?
South Dakota adds $50.
How do the picks compare over three years?
SD Registered Agent.org: $397 | Mainstay Filing: $597 | South Dakota Registered Agent.co: $397, not counting state fees.
What are your sources?
Each state fee links to its official source, and each service price comes from the company's website.
Who would you hire first in South Dakota?
SD Registered Agent.org is on top because three years add up to $397 with the $99 renewal; Mainstay Filing and South Dakota Registered Agent.co follow.
Documents and pricing pages behind this page
- sdsos.gov: South Dakota Secretary of State (confirmed August 2026)
- sosenterprise.sd.gov: South Dakota Secretary of State (confirmed August 2026)
- sdlegislature.gov: South Dakota yearly filing: Annual (confirmed October 2026)
- sdlegislature.gov: South Dakota report due date (confirmed August 2026)
- sdlegislature.gov: SDCL 47-34A-203 (confirmed August 2026)
- sdsos.gov: South Dakota formation fee: Filing (confirmed October 2026)
- sdlegislature.gov: South Dakota formation fee: Filing (confirmed October 2026)
- sdlegislature.gov: South Dakota registered agent statute (confirmed October 2026)
- sdsos.gov: Processing, official source (confirmed October 2026)
- SD Registered Agent.org pricing page, read November 13, 2026
- Mainstay Filing South Dakota service page, read November 13, 2026
- South Dakota Registered Agent.co pricing page, read November 13, 2026