South Dakota board, ranked
Each quote shows year one, the price from year two and the three-year reading. Your choice of agent leaves state fees unchanged.
1. Mainstay Filing: best for a fifty-state agent
Leads the board
Opening quote $149; renewal quote $149
- Opening quote
- $149
- Renewal quote
- $149/yr
- Reading at year 3
- $447
Mainstay Filing ranks first. Reading: $149 a year here and the same $149 in every other state.
South Dakota Registered Agent.co saves $150 over three years and leaves more filings with you.
Quote includes
- An office address inside the state
- Three government mailings a year, scanned free of charge
- Also serves nonprofits, corporations, LPs and LLPs
Reads well
- $149 every year
- Travels with the company
Reads poorly
- A yearly gap of $50
- Report filing needs the formation package
2
2. South Dakota Registered Agent.co: best for the smallest annual quote
South Dakota only
Opening quote $99; renewal quote $99
- Opening quote
- $99
- Renewal quote
- $99/yr
- Reading at year 3
- $297
Next on the board, South Dakota Registered Agent.co: $297 over three years for a company that stays put.
Quote includes
- An address in the state on record
- Legal documents posted to your account
Reads well
- A smaller annual reading than Mainstay Filing
- Constant $99 per year
Reads poorly
- Expanding means finding a new agent
- Leaves the annual report out
3
3. SD Registered Agent.org: best for keeping everything in state
South Dakota only
Opening quote $99; renewal quote $99
- Opening quote
- $99
- Renewal quote
- $99/yr
- Reading at year 3
- $297
Next on the board, SD Registered Agent.org: $297 over three years for a company that stays put.
Year one and renewal both equal South Dakota Registered Agent.co's.
Quote includes
- An address in the state on record
- Legal documents posted to your account
Reads well
- Constant $99 per year
- A smaller annual reading than Mainstay Filing
Reads poorly
- Expanding means finding a new agent
- Leaves the annual report out
Running totals at 1, 2, 3 and 5 years
Prices as published November 13, 2026; year one, then renewals added in turn. The ranking by cumulative cost is stable for ten years.
Try another time span
How long will the company run? Set the years and compare.
Official state charges
The three-year state reading adds the filing fee, the reports due in years two and three and any yearly minimum tax. Costs with no fixed amount, such as newspaper publication, are noted but not summed.
How the ranking came out
Mainstay Filing read better than South Dakota Registered Agent.co on filings handled per dollar, a 30% term.
One agent for any state beat the one-state quote.
South Dakota registered agent requirements, quoted from the 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. Statute on point: 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.
Official wording: sdlegislature.gov (logged October 2026) for the record
Filing it yourself, measured
Serving as your own registered agent adds nothing if you qualify. Every quote above bills $99 to $149 a year for the in-state address.
About these readings
What does a South Dakota registered agent charge each year?
$99 to $149 a year across our quotes.
What do three years of agent service cost?
Anywhere from $297 to $447 for three years of service.
Must a South Dakota LLC keep a registered agent on record?
Yes. Every LLC must name a registered agent with an in-state street address.
Is the owner allowed to be the registered agent?
Yes, when you qualify under the rules listed here.
What does the state bill the LLC every year?
After formation South Dakota looks for the annual report each year, at $55, due during the entity's anniversary month.
When does one quote pass another in total cost?
No crossing within ten years; no quote passes another.
Which registered agent ranks best in South Dakota?
Mainstay Filing, which wins on filings handled per dollar. Then South Dakota Registered Agent.co and SD Registered Agent.org.
Logged references
- Reference for South Dakota Secretary of State: sdsos.gov, logged August 2026.
- Reference for South Dakota Secretary of State: sosenterprise.sd.gov, logged August 2026.
- Reference for South Dakota yearly filing: Annual: sdlegislature.gov, logged October 2026.
- Reference for South Dakota report due date: sdlegislature.gov, logged August 2026.
- Reference for SDCL 47-34A-203: sdlegislature.gov, logged August 2026.
- Reference for South Dakota formation fee: Filing: sdsos.gov, logged October 2026.
- Reference for South Dakota formation fee: Filing: sdlegislature.gov, logged October 2026.
- Reference for South Dakota registered agent statute: sdlegislature.gov, logged October 2026.
- South Dakota service page at Mainstay Filing, taken on November 13, 2026
- pricing page at South Dakota Registered Agent.co, taken on November 13, 2026
- pricing page at SD Registered Agent.org, taken on November 13, 2026