South Dakota: ordered by value
Service prices only. State fees do not depend on which agent you name.
1. Mainstay Filing: best for companies that may add states
Row one
Year one $149, renewals $149
- First year
- $149
- Renewal
- $149/yr
- Three-year tally
- $447
Mainstay Filing leads the South Dakota ledger. The entries: $149 a year with renewal at $149, and one account for any state.
Spend $150 more than South Dakota Registered Agent.co across three years and the recurring paperwork comes off your list.
Included lines
- Registered office on file
- Three government mailings a year scanned free
- Covers LLCs, corporations, LPs, LLPs and nonprofits
Gains
- Valid wherever the LLC registers
- Flat $149/yr and no change at renewal
Minus column
- Costs $50/yr more than South Dakota Registered Agent.co
- Report filing takes the formation package
2
2. South Dakota Registered Agent.co: best for tight budgets
Local line
Year one $99, renewals $99
- First year
- $99
- Renewal
- $99/yr
- Three-year tally
- $297
Row 2, South Dakota Registered Agent.co, books this way: three years total $297 for a company that stays put.
Included lines
- A local address on file
- Scans of papers in your account
Gains
- The entry stays at $99 a year
- Beats Mainstay Filing on yearly price
Minus column
- Other states need another company
- The annual report is not in the bundle
3
3. SD Registered Agent.org: best for a local alternative
Local line
Year one $99, renewals $99
- First year
- $99
- Renewal
- $99/yr
- Three-year tally
- $297
Row 3, SD Registered Agent.org, books this way: three years total $297 for a company that stays put.
Same posted prices as South Dakota Registered Agent.co.
Included lines
- A local address on file
- Scans of papers in your account
Gains
- The entry stays at $99 a year
- Beats Mainstay Filing on yearly price
Minus column
- Other states need another company
- The annual report is not in the bundle
The tally after 1, 2, 3 and 5 years
Company prices on November 13, 2026, summed year by year. No row overtakes another within ten years.
Break-even check
Change the years to re-tally the rows.
Official state fees
To reproduce the bottom line, add the filing, the year-two report, the year-three report and any minimum tax. Costs without a fixed amount stay out of it.
Notes on the order
At 28%, jobs ticked off is the column that decided the first row.
A single agent for any state outscored the one-state row.
South Dakota registered agent rules (official, 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: 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.
From: from sdlegislature.gov, recorded October 2026 as a ledger line
The zero-service option
Acting as your own registered agent adds nothing when you qualify. The rows above charge $99 to $149 a year for the in-state address.
FAQ
What does a South Dakota registered agent cost per year?
$99 to $149 a year across our rows.
What do three years of agent service cost?
Year one plus two renewals comes to $297 to $447.
Must an LLC in South Dakota name a registered agent?
Yes. Every LLC must name a registered agent with an in-state street address.
Can I be my own registered agent?
You can, provided you meet the address and eligibility rules.
What does the LLC pay the state each year?
$55 each year for the annual report, due due during the entity's anniversary month.
When does one service turn into the lower total?
The lines do not cross during the first ten years.
Which registered agent is the best value in South Dakota?
Mainstay Filing comes first, with South Dakota Registered Agent.co and SD Registered Agent.org behind it.
Record of sources
- South Dakota Secretary of State (sdsos.gov), tallied August 2026
- South Dakota Secretary of State (sosenterprise.sd.gov), tallied August 2026
- South Dakota yearly filing: Annual (sdlegislature.gov), tallied October 2026
- South Dakota report due date (sdlegislature.gov), tallied August 2026
- SDCL 47-34A-203 (sdlegislature.gov), tallied August 2026
- South Dakota formation fee: Filing (sdsos.gov), tallied October 2026
- South Dakota formation fee: Filing (sdlegislature.gov), tallied October 2026
- South Dakota registered agent statute (sdlegislature.gov), tallied October 2026
- Booked November 13, 2026 from the Mainstay Filing South Dakota service page
- Booked November 13, 2026 from the South Dakota Registered Agent.co pricing page
- Booked November 13, 2026 from the SD Registered Agent.org pricing page