Registered agent cost calculators + South Dakota
3 Best Registered Agents in South Dakota (2026): Cost Calculator
Result order: Best value first, from our five-term calculation
South Dakota results
Ranked results
1. Mainstay Filing: best for a nationwide agent
Best valueMainstay Filing gives the best result in South Dakota: $149 a year in this state and the same $149 in the next one.
South Dakota Registered Agent.co is $150 lower at year three, but the 27% coverage term still ranks this one first.
Inputs covered
- A street address located in the state
- Up to three government mailings a year, scanned free
- Covers LLCs, corporations, LPs, LLPs and nonprofits
Adds up well
- $149 a year, no change at renewal
- Fifty-state reach
Adds up badly
- $50 a year above South Dakota Registered Agent.co
- Covers the agent role only
2. South Dakota Registered Agent.co: best for a single state to cover
South Dakota focusNext in the results, South Dakota Registered Agent.co: agent service in one state for $99 a year.
Inputs covered
- An office address located in the state
- Papers served on the LLC scanned to your account
Adds up well
- Annual figure below the national option
- $99 a year, no change at renewal
Adds up badly
- Another state means another agent
- Does not include the annual report
3. SD Registered Agent.org: best for a second local option
South Dakota focusNext in the results, SD Registered Agent.org: agent service in one state for $99 a year.
No difference in price from South Dakota Registered Agent.co.
Inputs covered
- An office address located in the state
- Papers served on the LLC scanned to your account
Adds up well
- $99 a year, no change at renewal
- Annual figure below the national option
Adds up badly
- Another state means another agent
- Does not include the annual report
Year-by-year totals
| Rank | Service | Result, year 1 | Result, year 2 | Result, year 3 | Result, year 5 | |
|---|---|---|---|---|---|---|
| 1 | Mainstay Filing | $149 | $298 | $447 | $745 | Open Mainstay FilingPartner link. We may earn money if you buy. |
| 2 | South Dakota Registered Agent.co | $99 | $198 | $297 | $495 | Open South Dakota Registered Agent.coPartner link. We may earn money if you buy. |
| 3 | SD Registered Agent.org | $99 | $198 | $297 | $495 | Open SD Registered Agent.orgPartner link. We may earn money if you buy. |
Break-even test
South Dakota state fees (official)
| Input | Amount | Source |
|---|---|---|
| Filing to form the LLC | $150 | sdlegislature.gov {input read October 2026, shown in full} |
| Annual report | $55 every year | sdlegislature.gov {input read October 2026, shown in full} |
| Late report | $50 | sdlegislature.gov {input read October 2026, shown in full} |
| State side, 3 years | $260 | Our sum |
The working behind South Dakota
For South Dakota, the deciding term was filing work in the price (27% of the formula), where Mainstay Filing came out ahead.
South Dakota Registered Agent.co costs less here, but reach across fifty states weighed more.
The South Dakota registered agent rule as the state states it (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.
Source wording: sdlegislature.gov {input read October 2026, shown in full}
State fees only
A qualifying owner pays no extra to skip a service. The prices above, $99 to $149 a year, buy convenience.
Common questions
What does a South Dakota registered agent charge per year?
Plan on $99 to $149 a year.
What do three years of agent service cost?
Service results after three years: $297 to $447.
Is a registered agent a must for a South Dakota LLC?
Yes, it does. Every LLC must name a registered agent with an in-state street address.
Can the owner be the registered agent?
You can, provided you meet both the address and eligibility rules.
What does the state charge the LLC each year?
Plug in $55 every year for the annual report, due due during the entity's anniversary month.
When does one service pass another in total cost?
The results do not cross in the first ten years.
Which registered agent calculates best in South Dakota?
Ranked results: Mainstay Filing, South Dakota Registered Agent.co and SD Registered Agent.org.
Input sources
- Input for South Dakota Secretary of State comes from sdsos.gov, entered August 2026.
- Input for South Dakota Secretary of State comes from sosenterprise.sd.gov, entered August 2026.
- Input for South Dakota yearly filing: Annual comes from sdlegislature.gov, entered October 2026.
- Input for South Dakota report due date comes from sdlegislature.gov, entered August 2026.
- Input for SDCL 47-34A-203 comes from sdlegislature.gov, entered August 2026.
- Input for South Dakota formation fee: Filing comes from sdsos.gov, entered October 2026.
- Input for South Dakota formation fee: Filing comes from sdlegislature.gov, entered October 2026.
- Input for South Dakota registered agent statute comes from sdlegislature.gov, entered October 2026.
- Input from Mainstay Filing: South Dakota service page (November 13, 2026)
- Input from South Dakota Registered Agent.co: pricing page (November 13, 2026)
- Input from SD Registered Agent.org: pricing page (November 13, 2026)