Registered agent ratings · South Dakota
3 Best Registered Agents in South Dakota (2026)
1. SD Registered Agent.org: best for the lowest yearly amount on this list
$99 a year, level on renewal
SD Registered Agent.org is rated first: $99 a year, flat, with online scans of legal papers served.
SD Registered Agent.org provides the registered office address inside the state and uploads scans of whatever is served there.
Over three years it sums lower than Mainstay Filing, and cost is one of our two heaviest criteria.
What you get
- The in-state address the state requires on file
- Served papers are scanned and placed in your online account
Pros
- Also forms LLCs and includes the first agent year
- A $99 plan that stays level
- Yearly amount under Mainstay Filing's
Trade-offs
- The annual report remains your own filing
- South Dakota only; other states need another agent
2. Mainstay Filing: best for any state
$149 a year, level on renewal
Mainstay Filing is rated second: $149 for a plan that applies in every state, $149 on renewal.
Company not formed yet? Mainstay's $199-a-year package puts the South Dakota filing and the annual report on one line.
SD Registered Agent.org is $150 cheaper on the three-year sum, and that lowers Mainstay Filing's cost rating.
What you get
- A street address in the state on the public record
- Free scan-and-upload of papers served, the day they arrive
- Free scans of the first three government mailings each year
- Compliance reminders
Pros
- Accepts LLCs, corporations, LPs, LLPs and nonprofits
- Government mail scanned free, first three pieces a year
- Same-business-day scans of service of process, no fee
- $149 a year, level on renewal
Trade-offs
- Agent alone is $50 a year above SD Registered Agent.org
- On the agent plan you file your own annual report
3. South Dakota Registered Agent.co: best for businesses in South Dakota
$99 a year, level on renewal
South Dakota Registered Agent.co is rated third: $99 a year, flat, with online scans of legal papers served.
The registered office is an in-state street address from South Dakota Registered Agent.co; anything served on the company is scanned for your account.
Nothing in the published amounts or features separates SD Registered Agent.org from South Dakota Registered Agent.co; take either.
What you get
- A physical street address in the state
- Scans of legal papers served on the company, posted online
Pros
- Yearly amount $99, unchanged when it renews
- Comes in under Mainstay Filing each year
- Forms LLCs as well, first agent year included
Trade-offs
- The annual report remains your own filing
- South Dakota only; other states need another agent
The 3 ratings summarized
| Line | Service | Rating | Yearly amount | Renewal amount | Best for | Open |
|---|---|---|---|---|---|---|
| 1 | SD Registered Agent.org | 9.3 | $99 | $99/yr | The lowest yearly price we rank here | Visit SD Registered Agent.orgPartner link. We may earn money if you buy. |
| 2 | Mainstay Filing | 8.9 | $149 | $149/yr | A single agent in any state | Visit Mainstay FilingPartner link. We may earn money if you buy. |
| 3 | South Dakota Registered Agent.co | 8.8 | $99 | $99/yr | The lowest yearly price we rank here | Visit South Dakota Registered Agent.coPartner link. We may earn money if you buy. |
South Dakota registered agent amounts for 2026: year one, renewal and three-year sum
| Service | Year one | Year two | Year three | Three-year sum | Same amount on renewal |
|---|---|---|---|---|---|
| SD Registered Agent.org | $99 | $99 | $99 | $297 | Yes |
| Mainstay Filing | $149 | $149 | $149 | $447 | Yes |
| South Dakota Registered Agent.co | $99 | $99 | $99 | $297 | Yes |
Why SD Registered Agent.org is on top
Weights: 27% cost over years one to three, 27% inclusions per price, 46% shared by renewal price and terms, fit with state rules and price clarity. Cost over years one to three decided South Dakota.
SD Registered Agent.org sums to $297 across three years, $150 below Mainstay Filing. For a company that needs an agent in South Dakota only, fifty-state coverage adds little, so the lower yearly amount decided the rating.
Each criterion and its weight is listed on How we rank.
South Dakota registered agent requirements per South Dakota Secretary of State (official)
Every LLC must name a registered agent with an in-state street address. 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. Authority cited: SDCL 59-11-6.
The South Dakota annual report: amount, date and agent
South Dakota LLCs owe the annual report every year, due due during the entity's anniversary month. Amount: $55. Late filing adds $50. The state sends notices about it to your registered agent.
South Dakota registered agent: your questions
Does a South Dakota LLC need to appoint a registered agent?
It does. South Dakota treats a registered agent as a standing requirement, and the agent needs a street address within the state.
What is the yearly price of a registered agent in South Dakota?
Yearly amounts run $99 to $149, and each holds on renewal.
Is it permitted to be your own registered agent?
Yes, when the state's conditions are met. 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.
On what date is the South Dakota annual report due?
Due due during the entity's anniversary month. Fee: $55. Late penalty: $50.
Which registered agents are rated on this page?
SD Registered Agent.org ($99 a year), Mainstay Filing ($149 a year) and South Dakota Registered Agent.co ($99 a year), highest rated first.
Which South Dakota registered agent has the best value rating?
SD Registered Agent.org, as $99 a year, level on renewal, the lowest yearly price on this list.
Source lines
- South Dakota Secretary of State, Business Services / Corporations Division (ledger date August 2026)
- South Dakota Secretary of State, Business Services / Corporations Division (ledger date August 2026)
- South Dakota yearly filing: Annual report: fee and how, official source (ledger date October 2026)
- South Dakota report due date (ledger date August 2026)
- SDCL 47-34A-203 (ledger date August 2026)
- South Dakota formation fee: Filing fee, official source (ledger date October 2026)
- South Dakota formation fee: Filing fee, official source (ledger date October 2026)
- South Dakota registered agent statute (ledger date October 2026)
- SD Registered Agent.org, pricing and service pages: amounts read November 12, 2026
- Mainstay Filing, South Dakota service page: amounts read November 12, 2026
- South Dakota Registered Agent.co, pricing and service pages: amounts read November 12, 2026