Registered agent required
Yes
According to sdlegislature.gov, as of October 2026
Registered agent guide · South Dakota
South Dakota Registered Agents (2026): State Rules, Fees and the 3 Best Agents
For a registered agent in South Dakota in 2026, we recommend South Dakota Registered Agent.co ($99 a year), SD Registered Agent.org ($99 a year) and Mainstay Filing ($149 a year), in that order. South Dakota law calls for a registered agent on every LLC. State charges that recur come to $55 per year (30th of 50).
What South Dakota charges
Annual report
$55 / yr
The state sets the deadline as due during the entity's anniversary month. According to sdlegislature.gov, as of October 2026
State charges, per year
$55
One year of the report plus any minimum tax
The South Dakota picks
How the order came about: three-year service charges first, then coverage, renewal, South Dakota fit and fee labeling (methodology).
1. South Dakota Registered Agent.co: best for companies that stay in South Dakota
$99 annually, no change at renewal
First on the list is South Dakota Registered Agent.co, since $99 per year for an agent whose office address is inside the state.
The three-year service bill is smaller than Mainstay Filing's, which is our heaviest criterion.
What the price buys
- An office address supplied for the registered agent role
- Scans of any served papers appear in your online account
In its favor
- $99 annually
- Its yearly price sits under Mainstay Filing's
Against it
- Another state means another agent
- You file the annual report yourself
2. SD Registered Agent.org: best for another South Dakota choice
$99 annually, no change at renewal
SD Registered Agent.org comes next: $99 per year for an agent whose office address is inside the state.
On price it is level with South Dakota Registered Agent.co.
What the price buys
- An office address supplied for the registered agent role
- Scans of any served papers appear in your online account
In its favor
- Its yearly price sits under Mainstay Filing's
- $99 annually
Against it
- Another state means another agent
- You file the annual report yourself
3. Mainstay Filing: best for an agent wherever you register
$149 annually, no change at renewal
In third place we have Mainstay Filing, because one agent price, $149, in all fifty states, so a growing company keeps a single vendor.
South Dakota Registered Agent.co is $150 cheaper over three years, which explains why it ranks higher.
What the price buys
- A South Dakota office address printed on the public record
- Anything served on the company is scanned and sent to you that business day, free of charge
- The first three letters from government agencies each year are scanned at no charge
- Also open to nonprofits, partnerships and corporations, not only LLCs
In its favor
- Price $149, renewal $149
- Any state at one price
Against it
- Costs $50 more each year than South Dakota Registered Agent.co
- It covers the agent role alone, so you send in the reports
Prices side by side
| No. | Service | Yearly price | Renews at | Service charges, three years | |
|---|---|---|---|---|---|
| 1 | South Dakota Registered Agent.co | $99 | $99/yr | $297 | Visit South Dakota Registered Agent.coPartner link. We may earn money if you buy. |
| 2 | SD Registered Agent.org | $99 | $99/yr | $297 | Visit SD Registered Agent.orgPartner link. We may earn money if you buy. |
| 3 | Mainstay Filing | $149 | $149/yr | $447 | Visit Mainstay FilingPartner link. We may earn money if you buy. |
Company price pages, copied November 12, 2026. Whichever agent you pick, South Dakota collects the same.
Agent and state charges, by year
Each agent's price is combined with the state charges that repeat (the annual report from year two). Formation fees are not in the total.
South Dakota next to the states ranked around it
| Place | State | Yearly state fees |
|---|---|---|
| 27th | North Dakota | $50 |
| 27th | Virginia | $50 |
| 30th | South Dakota | $55 |
| 31st | Georgia | $60 |
| 31st | Wyoming | $60 |
All fifty states appear in Registered agent rules by state.
What South Dakota law requires of a registered agent
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.
Who may serve: 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. Legal basis: SDCL 59-11-6.
South Dakota's recurring fees
The state's mail about the annual report arrives at your registered agent. The report costs $55 every year and is due due during the entity's anniversary month.
How we ordered the South Dakota picks
Of our five criteria, three-year service charge (34%) is what put South Dakota Registered Agent.co above SD Registered Agent.org in South Dakota.
At $297 for three years, $150 less than Mainstay Filing, South Dakota Registered Agent.co wins on cost.
South Dakota FAQ
Does every South Dakota LLC need a registered agent?
Yes. Every LLC must name a registered agent with an in-state street address.
Who may act as the registered agent for South Dakota LLCs?
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.
What is the yearly price of registered agent service for South Dakota?
Budget $99 to $149 each year.
What does the state itself charge an LLC each year?
About $55 a year by our yearly measure, which comes from the annual report ($55 every year).
Which registered agents are recommended on this page?
South Dakota Registered Agent.co ($99 a year), SD Registered Agent.org ($99 a year) and Mainstay Filing ($149 a year), with the best one first.
Which registered agent is the best choice?
South Dakota Registered Agent.co first, then SD Registered Agent.org and Mainstay Filing. What separates South Dakota Registered Agent.co is three-year service charge.
Sources for this chapter
- South Dakota Secretary of State, Business Services / comes from sdsos.gov; page opened August 2026
- South Dakota Secretary of State, Business Services / comes from sosenterprise.sd.gov; page opened August 2026
- South Dakota yearly filing: Annual report: fee and comes from sdlegislature.gov; page opened October 2026
- South Dakota report due date comes from sdlegislature.gov; page opened August 2026
- SDCL 47-34A-203 comes from sdlegislature.gov; page opened August 2026
- South Dakota formation fee: Filing fee, official source comes from sdsos.gov; page opened October 2026
- South Dakota formation fee: Filing fee, official source comes from sdlegislature.gov; page opened October 2026
- South Dakota registered agent statute comes from sdlegislature.gov; page opened October 2026
- North Dakota Secretary of State, Business Division comes from sos.nd.gov; page opened August 2026
- North Dakota Secretary of State, Business Division comes from sos.nd.gov; page opened August 2026
- Virginia yearly filing: Recurring filing, official source comes from law.lis.virginia.gov; page opened October 2026
- Virginia yearly filing: Recurring filing, official source comes from scc.virginia.gov; page opened October 2026
- Georgia Secretary of State fee schedule Rev. 8/2025 comes from sos.ga.gov; page opened October 2026
- Wyoming Secretary of State, Business Division comes from wyobiz.wyo.gov; page opened August 2026
- Wyoming Secretary of State, Business Division comes from wyobiz.wyo.gov; page opened August 2026
- South Dakota Registered Agent.co, pricing page: copied from the company site November 12, 2026
- SD Registered Agent.org, pricing page: copied from the company site November 12, 2026
- Mainstay Filing, South Dakota service page: copied from the company site November 12, 2026