South Dakota requires LLCs and corporations to name a registered agent with a physical South Dakota address, either a commercial registered agent registered with the Secretary of State or a noncommercial agent such as an owner. Changing your registered agent costs $10 when filed online (paper filings add a $15 processing fee) as of October 2026. Our recommendation is Mainstay Filing at $149 a year; SD Registered Agent.org is a lower-priced alternative.
Updated October 2026.
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Best Registered Agents in South Dakota (2026)
Comparing services for registered agent service in South Dakota? Start with this ranked shortlist; details for each pick follow the table.
| Rank | Provider | Best for | Price | What’s included |
|---|---|---|---|---|
| 1 | Mainstay Filing | Registered agent service with a flat renewal price | $149/year (renews at $149) | Registered agent service in all 50 states; switching from another agent included (state change fee at cost) |
| 2 | SD Registered Agent.org | South Dakota registered agent service only | $99/year | $99 per year, flat; in-state street address for the registered office; legal documents served on the company are scanned and sent to the owner online |
| 3 | South Dakota Registered Agent.co | South Dakota registered agent service only | $99/year | in-state street address for the registered office; legal documents served on the company are scanned and sent to the owner online |
1. Mainstay Filing
Mainstay Filing is our top pick in South Dakota. It costs $149/year (renews at $149) and covers registered agent service in all 50 states; switching from another agent included (state change fee at cost). The price stays the same every year, with no add-on menu.
2. SD Registered Agent.org
SD Registered Agent.org is a South Dakota registered agent service at $99/year. It provides $99 per year, flat; in-state street address for the registered office; legal documents served on the company are scanned and sent to the owner online. It’s a fit if you only need a registered agent rather than full formation help.
3. South Dakota Registered Agent.co
South Dakota Registered Agent.co is a South Dakota registered agent service at $99/year. It provides in-state street address for the registered office; legal documents served on the company are scanned and sent to the owner online. It’s a fit if you only need a registered agent rather than full formation help.
South Dakota registered agent costs and rules at a glance
| Item | South Dakota (October 2026) |
|---|---|
| Agent types | Commercial registered agent (has a CRA number) or noncommercial registered agent |
| Address | Actual street address in South Dakota for a noncommercial agent |
| Statement of Change of Registered Agent and/or Address | $10 online; paper adds a $15 processing fee |
| LLC Articles of Organization | $150 online, $165 on paper |
| LLC annual report | $55 online, $70 on paper; due during the anniversary month; $50 late fee if delinquent |
| LLC name reservation | $25 |
| Online filing | SOS Business Services Online |
All fees are from the South Dakota Secretary of State’s filing fee schedule.
Do you need a registered agent in South Dakota?
Yes. Every South Dakota LLC and corporation, and every out-of-state company registered to do business there, lists a registered agent with the Secretary of State. The agent’s job is to receive service of process, legal notices and official state mail on the company’s behalf and hand them on to the people who run it.
Lawsuits typically begin with delivery of a summons to that agent, and the clock to respond starts at delivery. If the agent is unreachable, the company can lose a case it never knew existed. A dependable agent is cheap insurance against that outcome.
Commercial or noncommercial: the two kinds of South Dakota agent
South Dakota’s filings ask you to choose between two kinds of agent.
Commercial registered agent A commercial registered agent has registered with the Secretary of State (the registration fee is $100) and is assigned a CRA number. When you appoint one, you give its name and CRA number, which the agent can provide; the state already has its address. If a commercial agent later moves, it files its own statement of change at $10 per entity it represents, and its clients do not need to do anything.
Noncommercial registered agent Any other agent, such as an owner, a manager, a family member or a local attorney, serves as a noncommercial registered agent. For a noncommercial agent, the filing must show an actual street address in South Dakota, plus a mailing address in the state if it is different, and an email address.
An office within your own company South Dakota’s Model Registered Agents Act (SDCL 59-11-6) adds a third route: instead of naming a person or outside company, an entity can designate the title of an office or position within itself, such as “Manager,” so whoever holds that role receives service at the stated South Dakota address.
Can you be your own registered agent in South Dakota?
Yes. An owner with a South Dakota street address can serve as the company’s noncommercial agent. It is the cheapest route, and it can work well for a business with a staffed local office.
The trade-offs are the usual ones, with a South Dakota twist:
- Your name and address appear in the public business search, which anyone can query by registered agent name.
- You need to be reachable at the listed address to accept papers. Ranching, seasonal work and long drives between towns make that harder than it sounds.
- Out-of-state owners, including those who form a South Dakota entity without living there, cannot use their own address and need an in-state agent.
- If you move, you must file a $10 statement of change.
How much does it cost to change a registered agent in South Dakota?
The Statement of Change of Registered Agent and/or Address costs $10 for an LLC or corporation, according to the Secretary of State’s fee schedule as of October 2026. Filing online keeps it at $10. If you print the statement from the online tool and mail it instead, the Secretary of State adds a $15 paper processing fee.
For a full rundown of what a South Dakota LLC costs to form and maintain, Mainstay has a South Dakota LLC cost guide.
How to file a registered agent change in South Dakota
- Choose your new agent. For a commercial agent, ask for its CRA number; for a noncommercial agent, collect its South Dakota street address, mailing address and email.
- Find your Secretary of State Business ID with the business search. Only entities with “Active” status can use the online Statement of Change.
- Open the File a Statement of Change tool, enter your Business ID and the new agent’s details.
- Pay the $10 fee by Visa, MasterCard, Discover or American Express.
- Confirm the new agent appears on your business record.
Signing a statement you know is false is a criminal offense under South Dakota law, so make sure the agent has actually agreed to serve.
What if your current agent quits?
Registered agents can step down. South Dakota provides a Statement of Resignation of Registered Agent for both commercial and noncommercial agents, and the fee schedule lists a commercial agent’s resignation at no fee. If your agent resigns, appoint a replacement promptly with the $10 Statement of Change so the company is never without someone to receive legal papers.
The same applies if a noncommercial agent, often a relative or former partner, moves away or loses touch with the business. South Dakota has no way of knowing the agent is gone until you file the change.
Related South Dakota resources
- How to start an LLC in South Dakota
- South Dakota business name search
- How to start a business in South Dakota
- Generate ideas with the business name generator, then check the domain and handles on namechk
FAQs
Does a South Dakota LLC need a registered agent?
Yes. Every South Dakota LLC, corporation and registered foreign company must name a registered agent with the Secretary of State. The agent can be a commercial registered agent with a CRA number or a noncommercial agent with an actual street address in South Dakota. The agent receives lawsuits and official notices for the company.
How much does it cost to change a registered agent in South Dakota?
The South Dakota Secretary of State charges $10 for a Statement of Change of Registered Agent and/or Address, according to its fee schedule as of October 2026. Filing online through Business Services Online keeps the cost at $10. Printing the statement and mailing it adds a $15 paper processing fee.
What is a commercial registered agent in South Dakota?
A commercial registered agent is a person or company that has registered with the South Dakota Secretary of State, for a $100 fee, to act as registered agent for multiple businesses. Each has a CRA number. Businesses appointing one list its name and CRA number rather than an address, and the agent updates its own address for all clients.
Can I be my own registered agent in South Dakota?
Yes, if you have an actual street address in South Dakota where you can accept legal papers. You would serve as a noncommercial registered agent, and your name and address would appear in the public business search. Owners who live outside South Dakota need an in-state individual or a commercial registered agent.
How much is the South Dakota LLC annual report?
The South Dakota LLC annual report costs $55 when filed online and $70 on paper, according to the Secretary of State’s fee schedule as of October 2026. The report is due during the LLC’s anniversary month and becomes delinquent after the last day of that month, when a $50 late fee is added. Continued failure to file leads to administrative dissolution.
Can I file a South Dakota registered agent change by mail?
Yes. The Secretary of State’s online Statement of Change tool lets you print the completed statement instead of e-filing it. Sign it and mail it with the $10 filing fee plus the $15 paper processing fee. Filing online avoids the extra charge and accepts major credit and debit cards. Only active entities can use the tool.
How much do South Dakota registered agent services charge?
Rates are set by each company. Our first recommendation, Mainstay Filing, is $149 for a year and $149 at renewal, and it takes care of switching from your current agent. SD Registered Agent.org lists $99 per year. If you file the state’s change yourself online, South Dakota charges $10; mailing it adds a $15 processing fee.
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