How to Start an LLC in South Dakota
Forming an LLC in South Dakota costs $150 in state filing fees, paid to the South Dakota Secretary of State. Here is the full process, the real costs and the South Dakota-specific rules most guides skip.
What it costs
| Item | Cost | Required? |
|---|---|---|
| State filing fee (South Dakota Secretary of State) | $150 | Yes, one time |
| Annual report | $50 | Yes, recurring |
| Registered agent service | $100–$200 / year | Optional (you can be your own) |
| EIN from the IRS | Free | Yes, for banking and taxes |
| Operating agreement | Free–$200 | Strongly recommended |
Step by step
Choose and check your LLC name
Your name must be distinguishable from existing South Dakota entities and include "LLC" or "Limited Liability Company". Search availability for free on the South Dakota Secretary of State website before you fall in love with a name.
Appoint a registered agent
Required by law: a person or company with a physical street address in South Dakota, available during business hours to receive legal mail. You can be your own agent if you live in the state; most founders who value privacy or don't live there use a service ($100 to $200 per year).
File your formation documents ($150)
File Articles of Organization (in some states called a Certificate of Formation) with the South Dakota Secretary of State. Standard processing: immediately online. This is the step that legally creates the LLC.
Get your EIN from the IRS (free)
The Employer Identification Number is your LLC's federal tax ID, needed for bank accounts, hiring and taxes. Apply directly at irs.gov, it takes minutes and costs nothing. Never pay a service just for an EIN.
Create an operating agreement
South Dakota does not legally require an operating agreement, but banks, investors and courts expect one, and it is the document that protects your limited liability if ownership is ever disputed.
Handle ongoing compliance
South Dakota requires an annual report of $50. Calendar it the day your LLC is approved, missing it risks late fees and eventually administrative dissolution.
South Dakota LLC: frequently asked questions
How much does it cost to start an LLC in South Dakota?
The state filing fee is $150, paid to the South Dakota Secretary of State. Ongoing state cost: $50. Optional costs include a registered agent service (typically $100 to $200 per year) if you don't act as your own.
How long does it take to form an LLC in South Dakota?
Standard processing is: immediately online. Many states offer paid expedited options if you need the LLC approved faster. The clock starts when the South Dakota Secretary of State receives your filing.
Do I need a registered agent in South Dakota?
Yes. Every South Dakota LLC must continuously maintain a registered agent with a physical street address in the state to receive legal and official mail. You can serve as your own agent if you have a South Dakota address and are available during business hours, or hire a commercial registered agent service.
What happens if I miss the South Dakota annual report?
The report costs $50 and missing the deadline typically triggers late fees, loss of good standing and eventually administrative dissolution of the LLC. Reinstatement is possible but costs more than filing on time.
Not sure whether South Dakota fits your situation?
Before you choose a filing package, talk through your business, location and goals with a real setup specialist. Get a clear formation roadmap at no cost and with no purchase obligation.
Request my free setup callLaunch.llc is free. If a formation partner fits and you choose to move forward, the partner may pay us a referral fee.
Compare with other states
Fees and rules last reviewed July 2026. State fees change; always confirm with the South Dakota Secretary of State before filing. This guide is general information, not legal or tax advice.