How to start an LLC in South Dakota
A step-by-step guide to forming and maintaining an LLC in South Dakota — including the $150 filing fee, ongoing costs, registered agent rules, and taxes.
Last reviewed: June 2026
South Dakota LLC overview
Forming an LLC in South Dakota starts with filing your formation documents and paying the $150 state filing fee. South Dakota requires an ongoing report with a fee of about $50 to stay in good standing. South Dakota requires an annual report ($50).
An LLC gives you personal-asset protection and pass-through taxation, and it’s usually straightforward to set up yourself. South Dakota also has no state personal income tax, which appeals to many owners.
How to form an LLC in South Dakota: 7 steps
- 1
Name your South Dakota LLC
Your name must be distinguishable from other South Dakota businesses and include a designator such as “LLC” or “Limited Liability Company.” Avoid restricted words (like bank or insurance) unless you qualify. Search the official South Dakota business database to confirm availability, then secure a matching domain before you file.
- 2
Appoint a registered agent
South Dakota requires every LLC to maintain a registered agent with a physical street address in the state to receive legal notices and government mail. You can act as your own agent if you have a South Dakota address and are available during business hours, or hire a service (around $125/year) for privacy and reliability — non-US founders generally must use a service.
- 3
File your formation documents
Officially create your LLC by filing your formation documents (commonly called the Articles of Organization) with the South Dakota Secretary of State and paying the $150 state filing fee. Online filings are usually processed fastest; mailed filings take longer, and expedited processing is often available for an extra fee.
- 4
Create an operating agreement
An operating agreement isn’t always legally required, but every South Dakota LLC should have one. It documents ownership, management, voting, and profit-sharing, and reinforces your liability shield — especially for multi-member LLCs. You can generate a free draft and have an attorney review it.
- 5
Get an EIN from the IRS
An EIN (federal tax ID) is free from the IRS and is needed to open a business bank account, hire employees, and handle taxes. U.S. founders with an SSN can apply online in minutes; non-US founders without an SSN can still get one by filing Form SS-4 by fax or mail.
- 6
Open a business bank account
Keep your business and personal finances strictly separate to protect your liability shield. Open a dedicated business bank account using your approved South Dakota formation documents, your EIN, and your operating agreement.
- 7
Stay compliant year after year
Keep your LLC in good standing by filing your annual report ($50) on time, renewing your registered agent, and meeting your federal and South Dakota tax obligations.
South Dakota LLC cost breakdown
Here’s what forming and running a South Dakota LLC typically costs. A realistic first-year estimate is around $325 if you hire a registered agent — less if you act as your own.
| Item | Cost | Notes |
|---|---|---|
| South Dakota state filing fee | $150 | One-time, paid when you form your LLC. |
| Registered agent | ~$125/yr | Optional — only if you hire a service instead of being your own agent. |
| Annual report | $50/yr | South Dakota requires an annual report ($50). |
| Operating agreement | $0–$200 | Free with a DIY template, or more through a legal service. |
| EIN (federal tax ID) | Free | Issued directly by the IRS. |
Annual report & ongoing compliance
To keep your South Dakota LLC in good standing, you must file a report on time. South Dakota requires an annual report ($50). Missing the deadline can lead to late penalties, loss of good standing, and eventually administrative dissolution — which is far costlier to fix than filing on time.
Our free Compliance Reminder Planner builds a calendar of your key deadlines (with .ics export) so nothing slips.
Taxes for South Dakota LLCs
By default, a South Dakota LLC is a pass-through entity: the business itself usually pays no federal income tax, and profits flow to the owners’ personal returns. As an owner you’ll typically owe federal income tax plus self-employment tax (15.3% for Social Security and Medicare) on your share of the profit.
South Dakota has no state personal income tax, which is a meaningful advantage for resident owners — your pass-through profits aren’t taxed again at the state level on wage-type income.
If you sell taxable goods or services, you may also need to register for and collect South Dakota sales tax. Once profits are consistently high, it’s worth checking whether an S-Corp election could lower your self-employment tax.
South Dakota is good for
- No state income tax
Should you form your LLC in South Dakota?
If you live or do business in South Dakota, forming here is usually simplest — operating in a state typically means you have to register (and pay) there anyway. If you’re an online or non-US founder with no physical presence, it’s worth comparing South Dakota with low-cost, privacy-friendly states like Wyoming and New Mexico.
Compare South Dakota with other statesFrequently asked questions
The South Dakota state filing fee is $150. You’ll also pay about $50 for the annual report. Optional costs include a registered agent service (~$125/year) and an operating agreement. Use our free LLC Cost Calculator for a personalized estimate.
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This tool provides educational estimates and general guidance only. It is not legal, tax, accounting, or financial advice. Always verify requirements with official government sources or consult a qualified professional before making decisions.
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