South Dakota Secretary of State filings, deadlines, and how to do them right.
Annual reports, business search, registered agent changes, reinstatement, dissolution, tax registration. Every South Dakota filing explained, plus the business environment, regulatory bodies, and a year-round compliance calendar. Verified against the South Dakota Secretary of State, Corporations Division as of June 2026.
Why founders choose South Dakota (and what to know first)
No state personal or corporate income tax. No franchise tax. Strong credit card and banking industry hub (Sioux Falls). Anonymous LLC option. Reasonable filing fees.
Tax obligations at a glance
Tax obligations depend on entity type, where you operate, and where revenue is sourced. Consult a licensed CPA for entity-specific advice. File.Business connects you with vetted CPAs in South Dakota on request.
Other South Dakota agencies your business will touch
The Secretary of State handles formation and corporate filings. These agencies handle the rest of your South Dakota compliance.
Sales tax, withholding (no income tax)
Unemployment insurance, professional licensing
Insurance licensing
Workers comp
Banking and trust regulation
Alcohol licensing
Year-round filings every South Dakota business should know
Recurring federal and state deadlines that affect South Dakota businesses. Our Compliance Calendar tracks these and 200+ others against your entity.
How to form an LLC in South Dakota: step by step
Each step explained with what South Dakota requires. File.Business handles all of this for $0 service fee plus the $150 state fee.
Search the state business name database to confirm the name is distinguishable. Must include LLC, L.L.C., or Limited Liability Company.
State street address required (no P.O. Box). The agent must accept the appointment and be available during business hours.
Submit to the Secretary of State with the state filing fee. Online filing is the fastest channel.
Not filed with the state but legally important. Defines members, contributions, distributions, and manager rules.
IRS Form SS-4. Online if a member has an SSN; mail/fax if all members are non-US.
Most banks require: Articles, EIN letter, operating agreement, and beneficial-owner ID.
Department of Revenue for sales tax, withholding accounts if hiring employees.
Ready to file your South Dakota paperwork the easy way?
Five minutes per filing. State fee passed through at cost. Audit trail and deadline tracking included.
Disclosure. File.Business is a private business filing and compliance service. We are not a government agency and are not affiliated with the South Dakota Secretary of State, Corporations Division or any Secretary of State office. You may file directly with the South Dakota Secretary of State, Corporations Division. Information on this page is for general guidance only and is not legal, tax, or accounting advice. Filing fees and deadlines verified against the South Dakota Secretary of State, Corporations Division as of June 2026 and may change. For entity-specific guidance, consult a licensed South Dakota attorney or CPA.
Every South Dakota Secretary of State topic, in one place.
24 keyword-focused guides covering every filing, form, and compliance question for South Dakota businesses.