South Dakota LLC Name Search & Naming Rules (2026)
Your South Dakota LLC name has to clear the Secretary of State's database before you can file. Here's how to search it free and when the name reservation is worth its modest cost.
South Dakota’s LLC name reservation lasts 120 days with a $25 base fee; the current $15 paper-processing layer makes a paper submission $40. The same applicant cannot reserve the same name again until more than 60 days after expiration. Search results and this formatting checker are preliminary; SOS determines acceptance and trademarks require separate review.
- Name search
- Free — SOS database
- Required designator
- LLC or "Limited Liability Company"
- Name reservation
- 120 days; $25 base / $40 paper
- Filed with
- Secretary of State
- Distinguishable rule
- Yes — from all SD entities
- DBA registration
- Available, modest fee
South Dakota LLC Naming Rules
- Required designator: the name must end in "Limited Liability Company," "LLC," or an approved abbreviation.
- Distinguishable on the record: it can't match or closely shadow any entity registered with the Secretary of State.
- Restricted words: terms implying banking, insurance, or government affiliation require proper authorization.
Check the domain before you commit: at $150 a filing, a name mistake isn't expensive to fix in South Dakota — but a branding one is. Before you fall for a name, confirm the .com (or a clean variant) is free and grab the matching social handles. The state check takes a minute; whether your real brand is available online is what actually matters for your long-term business.
Name Checker & Availability Advisor
South Dakota LLC Name Checker & Availability Advisor
Format check + guidance · not a substitute for the SOS search
Availability is determined solely by the South Dakota Secretary of State — run the official search before filing or reserving. Reservation: $25 online, $40 by mail.
How to Search South Dakota Name Availability (Free)
Open the Secretary of State's entity search
Free, searches every LLC, corporation, and registered entity on file in South Dakota.
Search core words without the designator
Search "Black Hills Woodworks" rather than "Black Hills Woodworks LLC" to surface the widest set of potential conflicts.
Check close variants
Minor spelling, spacing, or punctuation differences don't reliably make a name distinguishable — when in doubt, contact the Secretary of State to confirm.
Reserve or file
Clean search + ready to go → file the Articles of Organization. Clean search + a real delay → reserve the name for $25–$40.
The Name Reservation: When It's Worth It
South Dakota’s LLC name reservation lasts 120 days with a $25 base fee; the current $15 paper-processing layer makes a paper submission $40. The same applicant cannot reserve the same name again until more than 60 days after expiration. Search results and this formatting checker are preliminary; SOS determines acceptance and trademarks require separate review.
Compare the optional 120-day hold with your actual formation schedule. Check current filing instructions and queue; no one-day approval is guaranteed. Keep state-name and trademark/domain checks separate.
- ✓Optional formation assistance; confirm filing scope, service pricing and submission responsibilities.
- ✓Optional formation assistance; confirm filing scope, service pricing and submission responsibilities.
- ✓Confirm registered-agent eligibility, coverage, included periods and renewal charges.
- ✓Review address-use rules and privacy policies; a service does not remove all information from public filings.
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Reservation duration and repeat-application limit
South Dakota’s LLC name reservation lasts 120 days with a $25 base fee; the current $15 paper-processing layer makes a paper submission $40. The same applicant cannot reserve the same name again until more than 60 days after expiration. Search results and this formatting checker are preliminary; SOS determines acceptance and trademarks require separate review.
South Dakota LLC — FAQ
Ahmad Adil is the founder and CEO of LLC School. For filing and ongoing compliance, confirm the requirements with the responsible state agency. This is educational information, not legal or tax advice.
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