How to Look Up an LLC in Idaho (2026)
To look up an LLC in Idaho, use the Business Search tool on SOSBiz. That's the Secretary of State's own filing and records system. Search by entity name or file number. You'll see the entity's filing status, registered agent and history right away, and it's free.
SOSBiz also runs a separate trademark search. It can confirm whether a company you're about to sign with is still active and in good standing. This guide covers every search method. You'll learn what a result shows and who to call when the tool can't answer your question.
Quick Summary
- Two search paths work: entity name or the state file number, plus a registered-agent filter.
- Small businesses make up 99.2% of Idaho's businesses, per the SBA [1]. Check the name first.
- Call or email the Business Services Division when the search tool doesn't answer your question.
| Search Method | What to Enter | Best For |
|---|---|---|
| By business name | The company name, minus "LLC" or "Inc." (filter further by registered agent or active-only) | General lookups when you only know the name |
| By file number | The Secretary of State's assigned file number | An exact match when you already have the number |
How to Search for an LLC in Idaho
Idaho's business records live inside SOSBiz, the Secretary of State's combined filing and search platform. Every method below starts from that same tool.
1. Search by Business Name
Type the name you're checking into the search bar and drop identifiers like "LLC" or "Inc." before you hit search. Capitalization doesn't matter, and the tool pulls up entities with a matching or similar name. If the name runs long, search just the first two words instead of the full phrase.
An advanced filter narrows results further. You can match names that start with your term, or names that just contain it. You can also narrow by a specific registered agent, or active entities only.
2. Search by File Number
If you already have the entity's file number, enter it directly for an exact match. This route skips the name-guessing step. You already have the number in hand.
Each result shows the company's form type, filing status, formation date and registered agent. That's true whether you searched by name or by file number.
Contact the Business Services Division
For anything the search tool can't answer, the Business Services Division takes calls and emails. Reach them during posted business hours below:
- Phone: (208) 334-2301
- Email: business@sos.idaho.gov
- Hours: Monday through Friday, 8:00 a.m. to 5:00 p.m.
Call when you want to talk through which search field will surface the record you're after. Email works better for anything detailed. Include the file number and a clear description of your question. That extra detail gets you a useful answer faster.
Check for Idaho Trademark Conflicts
A clear name at the state level doesn't rule out a federal trademark problem. Run both searches before you commit to a name.
Search the USPTO database by keyword, product category or owner name. That checks for federal marks, the kind a state-only search can't catch.
Then search Idaho's own trademark records inside SOSBiz. Those cover only marks registered directly with the state. Running both takes about ten minutes and can save you a legal headache down the road.
Reasons to Run an Idaho LLC Search
A search confirms name availability before you start an LLC in Idaho. It also answers a few other questions worth checking first:
- Confirm the entity type: see whether a company is an LLC, a corporation or something else before you assume.
- Pull registered agent details: useful if you're evaluating Idaho's best registered agent services or need to reach an agent.
- Confirm a business is real and active: a search shows if the entity still exists before you sign or partner.
- Research the competition: knowing what's already registered in your space helps you think through positioning before launch.
For a company registered outside Idaho, our guide to looking up an LLC covers the same process state by state.
What Shows Up in an Idaho LLC Search Result
Each record in SOSBiz shows the entity's filing status, formation date and registered agent. You'll also see its principal and mailing addresses, plus the annual report due date. A full filing history is included too, with any amendments or agent changes.
You can also request a Certificate of Existence straight from the record page for a $10 fee. Idaho doesn't require this certificate to do business in the state. Treat any third-party mailer that claims otherwise as a sales pitch.
One limit worth knowing: the search tool doesn't display ownership details or EINs. For ownership information, contact the registered agent directly or dig into the LLC's publicly filed documents instead.
FAQs
Does Searching Idaho's Business Records Cost Anything?
No. Searching Idaho's business records by name or file number costs nothing online. Fees only kick in if you later request a certificate or a certified copy.
Can I Reserve a Business Name Before I File?
Yes. You can reserve a business name before you file by submitting the Application for Reservation of Legal Entity Name, which locks in your name for four months. It costs $20 online or $40 by mail.
Who Actually Asks for a Certificate of Existence?
A Certificate of Existence is usually requested by banks, lenders and out-of-state agencies rather than the state. A bank may want one before opening a business account, and another state may want one before you register your Idaho LLC there.
Does an Idaho LLC Need a Business License to Operate?
No. Idaho doesn't require one single statewide business license. You may still need specific tax permits or local licenses, which the state's own Business Wizard tool can help you identify.
References:
- https://advocacy.sba.gov/wp-content/uploads/2025/06/Idaho_2025-State-Profile.pdf
Can I use your operating agreement without making any changes?
Luckily i checked my LLC name before sending to the SOS as it was taken