Idaho LLC name search

What an Idaho LLC name must include

Idaho accepts these endings for a limited liability company:

• Limited Liability Company
• Limited Company
• L.L.C.
• LLC
• L.C.
• LC

The statute that governs names, Idaho Code § 30-21-302, lets a professional LLC add “professional” or “P” to its ending, and within the endings “Ltd.” may stand in for “Limited” and “Co.” for “Company”. No restricted-word list could be confirmed on an official Idaho page.

How Idaho decides two names are the same

When the Secretary of State checks an LLC name, the ending drops out: “LLC”, “L.L.C.” and “limited liability company” don't count (Idaho Code § 30-21-302). Its FAQ gives the example of an assumed name “XYZ”, which needs the consent of an existing “XYZ, LLC”. Whatever remains must be distinguishable from the names of existing entities on the state's records. That means “Blue Fox LLC” and “Blue Fox Limited Liability Company” are the same name to Idaho, and changing the ending won't get a taken name through.

Where the rules are written. Idaho Code § 30-21-302 (Idaho Uniform Business Organizations Code, permitted names); Title 30, Chapter 25 (LLCs).

Searching for an LLC name in Idaho

SOSBiz is the Secretary of State's online system, and its search is free. It covers the state's trademark records as well as businesses, so one search shows both.

Open the official Idaho entity search

Leave the ending off when you search, so every version of the name shows up, then compare each result word by word. If one matches apart from spacing, punctuation or a plural, change a real word in your name.

Live from Idaho's records. Pick Idaho in the LLC name check and it runs your words through the Idaho Secretary of State's Business Search when you submit, then lists the registered names that share them, longer ones that open with them, and those starting with the same two words.

Holding the name: Idaho LLC name reservation

Four months is how long an Idaho reservation lasts. Filing online through SOSBiz costs $20; the paper Application for Reservation of Legal Entity Name costs $40 because of a $20 manual processing fee.

File an Idaho name reservation

Forming the LLC in Idaho

The Certificate of Organization creates the LLC: $100 when filed through SOSBiz, $120 on paper.

File the Certificate of Organization online

Idaho LLCs file an annual report every year, starting the year after formation, by the end of the month in which they were formed (Idaho Code § 30-21-213). Official pages, read through search results, show no filing fee for it. There's no franchise tax and no newspaper notice. A Certificate of Existence, Idaho's proof of good standing, is listed at $10; request it online through SOSBiz or order it from the Secretary of State's office.

When the LLC trades under another name

To do business under another name, an Idaho LLC files a Certificate of Assumed Business Name with the Secretary of State: $25 online, $45 on paper. A later amendment costs $10.

Sources

• Business forms, sos.idaho.gov, checked 2026-10-07
• Business faq, sos.idaho.gov, checked 2026-10-07
• Sect30 21 302, legislature.idaho.gov, checked 2026-10-07
• Sect30 21 213, legislature.idaho.gov, checked 2026-10-07
• Business resources, sos.idaho.gov, checked 2026-10-07
• Annual report help, sos.idaho.gov, checked 2026-10-07

These are the official pages behind every fact above. If one of them now says something different, it's right and this page is out of date.

A few were read from search results, not the page itself, because the site refused direct requests; treat the facts they back as provisional until the Idaho Secretary of State confirms them.