Idaho Secretary of State business search — LLC name check, trademark & domain lookup
Idaho charges nothing for its annual report, one of only a handful of states where keeping an entity alive costs $0 a year after formation. The registry is on the same platform as North Dakota's, and its search reads 'distinguishable' fairly strictly — a name that differs from an existing one only by punctuation or a suffix will not be accepted.
Check an Idaho business name now — Enter the exact name you're considering — it's searched against state registry records, federal trademark filings, and domain registrars. Free, no signup to start.
Check this name →How to check a business name in Idaho
- Type the exact name, suffix included. The checker runs it against the Idaho registry, the federal trademark register and domain registrars in one pass.
- Read the close matches, not just the verdict. Idaho refuses names that aren't distinguishable — a near-miss on the list is the one that will block you.
- Reserve or file while it's clear. Idaho will hold it for 120 days for $20. Confirm at the official Idaho Secretary of State search first.
How busy is Idaho right now?
The U.S. Census Bureau counted 37,149 business applications from Idaho in the twelve months ending August 2026 — +16.0% on the year before, the 39th-highest total of any state and 18.6 per 1,000 residents (ranked 16th per person). April was the busiest month with 4,142 applications, and Idaho accounts for 0.6% of all U.S. filings.
Each application is a competitor for the same short, natural-sounding names, so the more active the state, the less a week-old search result is worth.
Where America starts businesses — all 50 states ranked →
Source: U.S. Census Bureau, Business Formation Statistics (monthly, not seasonally adjusted). 2019 comparison: 21,612 applications in calendar 2019.
Idaho naming rules: what the Idaho Secretary of State will and won't accept
Every Idaho filing is screened for a single thing before anything else: the name must be distinguishable on the records of the Secretary of State. The examiner ignores punctuation, spacing, capitalization and the suffix when comparing, so two names that look different on paper can still collide. An LLC name must end in LLC, L.L.C., Limited Liability Company and Limited Company; a corporation uses Corporation, Corp., Incorporated and Inc., among others.
A few words are gated. In Idaho that list includes Bank, Trust, Insurance, Engineer and Engineering — using one implies a regulated activity and the filing will be held until the relevant regulator consents.
On cost: forming an LLC costs $100, a corporation $100 and a name reservation is $20 and holds the name for 120 days. Sosbiz online filings usually same day to 3 business days.
After you file: Annual report, no fee, due by the end of the anniversary month. An entity that stops filing loses good standing, and with it the exclusive claim to its name.
As published by the Idaho Secretary of State, (208) 334-2301 — official website (fee schedule). Fees change; confirm before filing.
How Idaho decides whether a name is taken
Three things the Idaho Secretary of State looks at, and one it doesn't:
- Status. Only entities in an active status hold their names. Dissolved, revoked and withdrawn registrations release the name — with the caveat that a very recent lapse can still be reinstated, which our result notes when it applies.
- Distinguishability. Your name must differ from every active Idaho name by more than punctuation, spacing, capitalisation or the entity designator. Two names that read the same aloud are usually treated as the same name.
- Designator. The recorded name of an LLC ends in an LLC designator and a corporation's in Inc., Corp. or an accepted equivalent; leave it off and the filing is returned.
- Not trademarks. The registry never checks the USPTO. A name can be free in Idaho and still infringe a federal mark, so run both — the checker on this page does.
About the Idaho Secretary of State
The Idaho Secretary of State maintains Idaho's registry of corporations, LLCs, and other registered entities — it is the system of record for Idaho business names. Useful official resources:
- Official Idaho business entity search — the state's own lookup.
- Idaho Secretary of State — official website — filings, forms, fees, and contact details.
Before you file in Idaho: a two-minute double check
- Run the name through the checker above — registry, USPTO and domain in one pass.
- Repeat the search on the official Idaho lookup, spelling the name exactly as it will be filed, with the designator.
- For every match returned, note the status. Active blocks; dissolved or revoked usually doesn't; a recent lapse deserves a second look.
- Compare spellings, not just exact hits — Idaho treats near-identical names as the same name.
- Clear on both? Reserve or file straight away. Names are first-come, first-served.
Frequently asked questions
- Can I reserve a business name in Idaho before I file?
- Yes. The Idaho Secretary of State charges $20 to reserve a name for 120 days. A reserved name shows as taken to everyone else's search.
- How much does it cost to register a business name in Idaho?
- The name itself is free to search. Filing the entity is what costs money: $100 for an LLC and $100 for a corporation, then annual report, no fee, due by the end of the anniversary month.
- Are there words I can't use in an Idaho business name?
- Words that imply a regulated business need consent first. In Idaho that includes Bank, Trust, Insurance, Engineer and Engineering. Names that suggest a government agency are refused outright.
- How many new businesses start in Idaho each year?
- The Census Bureau counted 37,149 business applications in the twelve months to August 2026, +16.0% on the year before. Not every application becomes a registered entity, but each one is a name someone intends to use.
- Does an Idaho registration protect my name in other states?
- No. It protects the name inside Idaho's registry only. Nationwide protection comes from a federal trademark, which is why the checker runs the USPTO search alongside the Idaho lookup.
- What does an Idaho LLC name have to end with?
- One of the state's accepted designators — LLC, L.L.C., Limited Liability Company and Limited Company. The checker searches the name with and without the suffix, because the suffix alone never makes a name distinguishable.
Still choosing a name? Try the Idaho business name generator — every idea checked against the same registry.
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