Idaho LLC Name Search

Check if your business name is available in Idaho before you file, then see Idaho's LLC naming rules, fees and filing requirements

Idaho
Filing Fee
$100
Certificate of Organization
Annual Report
No fee
Due by the end of your LLC’s anniversary month each year, starting the year after you form it
Name Reservation
$20
Holds a name for 120 days

How Much Does an LLC Cost in Idaho?

Filing your Certificate of Organization in Idaho costs $100. There’s no fee for the annual report, which is due by the end of your LLC’s anniversary month each year, starting the year after you form it.

  • Certificate of Organization

    Filed online. Paper filings cost $120. Source →

    $100

  • Annual Report

    Due by the end of your LLC’s anniversary month each year, starting the year after you form it. Source →

    No fee

  • Name reservationOptional

    Holds a name for 120 days. Source →

    $20

  • Assumed business nameOptional

    Only if you do business under a name other than the LLC’s legal name. Source →

    $25

Checked against official Idaho sources on October 23, 2026. Fees change, so confirm with the state before you file.

LLC Requirements in Idaho

Formation Requirements

Basic Requirements

  • Operating Agreement (recommended)
  • Federal Tax ID (EIN)
  • Business Licenses (if applicable)

Registered Agent

Idaho requires all LLCs to maintain a registered agent in the state.

Processing Time

Idaho processes business filings in about 3–5 days, depending on volume.

Expedited service within 8 working hours costs $40, and same-day service costs $100 if you submit before 1:00 p.m. Mountain Time.

Source →

Contact the Idaho Business Filing Office

Search LLC Name isn’t a government website. For an official answer about a name or a filing, contact the state office directly.

Contact Details

Fax

208-334-2080

Address Information

Mailing Address

PO Box 83720, Boise, ID 83720-0080

Physical Address

450 N. 4th Street, Boise, ID 83720-0080

Official Idaho Resources

Idaho LLC Name Search FAQ

Enter the name in the search at the top of this page to bring up Idaho’s official business search right here. Search close variations too: Idaho law requires a new LLC name to be distinguishable on the records of the Secretary of State (Idaho Code § 30-21-301). A clear search is a good sign, but the state makes the final call when it reviews your filing.

It must include “Limited Liability Company” or an abbreviation such as “LLC” or “L.L.C.”. Idaho law requires a new LLC name to be distinguishable on the records of the Secretary of State (Idaho Code § 30-21-301). Words like Bank, Insurance or Trust usually need approval from another agency.

A Idaho name reservation costs $20 and holds the name for 120 days. Paper requests cost $40.

Filing your Certificate of Organization in Idaho costs $100. There’s no fee for the annual report, which is due by the end of your LLC’s anniversary month each year, starting the year after you form it.

Idaho processes business filings in about 3–5 days, depending on volume. Expedited service within 8 working hours costs $40, and same-day service costs $100 if you submit before 1:00 p.m. Mountain Time.

Yes, Idaho requires every LLC to keep a registered agent in the state who can receive legal documents for the business.

Idaho requires an annual report (no fee), due by the end of your LLC’s anniversary month each year, starting the year after you form it. You also need to keep a registered agent in the state.

To use a name other than your LLC’s legal name, file an assumed business name with the Secretary of State for $25 online ($45 on paper). It stays active until you cancel it.

LLC Name Search in Other States