LLC Filing Guide

LLC Filing Guide › Idaho

How to file an LLC in Idaho (2026)

File the Certificate of Organization Limited Liability Company with the Idaho Secretary of State to create a Idaho LLC. The filing fee is $100. Annual report due by the end of the anniversary month; no fee online. Every Idaho LLC must keep a registered agent with an Idaho street address.

  • Official sources, checked October 20, 2026
  • Prices verified October 2026

How to form an LLC in Idaho

  1. Pick a name with “LLC” or “Limited Liability Company” in it, and check that it’s free on the Idaho Secretary of State business records.
  2. Name a registered agent: an Idaho resident, or a business entity authorized to do business in Idaho. An assumed business name (DBA) cannot serve.
  3. File the Certificate of Organization Limited Liability Company with the Idaho Secretary of State and pay $100.
  4. Get an EIN from the IRS. It is free and comes after the LLC is formed.
  5. Sign an operating agreement among the members. It sets ownership and voting rules and stays with your records.
  6. File the yearly report. Annual report due by the end of the anniversary month; no fee online.

Mainstay Filing takes care of the agent, the filing, the EIN application for $199 a year plus Idaho’s fees.

Idaho LLC fees and rules

State filing fee
$100
Formation document
Certificate of Organization Limited Liability Company
Yearly filing
Annual report due by the end of the anniversary month; no fee online.
Registered agent
Required. An Idaho resident, or a business entity authorized to do business in Idaho. An assumed business name (DBA) cannot serve.
Agent address
The address has to be a physical street address in Idaho. P.O. boxes and commercial mailboxes are not accepted.
Filing fee rank
17th lowest of 50 (16 states charge less, 24 charge more)

Idaho compared with neighboring states

StateFiling feeYearly filing
Idaho$100$0 report
Montana$35$20 / yr
Nevada$425$350 annual list
Oregon$100$100 / yr
Utah$59$18 / yr
Washington$200$70 / yr
Wyoming$100$60 / yr

All 50 states

Best overall for a Idaho LLC

Mainstay Filing

Our rating: 4.9 out of 5

$199 / year, all-in, plus state fees

$199 a year plus Idaho’s $100 filing fee, which is passed through at cost.

  • LLC formation, prepared and filed
  • Registered agent, all year
  • EIN application (with an SSN or ITIN)
  • Compliance reminders

The same $199 at renewal. Already have an LLC and only need an agent? Mainstay Filing’s registered agent service alone is $149 a year.

Prices verified October 21, 2026 on Mainstay Filing’s pricing and FAQ pages.

Idaho LLC questions

How much does it cost to start an LLC in Idaho?

$100 to the state to file. Annual report due by the end of the anniversary month; no fee online. With Mainstay Filing, the formation filing, registered agent and EIN application are $199 a year on top of the state fees.

Does Idaho require an annual report for LLCs?

Annual report due by the end of the anniversary month; no fee online.

Do I need a registered agent in Idaho?

Yes. An Idaho resident, or a business entity authorized to do business in Idaho. An assumed business name (DBA) cannot serve.

Can I form a Idaho LLC myself?

Yes. You can file the Certificate of Organization Limited Liability Company directly with the Idaho Secretary of State and pay the $100 fee. A service such as Mainstay Filing files it for you and adds the registered agent, EIN application and compliance reminders for $199 a year.

Other formation services

  • Northwest Registered Agent: $39 plus the state fee, with its registered agent service included the first year, then $125 a year; annual report filing is an extra $100 plus the state fee.
  • ZenBusiness: Starter package $0 plus the state fee; Pro is $199 a year with the EIN and annual-report filing, and its registered agent is a separate $199 a year that no package includes.
  • Bizee: Basic package $0 plus the state fee (Standard $199, Premium $299), with one free year of its registered agent, which is $149 a year after that.
  • LegalZoom: Basic package $0 plus the state fee (Pro $249, Premium $299); its registered agent is $249 a year for first-time agent customers.

Prices from each company’s own pages, checked October 20, 2026. Plus the state fee in every case.

Sources