How to form an LLC in Idaho

Idaho is among the cheapest states to keep an LLC: the annual report is free. The catch is that it is still mandatory, and easy to forget precisely because it costs nothing. This guide covers the filing and the yearly report.

By Mirza Fahad Baig, Chartered Accountant. Reviewed by Muhammad Bilal, Chartered Accountant. Checked against official sources on . 3 minute read.

Short answer

To form an LLC in Idaho, file a Certificate of Organization with the Idaho Secretary of State through SOSBiz and pay $100, or $120 on paper. Each year, file a free annual report by the end of the month in which the LLC was formed, starting the year after formation. Missing it can lead to administrative dissolution.

At a glance

State filing fee
$100 online, $120 on paper
Filed with
Idaho Secretary of State, SOSBiz
Annual report
Free
Due
End of the formation anniversary month
First report
The year after formation
Registered agent
Required, Idaho street address
How to form an LLC in IdahoState filing fee: $100 online, $120 on paper; Filed with: Idaho Secretary of State, SOSBiz; Annual report: Free; Due: End of the formation anniversary month; First report: The year after formation; Registered agent: Required, Idaho street address.KEY FACTS AT A GLANCEHow to form an LLC in IdahoState filing fee$100 online, $120 onpaperFiled withIdaho Secretary of State,SOSBizAnnual reportFreeDueEnd of the formationanniversary monthFirst reportThe year after formationRegistered agentRequired, Idaho streetaddressChecked against official sourcesTax BakersHow to form an LLC in IdahoState filing fee: $100 online, $120 on paper; Filed with: Idaho Secretary of State, SOSBiz; Annual report: Free; Due: End of the formation anniversary month; First report: The year after formation; Registered agent: Required, Idaho street address.KEY FACTS AT A GLANCEHow to form an LLC in IdahoState filing fee$100 online, $120 on paperFiled withIdaho Secretary of State, SOSBizAnnual reportFreeDueEnd of the formation anniversary monthFirst reportThe year after formationRegistered agentRequired, Idaho street addressChecked against official sourcesTax Bakers
Key facts at a glance, as set out in this guide.

Who should form an LLC in Idaho?

Anyone who lives in Idaho or runs their business from there. If you form in another state but operate in Idaho, you will usually have to register there as a foreign LLC anyway, paying both states' fees. See home state or another state.

How do you form an LLC in Idaho, step by step?

  1. Choose and check the name

    Search the state's business records and include "LLC", "L.L.C." or "Limited Liability Company" in the name.

  2. Appoint a registered agent

    A person or company with a physical street address in Idaho. See what a registered agent is.

  3. File the Certificate of Organization

    Online through SOSBiz for $100, or on paper for $120, which includes a $20 manual processing fee.

  4. Get an EIN and sign an operating agreement

    The EIN is free from the IRS. See LLC operating agreement.

  5. Register for state taxes

    Sales tax and payroll as needed. Then note the first yearly filing date.

What does Idaho require every year?

An annual report each year, with no fee when filed online, due by the last day of the month in which the LLC was formed, starting in the year after formation. It confirms the LLC's addresses, registered agent and governors. An LLC that does not file within the grace period after the due date can lose good standing and be administratively dissolved.

For deadlines, fees and late penalties in detail, see Idaho LLC yearly filings.

What does the first year cost?

ItemCost
Certificate of Organization$100 online
Name reservation, optionalA small fee
Annual reportFree, from the following year

With no annual fee, the main ongoing cost is a registered agent if you use a commercial one.

Should you file it yourself or use a formation service?

Filing yourself costs only the state fee, and the Idaho filing is short enough for most owners to complete. A formation service saves time, can act as your registered agent and may send reminders for yearly filings, but compare total yearly costs: low headline prices are often paired with paid add-ons such as expedited filing, operating agreements or EIN applications, which you can do yourself free. Whichever you choose, keep the approved filing, the EIN letter and your operating agreement together. See how much an LLC costs.

Can a non-resident form an LLC in Idaho?

Yes. Idaho has no residency or citizenship requirement for an LLC's members or managers. You need a registered agent with a Idaho street address and an EIN; a foreign owner without a Social Security number applies for the EIN on Form SS-4. A single-member LLC owned by a foreign person files Form 5472 with a pro forma Form 1120 every year, even with no US income. See can a non-resident own a US LLC and annual filings for foreign-owned LLCs.

What happens if you miss a required report?

The state usually charges a late fee and marks the LLC as not in good standing, which can block a certificate of good standing, a bank account or a loan. If the filing stays overdue, the state can administratively dissolve the LLC, ending its liability protection and its claim to the name. Reinstatement means filing every missing report and paying the fees owed, so put the dates in your calendar. See reinstating a dissolved LLC.

Which Idaho taxes apply to an LLC?

Idaho has a flat personal income tax on owners' shares of profit and a 6% state sales tax, with some local sales taxes in resort areas. Register with the Idaho State Tax Commission if you sell taxable goods or have employees.

If you sell online, see Idaho sales tax for online sellers.

Federally, a Idaho LLC is taxed like any other LLC. See how LLCs are taxed. For a side-by-side view of state costs, see how much an LLC costs.

Want your Idaho LLC formed?

We file your Certificate of Organization, arrange the registered agent and EIN, and keep track of every Idaho deadline for you.

Questions people ask

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

$100 online through SOSBiz, or $120 on paper.

Is the Idaho annual report free?

Yes, when filed online, but it is mandatory.

When is the Idaho LLC annual report due?

By the end of the month the LLC was formed, each year from the year after formation.

What happens if I miss the Idaho annual report?

The LLC can lose good standing and eventually be administratively dissolved.

Sources

Every fee, date and rule on this page was taken from these official and primary sources.

  1. Idaho Secretary of State: Business forms
  2. Idaho State Tax Commission
  3. IRS: Get an employer identification number
  4. IRS: Employer identification number, including international applicants

Rules and fees change. If you are reading this long after October 1, 2026, confirm the figures with the source before you rely on them.

More in State LLC formation

This guide is general information. It is not tax or legal advice for your situation.