How to Form an LLC in Idaho: Steps & Cost (2026)

Fact-checked by the LegalGlass editorial team against primary sources · Published Aug 6, 2026 · Last updated Aug 6, 2026

You form an Idaho LLC by filing a Certificate of Organization with the Idaho Secretary of State and paying the $100 online filing fee through SOSBiz (or $120 for a paper filing). You must appoint an Idaho registered agent, and every year you file a free annual report to stay in good standing.

Quick Answer

Form: Certificate of Organization (Limited Liability Company)
Filing fee: $100 online (SOSBiz) / $120 paper (2026)
Agency: Idaho Secretary of State - file online via SOSBiz
Registered agent: Required - physical Idaho street address, must consent
Ongoing: Annual report - free - due by end of anniversary month
State income tax: Yes - Idaho State Tax Commission (no LLC franchise tax)

Idaho Agency and Form: Secretary of State, Certificate of Organization

An Idaho LLC is created by filing a Certificate of Organization with the Idaho Secretary of State. This is the form the Secretary of State provides specifically for a limited liability company, and the agency's acceptance of it is the legal act that brings the LLC into existence under the Idaho Uniform Limited Liability Company Act (Idaho Code Title 30, Chapter 25). The document asks for the LLC's name, its principal office, the name and Idaho address of the registered agent, whether the company is member-managed or manager-managed, the governors (members or managers), and the organizer.

The name must contain an LLC designator - such as "LLC," "L.L.C.," or "Limited Liability Company" - and must be distinguishable in the records of the Secretary of State from names already in use. You search existing names and file through SOSBiz, the Secretary of State's online business portal, which is both the fastest and cheapest route; paper filing by mail or in person is also accepted for a higher fee. This guide covers the Idaho-specific process; for the national overview, see how to form an LLC and the shared concept of the articles of organization that most states use.

How to Form an Idaho LLC, Step by Step

Forming an Idaho LLC is a five-step process centered on the Certificate of Organization. Each step corresponds to a requirement of the Idaho Uniform Limited Liability Company Act or a federal tax rule.

Choose and check your LLC name. Select a name that includes an LLC designator and is distinguishable from names already on file. Verify availability in the SOSBiz business search. If you are not ready to file, you may reserve a name for four months. Confirm the name also does not infringe a federal trademark.
Appoint an Idaho registered agent. Every Idaho LLC must designate a registered agent with a physical Idaho street address. The agent - an Idaho resident or a qualified entity - must consent to the appointment before being named on the certificate.
File the Certificate of Organization. Submit the certificate to the Idaho Secretary of State and pay the $100 online fee through SOSBiz, or $120 for a paper filing (the extra $20 is a manual-processing charge). Once the Secretary of State accepts it, your LLC legally exists.
Adopt an operating agreement. Idaho does not require you to file an operating agreement, but one is strongly recommended to set ownership percentages, management structure, voting, and profit distribution. See Idaho operating agreements and the national operating agreement guide for what to include.
Get an EIN and register for Idaho taxes. Apply for a free federal EIN from the IRS, then register with the Idaho State Tax Commission for a seller's permit and, if you have employees, income tax withholding.

After these steps, open a business bank account (banks generally ask for the stamped Certificate of Organization and the EIN) and keep your registered agent and annual report current every year.

Idaho LLC Filing Fees (2026)

The core cost of an Idaho LLC is the $100 online Certificate of Organization fee. The table below lists the state fees most new LLCs encounter, each verified against the Idaho Secretary of State forms or the Idaho State Tax Commission. Amounts are effective for 2026 and are set by the state, not by any filing service. For a full breakdown, see how much an Idaho LLC costs.

Item	Method	Fee (2026)	Agency
Certificate of Organization (create the LLC)	Online (SOSBiz)	$100	Secretary of State
Certificate of Organization (paper)	Mail / in person	$120	Secretary of State
Expedited processing	Add-on	+$40	Secretary of State
Annual report	Online (SOSBiz)	$0 (no fee)	Secretary of State
Idaho seller's permit	Taxpayer Access Point (TAP)	$0 (free)	State Tax Commission
Federal EIN	IRS Form SS-4	$0 (free)	IRS

Expedited processing is available for an added fee if you need faster handling. Because name-reservation, change-of-agent, and copy fees can change, confirm the current amount on the Secretary of State's fee schedule before you file.

Idaho Registered Agent Requirement

An Idaho registered agent is the person or entity your LLC designates to receive service of process, tax notices, and official state correspondence. The Idaho Uniform Limited Liability Company Act requires every domestic LLC to designate and continuously maintain a registered agent and a registered office in Idaho. You name the initial agent directly on the Certificate of Organization.

The agent must be either an individual who resides in Idaho, or a domestic or qualified foreign entity authorized to do business in Idaho, and must have a physical Idaho street address - a post office box alone does not satisfy the requirement. The person or entity named must have consented to serve. You may act as your own registered agent, name a member or manager, or hire a commercial registered agent service. To change agents later, you file a statement of change of registered agent with the Secretary of State; confirm the current fee on the SOS fee schedule. Failing to maintain a registered agent is a ground for administrative dissolution. See Idaho registered agent requirements and the national registered agent overview for detail.

Idaho Annual Report

Idaho requires every LLC to file an annual report with the Secretary of State to confirm the company's current name, principal address, registered agent, and management. Unlike many states, Idaho charges no fee for the annual report. The report is due by the last day of the anniversary month in which the LLC was originally organized - for example, an LLC organized on March 12 files by March 31 each year.

The Secretary of State sends a courtesy reminder, and you file the report online through SOSBiz in a few minutes. If you miss the deadline, the state can administratively dissolve the LLC after notice, which strips the company of its good standing and its ability to conduct business under its name. Reinstatement is possible but requires filing the delinquent report and any reinstatement paperwork the Secretary of State requires. For the full schedule and reinstatement steps, see the Idaho annual report guide.

Idaho State Taxes for LLCs

Idaho does not impose a separate LLC franchise tax. Instead, an LLC's income flows through to how the IRS classifies it: by default, a single-member LLC is a disregarded entity taxed on the owner's return, and a multi-member LLC is a partnership. That income is then subject to Idaho income tax, administered by the Idaho State Tax Commission. An LLC that elects to be taxed as a corporation (including an S-corporation) files the corresponding Idaho return instead.

If your LLC sells taxable goods or certain services in Idaho, you must register for a seller's permit and collect Idaho sales and use tax; the permit is free and you apply through the Taxpayer Access Point (TAP). Idaho also imposes withholding obligations if you have employees. Idaho's state income tax and sales tax rates are set by statute and can change, so confirm current rates with the Tax Commission rather than relying on a figure quoted elsewhere. For the mechanics of pass-through and corporate filing, see Idaho LLC tax filing and the national business tax hub.

EIN, Seller's Permit, and Licenses

A federal Employer Identification Number (EIN) is issued free by the IRS and is used to open a bank account, hire employees, and file taxes. Most Idaho LLCs need an EIN, and one is required if the LLC has more than one member or any employees. A single-member LLC with no employees can sometimes use the owner's Social Security number, but an EIN is still recommended to keep business and personal finances separate - see whether you need an EIN for a bank account.

Idaho has no general statewide business license, but many cities, counties, and regulated professions require their own permits or licenses, and any business making retail sales needs the seller's permit described above. Check the requirements for your specific activity and location before you open. See business licenses in Idaho and the national business license overview for details, plus assumed business names (DBAs) if you will operate under a name other than the LLC's legal name.

Penalties for Missing Idaho Requirements

Missing Idaho requirements carries real consequences. If an LLC fails to file its annual report, the Secretary of State may administratively dissolve the entity after notice - the company loses its good standing and the exclusive right to its name, and continuing to do business as a dissolved LLC can expose members to personal liability. Reinstatement generally requires filing the delinquent report and correcting the problem.

Separately, if the LLC does not maintain a registered agent and registered office, that too is a ground for administrative dissolution. On the tax side, failing to file Idaho income tax returns or collect and remit sales tax can trigger penalties and interest from the Idaho State Tax Commission. Keeping your registered agent, annual report, and tax accounts current is the simplest way to avoid all of these outcomes.

Closing an Idaho LLC

To close an Idaho LLC properly, you wind up the business, settle debts, file final federal and Idaho tax returns, and file the dissolution paperwork required by the Idaho Uniform Limited Liability Company Act with the Secretary of State. Simply abandoning the LLC leaves the annual report obligation running and can lead to administrative dissolution on the state's terms instead of yours. See how to dissolve an LLC in Idaho for the full wind-up and termination steps, and the national dissolution hub.

Frequently Asked Questions

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

The Certificate of Organization costs $100 to file online through SOSBiz, or $120 for a paper filing by mail or in person. The annual report is free, and a federal EIN and Idaho seller's permit are also free. See Idaho LLC cost.

What document creates an Idaho LLC?

A Certificate of Organization (Limited Liability Company), filed with the Idaho Secretary of State. Filing online through SOSBiz is the fastest and cheapest method at $100.

Does an Idaho LLC need a registered agent?

Yes. Every Idaho LLC must continuously maintain a registered agent with a physical Idaho street address who has consented to serve. You name the agent on the Certificate of Organization.

Does Idaho charge an annual report fee?

No. Idaho requires an annual report every year, due by the last day of the LLC's anniversary month, but there is no filing fee. Missing it can lead to administrative dissolution.

How is an Idaho LLC taxed?

By default the IRS treats a single-member LLC as a disregarded entity and a multi-member LLC as a partnership, with income passing through to the owners and taxed under Idaho's income tax. There is no separate Idaho LLC franchise tax.

When is the Idaho annual report due?

By the end of the month in which the LLC was originally organized, every year. You file it free through SOSBiz, and the Secretary of State sends a reminder.

How to form an LLC (cluster hub)
Idaho registered agent requirements
How much does an Idaho LLC cost?
Idaho annual report
Idaho LLC tax filing
How to get an EIN
How to dissolve an LLC in Idaho
How to form an LLC in Texas (sibling)

Sources

Idaho Secretary of State - Certificate of Organization, Limited Liability Company (PDF form) (name, registered agent, management).
Idaho Secretary of State - SOSBiz online business filing portal.
Idaho Legislature - Idaho Code Title 30, Chapter 25 (Idaho Uniform Limited Liability Company Act).
Idaho Legislature - Idaho Code Title 30, Chapter 21 (registered agents).
Justia - Idaho Code Title 30, Chapter 25 (LLC Act, annotated).
Justia - Idaho Code Title 30, Chapter 21 (registered agents, annotated).
Idaho State Tax Commission - Business Income Tax (pass-through and corporate filing).
Idaho State Tax Commission - Business Income Tax Filing and Paying.
Idaho State Tax Commission - Sales and Use Tax (seller's permit).
IRS - Limited Liability Company (LLC) (federal default classification).
IRS - Get an Employer Identification Number (free EIN).
IRS - Single Member Limited Liability Companies (disregarded-entity default).
IRS - About Form 2553, Election by a Small Business Corporation (S-corp election).
Cornell Legal Information Institute - Limited Liability Company (LLC) (Wex definition).

LegalGlass provides general information for educational purposes and is not a law firm or a substitute for advice from a licensed attorney or tax professional. Laws, fees, and thresholds change; verify current requirements with the Idaho Secretary of State and Idaho State Tax Commission before acting.