LLC guide · Idaho

How to start an LLC in Idaho

File the Certificate of Organization with the Idaho filing office ($100 in state fees), name a registered agent, sign an operating agreement and get your EIN. Here's every step, what it costs and what Idaho expects each year.

Updated 6 min read6 steps

Why form an LLC in Idaho

A limited liability company keeps your personal assets, like your home and savings, separate from the business's debts and lawsuits. By default it's taxed like a sole proprietorship or partnership, so profits pass through to your personal return, and it has far fewer formalities than a corporation: no board, no required annual meetings and no stock.

In Idaho, you form an LLC by filing the Certificate of Organization with the Idaho Secretary of State, Business Services. The state fee is $100, and the LLC files the Annual Report every year after that.

An LLC fits most small businesses, freelancers and side projects. If you plan to raise venture capital or issue stock to employees, a C corporation in Idaho is usually the better fit.

What you'll need before you file

  • a business name, plus two or three backups in case your first choice is taken
  • a registered agent with a physical Idaho street address
  • the LLC's principal business address and a mailing address
  • the names and addresses of the members (owners), and of any managers
  • whether the LLC will be member-managed or manager-managed
  • a payment method for the $100 in state fees
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Step 1

Choose your LLC name

Your name must be distinguishable from every business already on file with the Idaho Secretary of State, Business Services. Search the state's business records before you settle on one; the Idaho filing office's website is the place to start.

The name also needs an LLC ending. "Limited Liability Company," "LLC" and "L.L.C." are the usual choices, but Idaho sets its own list, so confirm it before you file. Words that suggest a regulated business, such as "Bank," "Insurance" or "University," generally need approval or a license.

Check that the matching domain is free and search the USPTO trademark database so your name won't collide with a registered mark. Our guide to choosing a business name covers the details. If you'll operate under a different brand, you can register a DBA after the LLC is formed (what a DBA is).

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Step 2

Appoint a registered agent in Idaho

Every Idaho LLC must name a registered agent: a person or company with a physical street address in Idaho that accepts lawsuits and official state mail for the LLC during business hours. A P.O. box doesn't qualify.

You can serve as your own agent if you have a Idaho street address and are reliably there during business hours. Many owners use a commercial agent instead, which keeps a home address off the public record and makes sure nothing time-sensitive is missed. EZ Entity Setup can serve as your registered agent, and it's included with the Advanced and Premium plans.

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Step 3

File the Certificate of Organization

Submit the Certificate of Organization to the Idaho Secretary of State, Business Services. The state filing fee is $100. Filed online through SOSBiz. Paper filings add a $20 manual processing fee ($120 total).

The filing generally lists the LLC's name, its registered agent and address, its principal address, and whether members or managers run it. Once Idaho approves it, your LLC legally exists. Keep the approved copy with your records; banks ask for it.

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Step 4

Create an operating agreement

An operating agreement is the LLC's internal contract. It sets who owns what, how decisions get made, how profits are split and what happens if a member leaves or dies. It isn't filed with Idaho, but it's worth having even for a single-member LLC: it supports your liability protection and banks often ask for it.

A good agreement covers ownership percentages and capital contributions, voting and management, how profits and losses are allocated and distributed, and how a member can join, leave or sell. Our article on LLC operating agreements walks through each clause.

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Step 5

Get an EIN from the IRS

An Employer Identification Number is your LLC's federal tax ID. You need one to open a business bank account, hire employees and, for multi-member LLCs, file the partnership return. The IRS issues it for free, and an online application gets you the number right away. Read what an EIN is and how to get one.

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Step 6

Register for Idaho taxes, licenses and a bank account

Depending on what you sell and whether you hire, you may need to:

  • register for sales tax if you sell taxable goods or services (see our sales tax license guide)
  • register for state payroll withholding and unemployment insurance before your first payroll
  • get city or county business licenses, plus any professional or industry licenses your work requires
  • open a business bank account so the LLC's money stays separate from yours (how to open one)

Our checklist for your first 30 days after forming an LLC puts these in order.

How a Idaho LLC is taxed

By default, the IRS treats a single-member LLC as a "disregarded entity," so profit is reported on your personal return, and a multi-member LLC as a partnership, which files Form 1065 and issues each member a Schedule K-1. Either way, active owners pay self-employment tax on their share of profit.

What to know about Idaho:

  • Partnerships and S corporations may elect each year to pay Idaho income tax at the entity level as an affected business entity (ABE).

An LLC can also elect to be taxed as an S corporation, which can lower self-employment tax once profits are high enough. See the Idaho S corporation guide and our article on when an S corp election makes sense.

Keep your Idaho LLC in good standing

Idaho requires the Annual Report every year.

  • When it's due: By the last day of the month in which the LLC was formed, each year beginning one year after formation.
  • State fee: $0

Also keep a registered agent on file, keep business money in its own account, and update the state when your address, agent or managers change. Missing a report or fee can lead Idaho to dissolve the LLC, which puts your liability protection at risk. Our guide to annual reports and franchise taxes explains the deadlines, and Worry-free compliance files the reports for you.

What it costs to form an LLC in Idaho

CostAmountNotes
Certificate of Organization$100Filed online through SOSBiz. Paper filings add a $20 manual processing fee ($120 total)
Annual ReportNo fee, a yearBy the last day of the month in which the LLC was formed, each year beginning one year after formation
Registered agent$0 if you serve as your ownEZ Entity Setup's service is included with Advanced and Premium, or $99 on Starter (then $199 a year)
Operating agreement$0 to write your ownDrafted for you with Advanced and Premium
EIN$0Free from the IRS
Local business licensesVariesSet by your city, county and industry

State fees change from time to time. When you order through EZ Entity Setup, you see the exact state fee before you pay. For a state-by-state breakdown, read how much it costs to start an LLC.

Idaho LLC questions

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

Idaho charges $100 to file the Certificate of Organization. Filed online through SOSBiz. Paper filings add a $20 manual processing fee ($120 total). After that, you'll file the Annual Report every year (no fee).

What do I file to form an LLC in Idaho?

You file the Certificate of Organization with the Idaho Secretary of State, Business Services.

Does Idaho require an annual report for LLCs?

Yes. Annual Report, filed every year (no fee). Due: By the last day of the month in which the LLC was formed, each year beginning one year after formation.

Do I need a registered agent for a Idaho LLC?

Yes. Every Idaho LLC must keep a registered agent with a physical Idaho street address who is available during business hours. You can serve yourself if you meet those requirements, or use a registered agent service.

How is an LLC taxed in Idaho?

By default, the IRS taxes a single-member LLC like a sole proprietorship and a multi-member LLC like a partnership, so profits pass through to the owners' personal returns. In Idaho: Partnerships and S corporations may elect each year to pay Idaho income tax at the entity level as an affected business entity (ABE).

Can a Idaho LLC be taxed as an S corporation?

Yes. Once it has an EIN, an eligible LLC can file IRS Form 2553. Idaho accepts the federal S election. The corporation includes a copy of the IRS approval or federal Form 2553 with its first Idaho Form 41S.

Do I need an operating agreement?

Even where the state doesn't require one, an operating agreement is worth having. It sets ownership, voting and profit sharing, and banks often ask for it when you open an account.

Official Idaho sources

We checked the fees and requirements in this guide against these official sources on October 19, 2026. States change fees and forms, so confirm with the Idaho Secretary of State, Business Services before you file on your own.

This guide is general information, not legal or tax advice. For advice about your situation, talk to a licensed attorney or CPA.

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