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Idaho LLC · Complete Guide · Verified June 2026

How to Start an LLC in Idaho (2026)

Idaho is one of the most genuinely low-cost states to form and maintain an LLC — a $100 filing fee, a flat 5.3% state tax, and a $0 annual report. This guide walks all 8 steps, with a cost calculator and the details other guides skip.

Ahmad Adil Written & verified by Ahmad Adil, LLC School·Updated June 2026
Quick Answer

It costs $100 to file Idaho's Certificate of Organization online (or $120 by paper), with approval typically within a few business days. There's no franchise tax and no fee for the required Annual Report — Idaho is one of the few states that charges $0 for this yearly filing, due by the last day of your LLC's anniversary month. Idaho's flat 5.3% state income tax and lack of a general business license also make it a genuinely simple state to operate in.

Idaho LLC — Fast Facts
Filing fee
$100 online
Paper filing
$120
Processing
Several business days
Annual Report
$0
Report due
End of anniversary month
State income tax
Flat 5.3%
Formation doc
Certificate of Org.

Why Form an LLC in Idaho?

Idaho consistently ranks among the most affordable states to form and run an LLC — and it earns that reputation:

  • Genuinely cheap formation — $100 to file online, with no hidden add-on fees for the base filing.
  • Free ongoing compliance — the Annual Report costs $0 if filed online, a rare feature among US states.
  • No franchise tax — Idaho doesn't layer a separate business-privilege tax on top of income tax.
  • Simple flat-rate income tax — a single 5.3% rate applies to all taxable income, with no brackets to calculate.
  • No general statewide business license — fewer licensing hoops than many states, though local and industry-specific permits still apply.

Idaho LLC Cost Calculator

Toggle the options to see your total first-year cost:

Idaho LLC Cost Calculator
First-year formation + recurring cost
Certificate of Organization Required$100 online through SOSBiz$100
Annual Report Required$0 filed online — first one due the year after formation$0/yr
Registered agent serviceOptional — free if you act as your own Idaho agent$125/yr
Paper filing surcharge (optional)Only if filing by mail instead of online$20
Expedited processing (optional)Next-day service — same-day costs more$40
First-year total
$100
formation only, typically
Ongoing per year
$0
based on selections

Estimates only. Registered agent pricing varies by provider. Your first Annual Report isn't due until the year after formation, so most LLCs' actual first-year cash outlay is just the $100 filing fee. Not legal or tax advice.

Idaho LLC formation paperwork on a desk with mountain scenery visible through the window

The 8 Steps to Start Your Idaho LLC

Here's the full path from name to taxes. Each step has its own detailed guide with a tool to make it easier — the filing that legally creates your company is Step 3: Certificate of Organization:

1Name Your LLCPick a compliant, available name and check it with the state.Step 1 → 2Registered AgentAppoint an Idaho agent to receive legal documents.Step 2 → 3Certificate of OrganizationFile the $100 document that legally creates your LLC.Step 3 → 4Operating AgreementSet ownership and management rules (recommended).Step 4 → 5Get an EINYour free federal tax ID from the IRS.Step 5 → 6Annual ReportFile the free report by the end of your anniversary month.Step 6 → 7Business LicensesLocal permits and any industry-specific state licensing.Step 7 → 8LLC TaxesPass-through federal + Idaho's flat 5.3% state tax.Step 8 →

Idaho's Flat Income Tax

Idaho uses a flat 5.3% income tax rate — one of the simplest state tax systems in the country, with no brackets to calculate. As a default pass-through LLC, your share of profits flows to your personal return, taxed federally and then at Idaho's single flat rate. Idaho's sales tax is similarly straightforward: a flat 6% statewide, with a modest 3% Resort City Tax add-on only in a handful of tourist towns like Sun Valley and McCall. We break the full income tax picture down, with an estimator, in Step 8: Idaho LLC Taxes.

Idaho's Annual Report deadline is tied to your anniversary month, not a fixed dateYour report is due by the last day of the calendar month your LLC was originally approved in — every year. Form in March and it's due every March 31; form in November and it's due every November 30. See Step 6 for the full breakdown.

Ahmad Adil's Take: Idaho is genuinely one of the cheapest states to run an LLC in over the long haul — the $0 Annual Report is a real cost saver compared to the $50–$300/year many other states charge just to stay in good standing. Don't skip the report just because it's free, though; the state can still administratively dissolve your LLC if you miss it, even with no fee attached. Set a calendar reminder for your anniversary month the day your LLC is approved.
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Frequently Asked Questions

Idaho LLC — FAQ

How much does it cost to start an LLC in Idaho?
It costs $100 to file the Certificate of Organization online, or $120 by paper. After that, the required Annual Report is $0 if filed online.
Does Idaho have a franchise tax?
No — Idaho does not charge a separate franchise or business-privilege tax on LLCs.
How long does it take to form an Idaho LLC?
Typically a few business days for online filings through SOSBiz. Optional expedited processing (+$40) speeds this up to next-day, with same-day service also available for an added cost.
When is Idaho's Annual Report due?
By the last day of your LLC's anniversary month — the month it was originally approved — every year. Your first report isn't due until the year after formation.
What is Idaho's state income tax rate?
A flat 5.3% for 2026 — one of the simplest state income tax structures in the country, with a single rate and no brackets.
Can a non-resident form an Idaho LLC?
Yes — there's no residency requirement for members. You'll still need a registered agent with a physical Idaho street address.
Does Idaho require a general business license?
No — Idaho has no statewide general business license requirement, though local city/county permits and certain industry-specific state licenses may still apply.
Ahmad Adil, founder of LLC School
About the Author
Ahmad Adil

Ahmad Adil is the founder and CEO of LLC School. The figures here — the $100 Certificate of Organization fee, the $0 Annual Report, and Idaho's flat 5.3% state income tax — reflect current Idaho Secretary of State and Idaho State Tax Commission guidance. This is educational content, not legal or tax advice.

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