LLC formation in Idaho: fees, filing steps, and ongoing costs
Data last updated: Apr 21, 2026Where Idaho fits, and where it doesn't
Good fit for Idaho
You live in Idaho and operate your business from anywhere in the Treasure Valley, eastern Idaho, or the panhandle. You run a consulting, trades, retail, ranching, or outdoor-services operation with Idaho customers. You are tired of states that bundle an annual report fee on top of a franchise tax on top of a license fee. You want one filing at formation, a free online renewal each year, and a state that otherwise leaves you alone.
Skip Idaho when
You live in California and someone told you forming in Idaho would save you the $800 annual franchise tax. It will not. California considers a single-member LLC owned by a California resident to be doing business in California regardless of where it is formed, so the $800 minimum follows you home. You are a non-resident online founder looking for the cheapest formation state by sticker price. Idaho's free annual report is real, but once you factor in an Idaho registered agent you are at roughly the same annual cost as Wyoming without Wyoming's privacy advantages.
What an Idaho LLC actually costs
- Formation filing fee Paid once at formation $100
- Commercial registered agent Annual, estimate $100
- Annual state obligations None in this state $0
- Year 1 total estimate Formation plus first-year ongoing $200
Registered agent estimate uses a $100 midpoint. Specialist agents start around $50 per year. Full-service formation companies bundle RA for $125 to $200.
Cost across the first three years
How Idaho compares on the basics
How to apply for an LLC in Idaho
- Pick a compliant LLC name
The name must end in "Limited Liability Company," "LLC," or an approved abbreviation, and must be distinguishable from every other entity on the Idaho Secretary of State record. Check availability at the Idaho entity search.
- Designate a registered agent
Every Idaho LLC is required to have a registered agent with a physical street address in Idaho. You can serve as your own agent if you live in Idaho, or hire a commercial service for $99 to $249/yr. See the Idaho registered agent guide.
- File Certificate of Organization Limited Liability Company
Filing fee is $100. Online filing is available through the state portal. Mail filings are accepted. Paid expedite is available for $40.
- Apply for a federal EIN
Free directly from the IRS in about 15 minutes (see the EIN guide). Required for opening a business bank account, hiring employees, and most formation-service tax workflows.
- Adopt an operating agreement
Idaho does not require an operating agreement by statute, but adopting one is strongly recommended to preserve the liability shield. See the operating agreement pillar for the 12 clauses every agreement should include.
Filing walkthrough
You file the Certificate of Organization online through Idaho SOSBiz at sosbiz.idaho.gov. The online filing fee is $100; paper filings add a $20 manual processing fee, bringing the paper total to $120. Online filings typically clear in 7 business days; mail filings take around 10 business days. Idaho does offer paid expedited service: $40 for 8 hours turnaround, or $100 for same-day processing if you need it.
Every Idaho LLC needs a registered agent with an Idaho street address, and commercial agents run $50 to $125 a year. The Certificate of Organization instructions include one unusual detail worth calling out: 'Please do not attach operating agreements. They are not filed with this office.' Idaho Code Section 30-25-201(C) makes clear the operating agreement stays between the members and never touches the Secretary of State's desk. Do not send one in with the Certificate, and the filing goes through clean.
How Idaho taxes an LLC
Idaho has a flat 5.3 percent corporate income tax, reduced from 5.695 percent effective January 1, 2025. The rate applies only to C-corps and to LLCs that have elected C-corp treatment with the IRS, with a $20 minimum tax. A pass-through LLC (single-member disregarded entity or multi-member partnership) owes no entity-level Idaho income tax.
Members of a pass-through LLC report distributive shares on their Idaho personal income tax return, where the rate is also a flat 5.3%. Idaho is unusual in running identical flat rates on individual and corporate income. The effect for most small LLC owners is a predictable state tax bill: 5.3 percent of Idaho-source net income, plus federal tax at whatever applies.
Idaho's statewide sales tax is 6.0%. A handful of resort cities (Ketchum, Sun Valley, McCall, Stanley, and a few others) may levy local option sales taxes on top, but there is no general local sales tax. There is no franchise tax, no privilege tax, no gross-receipts tax like Ohio's CAT or Oregon's CAT or Washington's B&O. Idaho's tax regime is about as straightforward as a state income tax state gets.
Ongoing compliance and costs after year one
Budget $50 to $125 a year for a commercial registered agent and that is the whole state-level bill after year one. The annual report is free when filed online through SOSBiz, and filing is mandatory even though the fee is zero. Miss it by more than 60 days and the Secretary of State will administratively dissolve the LLC, which is a slow and expensive mistake to reverse. Set a recurring calendar reminder for the end of your anniversary month.
If you foreign-qualify in another state because you operate there too, that state's fees and report stack on top independent of Idaho's side. The Idaho math stays the same: one filing fee at formation, $0 to Boise every year after that, and a registered agent.
Common mistakes forming an Idaho LLC
Two patterns come up. First, filers skip the annual report because the fee is $0 and assume no fee means no filing. The filing is required even when the fee is zero, and the SOSBiz portal will not let the state track the LLC without it. A skipped report leads to administrative dissolution 60 days after the deadline. Second, paper filers get surprised by the $20 manual processing fee on top of the base $100. Paper formations run $120, paper annual reports run $20, and neither of those surcharges applies if you file online. Use SOSBiz unless you have a specific reason not to.
State agencies that handle Idaho LLCs
Idaho Secretary of State - Business Services Division
- Website
- sos.idaho.gov
- Phone
- (208) 334-2301
- Office of the Secretary of State, 450 N 4th Street, PO Box 83720, Boise, ID 83720-0080
- Office
- 450 N 4th Street, Boise, ID 83702
- Hours
- 8:00 AM to 5:00 PM Mountain, Monday to Friday
Idaho State Tax Commission
- Website
- tax.idaho.gov
- Phone
- (208) 334-7660
- Idaho State Tax Commission, PO Box 36, Boise, ID 83722-0410
- Office
- 11321 W Chinden Blvd, Building 2, Boise, ID 83714
- Hours
- 8:00 AM to 5:00 PM Mountain, Monday to Friday
Frequently Asked Questions
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How much does it cost to form an LLC in Idaho in 2026?
The online filing fee is $100, paid once through Idaho SOSBiz when you file the Certificate of Organization. Paper filings add a $20 manual processing fee for a $120 paper total. Plan for another $50 to $125 per year for a commercial registered agent with an Idaho street address. The annual report is free when filed online, so year two and beyond cost nothing to the state itself.
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Does Idaho have an annual report for LLCs?
Yes, and it is free when filed online through SOSBiz. The annual report is due by the end of the LLC's anniversary month each year. Paper filings incur the $20 manual processing fee, but the base fee is $0. Filing is mandatory even at zero cost, and the Secretary of State administratively dissolves the LLC within 60 days of a missed deadline.
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Do Idaho LLCs pay state income tax?
Default pass-through LLCs owe no entity-level Idaho income tax. Members report distributive shares on their Idaho personal income tax return at a flat 5.3%. An LLC that elects C-corp treatment with the IRS pays Idaho corporate income tax at the same flat 5.3% rate, with a $20 minimum tax. Federal tax applies on top of either path.
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Does Idaho have a franchise tax on LLCs?
No. Idaho imposes no franchise tax, no privilege tax, no gross-receipts tax, and no annual LLC license tax. C-corps (and LLCs that elect C-corp treatment) pay the 5.3 percent corporate income tax with a $20 minimum, which is an income tax rather than a franchise tax. Pass-through LLCs have no entity-level state tax obligation at all.
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How long does it take to form an Idaho LLC?
Online filings through SOSBiz typically clear in 7 business days. Mail filings take around 10 business days. Expedited service is available at $40 for 8 hours turnaround, and same-day service is $100 if you need it.
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Should I form my LLC in Idaho instead of my home state?
Only if you live or operate in Idaho. Idaho's free annual report and flat tax structure are genuinely friendly, but forming here from another state still requires foreign qualification back home, so your home state's fees and reports stack on top. For non-resident online businesses, Wyoming is typically the cheaper and more private pick. Idaho is a home-state pick.
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Does Idaho require an operating agreement?
No, and the Certificate of Organization instructions explicitly ask you not to file one. Idaho Code Section 30-25-201(C) recognizes oral, written, and implied operating agreements under the Idaho Uniform Limited Liability Company Act, but the agreement stays between members and is never submitted to the Secretary of State. A written agreement is still strongly advised for multi-member LLCs and for preserving the liability shield if a dispute reaches court.
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How do I apply for an LLC in Idaho?
Apply for an LLC in Idaho by filing Certificate of Organization Limited Liability Company with Idaho Secretary of State - Business Services Division. The filing fee is $100. Online filing is available through the state portal. Approval typically takes 7 business days online. Mail filings take about 10 business days. Before filing, pick a registered agent (see the Idaho registered agent guide) and confirm your business name is available using the state's entity search.
Further reading on LLCs
How much does an LLC cost?
Formation, annual, and hidden fees broken down across all 51 US jurisdictions.
Registered agents for LLCs
What the role is, whether to be your own, and honest comparison of 12 national services.
LLC vs sole proprietorship
Liability, taxes, cost, and when each makes sense. Written for a working owner.
LLC vs S-corp election
When the S-corp tax election actually saves money, with concrete SE-tax math.
Dissolve a Idaho LLC
Step-by-step dissolution: member vote, tax clearance, state filing, IRS closure.
Formation services compared
Bizee, Northwest, ZenBusiness, LegalZoom, and 11 more. Honest price comparison.
Compare Idaho to another state
Side-by-side breakdowns of fees, taxes, approval time, and compliance. Every other US jurisdiction has a dedicated compare page against Idaho.
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Sources
- Filing fee: sos.idaho.gov/CORP/forms/LLC/LLC%20Cert%20org.pdf · verified April 21, 2026
Idaho SoS Certificate of Organization Limited Liability Company form (Title 30, Chapters 21 and 25, Idaho Code): base filing fee is $100.00. Paper filings add a $20.00 manual processing fee, bringing the paper total to $120.00. Online filings through SOSBiz are the $100 base rate. - Expedited filing: sos.idaho.gov/CORP/forms/LLC/LLC%20Cert%20org.pdf · verified April 21, 2026
Certificate of Organization instructions: expedited service adds $40.00 (8-hour); same-day service adds $100.00. Recording the cheapest expedited tier (8-hour, $40) as the default expedited fee. - Foreign LLC registration fee: sos.idaho.gov/business-forms/ · verified April 21, 2026
Foreign LLC Foreign Registration Statement base filing fee is $100.00 online through SOSBiz; paper filings add the $20 manual processing fee for a $120 paper total. - Operating agreement requirement: legislature.idaho.gov/statutesrules/idstat/Title30/T30CH25/ · verified April 21, 2026
Idaho Uniform Limited Liability Company Act, Idaho Code Title 30, Chapter 25, does not require a written operating agreement. The Certificate of Organization instructions explicitly state: 'Please do not attach operating agreements. They are not filed with this office.' (Idaho Code Section 30-25-201(C)). - Publication requirement: sos.idaho.gov/business-forms/ · verified April 21, 2026
Idaho Uniform LLC Act and SoS filing instructions contain no publication requirement for LLCs. - Annual report fee: sos.idaho.gov/annual-report-help/ · verified April 21, 2026
Idaho annual report filing fee is $0 for online filing through SOSBiz. Paper annual report filings incur the $20 manual processing fee. Due by the end of the anniversary month; administrative dissolution follows 60 days of non-filing. - Franchise tax: tax.idaho.gov/ · verified April 21, 2026
Idaho State Tax Commission imposes no franchise tax on LLCs. C-corps (including LLCs electing C-corp treatment) pay the 5.3% corporate income tax with a $20 minimum; this is an income tax, not a franchise tax. - Corporate income tax rate: tax.idaho.gov/pressrelease/whats-new-for-2025-income-tax-returns/ · verified April 21, 2026
Idaho corporate income tax rate reduced to 5.3% (flat) effective retroactive to January 1, 2025, per House Bill signed in 2025. Previous rate was 5.695%. The 5.3% rate continues in 2026. Corporate minimum tax is $20. Idaho individual rate is also a flat 5.3%. - Sales tax rate: tax.idaho.gov/taxes/sales-use/ · verified April 21, 2026
Idaho statewide sales and use tax rate is 6.0%. A small number of resort cities may impose local option sales taxes, but there is no general local sales tax. - Business name search: sosbiz.idaho.gov/search/business · verified April 21, 2026
Idaho SOSBiz business entity search. Confirm name availability before filing Certificate of Organization (Idaho Code Section 30-21-301 governs LLC name requirements). - Online filing portal: sosbiz.idaho.gov/ · verified April 21, 2026
Idaho SOSBiz is the online business filing portal. Requires free account. Online filings bypass the $20 manual processing fee that applies to paper submissions.