Forming an LLC in Idaho costs $100 to file the Certificate of Organization with the Idaho Secretary of State, with online approval through SOSBiz in 7–10 business days (or 1 business day for $40 extra). Idaho's standout feature is its $0 annual report — you confirm your LLC information each year in your anniversary month, but there's no fee. Combined with a flat 5.695% state income tax, no franchise tax, and a flat 6% sales tax, Idaho is one of the cheapest states to maintain an LLC long-term. Boise has been one of the fastest-growing metros in the U.S. for the past decade, with strong software, outdoor industry (Black Diamond, Backcountry headquarters nearby in UT but with Idaho ties), and ag-tech clusters. For founders relocating to the Mountain West, Idaho competes head-to-head with Utah and Wyoming on cost.
Why form your LLC in Idaho
Boise is one of the fastest-growing metros in the U.S. for software and outdoor brands. Free annual reports keep ongoing costs minimal once you’re past formation.
- Free annual report ($0 fee — informational only)
- No franchise tax
- Flat 5.695% income tax (and flat 6% sales tax)
- Boise is one of the fastest-growing tech metros in the U.S.
- Strong agriculture, outdoor, and software clusters
- Online filing in 7–10 business days; expedited 1-day for $40
Best fit for: Tech (Boise) · Agriculture (potatoes, dairy) · Outdoor industry
Don’t want to file yourself? Northwest Registered Agent files your Idaho LLC for $39 + state fee and acts as your registered agent the first year free.
How to form a Idaho LLC in 7 steps
- 1Search the Idaho business name database
Use the Idaho Secretary of State SOSBiz business search. The name must include "Limited Liability Company", "Limited Company", "LLC", "L.L.C.", "LC", or "L.C." Reserve a name for $20 (held 4 months) if needed.
- 2Appoint an Idaho registered agent
Required to have a physical Idaho street address (no PO boxes). Can be the LLC owner if they're an Idaho resident, or a commercial service.
- 3File the Certificate of Organization
File online through SOSBiz for $100. Standard processing is 7–10 business days; expedited 1-day is $40 extra ($140 total). The Certificate includes LLC name, registered agent, principal office, mailing address, and signed acknowledgment by an organizer.
- 4Draft an Operating Agreement
Not required by Idaho law but strongly recommended. Defines membership interests, voting, profit/loss splits, and dissolution. Banks routinely ask for it.
- 5Apply for an EIN with the IRS
Free at irs.gov, takes 10 minutes online. Required for opening a business bank account, registering with the Idaho State Tax Commission, and filing federal taxes.
- 6Register with the Idaho State Tax Commission
Register through Idaho's Taxpayer Access Point (TAP) for sales and use tax (if you sell taxable goods/services), withholding tax (if you have employees), and other applicable accounts.
- 7Calendar the annual report (informational only)
Idaho LLC annual reports are due each year in the LLC's anniversary month. There's no fee — you simply confirm your information online. But missing the filing leads to administrative dissolution. The state sends reminders, but set your own calendar.
File directly with Idaho Secretary of State →
Idaho LLC taxes & compliance
No fee on annual reports — you just confirm your info each year. Income tax is a flat 5.695%; sales tax is a flat 6%.
Ongoing compliance checklist
- Annual report — $0, due in the LLC's anniversary month (informational only)
- No franchise tax
- Sales and use tax filings (Idaho State Tax Commission)
- Withholding tax filings if you have ID employees
- Federal income tax (Form 1065 multi-member, Schedule C SMLLC)
Registered agent rules
Required — ID street address.
Hidden costs new Idaho LLC owners forget
- Standard processing of 7–10 business days — pay $40 for 1-day
- Sales tax registration with Idaho State Tax Commission
- Local city/county licenses where applicable
- Foreign LLC qualification: $100
- Name reservation: $20 (optional, valid 4 months)
- Late annual report: $30 reinstatement fee + administrative dissolution risk
Should you use a formation service in Idaho?
You can absolutely file directly with the Idaho Secretary of State for the $100 state fee. The reasons most Idaho owners use a service anyway are (1) registered-agent privacy — keeping their home address off public filings — and (2) calendar reminders for ongoing compliance.
Have Northwest form your Idaho LLC for $39 + state fee
Free registered agent for the first year. Real human support. Privacy-by-default — your home address stays off public filings.
Idaho LLC: frequently asked questions
How much does it cost to start an LLC in Idaho?
Idaho Secretary of State charges $100 to file the Certificate of Organization. The annual report is free ($0). Realistic year-one cost: $100. Ongoing yearly cost: $0 in state fees — making Idaho one of the cheapest states to maintain an LLC. Add $99–$300/year if you use a commercial registered agent.
How long does it take to form an LLC in Idaho?
Online filings through SOSBiz approve in 7–10 business days. Expedited 1-day processing is available for $40 extra. Mail filings take 2–3 weeks.
Does Idaho have an LLC annual report fee?
No fee — Idaho is one of the few states with a $0 annual report. You still must file each year in the LLC's anniversary month to confirm your information, but it's free. Failing to file leads to administrative dissolution.
Does Idaho have an LLC franchise tax?
No franchise tax. Pass-through LLCs pay no state-level entity tax. Owners pay personal income tax (flat 5.695%) on their share of LLC profits.
Can a non-resident form an LLC in Idaho?
Yes. Idaho has no residency requirement for LLC members or managers. You only need an Idaho-based registered agent. Many out-of-state founders form Idaho LLCs for the $0 annual report and growing tech ecosystem.
Is Idaho a good state to form an LLC?
Yes — particularly for residents and businesses with a real Idaho presence. The $100 filing + $0 annual report combination is one of the cheapest in the U.S. long-term. Boise's tech and outdoor-industry growth makes it attractive for relocating founders. The flat 5.695% income tax is moderate.
Do I need a business license for an Idaho LLC?
Idaho does not have a state-level general business license. Specific industries (real estate, contractors, food service, professional services) require state licensing through the relevant board. Some cities (Boise, Idaho Falls, Coeur d'Alene) require local business registration.
What's the Idaho LLC sales tax rate?
Idaho has a flat 6% state sales tax with limited local add-ons. If you sell taxable goods or services, register with the Idaho State Tax Commission through TAP. Idaho's sales tax base is broader than some states (it taxes some services that other states exempt), so check the Tax Commission's sales tax guide.