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Posted on • Originally published at llcformationcost.com

Form an LLC in Idaho: Total Cost & Filing Steps (2026)

#llc #cost #idaho

Idaho LLC Cost: $100 Filing + $0 Annual Report (2026)

Forming an LLC in Idaho costs $100 to file a Certificate of Organization with the Secretary of State, and the annual report is free. Year-one cost: $100. Five-year cost of ownership: $100. Idaho is one of only a handful of US states with a $0 annual report fee, making it the cheapest 5-year baseline cost in the country for any LLC owner who wants to file paperwork annually without paying a fee. The annual report is still mandatory (free does not mean optional), and Idaho will administratively dissolve LLCs that miss the filing.

Reviewed by LLC Formation Cost Editorial Team, fact-checked against primary government sources • Last updated 2026-05-15 • 5 primary government sources cited

TL;DR

Idaho LLCs file a Certificate of Organization with the Idaho Secretary of State for $100. The annual report is required but the fee is $0, Idaho is among the only US states where the annual report carries no cost. There is no franchise tax for pass-through LLCs (the state-level franchise tax under Idaho Code § 63-3025 applies only to C-corporations and to LLCs that elect federal C-corp status, with a $20 minimum). Idaho has a personal income tax of 5.695% (flat rate as of 2026 after recent simplification), which taxes pass-through LLC profits at the member level. The big trade-off: processing times are slow. Idaho SOS lists 15-20 business days as standard turnaround, with $40 expedite cutting it to 1 day. Online filings via sosbiz.idaho.gov are the only practical filing method.

Idaho LLC cost breakdown (2026)

Line item Cost Source
Certificate of Organization $100 sosbiz.idaho.gov
Annual Report $0 (free, but mandatory) sosbiz.idaho.gov
Expedite (24-hour) +$40 sosbiz.idaho.gov
Franchise tax (only if LLC elects C-corp) $20/yr min tax.idaho.gov
Registered Agent service (Idaho-resident required) $50-$200/yr n/a
Year 1 total (DIY, no add-ons) $100
Year 2+ ongoing (DIY no RA) $0
5-year total (DIY) $100

All figures verified 2026-05-15 from primary Idaho state sources.

Why Idaho is structurally cheap

Idaho ranks among the top five cheapest states for 5-year LLC ownership, alongside New Mexico ($50), Missouri ($50), Ohio ($99), and Arizona ($50). The structure that gets Idaho there:

  • $100 filing fee is in line with the national median (the range is $40 in Kentucky to $500 in Massachusetts).
  • $0 annual report is the unusual piece. Idaho keeps the annual report mandatory for compliance reasons (the state needs current registered agent information) but doesn't charge for the filing.
  • No franchise tax for pass-through LLCs. Idaho Code § 63-3025 reserves franchise tax for C-corporations and for LLCs that affirmatively elect federal C-corp status. The minimum is $20/yr in that scenario; standard pass-through LLCs owe $0.
  • No publication requirement. Idaho does not require LLCs to publish formation notices in newspapers (unlike Arizona, Nebraska, or New York).

The trade-off Idaho asks of you in exchange for the cheap fee structure is processing time. SOS standard turnaround on Certificate of Organization filings has been 15-20 business days in 2025-2026, the slowest standard processing in the US along with Maine (35 days). Idaho's $40 expedite drops the timeline to 1 business day, which is the practical option for any founder with a deadline.

Filing steps (DIY, no service)

  1. Pick a name, search availability at sosbiz.idaho.gov. Names must include "Limited Liability Company," "LLC," or "L.L.C." and cannot duplicate or closely resemble an existing Idaho entity.
  2. Designate a registered agent, must have an Idaho street address (Idaho Code § 30-25-115). You can act as your own agent if you live in Idaho.
  3. File the Certificate of Organization, $100 via sosbiz.idaho.gov. Online is the only practical method; mail filings exist but processing times are even slower.
  4. Get a federal EIN, free at irs.gov.
  5. Draft an operating agreement, Idaho Code § 30-25-105 recognizes operating agreements but does not require them. Standard practice for any LLC.
  6. Register with the Idaho State Tax Commission, get the sales tax permit (free) via the Idaho Business Registration system, employer registration if hiring, and any industry-specific permits.
  7. Apply for any necessary licenses, Idaho does not have a statewide business license, but cities (Boise, Meridian, Idaho Falls) and industries (contractors, real estate, food service) have their own requirements.
  8. Open a business bank account, Idaho-licensed banks (Idaho Independent Bank, D.L. Evans Bank, Mountain West Bank, U.S. Bank) work.
  9. File the FinCEN BOI report, required under the Corporate Transparency Act within 30 days of formation. Free to self-file at fincen.gov/boi.
  10. Calendar the annual report, due by the end of the LLC's anniversary month each year. Free, but mandatory. File via sosbiz.idaho.gov.

Online Certificate of Organization filings: 15-20 business days standard, 1 business day with $40 expedite. Mail filings take 6+ weeks and are not recommended.

Page-unique facts

  • Idaho has one of only six $0 annual report fees in the US. Alongside Arizona ($0, no report), Missouri ($0, no report), New Mexico ($0, no report), Ohio ($0, no report), South Carolina ($0, no report). Idaho's $0 is different because it does require the annual report filing, it just charges nothing for it.
  • Standard processing time is 15-20 business days. Idaho is one of the slowest states for standard turnaround. The $40 expedite is essentially mandatory for anyone with a deadline.
  • Idaho switched to a flat personal income tax of 5.695% in 2025, simplifying what used to be a graduated 1.125%-6% structure. Pass-through LLC profits hit this rate at the member level.
  • No publication requirement. Idaho does not require newspaper publication of LLC formation (unlike Arizona, Nebraska, or New York).
  • Registered agent must have an Idaho physical address. P.O. boxes don't qualify under Idaho Code § 30-25-115.

FAQ

Why is the Idaho annual report free?

Because the Idaho legislature chose, when it modernized the state's business filings, to keep the annual report mandatory for compliance purposes (the state needs current registered agent and principal address information) but not to fund the SOS's business division through annual report fees. Instead, SOS revenue comes from formation fees, expedite charges, and other transactional fees. The result is one of the cheapest 5-year baselines in the country at $100 lifetime. Source: Idaho Secretary of State Business Services, verified 2026-05-15.

Is the annual report optional if it's free?

No. The Idaho annual report is mandatory under Idaho Code § 30-25-209, just free. Miss the deadline and the SOS will mark the LLC as delinquent, then administratively dissolve the entity if non-compliance continues. The deadline is the end of the LLC's anniversary month each year. Source: Idaho Code Title 30 Chapter 25, verified 2026-05-15.

How long does Idaho LLC formation take?

Standard online filing: 15-20 business days. Expedite (1-day turnaround): additional $40. Mail filings: 6+ weeks. Idaho's standard processing time has been among the slowest in the US since 2024 due to staffing constraints at the SOS. The $40 expedite is the practical default for anyone with a deadline. Source: Idaho Secretary of State Business Services, verified 2026-05-15.

Does Idaho have a franchise tax for LLCs?

Not for pass-through LLCs. Idaho Code § 63-3025 imposes a franchise tax on C-corporations and on LLCs that elect federal C-corp status, with a $20 minimum. A standard single-member or partnership-taxed LLC owes $0 franchise tax. The state-level personal income tax (flat 5.695%) applies to LLC profits at the member level. Source: Idaho State Tax Commission, verified 2026-05-15.

Does Idaho require an operating agreement?

No. Idaho Code § 30-25-105 recognizes operating agreements as binding between members but does not require them. Standard practice for any LLC. Banks will typically still ask to see one before opening a business account, especially for multi-member LLCs. Source: Idaho Code Title 30 Chapter 25 (Uniform LLC Act).

Is Idaho a good state for non-resident formations?

For pure cost: yes, the 5-year baseline is $100 lifetime. For practical convenience: less so. Non-resident formation requires hiring an Idaho registered agent service ($99-$150/yr), and the 15-20-day standard processing time means most non-resident founders end up paying the $40 expedite as well. Even so, the all-in 5-year cost runs $640-$890 with services, which beats Connecticut ($1,000+) and rivals Wyoming ($340 DIY but $700-$1,200 with services). Source: Idaho Secretary of State Business Services.

State quirk: the free-but-mandatory annual report

Idaho's annual report is one of only a handful in the US that is required as a matter of compliance but priced at $0. The state keeps the mandate because the annual report serves a real function: it confirms the LLC's current registered agent (so the state knows where to serve process), principal office address (so the state knows where the entity actually does business), and current managers or members (for entities that have changed structure). The state declines to charge for the filing because the historical legislative position has been that the formation fee covers the perpetual record-keeping cost, and the annual confirmation is a low-friction administrative checkbox rather than a revenue source. The downside is administrative dissolution risk: founders who see "$0" and assume "optional" get blindsided when the SOS marks the LLC delinquent (after the anniversary month passes) and then administratively dissolves the entity after a year or two of non-filing. Reinstatement is possible but more expensive than the original filing. Calendar the annual report even though it's free. The same logic applies in Ohio, where there is no annual report at all, the absence of a fee does not mean the absence of paperwork in every state.

Common mistake in Idaho

The most common Idaho LLC mistake is missing the free-but-mandatory annual report and ending up administratively dissolved. Founders see "$0 annual report fee" and assume the report itself is optional. It's not. The second most common mistake is filing on the standard processing timeline and being surprised by the 15-20 business day turnaround. For any founder who needs to open a bank account, sign a lease, or close a contract that requires a filed LLC, the $40 expedite is essentially mandatory.

Sources

  1. Idaho Secretary of State Business Services Portal, last verified 2026-05-15
  2. Idaho Code Title 30 Chapter 25 (Idaho Uniform Limited Liability Company Act), last verified 2026-05-15
  3. Idaho State Tax Commission Business Taxes, last verified 2026-05-15
  4. Idaho Business Registration System, last verified 2026-05-15
  5. IRS Publication 3402, Taxation of Limited Liability Companies, last verified 2026-05-15
  6. IRS Apply for an Employer Identification Number Online, last verified 2026-05-15

About the author

Aissam Baidi is the founder and researcher behind llcformationcost.com. He verifies Idaho LLC fees directly from sosbiz.idaho.gov on a quarterly cycle. Connect on LinkedIn.

Not legal advice. Estimates based on publicly available data from each state's Secretary of State office. Consult a licensed attorney in your jurisdiction.

This is a syndicated post. Original article + interactive calculator: https://llcformationcost.com/idaho-llc-cost/

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