How to Form an LLC in Idaho (2026): Real Costs, Real Steps

Idaho keeps LLC formation straightforward with a flat $100 filing fee and no publication requirements. You'll file Articles of Organization with the Idaho Secretary of State, appoint a registered agent with a physical Idaho address, and obtain an EIN from the IRS—all within a few days if you file online. Idaho requires an annual report due by the last day of your formation anniversary month, costing $0 (yes, zero dollars). The state has a corporate income tax of 5.8% on LLC net income if you're taxed as a corporation, but most single-member and multi-member LLCs enjoy pass-through taxation with no entity-level state tax. Total first-year cost typically runs $225–$250 including a quality registered agent like Northwest.

Year-1 Cost Table

Idaho LLC year-1 cost breakdown (2026)
Item Cost Source
Articles of Organization (online filing) $100 cite
Annual Report $0 cite
Registered Agent (Northwest, 1st year) $125 cite
Expedited processing (optional, 24-hour) $100 cite
Estimated Year-1 Total $225 cite

The 6 Steps

  1. Step 1: File Articles of Organization

    Submit the formation document to the Idaho Secretary of State. See the cost table above for the current filing fee.

  2. Step 2: Appoint a Registered Agent

    Every Idaho LLC needs a registered agent with a Idaho street address. You can serve yourself, but most founders use a commercial RA — Northwest is our default pick.

  3. Step 3: Get an EIN (Federal Employer Identification Number)

    Apply with the IRS using your stamped Articles of Organization. Free, takes 5 minutes online.

  4. Step 4: Adopt an Operating Agreement

    Required by best practice — banks routinely request it before opening business accounts.

  5. Step 5: Open a Business Bank Account

    Mercury for software/online businesses; a local credit union for cash-heavy retail. Keep personal and business finances separate from day one.

  6. Step 6: File State Tax Registrations

    Register for Idaho state taxes (sales tax permit, payroll registration if you have employees, etc.) before you transact.

Recommended Tools

Northwest vs ZenBusiness for Idaho LLCs

Verdict (as of 2026): Northwest Registered Agent is our default pick for Idaho LLCs. They publish a Idaho-specific registered-agent page (linked in the cost table) and do not upsell add-ons at checkout. ZenBusiness wins only if you want bundled formation in a single flow.

Criterion Northwest ZenBusiness
Registered-agent only price (Idaho)$125/yr$199/yr
Bundled formationOptional add-onIncluded in formation plans
Privacy (address shielding)StrongStrong
Upsells at checkoutNoneSeveral
Annual-report filing service$100/yr add-on$199/yr add-on

Frequently Asked Questions

Does Idaho charge anything for the annual report?

No. Idaho is one of the few states that offers completely free annual reports when filed online through the Secretary of State's portal. You must still file on time each year to maintain good standing.

Does Idaho have a state income tax on LLCs?

Idaho has a 5.8% corporate income tax, but most LLCs are taxed as pass-through entities (disregarded entity or partnership), so profits flow to members' personal returns and are taxed at individual income tax rates (up to 5.8%). Only LLCs electing C-corp taxation pay entity-level tax.

How long does Idaho LLC approval take?

Online filings through the Idaho Secretary of State typically process within 1–3 business days. Paper filings take 7–10 business days. You can pay $100 for 24-hour expedited service if you need faster approval.

Can I use a PO Box for my registered agent address in Idaho?

No. Idaho requires your registered agent to have a physical street address in Idaho where service of process can be delivered during business hours. A PO Box alone is not acceptable, though you may list one as a mailing address separately.

Do I need an operating agreement in Idaho?

Idaho does not legally require an operating agreement, but it's highly recommended. An operating agreement defines ownership percentages, management structure, profit distribution, and dispute resolution, which protects multi-member LLCs and strengthens your liability shield even for single-member LLCs.

Annual Filing Deadline

Idaho annual reports are due by the last day of the anniversary month in which your LLC was formed and cost $0 to file online.

Authoritative Sources

Other States

Skip the research — let AthenAI form your Idaho LLC