● Idaho · Incorporation

How to Incorporate in Idaho

Incorporate in Idaho in one of the most business-friendly, low-tax states – CountSure files your Articles, sets a clean share structure, and tracks your free annual report. $100 to file, flat 5.3% tax, and a free annual report.

Requirements, costs & steps to incorporate in Idaho

Incorporating in Idaho creates a formal entity with directors, officers, and stock in one of the most business-friendly, low-tax states in the country. Idaho keeps it simple: $100 to file, a free annual report, no franchise tax, and a flat 5.3% corporate income tax. This guide covers the cost, the filing steps, and ongoing compliance. To compare structures first, read our LLC vs. corporation guide, or let our Idaho incorporation service file it all for you.

The short answer: To incorporate in Idaho you file Articles of Incorporation with the Secretary of State through SOSBiz for $100 online ($120 by paper), appoint a registered agent with a physical Idaho address, and set your authorized stock. You need at least one director – director names are not listed in the Articles – and you adopt bylaws internally. Corporations then file a free ($0) annual report by the last day of their anniversary month, and pay Idaho’s flat 5.3% corporate income tax. There is no franchise tax.

You can verify the fees from official website of Idaho – Click here to verify

● Key takeaways

What you need to know?

Filing fee: $100 online for Articles of Incorporation ($120 by paper, incl. $20 manual-processing fee), filed via SOSBiz.
Free annual report: Mandatory but $0, due by the last day of your incorporation anniversary month.
Flat 5.3% corporate tax: Idaho’s corporate income tax is a flat 5.3% (2025+), with no franchise tax and no gross receipts tax - plus a $20 minimum tax and a $10 Permanent Building Fund tax.
Directors: At least one director required, but director and officer names are NOT listed in the Articles of Incorporation.
Stock is fee-neutral: Authorized shares are listed in the Articles, but increasing the share count does not raise the filing fee.

Idaho corporation at a glance

The essentials for incorporating and maintaining an Idaho corporation.

Requirement	Detail (2026)
Formation document	Articles of Incorporation
Filing agency	Idaho Secretary of State (SOSBiz)
State filing fee	$100 online / $120 paper (+$20 manual processing)
Registered agent	Required; physical Idaho street address (no PO box)
Directors	Min. 1; must be 18+; not listed in the Articles
Officers	Required; not listed in the Articles
Bylaws	Required (internal; not filed)
Annual report	$0 (free), by anniversary month
Corporate income tax	Flat 5.3% (2025+); $20 min. + $10 PBF tax; no franchise tax
S-corp election	Recognized (federal election honored)

● Step by step

How to incorporate in Idaho, step by step

Seven steps from name check through your free anniversary-month annual report.

Choose a compliant corporate name

Reserve a name for four months for $20 (Application for Reservation of Legal Entity Name) if desired. Idaho corporate names must include “Corporation,” “Incorporated,” “Company,” “Limited,” or an abbreviation, be distinguishable from existing names, and not mislead the public.

Appoint a registered agent

An Idaho resident or qualifying business with a physical Idaho street address (no PO boxes), available during business hours. CountSure can serve as your registered agent.

Prepare your stock structure

List your authorized shares (at least one) in the Articles. Increasing the number of authorized shares does not change the Idaho filing fee, so you can size your cap table for future financing at no extra cost.

File Articles of Incorporation on SOSBiz

File online for $100 ($120 by paper). The Articles list the corporate name, authorized shares, registered agent, incorporator, and mailing address. The corporation exists on filing (unless you specify a future date) and has perpetual existence unless limited. Director names are not required.

Adopt bylaws and hold an organizational meeting

Appoint directors and officers, adopt bylaws (internal, not filed), and authorize stock issuance; keep minutes and a stock ledger in your corporate records.

Issue stock and get an EIN

Document share issuance to shareholders; obtain a free EIN; to elect S-corp treatment, file IRS Form 2553.

Register for taxes and calendar the annual report

Register with the Idaho State Tax Commission (TAP) for corporate income tax, withholding, and sales tax as needed, and diarize the free annual report due by the last day of your incorporation anniversary month.

● Directors & documents

Director & formation requirements

Idaho keeps director rules light and doesn’t list directors on the public Articles. Here’s what to get right.

Ongoing Idaho corporation compliance & taxes

Corporate records

Keep the Articles, bylaws, stock ledger, current director and officer lists, and minutes of shareholder and board meetings at your principal office. Idaho doesn’t collect these, but observing the formalities is what preserves limited liability.

Annual report - free, anniversary month

Idaho corporations file an annual report through SOSBiz before the end of the anniversary month of incorporation, each year. There is no fee. The report lists current directors and officers and confirms the registered agent. Failure to file can result in penalties and administrative dissolution. As with LLCs, watch for deceptive solicitations – the Idaho SOS has warned about mailings that mimic official notices; file only through SOSBiz.

Corporate income tax - flat 5.3%

Idaho levies a flat 5.3% corporate income tax on C-corporation income (2025+, HB 40), with no franchise tax and no gross receipts tax. Corporations file Form 41 with the State Tax Commission. Two fixed amounts apply alongside the rate: a $20 minimum corporate income tax (the tax is never less than $20) and a separate $10 Permanent Building Fund tax that virtually every corporation filing a return must pay. A multistate corporation whose only Idaho activity is sales under $100,000 may elect to pay 1% of Idaho gross sales instead of tax on net income.

S corporation election

Idaho recognizes the federal S-corporation election; income generally passes through to shareholders and is taxed at the flat 5.3% individual rate. An Idaho S corporation still owes the $10 Permanent Building Fund tax and files Form 41S. Idaho also offers an affected business entity (ABE) / pass-through entity tax election that can help owners work around the federal SALT cap – worth modeling with your accountant. [current election mechanics and deadlines with the State Tax Commission.]

EIN and state tax accounts

An EIN is required to hire and bank. Register with the Idaho State Tax Commission (TAP) for corporate income tax, employer withholding, and sales tax as applicable.

Idaho incorporation cost breakdown

The full picture before optional services.

Item	Cost (2026) · paid to
Articles of Incorporation	$100 online / $120 paper · Secretary of State (paper adds $20 manual fee)
Annual report	$0 · Secretary of State, anniversary month (free but mandatory)
Expedited processing (optional)	+$40 (expedite) / +$100 (same-day) · Secretary of State
Name reservation (optional)	$20 · 4-month hold
Corporate income tax	Flat 5.3% + $20 min. + $10 PBF · Idaho State Tax Commission
Seller's permit (if selling)	$0 · Idaho State Tax Commission
Registered agent (optional service)	~$49–$300/yr · third party
EIN	$0 · IRS (free)

● Expert view

Insight from our team

Our guidance reflects hands-on filing experience across all 50 states and the District of Columbia, reviewed against current Secretary of State and Department of Revenue requirements.

“Idaho is a genuinely easy state to incorporate in — flat 5.3% on both corporate and personal income, no franchise tax, and a free annual report. For founders choosing between an LLC and a corporation, the compliance cost is nearly identical here, so the decision comes down to how you plan to raise money and issue equity rather than state fees. One practical note: Idaho doesn’t charge more for authorizing extra shares, so we set a clean, investor-ready cap table at formation without worrying about a fee penalty.”

Parth Shah
CountSure

● Keep exploring

Related guides & services

Idaho incorporation Questions

How much does it cost to incorporate in Idaho?

The filing fee is $100 online for Articles of Incorporation ($120 by paper, which includes a $20 manual-processing fee). The annual report that follows is free.

What is Idaho’s corporate income tax rate?

A flat 5.3% for tax years beginning on or after January 1, 2025 (HB 40), the same rate that applies to individual income. Corporations also owe a $20 minimum tax and a $10 Permanent Building Fund tax. Idaho has no franchise tax.

Do Idaho corporations file an annual report?

Yes, and it’s free online through SOSBiz. The report is due by the last day of your incorporation anniversary month each year (Idaho Code § 30-21-213).

How many directors does an Idaho corporation need?

At least one. Director names are not required in the Articles of Incorporation – they’re kept in your corporate records and reported on the annual report.

Does Idaho recognize S-corporation status?

Yes. Idaho honors the federal S-corp election, with income generally passing through to shareholders at the flat 5.3% individual rate.

Get Started

Incorporate in Idaho with CountSure

From Articles of Incorporation and a clean share structure to bylaws, stock, EIN, and your free anniversary-month annual report, CountSure handles Idaho incorporation start to finish.