How to Start a Business in Idaho
Everything you need to form your Idaho LLC, corporation, or sole proprietorship, with exact fees, timelines, and step-by-step instructions.
An Idaho LLC costs $100 to form online. The state imposes no franchise tax, no business license requirement, and taxes business income at a flat 5.3% rate for 2025.
This guide covers every step from selecting a business structure through obtaining the licenses and permits your specific activity requires.
Choosing Your Idaho Business Structure
This is the first decision and it affects everything: taxes, liability, paperwork. If you are unsure, an LLC is the right default for most Idaho small businesses.
| Entity Type | Liability Protection | Taxation | Idaho Filing Fee | Annual Cost | Best For |
|---|---|---|---|---|---|
| LLC | Yes | Pass-through | $100 | $0 Annual Report | Most small businesses |
| Corporation | Yes | Double (C-Corp) or pass-through (S-Corp) | $100 | $0 Annual Report | Raising investment, stock options |
| Sole Proprietorship | No | Pass-through | $0 | $0 | Freelancers, side hustles |
| Partnership | No | Pass-through | $0 | $0 | 2+ owners (consider an LLC instead) |
8 Steps to Start Your Idaho Business
- 1
Choose your business structure
LLC, corporation, or sole proprietorship. Each has different costs, tax treatment, and liability protection.
- 2
Pick and reserve your business name
Search the Idaho Secretary of State database. Reserve for $20 (120 days).
- 3
Appoint a registered agent
Must have a physical Idaho street address. Can be yourself (free) or a service ($100 to $300 per year).
- 4
File your formation documents
Certificate of Organization (Limited Liability Company) ($100) or Articles of Incorporation (General Business) ($100) with the Idaho Secretary of State.
- 5
Get your EIN from the IRS
Free, online, takes about 5 minutes. Do not pay anyone for this.
- 6
Register for a sales tax permit if you sell goods
Through the Idaho State Tax Commission. State sales tax rate: 6%.
- 7
Get required licenses and permits
Business.Idaho.gov states plainly: 'Idaho does not have a state business license.
- 8
Register for Idaho taxes
Personal income tax: Flat 5.3% for 2025. Idaho taxes 0% on the first $4,811 of taxable income for single filers and the first $9,622 for married filers, then...
How Much Does It Cost to Start a Business in Idaho?
| Item | Cost | Notes |
|---|---|---|
| LLC filing fee (Idaho Secretary of State) Required | $100 | The Secretary of State's business forms page states business filings are being processed approximately 7 to 10 days... |
| Corporation filing fee Required | $100 | If forming a corporation instead |
| Annual Report Required | $0 | Each year before the end of the month in which the Certificate of Organization became effective, beginning one year... |
| Name reservation | $20 | 120 days |
| Registered agent service | $0 to $300/yr | Free if you serve as your own |
| EIN (IRS) Required | $0 | Always free |
| Business license | Varies | Business.Idaho.gov states plainly: 'Idaho does not have a state business license. |
| Operating agreement | $0 to $500+ | Free template or attorney-drafted |
| Realistic LLC total (year 1) | $100 to $400 |
Start a Specific Business in Idaho
Idaho Business Guides
- How to Start an LLC in Idaho
- How to Start a Corporation in Idaho
- Sole Proprietorship in Idaho: How to Start One
- Idaho Business License: What You Need and How to Get It
- Idaho Home-Based Business Laws: Zoning, Permits and Rules
- How to Get an EIN in Idaho
- Idaho Business Name Search: How to Check and Reserve a Name
- How to Get a Resale Certificate in Idaho
- Idaho Registered Agent: Requirements and How to Choose One
- Best LLC Services in Idaho
- Idaho Business Taxes Explained for New Owners
- How Much Does It Cost to Start a Business in Idaho
Why Start a Business in Idaho?
- An Idaho LLC Certificate of Organization costs $100 filed online through SOSBiz, or $120 on paper because of a $20 manual data entry surcharge.
- The required annual report carries no filing fee at all, which Idaho Code 30-21-214 lists explicitly as 'No fee'.
- Idaho has no state business license and no franchise tax, so recurring state-level costs for a small LLC can be zero.
- Both individual and corporate income are taxed at a flat 5.3% for 2025, reduced from 5.695% in 2024 and 6.5% in 2021.
- State sales tax is 6%, and a seller's permit is issued through the Idaho Business Registration process in 10 to 15 business days when filed online.
- Idaho's population passed 2 million in 2024 at 2,001,619 residents, and its 2024 current-dollar GDP was $128.1 billion, ranking 38th among the 50 states.
Idaho Business Resources
Frequently Asked Questions
- How long does it take to form an LLC in Idaho?
- Standard filings are processed in 7 to 10 days. If you need faster service, expedited filings are typically processed within 8 business hours, and same-day service is available for requests received by 1:00 p.m. Mountain time.
- What does it cost to start an LLC in year one?
- Your initial LLC filing costs $100. The annual report, due one year after formation, carries no filing fee. Idaho has no state business license requirement.
- Can a non-resident form an Idaho LLC?
- Idaho law does not impose a residency requirement for LLC members. The Secretary of State's formation requirements specify only the business name format and the $100 filing fee.
- What is the cheapest way to start a business in Idaho?
- File an LLC online through SOSBiz for $100. The annual report carries no fee, and Idaho imposes no franchise tax or state business license.
- Is an operating agreement required to form an Idaho LLC?
- Idaho does not require an operating agreement by law. The only filing requirement is the Certificate of Organization, filed with the Secretary of State.