How to Start an LLC in Idaho (2026)
Idaho forms a new LLC when the Secretary of State files your Certificate of Organization. It costs $100 online through SOSBiz or $120 by mail. Idaho also expects a free Annual Report every year to keep your LLC in good standing.
This guide walks a first-time Idaho founder through forming a new domestic LLC. You'll pick a legal name, appoint a registered agent and file the certificate. A quick FAQ near the end covers how an out-of-state LLC registers to do business here instead.
Quick Summary
- Confirm your name is available before you file. A rejected Certificate of Organization means filing again and paying the state filing fee again.
- Weigh serving as your own registered agent. It saves money, but your address stays on file with the state.
- Mark your Annual Report month on a calendar now. A missed report can get your LLC dissolved by the state.
Idaho LLC Requirements at a Glance
Here's the current Idaho LLC filing picture in one place, pulled straight from the Secretary of State's own forms and fee schedule.
| LLC requirement | State-specific answer |
|---|---|
| Filing document | Certificate of Organization (Limited Liability Company), Title 30, Chapters 21 and 25, Idaho Code |
| Filing authority | Idaho Secretary of State, Business Services Division |
| State filing fee | $100 online (SOSBiz) / $120 by mail or in person ($100 base + $20 manual processing fee) |
| Online filing | Yes, SOSBiz |
| Processing time | Not published as a fixed day-count. The agency posts a live estimate that updates with filing volume |
| Registered agent | A physical Idaho street address is required, no P.O. boxes. An Idaho resident or an authorized business entity may serve as agent |
| Annual report | Due each year before the end of the anniversary month, starting the year after formation. Free online. Paper filing carries a manual-processing fee |
| Publication required? | No. None of the Secretary of State's business-formation pages mention a publication requirement for domestic LLCs |
| State business tax | Default LLCs are pass-through entities. Owners report profits on their individual Idaho returns, and Idaho has no separate LLC franchise or privilege tax |
| Last verified | September 3, 2026 |
How to Start an LLC in Idaho: 5 Steps
Idaho's LLC Act lays out what your Certificate of Organization must include. These five steps get you there in the right order.
Step 1: Choose and check your LLC name
Your name has to include "Limited Liability Company," "Limited Company," or an abbreviation like "LLC" or "L.C." It also has to be different from every name already on file with the Idaho Secretary of State.
Run your choice through the Business Search tool at SOSBiz before you file. A name conflict means filing the certificate again and paying the fee again. If you're not ready to file yet, you can reserve the name for four months instead.
Step 2: Appoint a registered agent
Your registered agent needs a physical street address inside Idaho. A P.O. box doesn't qualify. You can serve as your own agent if you live in Idaho, or hire an Idaho business entity allowed to act as one.
You can also bring in a registered agent service in Idaho instead. Serving as your own agent puts your home address on the public record the moment Idaho files your certificate. Naming anyone else as agent counts as their consent to serve.
Step 3: File the Certificate of Organization with the Idaho Secretary of State
This is the filing that creates your LLC. Our how to start an LLC overview covers the general pattern behind it, though Idaho has its own form name and fee.
The next section covers what goes on the form, what it costs and how to submit it. Here's the short version: file online through SOSBiz, or mail a paper form to the Secretary of State's office in Boise.
Step 4: Create an operating agreement
Idaho leaves the operating agreement optional, and yours can even be oral or implied under state law. Without a written agreement, Idaho's own default rules step in to govern how your LLC runs.
Step 5: Get an EIN
Getting an EIN costs nothing through irs.gov. An approved online application returns the number right away. Form your LLC with the state first, since applying too early can delay the EIN application.
Filing the Certificate of Organization in Idaho: What to Expect
Here's what actually happens when you sit down to file, from the fields on the form to the address you mail it to.
1. What the form asks for
The Certificate of Organization asks for six things. Your LLC's name comes first, then the street and mailing address of your principal office. Next comes your registered agent's name and Idaho street address.
You also list the name and address of at least one "governor," plus a mailing address for future Annual Report notices. Idaho uses "governor" as a catch-all term for either a member in a member-managed LLC or a manager in a manager-managed one.
You don't have to say which role that person holds. At least one organizer has to sign, though the form leaves room for more than one signature.
2. Fee and payment methods
Filing online through SOSBiz costs $100. Mailing or hand-delivering a paper form costs $120, the same $100 base fee plus a $20 manual-processing charge for anything that isn't submitted online. If you mail your certificate, make the check payable to the Idaho Secretary of State.
3. Processing times
Processing times in Idaho aren't published as a fixed number of days for online or mailed filings. The wait depends on how many filings the office has waiting. SOSBiz posts a live estimate that changes with that count.
If you need to skip the line, expedited service takes about 8 business hours for an extra $40. Same-day service is available for an extra $100 if your request arrives by 1 p.m. Mountain Time.
| Filing method | Processing time |
|---|---|
| Online | No fixed turnaround published online. A live SOSBiz estimate updates as filing volume changes |
| No separate mail turnaround published. Mailed filings enter the same volume-based queue as online filings | |
| In person | Not a faster default channel. In-person filings join the same queue unless expedited or same-day service is paid for |
| Expedited | About 8 business hours for expedited service (+$40). Same-day service (+$100) needs the request by 1 p.m. Mountain Time |
| Current state estimate | Not on a static page. SOSBiz runs a live "Processed Through Date" tracker that updates with filing volume |
4. Where to file by mail or in person
Mail your certificate, or drop it off in person, at the Office of the Secretary of State, 450 N 4th Street, PO Box 83720, Boise, ID 83720-0080. Call (208) 334-2301 if you have questions before you send it.
5. Common reasons filings are rejected
The Secretary of State doesn't publish a list of common rejection reasons for this filing. A few checks based on what the form needs can still help you avoid a bounce.
Double check your name against the Business Search tool first. Then confirm your registered agent has agreed to serve, and make sure at least one organizer has signed before you send it in.
6. What you receive when it is approved
Your approved certificate becomes available in your own SOSBiz account instead of arriving by mail. Once your filing clears, you can view or download it under your business filings whenever you want.
If you need formal proof of good standing later, for a bank or another state, you can request a Certificate of Existence for $10.
What It Costs to Start an LLC in Idaho
A few optional costs can add to your total beyond the mandatory state filing fee. These depend on what you choose, from reserving your name early to paying extra for faster handling.
| Cost item | Amount |
|---|---|
| State filing fee | $100 online (SOSBiz) / $120 by mail or in person ($100 base + $20 manual processing fee) |
| Name reservation | $20 online / $40 by mail or in person ($20 base + $20 manual processing fee); reserves the name for 4 months |
| Registered agent | $0 if a member, manager or Idaho resident serves as agent. The state does not publish a commercial-agent price |
| Certified copy | $10 (Certificate of Existence) |
| Expedited filing | About 8 business hours for expedited service (+$40). Same-day service (+$100) needs the request by 1 p.m. Mountain Time |
| Annual report | Due each year before the end of the anniversary month, starting the year after formation. Free online. Paper filing carries a manual-processing fee |
| Other mandatory state fees | None. No separate initial-report, business-privilege-tax or publication fee applies to a domestic Idaho LLC |
Only the Certificate of Organization fee is mandatory. Name reservation, a registered agent service, a certified copy and faster handling are all optional. You can skip every one of them and still form a valid Idaho LLC.
Idaho-Specific Rules That Change the Process
1. Naming restrictions and restricted words
When the state checks whether your name is too close to one already on file, it ignores the ending words themselves [1]. So "Smith Consulting LLC" and "Smith Consulting L.C." can still count as the same name.
Idaho also bans a name that falsely implies a government connection. The same rule blocks a name that claims a purpose your LLC isn't legally allowed to pursue.
2. Professional LLC rules
Say you're licensed in a field like law, medicine, engineering or accounting. You'd file a Certificate of Organization for a Professional Limited Liability Company instead of the standard version.
The certificate has to state that the company is a PLLC. It also has to name the profession its members are licensed to practice.
3. Member and manager disclosure
Whether your LLC is member-managed or manager-managed is your own call under Idaho law. The Certificate of Organization only needs your governor's name and address.
Business registrations are public records in Idaho, so that governor's name and address become searchable once your certificate is on file.
4. No publication rule
Unlike New York, Idaho doesn't make you announce your new LLC in a newspaper. None of the Secretary of State's business-formation pages mention a publication step, so once your certificate is filed, that part is done.
5. Foreign LLC registration
An out-of-state LLC that wants to do business in Idaho files a Foreign Registration Statement instead of the standard form. Idaho charges the same fee either way.
6. Reinstatement after administrative dissolution
Miss your Annual Report, and Idaho can dissolve your LLC 60 days after mailing you notice of the problem [2].
You can apply for reinstatement within 10 years of that dissolution date through SOSBiz. Reinstating also means paying every fee, tax and penalty that piled up while your LLC was dissolved.
What to Do After Your Idaho LLC Is Approved
Your Certificate of Organization is just the start. Here's what comes next once the state has your filing on record.
1. Open a business bank account
Banks typically ask to see your filed Certificate of Organization and your EIN. They want that proof before they'll open a business account for your LLC.
2. Register for state tax accounts
If you sell taxable goods or services, register for a seller's permit. If you hire anyone, register for withholding and unemployment insurance too. All of this runs through the Idaho Business Registration process with the Idaho State Tax Commission.
3. Check whether you need a license
A general state business license doesn't exist in Idaho. Registering with the Secretary of State is your only business registration. A licensing board may still want its own license based on your line of work. Your city or county may want one too.
4. Keep up with ongoing compliance
Your main ongoing job is filing the Annual Report every year before your anniversary month ends. Keep your registered agent and business address current with the Secretary of State too. Missing the deadline can get your LLC dissolved, as covered earlier.
| Compliance item | Deadline, fee and department |
|---|---|
| Initial report | None required. Idaho's LLC Act requires only the Certificate of Organization at formation and an Annual Report starting the next year |
| Annual or biennial report | Due each year before the end of the anniversary month, starting one year after formation. Free online. Paper filing carries a manual-processing fee |
| State tax registration | Register through the Idaho Business Registration process with the Idaho State Tax Commission for a seller's permit, withholding or unemployment insurance as needed |
| Renewal deadline | Not applicable. Idaho has no general state business license to renew. Local or occupational licenses may still apply |
| Late fee | No monetary late fee published. A late Annual Report is grounds for administrative dissolution 60 days after notice |
| Responsible state department | Idaho Secretary of State, Business Services Division (filings and Annual Report); Idaho State Tax Commission (tax account registration) |
FAQs
Can I Be My Own Registered Agent in Idaho?
Yes, you can be your own registered agent in Idaho if you have a physical street address in the state. You must be there during normal business hours, and a P.O. box doesn't qualify. That address is searchable once you're listed.
Can a Nonresident Form an LLC in Idaho?
Yes, a nonresident can form an LLC in Idaho without living in the state or the country. The only Idaho-residency requirement applies to your registered agent, who needs a physical street address here.
Can I Use My Home Address for an Idaho LLC?
Yes, you can use your home address for an Idaho LLC as your principal office. Using it as your registered agent address puts it on file the same way.
Can I Move an Existing LLC Into Idaho?
Yes, you can move an existing LLC into Idaho by registering it as a foreign LLC rather than forming a brand-new entity. That keeps your original formation date and history intact while adding Idaho as a place you're allowed to do business.
References:
- https://legislature.idaho.gov/statutesrules/idstat/title30/t30ch25/
- https://legislature.idaho.gov/statutesrules/idstat/title30/t30ch21/sect30-21-602/
