Place1
Best hereID Registered Agent.org
1. ID Registered Agent.org: best for a low yearly agent cost
$199 plus the state fee; agent $99 a year from year two
Our mark9.4out of 10
ID Registered Agent.org takes the top spot: a $199 service fee for the Idaho registration and a $99 agent renewal.
The plan covers an in-state street address for your registered office, with legal documents scanned and sent to you online.
On our method the lower three-year cost outweighs what Mainstay adds to its price.
What you get
- Filing with the state
- A year of registered agent service
Why pick it
- Then $99 a year
- A year of registered agent service included
- $199 plus the state's fee
Less good
- Focused on Idaho; your home state needs its own agent
- EIN help is $99
Place2
Best local optionIdaho Registered Agent.co
2. Idaho Registered Agent.co: best for registering only in Idaho
$199 plus the state fee; agent $99 a year from year two
Our mark9.2out of 10
Number 2 is Idaho Registered Agent.co: a $199 service fee for the Idaho registration and a $99 agent renewal.
The plan covers an in-state street address for your registered office, with legal documents scanned and sent to you online.
ID Registered Agent.org and Idaho Registered Agent.co publish the same prices and the same plan features, so the gap between them is small and either is a sound choice.
What you get
- Filing with the state
- A year of registered agent service
Why pick it
- A year of registered agent service included
- $199 plus the state's fee
- Then $99 a year
Less good
- Focused on Idaho; your home state needs its own agent
- EIN help is $99
Place3
Best for expanding companiesMainstay Filing
3. Mainstay Filing: best for companies registered in several states
$199 plus the state fee ($299 due today); agent $149 a year from year two
Our mark9.1out of 10
Mainstay Filing comes third with $199 over the state fee, the first registered agent year included, then $149 a year.
From year two the agent costs $149 a year, the same in every state.
It costs $100 more than ID Registered Agent.org over three years, which is why it sits below it on our cost score.
What you get
- Registration prepared and filed
- Your registered agent, free for the first year
- Service of process scanned the same business day, no fee
Why pick it
- Registered agent free for the first year
- Works in all fifty states
- Service of process scanned the same business day, no fee
- $199 plus Idaho's filing fee
Less good
- $149 agent renewal, $50 above ID Registered Agent.org
The 3 picks side by side
| Rank | Service | Our score | Service fee | Year two | Best for | Link |
|---|
| 1 | ID Registered Agent.org | 9.4 | $199 | $99/yr | Lowest agent renewal on this list | Visit ID Registered Agent.orgPartner link. We may earn money if you buy. |
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| 2 | Idaho Registered Agent.co | 9.2 | $199 | $99/yr | Lowest agent renewal on this list | Visit Idaho Registered Agent.coPartner link. We may earn money if you buy. |
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| 3 | Mainstay Filing | 9.1 | $199 | $149/yr | Companies registered in several states | Visit Mainstay FilingPartner link. We may earn money if you buy. |
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Editorial scores out of 10 from The Founders Review, using the criteria explained on How we rank. No customer ratings are involved.
Idaho foreign registration service pricing (2026): annual price, renewal price and three-year total
| Service | Year one | Year two | Year three | Three-year total | Agent in year one |
|---|
| ID Registered Agent.org | $199 | $99 | $99 | $397 | Included |
|---|
| Idaho Registered Agent.co | $199 | $99 | $99 | $397 | Included |
|---|
| Mainstay Filing | $199 | $149 | $149 | $497 | Free |
|---|
We read these prices on the companies' own sites on November 12, 2026. Every service adds the $100 state fee, so it is left out above.
What decided the ranking
The Founders Review weighs five things, led by three-year cost and what one price covers at 30% each. For Idaho, three-year cost is what separated first place from second.
ID Registered Agent.org's three-year total is $397 ($100 below Mainstay Filing). With the first agent year included by both, the renewal settled it.
Read the full criteria on our How we rank page.
The filing, step by step
The Idaho Secretary of State, Business Services takes the Foreign Registration Statement and a $100 state fee. Idaho also wants certificate of existence (certificate of good standing) from the home state, dated within 90 days.
After registering, the company files the annual report, due before the end of the month in which the LLC registered.
Before you file
- Certificate of existence (certificate of good standing) from the home state, issued no more than 90 days before you file.
- Legal name and formation date from the home state.
- Someone to serve as your registered agent there; every service here does.
- The $100 state fee, paid with the filing.
- A date in your calendar for the annual report.
Penalties for not registering in Idaho
An unregistered foreign LLC cannot bring a lawsuit in the state's courts until it registers (Idaho Code 30-21-502(b)). Its contracts stay valid (Idaho Code 30-21-502(c)).
What Idaho founders ask
Do I need to register my out-of-state LLC in Idaho?
Yes, if the company transacts business there. Until it registers it cannot bring a lawsuit in the state's courts.
How much does foreign registration cost in Idaho?
The state charges $100; our picks add $199.
Do I need a certificate from my home state?
Yes: certificate of existence (certificate of good standing) from the home state, dated within 90 days of filing.
Do I need a registered agent after registering?
Yes. Every LLC must name a registered agent with an in-state street address.
Which foreign registration services do you rank here?
ID Registered Agent.org ($199), Idaho Registered Agent.co ($199) and Mainstay Filing ($199), in the order shown.
Which foreign registration service is best in Idaho?
ID Registered Agent.org ranks first on our method: Idaho registration at $199 plus state fees, agent included for year one.
Sources we used
- October 2026 check of Idaho yearly filing: Annual report: due date, official source: legislature.idaho.gov/statutesrules/idstat/title30/t30ch21/sect30-21-2
- August 2026 check of Idaho Code § 30-25-201: legislature.idaho.gov/statutesrules/idstat/Title30/T30CH25/SECT30-25-2
- October 2026 check of Idaho formation fee: Filing fee, official source: sos.idaho.gov/business-forms
- October 2026 check of Idaho formation fee: Filing fee, official source: legislature.idaho.gov/statutesrules/idstat/Title30/T30CH21/SECT30-21-2
- October 2026 check of Idaho registered agent statute: legislature.idaho.gov/statutesrules/idstat/Title30/T30CH21/SECT30-21-4
- October 2026 check of Idaho Secretary of State, Foreign Registration Statement: archive.sos.idaho.gov/CORP/forms/FOREIGN/Foreign%20Reg%20Statement.pdf
- October 2026 check of Idaho Secretary of State, business FAQ: sos.idaho.gov/business-resources/business-faq
- October 2026 check of Idaho Code 30-21-505, activities that are not doing business: legislature.idaho.gov/statutesrules/idstat/Title30/T30CH21/SECT30-21-5
- October 2026 check of Idaho Code 30-21-213, annual report: legislature.idaho.gov/statutesrules/idstat/Title30/T30CH21/SECT30-21-2
- October 2026 check of Withdrawal of Foreign Registration Statement: archive.sos.idaho.gov/CORP/forms/FOREIGN/Foreign%20Withdrawal.pdf
- November 2026 check of Idaho Code 30-21-502, registration to do business: legislature.idaho.gov/statutesrules/idstat/Title30/T30CH21/SECT30-21-5
- ID Registered Agent.org: pricing and service pages, read November 12, 2026
- Idaho Registered Agent.co: pricing and service pages, read November 12, 2026
- Mainstay Filing: Idaho service page, read November 12, 2026