Explained · Idaho
3 Best Foreign Registration Services in Idaho (2026) for Owners
The essentials
- State charge to register
- $100
- Do you attach a home-state certificate?
- Required (90 days old, no more)
- Later filings
- No state fee, annual report
- Services we suggest
- Idaho Registered Agent.co, ID Registered Agent.org then Mainstay Filing
Who we recommend in Idaho
The order comes from our method: three-year cost first, then how much work the price covers.1. Idaho Registered Agent.co: best for a lean registration
$199 plus the state fee, then $99 yearly
The reason Idaho Registered Agent.co leads here is that three years of service fees come to $397.
Of the two, it has the lower three-year cost, and that is the first thing we weigh.
Includes
- The foreign filing, submitted
- No agent charge in year one
Points in its favor
- A service fee of $199
- Includes a first year of agent service
- $99 annually after that
Where it falls short
- Your home state requires a second provider
2. ID Registered Agent.org: best for a one-state add-on
$199 plus the state fee, then $99 yearly
In second place is ID Registered Agent.org, because three years of service fees come to $397.
Price for price, it matches Idaho Registered Agent.co.
Includes
- The foreign filing, submitted
- No agent charge in year one
Points in its favor
- $99 annually after that
- Includes a first year of agent service
- A service fee of $199
Where it falls short
- Your home state requires a second provider
3. Mainstay Filing: best for adding several states
$199 plus the state fee, then $149 yearly
Mainstay Filing ranks third. In short, registering costs $199 plus state fees, and the registered agent is free the first year.
Across three years it is $100 pricier than Idaho Registered Agent.co.
Year one has no registered agent charge. From year two it is $149 a year.
Includes
- The registration filing
- Registered agent, no charge in the first year
- One price across the country
Points in its favor
- The price does not change by state
- $199 on top of the state fee
- No agent fee in the first year
Where it falls short
- Agent costs $50 more each year
The picks compared
| # | Pick | First-year price | Renewal price | Total, 3 years | Covers | |
|---|---|---|---|---|---|---|
| 1 | Idaho Registered Agent.co | $199 | $99/yr | $397 | the foreign filing, submitted; no agent charge in year one | Open Idaho Registered Agent.coPartner link. We may earn money if you buy. |
| 2 | ID Registered Agent.org | $199 | $99/yr | $397 | the foreign filing, submitted; no agent charge in year one | Open ID Registered Agent.orgPartner link. We may earn money if you buy. |
| 3 | Mainstay Filing | $199 | $149/yr | $497 | the registration filing; registered agent, no charge in the first year; one price across the country | Open Mainstay FilingPartner link. We may earn money if you buy. |
The questions, one by one
Who needs to register in this state?
If an LLC formed in another state wants to do business in Idaho, it registers beforehand.
An unregistered LLC may face it cannot sue as a plaintiff (Idaho Code 30-21-502(b)).
see archive.sos.idaho.gov, October 2026
What are the fees to register?
$100 in state fees, plus $199 for a service.
State fees over three years, registration included: $100. see legislature.idaho.gov, October 2026
Which document registers the LLC?
You file the Foreign Registration Statement with the Idaho Secretary of State, Business Services, and that is all.
Send certificate of existence (certificate of good standing) from the home state no more than 90 days.
What does it cost to stay registered?
Annual report: no fee.
Filings come due Before the end of the month in which the LLC registered.
What put number one on top?
What three years cost counts for 34%, and Idaho Registered Agent.co comes out ahead on it.
The two heaviest criteria are what three years cost (34%) and how much work the price handles (28%), with three lighter ones behind them.
Picking Idaho Registered Agent.co leaves $100 in your pocket after three years compared with Mainstay Filing.
What Idaho requires
| Item | Detail | Reference |
|---|---|---|
| State registration fee | $100 | see legislature.idaho.gov, October 2026 |
| Document from home state | Required, 90 days | see archive.sos.idaho.gov, October 2026 |
| State fees across three years | $100 | The rows above, added |
Additional questions
Will one agent cover both states?
Yes. Your home state still requires its own agent, and Mainstay Filing can cover both states under one account.
What does each pick cost across three years?
Idaho Registered Agent.co: $397 | ID Registered Agent.org: $397 | Mainstay Filing: $497, not counting state fees.
What are your sources?
Official schedules for state fees, company pricing for service fees, and every figure carries a date.
Do I have to hire a service?
It is optional, and the state charges the same either way.
Can someone else submit the registration?
Any of them can file it for you, with the state fee unchanged.
What is the best foreign registration service for Idaho?
Idaho Registered Agent.co is on top because you pay $199 above the state fee, and $99 every year after; ID Registered Agent.org and Mainstay Filing follow.
Sources used on this page
- Reference: Idaho yearly filing: Annual report at legislature.idaho.gov, checked in October 2026
- Reference: Idaho Code § 30-25-201 at legislature.idaho.gov, checked in August 2026
- Reference: Idaho formation fee: Filing fee at sos.idaho.gov, checked in October 2026
- Reference: Idaho formation fee: Filing fee at legislature.idaho.gov, checked in October 2026
- Reference: Idaho registered agent statute at legislature.idaho.gov, checked in October 2026
- Reference: Idaho Secretary of State, Foreign at archive.sos.idaho.gov, checked in October 2026
- Reference: Idaho Secretary of State, business at sos.idaho.gov, checked in October 2026
- Reference: Idaho Code 30-21-505, activities that at legislature.idaho.gov, checked in October 2026
- Reference: Idaho Code 30-21-213, annual report at legislature.idaho.gov, checked in October 2026
- Reference: Withdrawal of Foreign Registration Statement at archive.sos.idaho.gov, checked in October 2026
- Reference: Idaho Code 30-21-502, registration to at legislature.idaho.gov, checked in November 2026
- Idaho Registered Agent.co, pricing page, accessed November 13, 2026
- ID Registered Agent.org, pricing page, accessed November 13, 2026
- Mainstay Filing, Idaho service page, accessed November 13, 2026