3 Best Foreign Registration Services in Idaho (2026)
LLC Review Desk's 2026 picks for foreign registration services in Idaho, favorite first, are Idaho Registered Agent.co ($199), Mainstay Filing ($199) and ID Registered Agent.org ($199). Idaho Registered Agent.co is our favorite, because it's $199 plus the state fee, with your first registered agent year included, then $99 a year for the agent.
By the LLC Review Desk editorial team
Position 1
Our top pick in Idaho
1. Idaho Registered Agent.co: best for companies adding only Idaho
You pay $199 plus the state fee, then $99 a year for the agent
Our score
9.6out of 10
9.6 out of 10
Our favorite is Idaho Registered Agent.co, because registering in Idaho costs $199 and covers year one as your agent, then $99 a year.
You get a street address in the state for your registered office, and any papers served on the company are scanned into your online account.
You pay less over three years than with Mainstay Filing.
In the price
The registration filing
A year of registered agent service at the outset
What we like
Then $99 a year to keep the agent
Year-one registered agent service is covered
Registers the company for $199, with the state fee on top
LLC Review Desk gives each score out of 10 itself, based on the criteria on How we rank. No customer ratings are involved.
What Idaho foreign registration services cost in 2026: year one, renewals and three years
Service
First year
Second year
Third year
Three-year total
Agent covered in year one
Idaho Registered Agent.co
$199
$99
$99
$397
Included
Mainstay Filing
$199
$149
$149
$497
Free
ID Registered Agent.org
$199
$99
$99
$397
Included
We took each price from the company's own pages on November 12, 2026. On top of every row, Idaho charges a $100 registration fee, which isn't in these totals.
Why we ordered them this way
Here's how we scored it: three-year cost and filings in the price are worth 29% each, and renewal price, state fit and up-front totals split the other 42%. In Idaho, three-year cost made the difference.
Idaho Registered Agent.co comes to $397 over three years, which is $100 less than Mainstay Filing. Both include the first year, so the renewal price decided it.
You can read every criterion and weight on How we rank.
Registering a foreign LLC in Idaho: fee, form and who to send it to
You register through the Idaho Secretary of State, Business Services, using the Foreign Registration Statement. The state charges $100. Idaho also wants certificate of existence (certificate of good standing) from the home state that is no more than 90 days old.
After that, plan on the annual report each cycle by before the end of the month in which the LLC registered.
Get these ready first
Certificate of existence (certificate of good standing) from the home state, issued within 90 days of when you file.
Your company's full legal name, exactly as registered at home, and the date it was formed there.
A registered agent with a street address in the state. Any service on this page can do it.
The $100 state fee to pay with the filing.
A reminder for yourself about the annual report.
What happens if you skip Idaho registration
Until it registers, an out-of-state LLC can't sue in Idaho courts (Idaho Code 30-21-502(b)). Its contracts still stand (Idaho Code 30-21-502(c)).
Your questions about Idaho foreign registration services
Do I have to register my out-of-state LLC in Idaho?
If it does business there, yes. Until it registers, it can't sue in the state's courts.
What does registering a foreign LLC in Idaho come to?
The state charges $100, and services charge $199.
Does Idaho want paperwork from my home state?
It does: certificate of existence (certificate of good standing) from the home state, no more than 90 days old.
Do I still need a registered agent after I register?
Yes. You keep a registered agent with a street address in the state as long as the company stays registered.
Which foreign registration services did we review here?
Idaho Registered Agent.co ($199), Mainstay Filing ($199) and ID Registered Agent.org ($199), with our favorite first.
Who's the best choice for foreign registration in Idaho?
Idaho Registered Agent.co, because $199 beyond the state fee gets you registered in Idaho, and the agent renews at $99.