3 Best Foreign Registration Services in Idaho (2026): Who to Hire
The foreign registration services to hire in Idaho in 2026 are Mainstay Filing ($199), ID Registered Agent.org ($199) and Idaho Registered Agent.co ($199), in that order. Each pick pays Idaho's $100; three years of service run $397 to $497.
By the LLC Answered editorial team
Answer in four lines
Short reply
Price to register
$100
Attach a certificate?
Yes, it is required (90 days maximum age)
Later filing
No fee, annual report
Hire in this order
Mainstay Filing, ID Registered Agent.org then Idaho Registered Agent.co
Idaho: our answer
Prices are from each company's own pricing. See how we decide.
#1First choice
1. Mainstay Filing: best for LLCs adding more states
$199 to register, $149 for the agent after
Mainstay Filing comes first, as $199 on top of the state fee gets you registered, with the registered agent free in year one and $149 a year afterward.
Is it the smaller bill? No. ID Registered Agent.org costs $100 less over three years, but it works in Idaho only.
After the free year, the registered agent renews at $149.
What is bundled
Your foreign filing
Registered agent, covered the first year
No change in price by state
Pluses
Fifty states covered
Service fee $199
Agent service is free for the first year
Downsides
$50 a year more for the agent
#2In-state option
2. ID Registered Agent.org: best for one extra state
$199 to register, $99 for the agent after
Second place: ID Registered Agent.org, where $199 above the state fee at the start, and $99 yearly after that.
What is bundled
Registration handled
Agent for year one
Pluses
$199 over the state fee
Year one of agent service is part of the price
Then $99 yearly
Downsides
One-state service
#3In-state option
3. Idaho Registered Agent.co: best for another local choice
$199 to register, $99 for the agent after
Third place: Idaho Registered Agent.co, where $199 above the state fee at the start, and $99 yearly after that.
The same published prices as ID Registered Agent.org, so choose whichever you prefer.
What is bundled
Registration handled
Agent for year one
Pluses
$199 over the state fee
Year one of agent service is part of the price
Then $99 yearly
Downsides
One-state service
The table
#
Service
First year
Later years
3-year cost
Price buys
1
Mainstay Filing
$199
$149/yr
$497
your foreign filing; registered agent, covered the first year; no change in price by state
To get the three-year number we add the formation filing, two later reports and any minimum tax, and we do not count costs without a fixed price.
Other questions
Do both states require an agent?
Each state applies its own rule, so your home state still needs an agent. A provider active in every state, such as Mainstay Filing, covers both.
How do the three-year totals compare?
Three-year costs are Mainstay Filing, $497; ID Registered Agent.org, $397; Idaho Registered Agent.co, $397, with state fees on top.
How do you know these fees?
Official Idaho documents supply the state fees, and the companies' own price pages supply the service fees. Every figure carries a date.
Can I skip hiring one?
No. What you pay a service covers the labor and the agent role, not anything the state demands.
Who submits the registration?
Yes, filing is part of what each of these companies sells, and the state fee is a constant.
Which one do you pick in Idaho?
Mainstay Filing leads because the $199 fee is identical everywhere, and the first year of registered agent service comes with it; ID Registered Agent.org and Idaho Registered Agent.co come next.