3 Best Foreign Registration Services in Idaho (2026): Prices Tracked
Idaho watchlist, 2026: Mainstay Filing ($199), ID Registered Agent.org ($199) and Idaho Registered Agent.co ($199) lead the foreign registration services, best value first. The registration fee in Idaho is $100 for everyone. Service charges come to $397 to $497 over three years.
Tracked by the Filing Price Watch editorial team
Ordered by:
Ordered by five tracked measures, led by cost at 37% and filings covered at 29%
Idaho price snapshot
Government fee to register$100legislature.idaho.gov (pulled October 2026, noted here)
Year-one prices$199Service fees alone
Years 1 to 3 combined$397 to $497First year plus two renewals
What the state collects in 3 years$100Same whichever service you use
Totals cross inLines stay apartRanking does not flip
Ranked picks
Service prices only. The $100 state fee applies to every service.
#Ordered byPrice in year 1Price at renewalThree-year spend
1
Number one
1. Mainstay Filing: best for the same cost every state
$199 plus the state's fee, then $149 a year
Price in year 1$199
Price after year 1$149/yr
Three-year spend$497
Mainstay Filing comes out on top. $199 to file, nothing for the agent in year one, and one price in all states.
Three years cost $100 more here than at ID Registered Agent.org, but the added filings it covers count for more in the order.
Agent renewal in any state: $149 per year.
Price covers
Foreign registration of the LLC
Registered agent is free in year one
The same fee in every state
Holds up
The fee does not change by state
$199 on top of the state's fee
The first agent year is paid
Weak spots
ID Registered Agent.org charges $50 less for the agent
2
Home-state provider
2. ID Registered Agent.org: best for a basic registration
$199 plus the state's fee, then $99 a year
Price in year 1$199
Price after year 1$99/yr
Three-year spend$397
Spot 2 goes to ID Registered Agent.org: $199 on top of the state fee, with the first agent year included, followed by $99 each year.
Price covers
Registration handled for you
A year of agent service to begin with
Holds up
Agent renews at $99
First agent year included
Starts at $199
Weak spots
Nothing outside this state
3
Home-state provider
3. Idaho Registered Agent.co: best for a nearby provider
$199 plus the state's fee, then $99 a year
Price in year 1$199
Price after year 1$99/yr
Three-year spend$397
Spot 3 goes to Idaho Registered Agent.co: $199 on top of the state fee, with the first agent year included, followed by $99 each year.
ID Registered Agent.org lists exactly the same prices.
For the state side of three years we add up the filing fee, the report charged in years two and three and a yearly minimum tax if the state has one. Publication requirements and other open-ended costs are noted in the text, not totaled.
Why this order for Idaho
On filings covered by the price, which is worth 29%, Mainstay Filing did better than ID Registered Agent.org.
Since the LLC lives in two states, coverage settled it.
Idaho foreign LLC registration fee and rules, as written by the state
Out-of-state LLCs file the Foreign Registration Statement with the Idaho Secretary of State, Business Services and pay $100. Send along certificate of existence (certificate of good standing) from the home state not older than 90 days.
What staying unregistered can cost: Idaho courts refusing its claims (Idaho Code 30-21-502(b)).