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The Formation Desk

Rankings of registered agents, LLC formation and foreign registration services in all 50 states.

Foreign registration picks · Idaho

3 Best Foreign Registration Services in Idaho (2026)

The The Formation Desk call for foreign registration services in Idaho in 2026: Idaho Registered Agent.co ($199), ID Registered Agent.org ($199) and Mainstay Filing ($199), in that order. Idaho Registered Agent.co takes the call: $199 plus the state fee, one year of registered agent service included, then $99 a year for the agent.
Written by The Formation Desk editorial team
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Our top pick

1. Idaho Registered Agent.co: best for adding only Idaho

$199 for the service, state fee on top; agent $99 a year after year one

Editorial score 9.1 out of 10

The desk picks Idaho Registered Agent.co: the Idaho registration for $199, first agent year included, then $99 yearly.

You get an in-state street address as the registered office, and papers served there are scanned into your account.

It wins the three-year cost comparison with Mainstay Filing.

In the price

  • Foreign registration done for you
  • A first year of registered agent service

Strengths

  • Year-one registered agent service is in the price
  • $199 to register, state fee extra
  • Year-two agent price: $99

Cons

  • Idaho only; your home state needs its own agent
  • EIN application will cost you $99 more
Visit Idaho Registered Agent.coPartner link. We may earn money if you buy. Idaho Registered Agent.co up close
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Best value here

2. ID Registered Agent.org: best for Idaho registrations only

$199 for the service, state fee on top; agent $99 a year after year one

Editorial score 8.7 out of 10

Runner-up, ID Registered Agent.org: the Idaho registration for $199, first agent year included, then $99 yearly.

You get an in-state street address as the registered office, and papers served there are scanned into your account.

On price and features there is nothing between Idaho Registered Agent.co and ID Registered Agent.org, which makes the order a close call.

In the price

  • Foreign registration done for you
  • A first year of registered agent service

Strengths

  • $199 service fee, then the state fee
  • Includes a first year as your registered agent
  • $99 yearly to keep the agent

Cons

  • Idaho only; your home state needs its own agent
  • EIN application will cost you $99 more
Visit ID Registered Agent.orgPartner link. We may earn money if you buy. ID Registered Agent.org up close
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One price, any state

3. Mainstay Filing: best for companies working in more than one state

A $199 service fee plus state fees ($299 today), then $149 a year for the agent

Editorial score 8.6 out of 10

Third, Mainstay Filing: $199 plus the state's own fee, the registered agent free for year one and the same price in every state.

After a free first year, expect $149 a year for the agent, in this state or any other.

Idaho Registered Agent.co undercuts Mainstay Filing by $100 over three years, and that is why Mainstay sits lower on cost.

In the price

  • The registration, prepared and filed for you
  • A free registered agent for the first year
  • Same-business-day upload of scanned service of process, no fee

Strengths

  • Same price in all fifty states
  • Registered agent costs nothing in year one
  • Free scans of served papers on the same business day
  • $199 service fee, state fee on top

Cons

  • Agent renewal of $149 is $50 above Idaho Registered Agent.co
Visit Mainstay FilingPartner link. We may earn money if you buy. Mainstay Filing up close

The desk's 3 picks in brief

Pick Service Desk score Service fee Year two Good for Visit
1 Idaho Registered Agent.co 9.1 $199 $99/yr The lowest agent renewal we rank here Visit Idaho Registered Agent.coPartner link. We may earn money if you buy.
2 ID Registered Agent.org 8.7 $199 $99/yr The lowest agent renewal we rank here Visit ID Registered Agent.orgPartner link. We may earn money if you buy.
3 Mainstay Filing 8.6 $199 $149/yr Companies doing business in several states Visit Mainstay FilingPartner link. We may earn money if you buy.

Our editors assign each score out of 10 using the criteria on How we rank. Customer ratings play no part.

What a Idaho foreign registration service costs in 2026: year one, renewal and the three-year bill

Service Year one Year two Year three Bill over three years Agent covered in year one
Idaho Registered Agent.co $199 $99 $99 $397 Included
ID Registered Agent.org $199 $99 $99 $397 Included
Mainstay Filing $199 $149 $149 $497 Free

Every price here was read off the company's own pages on November 12, 2026. Idaho's $100 registration fee comes on top of every row and is left out of these totals.

Why it falls this way

Spend over three years made the call in Idaho. The desk weighs spend over three years and work the price removes at 33% each and gives what renewal looks like, fit with the state and plain price display the remaining 34%.

Idaho Registered Agent.co comes to $397 over three years, $100 less than Mainstay Filing. Both include a first year of agent service, so the renewal price made the call.

The full criteria and weights are on How we rank.

Registering a foreign LLC in Idaho: fee, form and who gets it

To register, the company files the Foreign Registration Statement with the Idaho Secretary of State, Business Services and pays the state's $100. Idaho also wants certificate of existence (certificate of good standing) from the home state, issued within 90 days of the filing.

From then on the company owes the annual report, due before the end of the month in which the LLC registered.

What to pull together first

  • Certificate of existence (certificate of good standing) from the home state, issued in the 90 days before you file.
  • The company name exactly as the home state spells it, and when it was formed.
  • An in-state registered agent; any service the desk picked can fill that seat.
  • $100 for the state, paid when you file.
  • A date on your calendar for the annual report.

What it costs to ignore Idaho registration

Until it registers, an outside LLC has no right to sue in Idaho courts (Idaho Code 30-21-502(b)). The contracts it signs stay good (Idaho Code 30-21-502(c)).

Idaho foreign registration service: reader questions

Does an LLC from elsewhere have to register to operate in Idaho?

Yes, once it starts doing business there. Until it registers it cannot sue in the state's courts.

What will foreign registration cost you in Idaho?

$100 goes to the state and $199 to the service.

Will Idaho ask for something from your home state?

Yes: certificate of existence (certificate of good standing) from the home state, issued in the last 90 days.

Do you still need a registered agent after you register?

Yes. Keep a registered agent with a street address in the state on file.

Which foreign registration services did the desk rank here?

Idaho Registered Agent.co ($199), ID Registered Agent.org ($199) and Mainstay Filing ($199), best pick first.

Who is our pick for foreign registration in Idaho?

Idaho Registered Agent.co, since $199 over the state fee to register in Idaho, agent renewing at $99.

More from us

Where the numbers came from

  1. Idaho yearly filing: Annual report: due date, official source, last checked October 2026
  2. Idaho Code § 30-25-201, last checked August 2026
  3. Idaho formation fee: Filing fee, official source, last checked October 2026
  4. Idaho formation fee: Filing fee, official source, last checked October 2026
  5. Idaho registered agent statute, last checked October 2026
  6. Idaho Secretary of State, Foreign Registration Statement, last checked October 2026
  7. Idaho Secretary of State, business FAQ, last checked October 2026
  8. Idaho Code 30-21-505, activities that are not doing business, last checked October 2026
  9. Idaho Code 30-21-213, annual report, last checked October 2026
  10. Withdrawal of Foreign Registration Statement, last checked October 2026
  11. Idaho Code 30-21-502, registration to do business, last checked November 2026
  12. Idaho Registered Agent.co: pricing and service pages, as of November 12, 2026
  13. ID Registered Agent.org: pricing and service pages, as of November 12, 2026
  14. Mainstay Filing: Idaho service page, as of November 12, 2026