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Do it right · Idaho

3 Best Foreign Registration Services in Idaho (2026): Where to Start

Your 2026 shortlist for foreign registration services in Idaho reads Mainstay Filing ($199), Idaho Registered Agent.co ($199) and ID Registered Agent.org ($199), in our order. Set aside $100 for Idaho to register, and $397 to $497 for services over three years.
Written by the Simple Filing Guide editorial team

Quick guide

What you pay the state
$100
Attach a certificate?
Yes, it is required (90 days or newer)
Afterward
Nothing to pay, annual report
Where to start
Mainstay Filing, Idaho Registered Agent.co then ID Registered Agent.org

Idaho: the ranking

Want to know why this order? See how we rank.

#1 Top pick

1. Mainstay Filing: best for companies that keep growing

Service $199 plus $100 to the state; agent renewal $149

Start with Mainstay Filing in Idaho: you pay $199 plus Idaho's fee, get a free first registered agent year and then pay $149 a year.

Choosing Idaho Registered Agent.co would save $100 over three years, with the limit that it covers one state.

Every state charges the same $149 a year for the registered agent after year one.

Checklist: what is included
  • Application prepared and sent
  • Registered agent, no charge in the first year
  • A flat nationwide fee
What works
  • $199 to file the registration
  • No registered agent fee in year one
  • Ready for the next state you add
Gaps
  • Pay $50 more a year for the agent
See Mainstay Filing's plans Partner link. We may earn money if you buy.
#2 Idaho only

2. Idaho Registered Agent.co: best for a budget registration

Service $199 plus $100 to the state; agent renewal $99

Why Idaho Registered Agent.co second? Because $199 files the registration, and the agent renews at $99 each year.

Checklist: what is included
  • State registration completed
  • First-year agent
What works
  • Registers you for $199
  • Then $99 annually
  • First-year agent service is covered
Gaps
  • Your home state needs a separate agent
See Idaho Registered Agent.co's plans Partner link. We may earn money if you buy.
#3 Idaho only

3. ID Registered Agent.org: best for a second in-state filer

Service $199 plus $100 to the state; agent renewal $99

Why ID Registered Agent.org third? Because $199 files the registration, and the agent renews at $99 each year.

Its prices match Idaho Registered Agent.co exactly, so compare service before you choose.

Checklist: what is included
  • State registration completed
  • First-year agent
What works
  • Then $99 annually
  • First-year agent service is covered
  • Registers you for $199
Gaps
  • Your home state needs a separate agent
See ID Registered Agent.org's plans Partner link. We may earn money if you buy.

The table

#PickFirst-year priceYearly afterTotal for 3 yearsWhat is covered
1 Mainstay Filing $199$149/yr$497application prepared and sent; registered agent, no charge in the first year; A flat nationwide fee See Mainstay Filing's plans Partner link. We may earn money if you buy.
2 Idaho Registered Agent.co $199$99/yr$397state registration completed; First-year agent See Idaho Registered Agent.co's plans Partner link. We may earn money if you buy.
3 ID Registered Agent.org $199$99/yr$397state registration completed; First-year agent See ID Registered Agent.org's plans Partner link. We may earn money if you buy.

Company prices from November 13, 2026, before state fees.

Questions to settle

Does my LLC from another state have to register?

An out-of-state LLC signs up with the Idaho Secretary of State, Business Services first and begins business in Idaho afterward.

Without registration, expect it cannot act as a plaintiff (Idaho Code 30-21-502(b)).

archive.sos.idaho.gov / October 2026 / confirmed

What will I pay to register?

Plan on $100 for the state; a service adds $199.

Add three years of state fees, registration included, and you get $100. legislature.idaho.gov / October 2026 / confirmed

What do I submit?

File the Foreign Registration Statement with the Idaho Secretary of State, Business Services. That single filing registers the LLC.

Add certificate of existence (certificate of good standing) from the home state issued in the past 90 days.

Is there a filing that repeats?

Next you file the annual report, which costs nothing.

The state sets the deadline at Before the end of the month in which the LLC registered.

Why is number one first?

Filing jobs included (27% of the score) is where Mainstay Filing does best.

64% of the score comes from total for three years and filing jobs included.

Idaho Registered Agent.co covers only Idaho; your home state would still need another provider.

Read the method

Idaho checklist, with sources

StepWhat to knowOfficial source
Cost to register $100legislature.idaho.gov / October 2026 / confirmed
Document from home Yes, it is required, 90 daysarchive.sos.idaho.gov / October 2026 / confirmed
State total, years one to three $100Rows above, added up

Add the filing fee, the reports for years two and three and any minimum tax to reproduce the last row. Costs with no set amount, such as a newspaper notice, are left out.

FAQ

What about the state where I formed the LLC?

Keep one at home. Mainstay Filing serves both states, and a local company serves only one.

Three years in, what has each cost?

Three-year costs: Mainstay Filing, $497; Idaho Registered Agent.co, $397; ID Registered Agent.org, $397, and state fees are separate.

Are the fees official?

Every state fee links to its official page, and every service price is read from the company's own site.

Does the state require a service?

Hiring is optional. The law requires a filing, not a filer.

Will a service file the registration for me?

All of them do, and the state fee stays identical.

Which foreign registration service should I start with in Idaho?

Mainstay Filing is on top because registering costs $199, with no registered agent charge until year two; Idaho Registered Agent.co and ID Registered Agent.org follow.

Verify these facts

  1. Idaho yearly filing: Annual report: confirmed October 2026 using legislature.idaho.gov
  2. Idaho Code § 30-25-201: confirmed August 2026 using legislature.idaho.gov
  3. Idaho formation fee: Filing fee: confirmed October 2026 using sos.idaho.gov
  4. Idaho formation fee: Filing fee: confirmed October 2026 using legislature.idaho.gov
  5. Idaho registered agent statute: confirmed October 2026 using legislature.idaho.gov
  6. Idaho Secretary of State, Foreign: confirmed October 2026 using archive.sos.idaho.gov
  7. Idaho Secretary of State, business: confirmed October 2026 using sos.idaho.gov
  8. Idaho Code 30-21-505, activities that: confirmed October 2026 using legislature.idaho.gov
  9. Idaho Code 30-21-213, annual report: confirmed October 2026 using legislature.idaho.gov
  10. Withdrawal of Foreign Registration Statement: confirmed October 2026 using archive.sos.idaho.gov
  11. Idaho Code 30-21-502, registration to: confirmed November 2026 using legislature.idaho.gov
  12. Pricing from the Mainstay Filing Idaho service page, November 13, 2026
  13. Pricing from the Idaho Registered Agent.co pricing page, November 13, 2026
  14. Pricing from the ID Registered Agent.org pricing page, November 13, 2026