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Biz Formation Report

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

Foreign registration report · Idaho

3 Best Foreign Registration Services in Idaho (2026)

By the Biz Formation Report editorial team

Biz Formation Report ranks foreign registration services in Idaho for 2026 as ID Registered Agent.org ($199), Idaho Registered Agent.co ($199) and Mainstay Filing ($199), in that order. ID Registered Agent.org earns the top grade: $199 beyond the state fee to register in Idaho, agent renewing at $99.

No.1

Top pick on this page

1. ID Registered Agent.org: best for companies adding Idaho alone

Score9.5out of 10
$199 service fee and the state fee on top; the agent is $99 annually from year two

Top grade, ID Registered Agent.org: $199 plus the state fee, one year of registered agent service included, then $99 a year for the agent.

The plan seats the company at an in-state street address and posts scans of papers served there to your online account.

It beats Mainstay Filing on three-year cost.

What you get

  • Foreign registration done for you
  • The first year as your registered agent

Good

  • Year-one registered agent service is covered
  • Registers the company at $199 plus filing fees
  • $99 annually to keep the agent

Weak spots

  • Serves Idaho only; the home state still needs its own agent
  • The EIN application costs $99 extra
Visit ID Registered Agent.orgPartner link. We may earn money if you buy.
Read the ID Registered Agent.org review
No.2

Lower renewal than Mainstay

2. Idaho Registered Agent.co: best for registering in Idaho only

Score9.0out of 10
$199 service fee and the state fee on top; the agent is $99 annually from year two

Second grade, Idaho Registered Agent.co: $199 plus the state fee, one year of registered agent service included, then $99 a year for the agent.

The plan seats the company at an in-state street address and posts scans of papers served there to your online account.

The two state services, ID Registered Agent.org and Idaho Registered Agent.co, match on price and features, and the order between them is a narrow call.

What you get

  • Foreign registration done for you
  • The first year as your registered agent

Good

  • $199 for registration, plus the state fee
  • Then $99 per year for the agent
  • The first year as your registered agent is included

Weak spots

  • Serves Idaho only; the home state still needs its own agent
  • The EIN application costs $99 extra
Visit Idaho Registered Agent.coPartner link. We may earn money if you buy.
Read the Idaho Registered Agent.co review
No.3

Best for expanding companies

3. Mainstay Filing: best for companies registered in several states

Score8.9out of 10
A $199 service fee and the state fee ($299 today), then the agent at $149

Third grade, Mainstay Filing: the Idaho registration is filed for $199, and the registered agent is free in year one, then $149 a year.

There is no agent charge in year one; after that it is $149 a year in every state.

ID Registered Agent.org is $100 cheaper across three years, and that difference lowers Mainstay Filing's cost grade.

What you get

  • Registration prepared and filed on your behalf
  • A free first registered agent year
  • Same-business-day scanning of legal papers served, no fee

Good

  • Registered agent at no cost in year one
  • $199 service fee plus the state's fee
  • Served papers scanned within the same business day, free
  • One price across all fifty states

Weak spots

  • The agent renews at $149, $50 more than ID Registered Agent.org
Visit Mainstay FilingPartner link. We may earn money if you buy.
Read the Mainstay Filing review

Summary of the 3 grades

RankProviderGradeService feeYear twoBest fitSite
1ID Registered Agent.org9.5$199$99/yrThe lowest agent renewal we rank hereVisit ID Registered Agent.orgPartner link. We may earn money if you buy.
2Idaho Registered Agent.co9.0$199$99/yrThe lowest agent renewal we rank hereVisit Idaho Registered Agent.coPartner link. We may earn money if you buy.
3Mainstay Filing8.9$199$149/yrCompanies with a presence in several statesVisit Mainstay FilingPartner link. We may earn money if you buy.

Our editors set each grade out of 10 from the weighted criteria on How we rank. Customers do not rate anything here.

Idaho foreign registration service prices, 2026: year one, renewal and three-year outlay

ProviderYear 1Year 2Year 3Three-year outlayYear-one agent covered
ID Registered Agent.org$199$99$99$397Included
Idaho Registered Agent.co$199$99$99$397Included
Mainstay Filing$199$149$149$497Free

All prices were taken from the companies' own websites on November 12, 2026. Idaho's $100 registration fee is payable on top of each row and is not part of these totals.

Why the order falls this way

Three-year bill was the deciding factor in Idaho. The method gives three-year bill and what the money buys 32% each and splits 36% across renewal handling, local rules match and pricing openness.

Total outlay with ID Registered Agent.org over three years: $397, $100 less than Mainstay Filing. Both providers include the first agent year, so the renewal price set the order.

Every criterion and weight is listed on How we rank.

Idaho foreign LLC registration: fee, document and filing office

To register, the outside company submits the Foreign Registration Statement to the Idaho Secretary of State, Business Services, with a state fee of $100. Idaho also wants certificate of existence (certificate of good standing) from the home state, dated within 90 days of the filing.

After registration the company owes the annual report, due before the end of the month in which the LLC registered.

Documents to have on hand

  • Certificate of existence (certificate of good standing) from the home state, dated within 90 days of filing.
  • The legal name as recorded in the home state, and the date of formation.
  • An in-state registered agent; any provider in this report can serve.
  • Payment of the $100 state fee with the filing.
  • The due date of the annual report, noted in your calendar.

The cost of skipping Idaho registration

An unregistered foreign LLC has no right to sue in Idaho courts until it registers (Idaho Code 30-21-502(b)). Its contracts remain enforceable (Idaho Code 30-21-502(c)).

Idaho foreign registration service: common questions

Must an LLC from another state register with Idaho?

Yes, as soon as it transacts business there. Until then it has no standing to bring a lawsuit in the state's courts.

How much does Idaho foreign registration cost?

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

Does Idaho demand proof of good standing from the home state?

Yes. The filing needs certificate of existence (certificate of good standing) from the home state, issued no more than 90 days ago.

Is a registered agent still needed after foreign registration?

Yes. A registered agent with a street address in the state has to remain on file.

Which foreign registration services does this report rank?

ID Registered Agent.org ($199), Idaho Registered Agent.co ($199) and Mainstay Filing ($199), in descending order of grade.

What is the best foreign registration service for Idaho?

ID Registered Agent.org: the Idaho registration for $199 with year-one agent service included, then $99 a year.

More from us

Source notes

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