Skip to content
Biz Formation Academy

A plain textbook on LLC paperwork, one state per chapter.

Unit 3 · Idaho

Foreign LLC Registration Chapter, Idaho (2026): 5 Sections and the 3 Best Services

Idaho readers who want help registering an LLC formed elsewhere in 2026 should look at Mainstay Filing ($199), ID Registered Agent.org ($199) and Idaho Registered Agent.co ($199), in the order given. 5 sections explain the filing, the $100 fee and the duties that follow.
Written by the Biz Formation Academy editorial board

Read first

Registration fee $100 See legislature.idaho.gov; page last consulted October 2026
Certificate from the state of formation 90 days Maximum age at filing
Recurring report None Annual report
What the state collects over three years $100 No service fee included
Section count 5 First to last

After this chapter you will understand

  • When registration is required
  • What to file and what it costs
  • Recurring obligations
  • The recommendations and their reasons

The Idaho shortlist

Ranked by the grading page: three-year cost (34%), paperwork completed (30%), second-year price, fit with Idaho rules and clarity of the price list.

1. Mainstay Filing: best for a series of registrations

Recommended first
$199 plus fees; renewal $149 annually

Mainstay Filing is ranked first in Idaho: the first-year agent is included, so the Idaho registration costs $199 beyond the state fee.

Over three years it costs $100 above ID Registered Agent.org, in exchange for more of the work done.

Year two brings a charge for the agent, $149 a year, and it is the same in every state.

Price covers

  • Registration is filed for you
  • The registered agent carries no charge in year one
  • One fee wherever the LLC registers

Advantages

  • Registered agent costs nothing in year one
  • $199 above the state fee
  • All fifty states covered

Limitations

  • Renewal $50 above ID Registered Agent.org's
Visit Mainstay Filing Partner link. We may earn money if you buy.

2. ID Registered Agent.org: best for one more state

In-state service
$199 plus fees; renewal $99 annually

The second recommendation, ID Registered Agent.org: the registration charge is $199 plus state fees, and the first agent year is already paid.

Price covers

  • Registration filing
  • A year of agent service is built into the price

Advantages

  • A year of agent service is included
  • Then $99 per year
  • $199 above the state fee

Limitations

  • Limited to one state
Visit ID Registered Agent.org Partner link. We may earn money if you buy.

3. Idaho Registered Agent.co: best for another Idaho choice

In-state service
$199 plus fees; renewal $99 annually

The third recommendation, Idaho Registered Agent.co: the registration charge is $199 plus state fees, and the first agent year is already paid.

It publishes the same prices as ID Registered Agent.org.

Price covers

  • Registration filing
  • A year of agent service is built into the price

Advantages

  • A year of agent service is included
  • $199 above the state fee
  • Then $99 per year

Limitations

  • Limited to one state
Visit Idaho Registered Agent.co Partner link. We may earn money if you buy.

3 services, side by side

#ServiceFirst yearFrom year twoThree-year total
1 Mainstay Filing $199$149/yr$497 Visit Mainstay Filing Partner link. We may earn money if you buy.
2 ID Registered Agent.org $199$99/yr$397 Visit ID Registered Agent.org Partner link. We may earn money if you buy.
3 Idaho Registered Agent.co $199$99/yr$397 Visit Idaho Registered Agent.co Partner link. We may earn money if you buy.

Each company's posted price on November 13, 2026. The $100 state fee is omitted from these figures.

The Idaho registration, in sequence

  1. Section 1

    When Idaho requires registration

    An LLC formed in another state must register with Idaho before conducting business there. Doing business without registering risks: the courts of Idaho are closed to its claims until it registers (Idaho Code 30-21-502(b)) agreements already made are not voided (Idaho Code 30-21-502(c))

    Reference: See archive.sos.idaho.gov; page last consulted October 2026

  2. Section 2

    Request the home-state certificate

    Attach certificate of existence (certificate of good standing) from the home state, issued within 90 days.

    Request it shortly before the filing date.

  3. Section 3

    Arrange an Idaho registered agent

    Every LLC must name a registered agent with an in-state street address. The address has to be a physical street address in Idaho. P.O. boxes and commercial mailboxes are not accepted.

    Every recommended service provides the registered agent.

    Reference: See legislature.idaho.gov; page last consulted October 2026

  4. Section 4

    Your paperwork here is the Foreign Registration Statement

    The form and a fee of $100 are sent together to the Idaho Secretary of State, Business Services.

    Reference: See legislature.idaho.gov; page last consulted October 2026

  5. Section 5

    Handle Idaho's recurring filing

    After registration, a foreign LLC files the annual report, before the end of the month in which the LLC registered.

The price list

SectionWho is paidTotal
Fee to register The state$100
Optional service The service$199 for year one
Three years of state fees The state$100

State fees come from the official pages in the bibliography. Over three years they consist of the filing, two reports and, in a few states, a minimum tax.

Why Mainstay Filing is first

Chapters the price completes accounts for 30% of the ranking, and led on it in Idaho.

The company belongs to one state and operates in a second; one provider for both fits best.

Short answers

What does Idaho charge a foreign LLC to register?

$100 as the official fee. The recommended services add $199.

Which form do I file to register?

Look for the Foreign Registration Statement; it is sent to the Idaho Secretary of State, Business Services.

Do I need a certificate from my home state?

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

What if the LLC does business there without registering?

the courts of Idaho are closed to its claims until it registers (Idaho Code 30-21-502(b)) agreements already made are not voided (Idaho Code 30-21-502(c))

What is due after registering?

Next is the annual report.

Which service should handle the registration?

Choose Mainstay Filing: the service fee is $199 plus the state's own fee, the registered agent is free for year one, and the later price is $149 a year. Next are ID Registered Agent.org and Idaho Registered Agent.co.

See also

Bibliography and primary texts

  1. Bibliography entry for the Idaho yearly filing: Annual report: due date, official chapter: legislature.idaho.gov, consulted October 2026.
  2. Bibliography entry for the Idaho Code § 30-25-201 chapter: legislature.idaho.gov, consulted August 2026.
  3. Bibliography entry for the Idaho formation fee: Filing fee, official source chapter: sos.idaho.gov, consulted October 2026.
  4. Bibliography entry for the Idaho formation fee: Filing fee, official source chapter: legislature.idaho.gov, consulted October 2026.
  5. Bibliography entry for the Idaho registered agent statute chapter: legislature.idaho.gov, consulted October 2026.
  6. Bibliography entry for the Idaho Secretary of State, Foreign Registration Statement chapter: archive.sos.idaho.gov, consulted October 2026.
  7. Bibliography entry for the Idaho Secretary of State, business FAQ chapter: sos.idaho.gov, consulted October 2026.
  8. Bibliography entry for the Idaho Code 30-21-505, activities that are not doing chapter: legislature.idaho.gov, consulted October 2026.
  9. Bibliography entry for the Idaho Code 30-21-213, annual report chapter: legislature.idaho.gov, consulted October 2026.
  10. Bibliography entry for the Withdrawal of Foreign Registration Statement chapter: archive.sos.idaho.gov, consulted October 2026.
  11. Bibliography entry for the Idaho Code 30-21-502, registration to do business chapter: legislature.idaho.gov, consulted November 2026.
  12. November 13, 2026: Mainstay Filing's Idaho service page was consulted for the price tables
  13. November 13, 2026: ID Registered Agent.org's pricing page was consulted for the price tables
  14. November 13, 2026: Idaho Registered Agent.co's pricing page was consulted for the price tables