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Formation ClassClass is in session: LLC paperwork, state by state.

Class 3 · Idaho

Foreign LLC Registration Class, Idaho (2026): 5 Assignments and the 3 Best Services

If you want help registering an LLC from another state in Idaho in 2026, the top grades go to ID Registered Agent.org ($199), Mainstay Filing ($199) and Idaho Registered Agent.co ($199), in that order. Registering takes 5 assignments and a $100 state fee.

Taught by the Formation Class faculty

Read this first

Registration fee$100legislature.idaho.gov, last read in October 2026
Home-state certificate90 daysNo older than
Maintenance filingNoneAnnual report
What the state collects in three years$100State charges only
Assignment count5In order

What this class teaches

  • When registration is required
  • The filing, its price and its office
  • What staying registered costs
  • Which services we recommend and why

Idaho: the graded services

The teacher's five criteria are on how we grade, and they decide the order.
Highest grade

1. ID Registered Agent.org: best for a small yearly agent fee

$199 to register, $99 per year after

ID Registered Agent.org gets first place, and the reason is that $199 above the state fee to register, then $99 a year.

Since Mainstay Filing costs more across three years, this service ends up on top.

Covered by the tuition

  • The Idaho registration, prepared and sent
  • One year of agent service is part of the price

Strengths

  • A free first agent year
  • $199 above the state fee
  • A small $99 renewal

Weak spots

  • No help in other states
Works in every state

2. Mainstay Filing: best for a string of registrations

$199 to register, $149 per year after

Second place goes to Mainstay Filing, since a $199 service fee plus Idaho's own fee, then $149 a year for the agent.

A $100 gap to ID Registered Agent.org over three years decides where it lands.

Agent service past the first year is $149 yearly.

Covered by the tuition

  • Registration paperwork handled
  • The registered agent costs nothing in year one
  • A service for all fifty states

Strengths

  • $199 on top of Idaho's fee
  • All fifty states covered
  • Registered agent is free in year one

Weak spots

  • Renewal $50 above ID Registered Agent.org's
Local choice

3. Idaho Registered Agent.co: best for Idaho-only registrations

$199 to register, $99 per year after

Our third pick, Idaho Registered Agent.co: $199 above the state fee to register, then $99 a year.

Its prices match ID Registered Agent.org's, so either works.

Covered by the tuition

  • The Idaho registration, prepared and sent
  • One year of agent service is part of the price

Strengths

  • A small $99 renewal
  • $199 above the state fee
  • A free first agent year

Weak spots

  • No help in other states

The Idaho grades compared

#ServiceFirst yearFrom year twoThree-year total
1ID Registered Agent.org$199$99/yr$397Visit ID Registered Agent.orgPartner link. We may earn money if you buy.
2Mainstay Filing$199$149/yr$497Visit Mainstay FilingPartner link. We may earn money if you buy.
3Idaho Registered Agent.co$199$99/yr$397Visit Idaho Registered Agent.coPartner link. We may earn money if you buy.
Listed prices, read November 13, 2026. None of the rows includes the $100 state fee.

The Idaho registration, in order

  1. Assignment
    1

    Does the rule apply to you?

    Vocabulary word: a foreign LLC is one formed in a different state. It registers before it does business in Idaho. The cost of not registering: If you may need to sue, register first (Idaho Code 30-21-502(b)). Its contracts remain valid (Idaho Code 30-21-502(c)).

    Textbook page: archive.sos.idaho.gov, last read in October 2026

  2. Assignment
    2

    Get a certificate from your home state

    You need certificate of existence (certificate of good standing) from the home state, not older than 90 days.

    Ask for the certificate shortly before filing day.

  3. Assignment
    3

    Name a registered agent for Idaho

    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.

    The grade list covers this role.

    Textbook page: legislature.idaho.gov, last read in October 2026

  4. Assignment
    4

    Work up the Foreign Registration Statement

    To register, hand the Foreign Registration Statement to the Idaho Secretary of State, Business Services with $100.

    Textbook page: legislature.idaho.gov, last read in October 2026

  5. Assignment
    5

    Keep the registration alive

    Next on the schedule is the annual report, before the end of the month in which the LLC registered.

The bill

ItemGoes toPrice
Registration feeState agency$100
Optional serviceThe service$199 for year one
State fees over years one to threeState agency$100
Here is how the three-year state row works: filing fee, plus the report in each of years two and three, plus any yearly minimum tax. Service fees get their own rows.

How the grades came out

pulled ahead of on tuition across three years, which counts for 30%.

Three years with ID Registered Agent.org add up to $397, which is $100 under Mainstay Filing.

Short answers

Which fees does Idaho take from a foreign LLC?

$100 at the state office. Service fees: $199.

Which form do I file to register?

Fill in the form named in assignment 4 and send it 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?

If you may need to sue, register first (Idaho Code 30-21-502(b)). Its contracts remain valid (Idaho Code 30-21-502(c)).

What is due after registering?

Next is the annual report.

Which service should handle the registration?

Pick ID Registered Agent.org: registration costs $199 plus state fees, and the first agent year is already paid. Then Mainstay Filing and Idaho Registered Agent.co.

More classes

Textbook pages and extra reading

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