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LLC UnpackedEvery filing, unpacked: the fee, the form, the catch.

Unpacked · Idaho

3 Best Foreign Registration Services in Idaho (2026), Opened Up

In Idaho for 2026, unpack foreign registration services in this order: Mainstay Filing ($199), ID Registered Agent.org ($199) and Idaho Registered Agent.co ($199). Every option pays the state $100, then services total $397 to $497 across three years.
Unpacked by the LLC Unpacked editorial team

Top layer

State fee to register
$100
Certificate packed in?
Yes (90 days old at most)
Afterward
No fee, annual report
Top of the stack
Mainstay Filing, ID Registered Agent.org then Idaho Registered Agent.co

The Idaho stack, best on top

Prices come from each company's own page. See how we open it up.
Ranked first

1. Mainstay Filing: best for registering in many states

$199 to register; agent renewal $149

Mainstay Filing sits on top in Idaho because $199 over the state fee registers you, with the registered agent not charged in year one and $149 a year after.

Is it the smallest bill? No. ID Registered Agent.org costs $100 less over three years, but only in Idaho.

Year one of the registered agent is inside the price; afterward it is $149 annually.

Inside the price

  • The registration filing, included
  • Registered agent, not charged in year one
  • The same fee in all fifty states

Inside, the good

  • $199 to file
  • No registered agent fee in year one
  • The price does not change by state

Inside, the catch

  • Renewal $50 over ID Registered Agent.org
Idaho only

2. ID Registered Agent.org: best for registering in a single place

$199 to register; agent renewal $99

What puts ID Registered Agent.org second: it charges $199 with first-year agent service inside, then $99 annually.

Inside the price

  • Foreign filing handled
  • A first year of agent service

Inside, the good

  • $199 over the state fee
  • Agent renews at $99
  • A first year of agent service is inside

Inside, the catch

  • Nothing outside this state
Idaho only

3. Idaho Registered Agent.co: best for another in-state option

$199 to register; agent renewal $99

What puts Idaho Registered Agent.co third: it charges $199 with first-year agent service inside, then $99 annually.

Its prices match ID Registered Agent.org exactly, so the order between them is close.

Inside the price

  • Foreign filing handled
  • A first year of agent service

Inside, the good

  • A first year of agent service is inside
  • $199 over the state fee
  • Agent renews at $99

Inside, the catch

  • Nothing outside this state

Side by side

#PickYear oneRenewalThree-year totalWhat is inside
1Mainstay Filing$199$149/yr$497the registration filing, included; registered agent, not charged in year one; the same fee in all fifty statesOpen Mainstay FilingPartner link. We may earn money if you buy.
2ID Registered Agent.org$199$99/yr$397foreign filing handled; A first year of agent serviceOpen ID Registered Agent.orgPartner link. We may earn money if you buy.
3Idaho Registered Agent.co$199$99/yr$397foreign filing handled; A first year of agent serviceOpen Idaho Registered Agent.coPartner link. We may earn money if you buy.
Service fees only, from company prices read November 13, 2026. State fees are the same whichever pick you open.

Opened up, question by question

Does my LLC from another state have to register?

The order matters: the Idaho Secretary of State, Business Services gets the registration first, and the LLC starts doing business in Idaho afterward.

What an unregistered LLC can run into: Idaho's courts stay closed to it as a plaintiff until it registers (Idaho Code 30-21-502(b)).

peek at archive.sos.idaho.gov, confirmed October 2026

What is inside the cost of registering?

Two parts: $100 to the state and $199 to a service.

By year three the state will have collected $100. peek at legislature.idaho.gov, confirmed October 2026

Which form is inside the filing, and where does it go?

The Foreign Registration Statement is the filing, and the Idaho Secretary of State, Business Services receives it.

Pack in certificate of existence (certificate of good standing) from the home state issued within the last 90 days.

Is there a filing that repeats?

A recurring annual report follows, priced at no charge.

The state frames the deadline as Before the end of the month in which the LLC registered.

Why is the stack in this order?

On what is inside the price (29%), Mainstay Filing comes out ahead.

Five layers set the order: total across three years (34%), what is inside the price (29%), price laid out in the open (14%), how the renewal behaves (12%) and how far it reaches (11%).

An LLC registering out of state already works in two states, and the first pick can serve both.

How we open it up

Idaho registration, unpacked

PartWhat is insidePeek at source
Fee to register$100peek at legislature.idaho.gov, confirmed October 2026
Certificate from homeYes, 90 dayspeek at archive.sos.idaho.gov, confirmed October 2026
What the state collects in three years$100The rows above, stacked
The last row stacks the filing fee, the reports in years two and three and any minimum tax. A cost with no fixed amount, such as a newspaper notice, is explained above and kept out of the sum.

More boxes to open

Does the home state need its own agent?

Yes. Think of two separate rule books, your home state's and this one's. Mainstay Filing works in both, so a single account can serve the pair.

How do the three-year totals compare?

Mainstay Filing stacks up to $497, ID Registered Agent.org stacks up to $397, Idaho Registered Agent.co stacks up to $397, with state fees on top.

What do these numbers rest on?

The state-side figures were taken from Idaho's own publications, and the service prices from the price page each company posts. Dates for both appear on this page.

Do I have to use a service?

No. Owners can file with the state directly. A service saves time and can act as agent, but nothing makes you hire one.

Can I hire someone to register the LLC?

Handled: submitting the registration is part of every pick's service, and the state's fee stays level.

What is the best foreign registration service for Idaho?

Mainstay Filing, because the price is $199 in every state, and the first registered agent year is inside it. Then ID Registered Agent.org and Idaho Registered Agent.co.

What the page rests on

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