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Formation Scorecard

Foreign registration scorecard · Idaho

3 Best Foreign Registration Services in Idaho (2026)

On the Formation Scorecard 2026 scorecard for foreign registration services in Idaho the order reads Mainstay Filing ($199), Idaho Registered Agent.co ($199) and ID Registered Agent.org ($199). Mainstay Filing posts the top score: it files the Idaho registration for $199 and acts as your registered agent, free for year one and $149 a year after.
Researched and written by the Formation Scorecard editorial team
Rank #1 Our top pick

1. Mainstay Filing: best for companies spread across states

9.3 Editor score out of 10
Service fee $199 with the state fee added ($299 today); agent renewing at $149

Mainstay Filing leads the card: $199 plus state fees in any state, year-one registered agent service included.

Year one of agent service is on the house; later years cost $149 anywhere.

Mainstay's three-year total sits $100 above Idaho Registered Agent.co's, which the extra coverage earns back in our scoring.

What you get

  • Preparation and filing of the registration
  • A free first year as your registered agent
  • Legal papers served on the company scanned free on the same business day

Strengths

  • $199 service fee, with the state fee on top
  • Registered agent free for year one
  • Served papers scanned on the day they arrive, free
  • Same price across all fifty states

Watch for

  • Agent renewal of $149 is $50 more than Idaho Registered Agent.co charges
Visit Mainstay FilingPartner link. We may earn money if you buy. Mainstay Filing: the full write-up
Rank #2 Best for an Idaho-only company

2. Idaho Registered Agent.co: best for companies that add just Idaho

8.8 Editor score out of 10
$199 service fee plus the state fee; agent $99 yearly from year two

Idaho Registered Agent.co takes second spot: $199 plus the state fee and a year of registered agent service, then $99 yearly for the agent.

The plan puts the company at an in-state street address and scans papers served on it to your online account.

What you get

  • The registration filing
  • First-year registered agent service

Strengths

  • $99 per year for the agent after the first
  • Year one as your registered agent is included
  • $199 to register, state fee extra

Watch for

  • Limited to Idaho; your home state still needs an agent
  • $99 extra for the EIN application
Visit Idaho Registered Agent.coPartner link. We may earn money if you buy. Idaho Registered Agent.co: the full write-up
Rank #3 Best local option

3. ID Registered Agent.org: best for registrations in Idaho only

8.7 Editor score out of 10
$199 service fee plus the state fee; agent $99 yearly from year two

ID Registered Agent.org takes third spot: $199 plus the state fee and a year of registered agent service, then $99 yearly for the agent.

The plan puts the company at an in-state street address and scans papers served on it to your online account.

Price for price and feature for feature, Idaho Registered Agent.co and ID Registered Agent.org match, which leaves the order between them a narrow call.

What you get

  • The registration filing
  • Year-one registered agent service included

Strengths

  • Then $99 a year to keep the agent
  • A year of registered agent service is built in
  • Registration at $199, with the state fee added

Watch for

  • Limited to Idaho; your home state still needs an agent
  • $99 extra for the EIN application
Visit ID Registered Agent.orgPartner link. We may earn money if you buy. ID Registered Agent.org: the full write-up

The 3 entries on one card

Place Service Card score Service fee Year two Best for Go
1 Mainstay Filing 9.3 $199 $149/yr Companies spread over several states Visit Mainstay FilingPartner link. We may earn money if you buy.
2 Idaho Registered Agent.co 8.8 $199 $99/yr The lowest agent renewal we rank here Visit Idaho Registered Agent.coPartner link. We may earn money if you buy.
3 ID Registered Agent.org 8.7 $199 $99/yr The lowest agent renewal we rank here Visit ID Registered Agent.orgPartner link. We may earn money if you buy.

Every number out of 10 is an editorial mark from Formation Scorecard, produced with the criteria on How we rank, not a customer rating.

Idaho foreign registration service cost in 2026: first year, renewal and the three-year tally

Service First year Second year Third year Three-year tally Agent paid in year one
Mainstay Filing $199 $149 $149 $497 Free
Idaho Registered Agent.co $199 $99 $99 $397 Included
ID Registered Agent.org $199 $99 $99 $397 Included

Each price comes from the company's own site, read on November 12, 2026. Add Idaho's $100 registration fee to each row; the tally above leaves it out.

Why the order falls this way

Formation Scorecard scores cost across three years and coverage of the price at 25% each. Renewal terms, state-by-state fit and pricing clarity account for the other 50%. In Idaho the tie was broken by coverage of the price.

A foreign registration touches two states, so a single provider at one price in both earned the most coverage points, ahead of Idaho Registered Agent.co.

Every criterion and weight appears on How we rank.

Foreign LLC registration in Idaho: fee, form and filing office

An outside company registers by sending the Foreign Registration Statement to the Idaho Secretary of State, Business Services, with a $100 state fee. Idaho additionally requires certificate of existence (certificate of good standing) from the home state, dated no more than 90 days before filing.

Once registered, the company files the annual report, due before the end of the month in which the LLC registered.

Gather these before filing

  • Certificate of existence (certificate of good standing) from the home state, issued no earlier than 90 days before filing.
  • The company name exactly as the home state has it, plus the date it was formed.
  • An in-state registered agent; any service on this card can fill that role.
  • The state fee of $100, sent in with the filing.
  • A calendar date for the annual report.

The price of ignoring Idaho registration

An unregistered outside LLC cannot sue in Idaho courts until it registers (Idaho Code 30-21-502(b)). Its contracts remain valid (Idaho Code 30-21-502(c)).

Idaho foreign registration service: quick questions

Does Idaho make an outside LLC register before operating?

Yes, when the company does business there. Until it registers, the state's courts are closed to its lawsuits.

What will foreign registration run in Idaho?

Expect $100 for the state plus $199 for the service.

Is a home-state certificate part of the Idaho filing?

Yes, the state wants certificate of existence (certificate of good standing) from the home state, no older than 90 days.

Does a registered company still need a registered agent?

Yes, a registered agent with an in-state street address has to stay on file.

Which foreign registration services sit on this card?

Mainstay Filing ($199), Idaho Registered Agent.co ($199) and ID Registered Agent.org ($199), top to bottom.

Which foreign registration service leads the card for Idaho?

Mainstay Filing, since $199 on top of the state's fee, with a free first year as your registered agent and the same price in every state.

Read next

Where the figures come from

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