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A practical guide · Idaho

3 Best LLC Services in Idaho (2026): Where to Start

Start with this 2026 ranking of LLC formation services in Idaho: Idaho Registered Agent.co ($199), Mainstay Filing ($199) and ID Registered Agent.org ($199), in that order. Whichever you choose, the state charges $100 to file, and the services total $397 to $597 across three years.
Written by the Simple Filing Guide editorial team

The short route

Fee at the state
$100, once, up front
Ongoing
A report that costs nothing to file
Registered agent
Yes: the state requires it
Where to start
Idaho Registered Agent.co, Mainstay Filing then ID Registered Agent.org

Idaho: the ranking

Want to know why this order? See how we rank.

#1 Recommended first

1. Idaho Registered Agent.co: best for holding three-year cost down

Formation $199, agent renewal $99, state fee extra

Idaho Registered Agent.co takes the top spot, since its $99 renewal brings three years to $397.

Cost decides this one, since the three-year bill is lower than at Mainstay Filing.

Leave time for the annual report, since it is not included.

Checklist: what is included
  • Articles filed on your behalf
  • First-year agent
What works
  • Agent renews at $99 afterward
  • Forms the LLC for $199 plus the state fee
  • A free agent year at the start
Gaps
  • Not included: the annual report
  • Add $99 for EIN help
Visit Idaho Registered Agent.co to begin Partner link. We may earn money if you buy.
#2 Nationwide

2. Mainstay Filing: best for knowing next year's bill early

$199 a year plus $100 for the state

Next, consider Mainstay Filing: its $199 yearly price pays for forming the LLC, serving as the registered agent and filing the annual report, and renews at $199.

Three years here run $200 higher than Idaho Registered Agent.co.

It files the annual report as well, and the state does not charge for it.

Checklist: what is included
  • LLC formation filed with the state
  • Registered agent all year
  • Annual report looked after for you
  • EIN request filed
  • No markup on state fees
What works
  • Single yearly fee: $199
  • No jump at renewal ($199)
  • Takes care of the EIN step
Gaps
  • Costs $100 extra each year after the first
Visit Mainstay Filing to begin Partner link. We may earn money if you buy.
#3 One-state pick

3. ID Registered Agent.org: best for a low agent renewal

Formation $199, agent renewal $99, state fee extra

Next, consider ID Registered Agent.org: its $99 renewal brings three years to $397.

Leave time for the annual report, since it is not included.

Idaho Registered Agent.co charges the same, so this is nearly a tie.

Checklist: what is included
  • Articles filed on your behalf
  • First-year agent
What works
  • Agent renews at $99 afterward
  • Forms the LLC for $199 plus the state fee
  • A free agent year at the start
Gaps
  • Not included: the annual report
  • Add $99 for EIN help
Visit ID Registered Agent.org to begin Partner link. We may earn money if you buy.

Cost check

#ProviderYear-one costAt renewalTotal for 3 yearsWhat is covered
1 Idaho Registered Agent.co $199$99/yr$397articles filed on your behalf; First-year agent Visit Idaho Registered Agent.co to begin Partner link. We may earn money if you buy.
2 Mainstay Filing $199$199/yr$597LLC formation filed with the state; registered agent all year; annual report looked after for you Visit Mainstay Filing to begin Partner link. We may earn money if you buy.
3 ID Registered Agent.org $199$99/yr$397articles filed on your behalf; First-year agent Visit ID Registered Agent.org to begin Partner link. We may earn money if you buy.

We read these prices on November 13, 2026, and three years means year one plus two renewals.

Work through these

What does the state charge, and what does a service add?

Set aside $100 for the filing and $199 for help.

State fees for the first three years add up to $100. legislature.idaho.gov, last confirmed October 2026 for this guide

What exactly do I submit?

The Idaho Secretary of State accepts the Certificate of Organization Limited Liability Company, and its approval forms the company.

Governing law: Idaho Code § 30-25-201. Processing time: About 7 to 10 days. legislature.idaho.gov, last confirmed October 2026 for this guide

Do I have to list a registered agent on the filing?

Every LLC must name a registered agent with an in-state street address.

An Idaho resident, or a business entity authorized to do business in Idaho. An assumed business name (DBA) cannot serve.

legislature.idaho.gov, last confirmed October 2026 for this guide

Does the state bill me every year?

File the annual report once a year. The fee is nothing. The state's due date reads: last day of the entity's anniversary month. Note it early.

legislature.idaho.gov, last confirmed October 2026 for this guide

Can I file it myself instead of hiring a service?

Yes, you can. On your own, the three-year bill is just the state's fees: $100.

Choosing a service raises your three-year cost by $397 to $597.

How did you rank them?

Total for three years (37% of the score) is where Idaho Registered Agent.co does best.

Start with total for three years, then filing jobs included, then three smaller checks.

$397 for three years at Idaho Registered Agent.co is $200 under Mainstay Filing.

See the scoring

Idaho checklist, with sources

StepWhat to knowVerify
Fee to file the LLC $100legislature.idaho.gov, last confirmed October 2026 for this guide
Registered agent Yes: the state requires itlegislature.idaho.gov, last confirmed October 2026 for this guide
Annual report No feelegislature.idaho.gov, last confirmed October 2026 for this guide
Paid to the state by year three $100Rows above, added up

The final row is a sum that we calculated, not a figure printed by the state: filing, two reports and any minimum tax.

FAQ

What is the processing time?

About 7 to 10 days.

Who handles the EIN?

It is free at Mainstay Filing. The remaining picks charge $99 (Idaho Registered Agent.co), $99 (ID Registered Agent.org).

Over three years, what does each charge?

Totals to compare: Idaho Registered Agent.co at $397, Mainstay Filing at $597, ID Registered Agent.org at $397, with state fees on top.

What sources do you use?

Official Idaho documents supply the state fees, and the companies' own pricing pages supply the service fees. Both carry dates on this page.

Does the state require a service?

No. You can file with the state yourself; a service saves time and can act as your agent, but nothing makes you hire one.

Which one do you recommend in Idaho?

Idaho Registered Agent.co leads on total for three years, ahead of Mainstay Filing and ID Registered Agent.org.

Verify these facts

  1. legislature.idaho.gov (Idaho yearly filing: Annual report), verified October 2026
  2. legislature.idaho.gov (Idaho Code § 30-25-201), verified August 2026
  3. sos.idaho.gov (Idaho formation fee: Filing fee), verified October 2026
  4. legislature.idaho.gov (Idaho formation fee: Filing fee), verified October 2026
  5. legislature.idaho.gov (Idaho registered agent statute), verified October 2026
  6. sos.idaho.gov (Processing, official source), verified October 2026
  7. pricing page from Idaho Registered Agent.co, checked November 13, 2026
  8. Idaho service page from Mainstay Filing, checked November 13, 2026
  9. pricing page from ID Registered Agent.org, checked November 13, 2026