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Straight talk · Idaho

3 Best Registered Agents in Idaho (2026), Simply Ranked

Our 2026 favorites for registered agents in Idaho are Mainstay Filing ($149 a year), ID Registered Agent.org ($99 a year) and Idaho Registered Agent.co ($99 a year), best first. Prices start at $99 to $149 a year and add up to $297 to $447 by year three.
From the LLC Plainly editorial team

Quick take

Mandatory?
Required
Legal name
Registered agent
What services charge
$99 to $149 every year
Who we like
Mainstay Filing, ID Registered Agent.org then Idaho Registered Agent.co

Who we like in Idaho

The scoring is spelled out on this page.
Our top pick

1. Mainstay Filing: best for owners who plan to grow

Annual price $149, renewal price $149

We'd use Mainstay Filing in Idaho. One account at $149 a year works in whichever state you register in.

That $150 gap to ID Registered Agent.org over three years is what coverage in every state costs.

Your money buys

  • A real in-state address
  • Free scans of three government mailings a year
  • Works for LLCs, corporations, LPs, LLPs and nonprofits too

The good

  • It follows you to any state
  • Pay $149 a year and nothing changes at renewal

Trade-offs

  • You'd pay $50 more every year
  • You still handle the yearly report
Local to Idaho

2. ID Registered Agent.org: best for one-state companies

Annual price $99, renewal price $99

ID Registered Agent.org takes second, because one state, $99 a year, and then $99.

Your money buys

  • A staffed in-state address
  • Documents scanned to your login

The good

  • Pay $99 a year with no change at renewal
  • Under Mainstay Filing on yearly price

Trade-offs

  • A second state means a second agent
  • You'll have to remember the annual report on your own
Local to Idaho

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

Annual price $99, renewal price $99

Idaho Registered Agent.co takes third, because one state, $99 a year, and then $99.

Its prices match ID Registered Agent.org exactly, so either one works.

Your money buys

  • A staffed in-state address
  • Documents scanned to your login

The good

  • Pay $99 a year with no change at renewal
  • Under Mainstay Filing on yearly price

Trade-offs

  • A second state means a second agent
  • You'll have to remember the annual report on your own

The numbers side by side

#WhoYear oneAfter year oneThree-year totalIn the price
1Mainstay Filing$149$149/yr$447A real in-state address; free scans of three government mailings a year; Works for LLCs, corporations, LPs, LLPs and nonprofits tooSee what Mainstay Filing offersPartner link. We may earn money if you buy.
2ID Registered Agent.org$99$99/yr$297A staffed in-state address; documents scanned to your loginSee what ID Registered Agent.org offersPartner link. We may earn money if you buy.
3Idaho Registered Agent.co$99$99/yr$297A staffed in-state address; documents scanned to your loginSee what Idaho Registered Agent.co offersPartner link. We may earn money if you buy.
We read these prices on November 13, 2026. Three years means year one plus two renewals.

Straight answers

Will the state make me name a registered agent?

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

Statute: Idaho Code § 30-21-404. official: legislature.idaho.gov, October 2026

Who can I name as my agent?

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

You can skip the fee entirely if you meet the rule.

What will I pay an agent?

Prices start at $99 to $149 a year, and three years total $297 to $447.

No state fee depends on which agent you pick.

What does an agent do for the LLC?

It takes legal documents for your LLC at its Idaho address.

What matters is that nothing important goes unnoticed while you're out. Service of process in plain words

What does the state want from the LLC annually?

One thing keeps recurring, the annual report, each year, free of charge. As the state words it, it's due last day of the entity's anniversary month, and that's easy to forget.

official: legislature.idaho.gov, October 2026

What's behind the ranking?

It's work taken off your hands (31% of the score), and Mainstay Filing does best there.

Five checks set the order: cost across three years (33%), work taken off your hands (31%), prices stated clearly (14%), renewal price (12%) and where it works (10%).

Reach is the difference: fifty states versus one.

How we pick

Idaho rules at a glance

The ruleThe answerWhere we found it
Cost to form the LLC$100official: legislature.idaho.gov, October 2026
Registered agentRequiredofficial: legislature.idaho.gov, October 2026
Annual reportNo feeofficial: legislature.idaho.gov, October 2026
Three-year state total$100Rows above, totaled
Each figure above links to the state's official page. The final line is our addition of the filing, two reports and any minimum tax, and it leaves out variable costs.

Also worth knowing

Can an owner serve as agent?

Yes, if you meet the rules on who qualifies and on the address shown on this page.

Where does the agent have to be located?

The address has to be a physical street address in Idaho. P.O. boxes and commercial mailboxes are not accepted.

What's the three-year total for each?

Over three years you'd pay $447 at Mainstay Filing, $297 at ID Registered Agent.org, $297 at Idaho Registered Agent.co

What are the sources?

What the state charges comes from official Idaho publications; what services charge comes from what they publish.

Do I need to hire a service?

It's your call. You can file on your own if you meet the rules on this page.

Who tops the list in Idaho?

Mainstay Filing, because the $149 yearly price goes with you to any state you add. After that, ID Registered Agent.org and Idaho Registered Agent.co.

Where we got this

  1. legislature.idaho.gov: the page for Idaho yearly filing: Annual report, seen October 2026
  2. legislature.idaho.gov: the page for Idaho Code § 30-25-201, seen August 2026
  3. sos.idaho.gov: the page for Idaho formation fee: Filing fee, seen October 2026
  4. legislature.idaho.gov: the page for Idaho formation fee: Filing fee, seen October 2026
  5. legislature.idaho.gov: the page for Idaho registered agent statute, seen October 2026
  6. Mainstay Filing Idaho service page, read November 13, 2026
  7. ID Registered Agent.org pricing page, read November 13, 2026
  8. Idaho Registered Agent.co pricing page, read November 13, 2026