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Straight talk · Idaho

3 Best LLC Services in Idaho (2026): Our Honest Take

In Idaho for 2026, we like ID Registered Agent.org ($199), Mainstay Filing ($199) and Idaho Registered Agent.co ($199), ranked from first to last. Of what you'll spend, $100 goes to the state and $397 to $597 goes to the service over three years.
From the LLC Plainly editorial team

Short answer

State filing fee
$100, when you file
Later on
A report that costs nothing
Registered agent
Yes, the law says so
Our ranking
ID Registered Agent.org, Mainstay Filing then Idaho Registered Agent.co

Who we'd use in Idaho

Ranked best first using the checks on our method page.
Start here

1. ID Registered Agent.org: best for keeping three-year cost down

First year $199; after that $99 annually

Why ID Registered Agent.org? Honestly, it starts at $199 with the first agent year included and runs $99 a year after that.

With a lower three-year cost than Mainstay Filing, it comes first for a company that stays put.

It leaves the annual report out of what you pay for.

Your money buys

  • LLC filing handled
  • Agent included for year one

The good

  • $199 to get going
  • Year two onward: $99
  • A free agent year at the start

Trade-offs

  • You'll have to remember the annual report on your own
  • Getting an EIN costs $99 more
All 50 states

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

$199 yearly

Mainstay Filing takes second, because the annual report comes with the $199 yearly price, next to formation and the registered agent.

At $200 more than ID Registered Agent.org over three years, it lands lower on our list.

The annual report is covered, and Idaho doesn't bill for it.

Your money buys

  • The state filing, taken care of
  • Registered agent year-round
  • Annual report handled when it comes due
  • EIN request filed
  • The state's fee at cost

The good

  • Pay $199 a year and the filing, agent and report are covered
  • You won't pay extra to get an EIN
  • Stays at $199 when you renew

Trade-offs

  • ID Registered Agent.org charges $100 less at renewal
One-state pick

3. Idaho Registered Agent.co: best for companies that stay in one state

First year $199; after that $99 annually

Idaho Registered Agent.co takes third, because it starts at $199 with the first agent year included and runs $99 a year after that.

It leaves the annual report out of what you pay for.

The same published prices as ID Registered Agent.org, so go with whichever you like.

Your money buys

  • LLC filing handled
  • Agent included for year one

The good

  • $199 to get going
  • Year two onward: $99
  • A free agent year at the start

Trade-offs

  • You'll have to remember the annual report on your own
  • Getting an EIN costs $99 more

Compared

#WhoYear oneAfter year one3 yearsCovers
1ID Registered Agent.org$199$99/yr$397LLC filing handled; agent included for year oneHead to ID Registered Agent.orgPartner link. We may earn money if you buy.
2Mainstay Filing$199$199/yr$597the state filing, taken care of; Registered agent year-round; annual report handled when it comes dueHead to Mainstay FilingPartner link. We may earn money if you buy.
3Idaho Registered Agent.co$199$99/yr$397LLC filing handled; agent included for year oneHead to Idaho Registered Agent.coPartner link. We may earn money if you buy.
Prices as of November 13, 2026. Your state's own fees are in the checklist below.

The questions, one by one

What's the real cost of starting one?

$100 if you file yourself, and $199 more if a service does it.

Three years of state fees will cost you $100. check it at legislature.idaho.gov, October 2026

What goes to the state to form the LLC?

You send the Certificate of Organization Limited Liability Company to the Idaho Secretary of State, and that single filing starts your LLC.

Where the law says so: Idaho Code § 30-25-201. Expected wait: About 7 to 10 days. check it at legislature.idaho.gov, October 2026

Will the state make me name a registered agent?

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.

check it at legislature.idaho.gov, October 2026

Does the state bill me later on?

The annual report costs nothing and comes due every year. The due date, per the state, is last day of the entity's anniversary month; put it on your calendar.

check it at legislature.idaho.gov, October 2026

Do I have to pay a service at all?

Sure. Skip the service and you'd pay the state $100 over three years.

Expect $397 to $597 over three years if you hire.

How did you decide the order?

ID Registered Agent.org is strongest on cost across three years, which counts for 33% of our score.

33% of the score is cost across three years, 31% is work taken off your hands, and three smaller checks split ties.

Picking ID Registered Agent.org over Mainstay Filing keeps $200 in your pocket across three years.

How we pick

Idaho rules at a glance

The ruleThe answerWhere we found it
Cost to form the LLC$100check it at legislature.idaho.gov, October 2026
Registered agentYes, the law says socheck it at legislature.idaho.gov, October 2026
Annual reportNo feecheck it at legislature.idaho.gov, October 2026
State fees, years one to three$100Rows above, totaled
We add the formation filing, two later reports and any minimum tax to reach the three-year number. Costs that have no fixed price don't go in.

Also worth knowing

What's the processing time?

About 7 to 10 days.

Is the EIN application part of the price?

You'd pay $99 at ID Registered Agent.org or $99 at Idaho Registered Agent.co, and nothing extra at Mainstay Filing.

After three years, what have I paid?

Over three years you'd pay $397 at ID Registered Agent.org, $597 at Mainstay Filing, $397 at Idaho Registered Agent.co, not counting state fees.

Where did you get these numbers?

Official Idaho sources on the state side and company pricing on the service side, all dated.

Does the state make me use a service?

No law says you must hire anyone.

What's the best LLC service for Idaho?

ID Registered Agent.org wins on cost across three years, ahead of Mainstay Filing and Idaho Registered Agent.co.

Where we got this

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