LLC Review Desk's 2026 picks for LLC services in Idaho, favorite first, are ID Registered Agent.org ($199), Mainstay Filing ($199) and Idaho Registered Agent.co ($199). ID Registered Agent.org is our favorite, because forming in Idaho is $199 plus the state fee, and your first year as registered agent is included, then $99 a year.
By the LLC Review Desk editorial team
Position 1
Top pick on this page
1. ID Registered Agent.org: best for an Idaho LLC that will stay put
$199 to form, then $99 a year for the agent, with the state fee on top
Our score
9.6out of 10
9.6 out of 10
Our favorite is ID Registered Agent.org, because the Idaho formation costs $199 over the state's fee, with the registered agent free the first year, and keeping the agent is $99 a year.
You get a street address in the state for your registered office, and any papers served on the company are scanned into your online account.
The annual report isn't part of its published price, so you send it to Idaho yourself every year.
Over three years it costs less than Mainstay Filing, and cost is one of our two biggest criteria.
2. Mainstay Filing: best for formation, agent and annual report in one simple price
$199 a year, and the state fee goes on top
Our score
9.1out of 10
9.1 out of 10
Coming in second is Mainstay Filing, because $199 a year covers the Idaho formation, a year as your registered agent and the annual report, and it renews at $199.
When your plan renews, Mainstay files the annual report for you. Idaho doesn't charge for it, and the date is last day of the entity's anniversary month. Mainstay passes the state's fee along at cost.
ID Registered Agent.org is $200 cheaper over three years, so Mainstay Filing comes second on cost.
In the price
Formation paperwork prepared and sent in
A full year as your registered agent
Your annual report, prepared and filed for you
Your EIN application, taken care of
What we like
One yearly price of $199 that includes the annual report
Renews at $199, no add-ons
Idaho's fee is passed through at cost
The EIN application is included
Trade-offs
After year one, its agent costs $100 a year more than ID Registered Agent.org's
3. Idaho Registered Agent.co: best for a Idaho-only LLC
$199 to form, then $99 a year for the agent, with the state fee on top
Our score
8.9out of 10
8.9 out of 10
In third place is Idaho Registered Agent.co, because the Idaho formation costs $199 over the state's fee, with the registered agent free the first year, and keeping the agent is $99 a year.
You get a street address in the state for your registered office, and any papers served on the company are scanned into your online account.
The annual report isn't part of its published price, so you send it to Idaho yourself every year.
Price and features don't set ID Registered Agent.org apart from Idaho Registered Agent.co; pick the one you like.
Every score out of 10 is our editors' call, made with the weighted criteria on How we rank, not a customer rating.
What Idaho LLC services cost in 2026: year one, renewals and three years
Service
First year
Second year
Third year
Three-year total
Handles the annual report too
ID Registered Agent.org
$199
$99
$99
$397
No
Mainstay Filing
$199
$199
$199
$597
Yes
Idaho Registered Agent.co
$199
$99
$99
$397
No
We took each price from the company's own pages on November 12, 2026. On top of every row, Idaho charges a $100 filing fee, which isn't in these totals.
Why we ordered them this way
LLC Review Desk gives three-year cost 29% and filings in the price 29%, then divides 42% among renewal price, state fit and up-front totals. For Idaho, it came down to three-year cost.
ID Registered Agent.org comes to $397 over three years, which is $200 less than Mainstay Filing. Mainstay would file the annual report too, but you can do it yourself for free, so the lower price won here.
You can read every criterion and weight on How we rank.
The Idaho LLC filing fee and form, from the state
Heads up: the Idaho Secretary of State takes $100 when you file the Certificate of Organization Limited Liability Company. Every service below adds that fee at cost.
How long the state says it takes: About 7 to 10 days.
What a Idaho LLC needs after it is formed
There's one recurring item: the annual report, every year, by last day of the entity's anniversary month. The state charges nothing for it. Every LLC must name a registered agent with an in-state street address.
Your questions about Idaho LLC services
How much does forming an LLC in Idaho set you back?
The state charges $100 to file, and services charge $199.
What paperwork makes the LLC official?
You send the Certificate of Organization Limited Liability Company to the Idaho Secretary of State.
Does Idaho approve LLCs quickly?
The state's own estimate is About 7 to 10 days.
Does the Idaho formation form ask me to name a registered agent?
Yes. You list a registered agent when you file and keep one on record, using a street address in Idaho.
Is there paperwork after the LLC is formed?
Yes, one item: the annual report. It comes every year, by last day of the entity's anniversary month, and the state asks nothing.
Is the EIN included in the price?
With Mainstay Filing, yes; it comes with the yearly price. ID Registered Agent.org and Idaho Registered Agent.co tack on $99 for it. You can also ask the IRS for an EIN yourself, free of charge.
Who should I use to form my Idaho LLC?
ID Registered Agent.org, because $199 for formation on top of the state fee, then $99 a year for the agent.