LLC Review Desk's 2026 picks for registered agents in Idaho, favorite first, are ID Registered Agent.org ($99 a year), Mainstay Filing ($149 a year) and Idaho Registered Agent.co ($99 a year). ID Registered Agent.org is our favorite, because it focuses on Idaho at $99 a year and gives you an in-state street address for the registered office.
By the LLC Review Desk editorial team
Position 1
Best here
1. ID Registered Agent.org: best for the smallest yearly price on this list
$99 a year, the same each year
Our score
9.1out of 10
9.1 out of 10
Our favorite is ID Registered Agent.org, because you pay a flat $99 a year, and papers served on the company are scanned into your account.
ID Registered Agent.org takes care of the registered office with a street address in the state and scans everything served there.
Over three years it costs less than Mainstay Filing, and cost is one of our two biggest criteria.
In the price
A street address in the state for your registered office
Served documents get scanned and sit in your online account
What we like
Costs less a year than Mainstay Filing
A $99 yearly plan that stays steady
LLC formation with year-one agent service included
Every score out of 10 is our editors' call, made with the weighted criteria on How we rank, not a customer rating.
What Idaho registered agents cost in 2026: year one, renewals and three years
Service
First year
Second year
Third year
Three-year total
Same price when you renew
ID Registered Agent.org
$99
$99
$99
$297
Yes
Mainstay Filing
$149
$149
$149
$447
Yes
Idaho Registered Agent.co
$99
$99
$99
$297
Yes
We took each price from the company's own pages on November 12, 2026. Idaho's own fees stay the same no matter which agent you choose.
How the order came together
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 $297 over three years, which is $150 less than Mainstay Filing. If you only need an agent in Idaho, fifty-state reach doesn't help much, so the lower yearly price won.
You can read every criterion and weight on How we rank.
What Idaho says about the registered agent (via Idaho Secretary of State)
Every LLC must name a registered agent with an in-state street address. The address has to be a physical street address in Idaho. P.O. boxes and commercial mailboxes are not accepted. The law: Idaho Code § 30-21-404.
The Idaho annual report: when and how much
Here's the schedule: the annual report is due every year in Idaho, by last day of the entity's anniversary month. It costs nothing. Reminders from the state go to your registered agent.
Your questions about Idaho registered agents
Do I really need a registered agent for an Idaho LLC?
You do. Idaho won't accept an LLC without a registered agent who has a street address in the state, and that name goes on the public record.
What do Idaho registered agents usually cost per year?
Plan on $99 to $149 a year, and each service keeps its price when you renew.
Can I be my own registered agent?
Sometimes, if you meet the state's rules. An Idaho resident, or a business entity authorized to do business in Idaho. An assumed business name (DBA) cannot serve.
When do I have to send in the Idaho annual report?
Mark last day of the entity's anniversary month on your calendar. There is no state charge.
Which registered agents did we review here?
ID Registered Agent.org ($99 a year), Mainstay Filing ($149 a year) and Idaho Registered Agent.co ($99 a year), with our favorite first.
Who is the best registered agent for Idaho?
ID Registered Agent.org, because it's $99 a year, and the price stays put at renewal, the smallest yearly price among these picks.