Mainstay Filing takes the top spot because $199 prepares the Idaho registration and the registered agent role costs nothing in year one, then $149 a year.
When the complimentary year ends, the agent charge becomes $149 a year in any state.
Its three-year total is $100 above ID Registered Agent.org's, and what the price covers justifies that gap for us.
In the price
- The foreign registration handled on your behalf
- Registered agent service is free for the first year
- Same-business-day scans of anything served on the company, with no fee
Good
- $199 service fee, with the state's fee added
- The same price in each of the fifty states
- Papers served on the company are scanned the same business day at no charge
- No charge for registered agent service in year one
Watch for
- The agent is $149 a year after year one, $50 above ID Registered Agent.org
ID Registered Agent.org makes the list at number two because the Idaho registration is $199 and includes year one as agent, with $99 a year after that.
The registered office is an in-state street address supplied by the plan, and any papers served on the company show up as scans in your online account.
In the price
- Filing with the state
- A first year as your registered agent
Good
- A $199 price on top of the registration fee
- First-year registered agent service is part of the deal
- Keeps the agent for $99 a year from year two
Watch for
- Idaho only; your home state needs its own agent
- The EIN application is an extra charge ($99)
Idaho Registered Agent.co makes the list at number three because the Idaho registration is $199 and includes year one as agent, with $99 a year after that.
The registered office is an in-state street address supplied by the plan, and any papers served on the company show up as scans in your online account.
The published prices and features of ID Registered Agent.org and Idaho Registered Agent.co are identical, so the order between them is a coin flip between solid options.
In the price
- Filing with the state
- One year of registered agent service to start
Good
- The registered agent role is free for the first year
- $199 for the service, state fee extra
- $99 a year afterward for the agent
Watch for
- Idaho only; your home state needs its own agent
- The EIN application is an extra charge ($99)
The 3 picks side by side
Filing Shortlist sets each score out of 10 itself, using the criteria on How we rank; no customer ratings feed in.
Idaho foreign registration service pricing in 2026: first year, renewals, three-year total
Every price comes from the company's own pages as of November 12, 2026. The $100 Idaho registration fee comes on top of each row and is left out of the totals.
Why these made the shortlist
On Filing Shortlist's shortlist, three-year price and what the price covers carry 28% each and renewal terms, fit for the state and price clarity share the other 44%. In Idaho, what the price covers made the difference.
Registering in a second state touches two states, and one provider with one price in both scored highest on coverage, ahead of ID Registered Agent.org.
Every criterion and weight is set out on How we rank.
Registering a foreign LLC in Idaho: fee, form and office
Registration goes to the Idaho Secretary of State, Business Services on the Foreign Registration Statement. The state fee is $100. Along with the form, Idaho expects certificate of existence (certificate of good standing) from the home state, no older than 90 days when you file.
Each year after that, the company files the annual report, due before the end of the month in which the LLC registered.
What to have ready before you file
- Certificate of existence (certificate of good standing) from the home state, dated within 90 days of filing.
- The company's exact legal name and its formation date in the home state.
- A registered agent at a street address in the state. Every company on this shortlist can be that agent.
- Payment of the $100 state fee with the filing.
- A reminder in your own calendar for the annual report.
The cost of skipping Idaho registration
An unregistered out-of-state LLC cannot sue in Idaho courts (Idaho Code 30-21-502(b)). Its contracts remain valid (Idaho Code 30-21-502(c)).
Common questions about Idaho foreign registration services
Must an LLC from another state register in Idaho?
It must, once it does business in the state. An unregistered company cannot sue in the state's courts until it does.
What is the full price of a foreign LLC registration in Idaho?
The state fee is $100, and service fees run $199.
Does Idaho ask for proof of good standing from home?
It does. The state wants certificate of existence (certificate of good standing) from the home state, dated no more than 90 days before the filing.
Does a registered foreign LLC still need a registered agent?
Yes. The company keeps a registered agent in the state, at a street address there, for as long as it stays registered.
Which foreign registration services made this shortlist?
Mainstay Filing ($199), ID Registered Agent.org ($199) and Idaho Registered Agent.co ($199), listed from the top pick down.
Which service leads the Idaho foreign registration shortlist?
Mainstay Filing, because the fee is $199 plus the state's own, with a free first year as registered agent, and the price is identical in every state.
Where the figures come from
- Idaho yearly filing: Annual report: due date, official source (checked again October 2026)
- Idaho Code § 30-25-201 (checked again August 2026)
- Idaho formation fee: Filing fee, official source (checked again October 2026)
- Idaho formation fee: Filing fee, official source (checked again October 2026)
- Idaho registered agent statute (checked again October 2026)
- Idaho Secretary of State, Foreign Registration Statement (checked again October 2026)
- Idaho Secretary of State, business FAQ (checked again October 2026)
- Idaho Code 30-21-505, activities that are not doing business (checked again October 2026)
- Idaho Code 30-21-213, annual report (checked again October 2026)
- Withdrawal of Foreign Registration Statement (checked again October 2026)
- Idaho Code 30-21-502, registration to do business (checked again November 2026)
- Pulled from Mainstay Filing: Idaho service page, November 12, 2026
- Pulled from ID Registered Agent.org: pricing and service pages, November 12, 2026
- Pulled from Idaho Registered Agent.co: pricing and service pages, November 12, 2026