Form an LLC by State

Form an LLC by State › Idaho

Cheapest and fastest way to file an LLC in Idaho (2026)

Filing an LLC in Idaho costs $100 in state fees. The fastest route listed is same day (by 1 p.m. mountain), +$100 on top of the filing fee ($200 all in). Mainstay Filing, our best overall pick, files it for you and keeps the registered agent.

  • Official sources, checked October 20, 2026

Cheapest vs fastest in Idaho

RouteWhat you getState cost
CheapestAbout 7 to 10 days$100
Fast, no extra feeNone listed—
Paid laneExpedited (about 8 business hours)$140
Paid laneSame day (by 1 p.m. Mountain)$200

Paid lanes are the filing fee plus the expedite fee. The yearly report is free afterwards.

What the Idaho Secretary of State says

"Business Filings are currently being processed approximately 7-10 days from the date of filing." Current estimates are on the SOSBiz Processed Through Date page.

Processing, read October 1, 2026

Form: "If expedited service is requested, add an additional $40.00 ... If 'same day' service is requested, add $100.00." FAQ: expedited "is typically processed within 8 business hours"; "Same-day service requests must be received by 1 p.m. Mountain Time."

Expedite, read October 1, 2026

Best overall in Idaho

Mainstay Filing

Our rating: 4.9 out of 5

$199 / year, same at renewal

  • LLC formation, prepared and filed
  • Registered agent, all year
  • EIN application (with an SSN or ITIN)
  • Annual report filed every year it is due where the state requires one
  • Compliance reminders and stored documents

Price from the Mainstay Filing pricing and FAQ pages, checked October 21, 2026. State fees are passed through at cost and shown before you pay.

Questions

What is the cheapest way to file an LLC in Idaho?

The cheapest route is the plain filing at $100, with the state’s stated turnaround of about 7 to 10 days.

What is the fastest way to file an LLC in Idaho?

The fastest route listed is same day (by 1 p.m. mountain), +$100 on top of the filing fee ($200 all in).

How much does it cost to expedite a Idaho LLC?

The state lists 2 options: expedited (about 8 business hours) (+$40); same day (by 1 p.m. mountain) (+$100).

Sources