Corporation · Idaho · 2026

What a corporation really costs in Idaho

Every state fee and deadline for a corporation in Idaho, from the official state source, checked October 2026.

To form

$100

Articles of Incorporation (General Business Corporation)

First year with the state

~$130

Filing + one round of required reports and minimum taxes

With Incorra

$100

Free filing, state fee at cost. Or $349 with Plus (agent + reports, $249/yr).

Every recurring requirement

  • Idaho annual reportEvery year in the month you formed (by month-end). No fee. Due by the last day of the incorporation-anniversary month, starting the year after formation (Idaho Code 30-21-213).No fee
  • Idaho corporate income tax (Form 41) minimumEvery year by April 15. Minimum $20 corporate income tax plus $10 permanent building fund tax on Form 41 (Form 41S for S corps: $20 min + $10 PBF); due 15th day of 4th month after year end (Apr 15 for calendar year).$30

Questions

How much does it cost to form a corporation in Idaho?

Idaho charges $100 to file the Articles of Incorporation (General Business Corporation).

What does a corporation cost every year in Idaho?

Idaho annual report: no fee, every year in the month you formed (by month-end) (No fee. Due by the last day of the incorporation-anniversary month, starting the year after formation (Idaho Code 30-21-213).). Idaho corporate income tax (Form 41) minimum: $30, every year by April 15 (Minimum $20 corporate income tax plus $10 permanent building fund tax on Form 41 (Form 41S for S corps: $20 min + $10 PBF); due 15th day of 4th month after year end (Apr 15 for calendar year).).

What if my corporation was formed in another state?

To do business in Idaho you register as a foreign entity: Foreign Registration Statement, $100.

Not sure a corporation is right?

Describe your business and Incorra compares LLC, S-corp and C-corp with your numbers, including the tax when you sell, then files it in Idaho.

Plan my company free

Source: https://sos.idaho.gov/business-forms/ · verified 2026-10-15. State fees change; Incorra re-checks them regularly. General information, not legal or tax advice.