Corporation · Montana · 2026

What a corporation really costs in Montana

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

To form

$35

Articles of Incorporation (profit)

First year with the state

~$105

Filing + one round of required reports and minimum taxes

With Incorra

$35

Free filing, state fee at cost. Or $284 with Plus (agent + reports, $249/yr).

Every recurring requirement

  • Montana corporation annual reportEvery year by April 15. Due April 15; $20 on time, $35 late. Fee waived for on-time 2026 and 2027 reports.$20
  • Montana corporate income tax (minimum $50)Every year by May 15. Form CIT due 15th day of 5th month after FYE; $50 minimum tax per corporation (C corps; S corps file Form CLT-4S instead).$50

How fast

  • 24-hour priority handling+$20
  • 1-hour expedite+$100

Questions

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

Montana charges $35 to file the Articles of Incorporation (profit).

What does a corporation cost every year in Montana?

Montana corporation annual report: $20, every year by April 15 (Due April 15; $20 on time, $35 late. Fee waived for on-time 2026 and 2027 reports.). Montana corporate income tax (minimum $50): $50, every year by May 15 (Form CIT due 15th day of 5th month after FYE; $50 minimum tax per corporation (C corps; S corps file Form CLT-4S instead).).

Can I expedite a corporation filing in Montana?

Yes: 24-hour priority handling for $20, 1-hour expedite for $100, on top of the filing fee.

What if my corporation was formed in another state?

To do business in Montana you register as a foreign entity: Certificate of Authority (foreign profit corporation), $70.

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 Montana.

Plan my company free

Source: https://sosmt.gov/wp-content/uploads/business_filing_fees.pdf · verified 2026-10-15. State fees change; Incorra re-checks them regularly. General information, not legal or tax advice.