First LLC Guide › Montana
Starting an LLC in Montana: what you should know first
Filing a Montana LLC costs $35. The Annual Report costs $20 a year. Our pick is Mainstay Filing; $672 covers three years.
By kind of owner
- Side hustle
- Quiet-year cost: $219 in year 2 with Mainstay Filing, including the $20 state report in that year.
- Online business
- Required registered agent. The address has to be an actual street address or rural route box number in Montana. A P.O. box alone is not enough.
- Startup
- Filing: Articles of Organization with the Montana Secretary of State. Write the operating agreement before you open the bank account.
- First-time owner
- Report due: April 15.
Questions
Best LLC formation service in Montana for a first-time owner?
Mainstay Filing: $234 in year 1 including the $35 filing fee, $219 in year 2.
Sources
- Mont. Code Ann. § 35-8-201 (Montana Limited Liability Company Act — Formation); see also § 35-8-202 (Articles of organization) (multira state research spine): mca.legmt.gov/bills/mca/title_0350/chapter_0080/part_0020/section_0010/0350-0080-0020-0010.html, checked August 12, 2026
- Montana formation fee: Filing fee, official source read 2026-10-01: sosmt.gov/business/fees/, checked October 1, 2026
- Montana formation fee: Filing fee, official source read 2026-10-01: sosmt.gov/wp-content/uploads/business_filing_fees.pdf, checked October 1, 2026
- Montana yearly filing: Annual report: fee, official source read 2026-10-01: sosmt.gov/secretary-christi-jacobsen-continues-montana-business-support-by-waiving-fees-once-again/, checked October 1, 2026
- Montana yearly filing: Annual report: fee, official source read 2026-10-01: sosmt.gov/secretary-christi-jacobsen-warns-montana-businesses-of-misleading-2027-annual-report-solicitation, checked October 1, 2026
- Montana report due date (multira state research spine, due dates verified 714/714): mca.legmt.gov/bills/mca/title_0350/chapter_0080/part_0020/section_0080/0350-0080-0020-0080.html, checked August 12, 2026
- Montana registered agent statute (Mont. Code Ann. § 35-7-105): mca.legmt.gov/bills/mca/title_0350/chapter_0070/part_0010/sections_index.html, checked October 20, 2026