Montana business filing due dates
The Montana deadlines Ordexly tracks for Oct 2026 to Oct 2027. Every date links to the agency page it was checked against (last checked ). Which ones apply to a business depends on its registrations and filing frequency, so confirm with the agency.
Annual reports & franchise tax
| Due | Deadline | Source |
|---|---|---|
| Montana Annual Report (foreign entities) 2026 | official source | |
| Montana Annual Report (domestic entities) 2026 | official source |
Payroll & withholding
| Due | Deadline | Source |
|---|---|---|
| Montana MW-1 withholding payment (monthly schedule) (monthly) Oct 2026 Moved from Sun, Nov 15 (weekend). | official source | |
| Montana MW-1 withholding payment (monthly schedule) (monthly) Nov 2026 | official source | |
| Montana MW-1 withholding payment (monthly schedule) (monthly) Dec 2026 | official source | |
| Montana MW-1 withholding payment (monthly schedule) (monthly) Jan 2027 | official source | |
| Montana MW-1 withholding payment (monthly schedule) (monthly) Feb 2027 | official source | |
| Montana MW-1 withholding payment (monthly schedule) (monthly) Mar 2027 | official source | |
| Montana MW-1 withholding payment (monthly schedule) (monthly) Apr 2027 Moved from Sat, May 15 (weekend). | official source | |
| Montana MW-1 withholding payment (monthly schedule) (monthly) May 2027 | official source | |
| Montana MW-1 withholding payment (monthly schedule) (monthly) Jun 2027 | official source | |
| Montana MW-1 withholding payment (monthly schedule) (monthly) Jul 2027 Moved from Sun, Aug 15 (weekend). | official source | |
| Montana MW-1 withholding payment (monthly schedule) (monthly) Aug 2027 | official source | |
| Montana MW-1 withholding payment (monthly schedule) (monthly) Sep 2027 | official source |
Unemployment / reemployment
| Due | Deadline | Source |
|---|---|---|
| Montana UI-5 quarterly UI report (quarterly) Q3 2026 | official source | |
| Montana UI-5 quarterly UI report (quarterly) Q4 2026 | official source | |
| Montana UI-5 quarterly UI report (quarterly) Q1 2027 | official source | |
| Montana UI-5 quarterly UI report (quarterly) Q2 2027 | official source |
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Nearby: Idaho due dates · North Dakota due dates · South Dakota due dates · Wyoming due dates
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