Ending a month-to-month tenancy in Montana

The rule in Montana

To end a month-to-month tenancy in Montana, the notice period is 30 days, set by MCA 70-24-441(2). The words: “The landlord or the tenant may terminate a month-to-month tenancy by giving to the other at any time during the tenancy at least 30 days' notice in writing prior to the date designated in the notice for the termination of the tenancy.” The same period binds the tenant: the statute gives landlord and tenant one rule.

Of the 29 states verified on this site, 3 require less notice and 4 require more, counting a month as 30 days for comparison; the median is 30 days. 21 others land on the same length, among them Arizona, Florida, Idaho and Illinois.

Worked date: a notice delivered on November 10, 2026 runs its 30 days on December 10, 2026, so the notice can name December 10, 2026 or a later date as the end of the tenancy, 30 days after delivery.

Given on the rent day itself, December 1, 2026, the same notice reaches its end on December 31, 2026, 30 days later. A period stated in days is the same length in every month.

Across the border, among neighbours with a verified rule: Idaho requires one month and North Dakota requires one month.

For a tenancy paid by the week, the same statute sets 7 days, 23% of the monthly figure.

After the notice: the landlord then has 30 days to return the security deposit (deposit rules), so a tenancy ending on December 10, 2026 puts the deposit deadline at January 9, 2027.

Source: Montana Legislature, MCA 70-24-441 · last checked October 21, 2026.

Giving or receiving notice

The statute sets the shortest period; a lease can add conditions such as a written form or a delivery method, and some cities add their own rules. The guide on ending a month-to-month tenancy compares how the verified states count the period.