How does a Montana landlord lawfully end a tenancy, and when may a tenant leave early?

Landlord: 30 days. Tenant: 30 days.

The party ending the tenancy names the date in the written notice, and the notice must be given at least 30 days before that date for a month-to-month tenancy or at least seven days before it for a week-to-week tenancy. Montana then answers the alignment question outright, which most states leave open: the tenancy ends on the date designated and without regard to the expiration of the period for which rent is payable, and unless the parties agree otherwise rent is apportioned uniformly from day to day. So a notice given on the 12th can end a month-to-month tenancy on the 11th of the next month, and the last month's rent is prorated.

The termination date may fall on any day.

Tiers: Two tracks by tenancy type: 30 days for a month-to-month tenancy and seven days for a week-to-week one, the same in both directions. Which one applies is set by default: unless the rental agreement fixes a definite term, the tenancy is week to week for a roomer who pays weekly rent and month to month in every other case. Nothing turns on how long the tenant has lived there, the building, the landlord's other holdings, or the county.

A lease may not change the period. A rental agreement may not provide that a party agrees to waive or forego rights or remedies under the chapter. The bar runs both ways here, because it is written as a limit on what either party may agree to, so neither the landlord's 30 days nor the tenant's can be cut by the lease. There is no separate rule stopping the parties from agreeing to a longer period.

A statute requires the landlord's and tenant's periods to be equal, or bars a lease from imposing a longer period on one side.

Source of the period: a termination-notice statute states it.

Either the landlord or the tenant may end a month-to-month tenancy by giving the other, at any time during the tenancy, at least 30 days' written notice before the date designated in the notice, and a week-to-week tenancy on at least seven days' written notice. One sentence grants each period to both sides, so the periods are symmetric and no reason has to be given. The seven-day track is narrower than a weekly rent alone would suggest: a roomer is defined as a person occupying a unit that does not include a toilet, a bathtub or shower, a refrigerator, a stove or a kitchen sink supplied by the landlord, or where one or more of those is shared with other occupants of the building. Montana's older general landlord-tenant law still states a one-month notice for a tenancy at will, but it is the landlord's notice only, and it governs only the tenancies the residential act does not reach.

No: no statewide rule requires a reason, and no statute expressly authorizes local ordinances.

Local ordinances: no statute or decision addresses them. The residential landlord and tenant chapter contains no preemption clause and no authorization of local ordinances: nothing in it mentions counties, cities or ordinances at all, so the state neither blocks nor permits a local just-cause rule in terms. This answer rests on the landlord-tenant chapter; the local-government title is outside its scope. Local rent regulation is a separate question carried on the rent-increase page.

No reason is required to end a periodic tenancy or to let a fixed term expire in Montana. The holdover statute confirms it from the other direction by pricing the case where the landlord terminates the rental agreement without cause and issues a lawful 30-day notice: a statute that sets damages for a no-cause termination presupposes that a no-cause termination is lawful. The real constraint on a landlord's motive is the retaliation rule, and Montana's is unusually strong. A landlord may not retaliate against a tenant who complained to a code-enforcement agency, complained to the landlord in writing about the condition of the premises, or organized or joined a tenants' union, by raising the rent, cutting services, or bringing or threatening to bring an action for possession. A complaint within the six months before the landlord acts creates a rebuttable presumption of retaliation, and the statute defines that term itself: the trier of fact is required to find the presumed fact unless and until evidence supporting its nonexistence is introduced. The presumption does not arise where the tenant complained after being told of a proposed rent increase or a reduction in services, and the bar does not apply where the tenant caused the code violation by a lack of reasonable care, where the tenant is in default in rent, or where compliance would require alteration, remodeling or demolition that would deprive the tenant of the unit. Retaliation is covered on the habitability page.

A statute converts the tenancy to a periodic one after the term by operation of statute.

The 30 days here run the opposite way from a non-renewal notice: they are the condition that stops the lease rolling over, not a duty owed before it ends. If the lease sets no default extension period, then unless one side gives the other 30 days' written notice to terminate before the original termination date, the tenancy continues month to month. A landlord who wants a fixed term to actually end on its date, and who wrote no default extension period into the lease, has to give that notice; otherwise the tenancy rolls and must then be ended on the ordinary 30 days.

The rollover happens by statute, on two conditions: the rental agreement fixed no default extension period, and neither party gave the 30 days' written notice before the original termination date. A lease that sets its own default extension period displaces the statutory month-to-month result, and the parties may choose renewal for a further term, a shorter or longer set term, a month-to-month arrangement, or termination. Until 2017 the statute made that choice a required menu the tenant picked from before signing; the legislature struck those subsections and left only the fallback, which is why it now reads as a default rather than a duty.

A Montana fixed-term lease does not simply lapse. Where the agreement sets no default extension period and neither side gives 30 days' written notice before the original termination date, the tenancy continues on a month-to-month basis by operation of the statute, and either side then ends it on the ordinary 30 days. Neither side owes a reason. Montana has no statute requiring a reminder before an automatic-renewal clause takes effect; the extension rule is a default about what happens in silence rather than a notice duty owed to the tenant.

A tenant who remains in possession without the landlord's consent after the term expires or the tenancy is terminated is a holdover, and the landlord may bring an action for possession; the answer is due five business days after service of the summons and complaint. With the landlord's consent the tenancy converts instead, to week to week for a weekly-paying roomer and month to month otherwise.

Damages: An enhanced measure that attaches only to a wilful or bad-faith holdover. Qualifiers: the multiple is a maximum, not the award; the award is the greater of two measures; and the statute deems the holdover wilful on stated facts.

Two routes to the same ceiling. Where the term was longer than month to month and the landlord terminated with cause, the landlord may recover not more than three months' periodic rent or treble damages, whichever is greater, but only if the holdover was purposeful and not in good faith. Where the tenancy was month to month and the landlord terminated without cause on a lawful 30-day notice, a tenant who stays past the termination date is treated by the statute as holding over purposefully, and the same ceiling applies without any separate finding. The figure is a maximum a court may award, not a fixed sum, and it is additional to possession.

Yes: a statute imposes the duty.

When it attaches: The chapter-wide duty runs to any aggrieved party and governs every remedy the chapter provides, so it attaches whenever the landlord claims damages after a tenant leaves early, whether or not the departure counts as abandonment. The abandonment section then supplies the concrete duty and fixes the date the tenancy ends.

Burden of proof: no authority allocates it.

The standard: The chapter-wide duty is stated bare. The abandonment section supplies the only standard Montana prints: where the tenant abandons the unit, the landlord shall make reasonable efforts to rent it at a fair rental. If the landlord re-rents for a term beginning before the agreement would have expired, the agreement terminates as of the date the new tenancy begins. If the landlord fails to use reasonable efforts, or accepts the abandonment as a surrender, the agreement is terminated by the landlord as of the date the landlord had notice of the abandonment. On a month-to-month or week-to-week tenancy the term counted for this purpose is a month or a week.

No authority addresses a clause accelerating the remaining rent.

The lease may not waive the duty.

Montana imposes the duty twice over. The first section of the chapter's remedies part says the chapter's remedies must be administered so that an aggrieved party may recover appropriate damages, that the aggrieved party has a duty to mitigate damages, and that the party may include a reasonable charge for the party's own labor. That duty is chapter-wide and runs both ways. The abandonment section is then the specific mechanism, with the reasonable-efforts standard and the termination dates described above. The one-month cap on early-termination damages does not displace the duty; the same clause that sets the cap tells landlords to follow the abandonment section, so the two operate together, and the landlord is entitled to rent only up to the date a new tenancy starts or the date the lease term expires. Neither section says who must prove that reasonable efforts were or were not made. Nothing addresses a clause accelerating the remaining rent on default; the backstop is the rule voiding any agreement to give up a right or remedy under the chapter.

A statute caps what an early-termination fee may be.

The cap: One month's rent, and the cap binds both sides. Where either party terminates the rental agreement without cause before the lease term expires, the aggrieved party is entitled to monetary damages of up to one month's rent, or an amount agreed on in the rental agreement which may not exceed one month's rent. The ceiling is mandatory rather than a default the lease can raise: it caps the agreed figure inside its own words, and a separate provision voids any agreement by which a party gives up a right or remedy under the chapter. Only the amount below the ceiling is negotiable. The cap has been law since 2021, not 2025, and it is Montana's whole early-termination fee rule; the state has no separate fee statute.

Cap on damages after an early departure: The same clause caps what either side can recover for an uncaused early termination at one month's rent, and it adds a second limit on the landlord: the landlord is entitled to rent from a defaulting tenant only up to the date a new tenancy starts or the date the rental agreement term expires, whichever comes first. The same sentence directs landlords to follow the duty to re-rent at a fair rental, so the cap and that duty work together.

Montana has the strongest early-termination rule in the country and it runs in both directions: whoever ends the lease without cause before its term expires owes the other side no more than one month's rent, and a lease may set a lower figure but not a higher one. The landlord's recovery stops when a new tenancy starts or the term expires, and the landlord must make reasonable efforts to re-rent at a fair rental in the meantime. This prices leaving early; a tenant who instead stays past the end faces the separate holdover ceiling, and the two do not overlap. Montana's administrative rules cannot carry a competing fee rule, because the chapter gives no agency rulemaking authority over it and is enforced by private action instead; this answer rests on the statutes rather than on the rules.

Early-exit rights by ground: domestic violence and related grounds, no statute; military service beyond the federal act, state orders or National Guard duty are covered and a deployment or transfer threshold below the federal act's; death of the tenant, no statute; and other statutory grounds.

Domestic violence and related grounds: no statute gives a victim a right to end the lease early.

No Montana statute lets a victim of domestic violence, sexual assault, stalking or human trafficking end a residential lease early. There is no right to terminate, no defense to a claim for rent, no release from rent, no lock-change right, no confidentiality duty on the landlord, and no protection against the termination being held against the tenant later. A victim in Montana is on the ordinary rules: the 30 days on a month-to-month tenancy, or the one-month cap on damages for leaving a fixed term early. The one provision in the landlord-tenant chapter that touches the subject runs the other way. A notice of no contact between a landlord and a tenant is valid only where it rests on a court order, either a no-contact order in a partner or family member assault case or an order of protection; an out-of-court notice of no contact between them is invalid. A court no-contact order in an assault case is a criminal-law order that lasts 72 hours or until the defendant's first appearance unless continued, may impose a distance restriction, and says nothing about the lease, the rent, or the landlord's obligations.

Military service: State orders or National Guard duty are covered and a deployment or transfer threshold below the federal act's.

When the state rights attach: The state right runs to members of the Montana Army or Air National Guard on active duty, meaning at least 14 consecutive days of full-time state military duty or full-time National Guard duty. The termination right itself belongs to the service member; a dependent, meaning a spouse, a minor child or anyone else legally dependent on the member for support, gets the separate court relief rather than the right to end the lease.

Montana writes its own National Guard civil relief rules rather than adopting the federal act, and they differ from it on every axis. A service member on active duty may terminate any residential lease when ordered to a permanent duty station more than 60 miles from the member's current residence. The member delivers written notice of termination together with a copy of the military orders, by hand, by mail or by electronic means, and the termination is not effective until 45 days after delivery. A member who terminates this way is not liable for early-termination fees or other damages arising from the early termination, which is one of the few places in American landlord-tenant law where the fee bar is written out in terms. Two things follow that a reader needs together: the state threshold is far below the federal one, because 14 consecutive days of duty and a 60-mile move are enough where the federal act asks for a permanent change of station or a deployment of 90 days or more; but the state termination bites later, 45 days after notice, so a member holding federal orders may do better under the federal route. Separately, a court may stay for up to three months, adjust, or defer the payments due in a civil action against a service member or a dependent over the member's or dependent's primary residence for nonpayment on a mortgage, lease or rental agreement, unless the ability to pay is not materially affected by the active duty.

Death of the tenant: No statute gives a right to end the lease on the tenant's death.

Other grounds: One further statutory ground exists. Where the dwelling or premises are damaged or destroyed by fire or casualty to an extent that enjoyment of the unit is substantially impaired, the tenant may immediately vacate and then notify the landlord in writing within 14 days of the intention to terminate, in which case the agreement ends as of the date of vacating; the sequence is the trap, because the tenant leaves first and gives notice afterward. The alternative, where continued occupancy is lawful, is to vacate only the part made unusable, with rent liability reduced in proportion to the loss in fair rental value. Neither is available where the damage was caused by the purposeful or negligent act of the tenant or the tenant's family or guests. On a termination the landlord must return all the security recoverable under the deposits chapter and all prepaid rent, with the accounting made as of the date of the fire or casualty. There is no senior, care-facility, disability, job-relocation or crime-victim ground. Ending a lease because the landlord failed to deliver possession, failed to maintain the premises, cut essential services, entered unlawfully, or shut the tenant out is covered on the habitability page, and manufactured-home lot tenancies have their own page.

Abandonment starts the landlord's re-letting duty rather than a presumption.

Montana has no abandonment presumption. No absence period ends a tenancy, and there is no notice of belief of abandonment for the landlord to serve or for the tenant to answer. Abandon is defined simply as giving up possession of the premises, unless the landlord does not accept the abandonment or surrender or the agreement has been terminated as provided by law. What abandonment actually does is start the landlord's duty to re-rent, and the tenancy then ends on one of two dates: the day a new tenancy begins, where the landlord re-rents before the term would have expired, or the day the landlord had notice of the abandonment, where the landlord fails to use reasonable efforts to re-rent at a fair rental or accepts the abandonment as a surrender. Two related rules sit nearby. During an absence of more than seven days the landlord may enter the unit at times reasonably necessary. And a lease may, but need not, require the tenant to give notice of an anticipated absence of more than seven days by the first day of it; where the lease says so and the tenant does not, the landlord may recover actual damages. What happens to property left behind is covered separately from this page, and the landlord must give the tenant those rules in plain language when the tenancy ends.

One rule covers notice under the chapter, and a person has notice of a fact where any of four things is true: the person actually knows it; in the landlord's case, it is delivered at the place of business through which the rental agreement was made; it is sent to an electronic mail address the tenant or landlord gave in the rental agreement; or it is delivered in hand, or mailed with a certificate of mailing or by certified mail, to the place the person named for receiving communications or, where none was named, to that person's last-known address. Posting on the door is not a method for a termination notice. The older general law has a different service rule, including posting, and it governs only the tenancies the residential chapter does not reach.

Electronic delivery: only with written consent, a read receipt, or a lease clause.

Mailing: 3 days are added to the period when the notice is mailed. Where the notice is sent with a certificate of mailing or by certified mail, service is considered to have been made three days after the date of mailing. That is a deemed service date rather than an outer limit, so the notice period runs from the fourth day and mailing genuinely adds three days. The rule reaches notices under the residential chapter generally, not only termination notices.

What the notice must contain: The notice must be in writing and must specify or designate the date the tenancy ends. There is no statutory form, no requirement to state a ground, and no advisory language.

Alternate address: Either party may name a place for receiving communications, and a notice delivered or mailed there counts; where none is named, the last-known address is used.

The residential landlord and tenant chapter cites no federal statute. Montana's own National Guard civil relief rules run alongside the federal servicemembers act rather than adopting it: they state their own trigger, their own duty threshold, their own notice rule and their own bar on early-termination fees, and never point at the federal statute. A member holding federal orders may therefore have a choice between the two routes, and the answers differ, so the federal act is not simply a floor that the state rules sit on top of.

The federal CARES Act 30-day notice to vacate for covered properties, as read in this state's courts: no state appellate decision construes it. Montana has no intermediate appellate court, so only the Montana Supreme Court could construe the federal 30-day notice for covered dwellings, and it has not published a decision that mentions the provision. Montana has not written the notice into its own statutes. The federal provision is unrepealed and unamended and applies of its own force to covered dwellings; how a Montana court would read its scope is an open question. (Appellate picture read as of September 4, 2026.)