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Free Montana Rent Increase Notice

Montana rent increase notice overview
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Montana has no rent control and no cap on how much you can raise the rent, and the Residential Landlord & Tenant Act of 1977 sets no special rent-increase notice statute – a rent increase is a change of terms. For a month-to-month tenancy, change the rent the way you change the tenancy: with at least 30 days’ written notice (Mont. Code Ann. 70-24-441), and never in retaliation (70-24-431). Generate a clean notice below.

30-day (month-to-month) 70-24-441 / 70-24-431 Montana Free PDF
Updated Q2 2026 By Tenant Screening Background Check Editorial Team Reviewed for Montana ~7 min read

This Montana Rent Increase Notice raises the rent on a residential tenancy. Montana sets no rent control and no cap on the amount, and its Residential Landlord & Tenant Act of 1977 (Mont. Code Ann. 70-24-101 et seq.) fixes no rent-increase notice period as such – an increase is a change of terms, and the change-of-terms statute sits outside the Act at Mont. Code Ann. 70-26-109: written notice at least 15 days before the expiration of the month, effective at the expiration of the month. In practice serve 30 days’ notice, which is what Mont. Code Ann. 70-24-441 would require to end a month-to-month tenancy (7 days week-to-week) if the tenant refuses the new rent, and the increase may not be retaliatory under 70-24-431. Our how to raise rent guide covers the timing, and the tenant screening laws by state hub helps you place reliable tenants in the first place.

Montana Rent Increase at a Glance

Statute

70-24-441 / 70-24-431

Statewide rent cap

None

Month-to-month notice

30 days (70-24-441)

Retaliation bar

Yes (70-24-431)

Montana note: Montana has no rent-control law and no statute that caps the amount of an increase – and Mont. Code Ann. 7-1-111(26) bars every local government unit from any power to control the amount of rent charged for private residential or commercial property (the only carve-out is property in which the local government, or its housing authority, holds an interest). The Residential Landlord & Tenant Act of 1977 sets no rent-increase notice period of its own, but the change-of-terms statute at Mont. Code Ann. 70-26-109 does: on a month-to-month letting the landlord may, on written notice given at least 15 days before the expiration of the month, change the terms of the lease – rent included – to take effect at the expiration of the month. Give 30 days in practice, because Mont. Code Ann. 70-24-441 requires that much to end a month-to-month tenancy (7 days week-to-week) if the tenant will not accept the new rent. A fixed-term rent cannot change until renewal unless the lease allows it, and 70-24-431 forbids raising rent in retaliation for a protected tenant action, with a 6-month rebuttable presumption.

Montana rent-increase rules at a glance

Montana does not cap rent or set a rent-increase notice statute. A rent increase is a change of terms. For a month-to-month tenancy, give at least 30 days’ written notice before the date the new rent takes effect – the same notice Mont. Code Ann. 70-24-441 uses to change or end the tenancy (7 days for week-to-week). You cannot raise rent during a fixed term unless the lease expressly allows it; otherwise the increase applies at renewal. Mont. Code Ann. 70-24-431 bars a retaliatory increase after a protected tenant action – a complaint within 6 months before the increase raises a rebuttable presumption of retaliation – though a good-faith increase is still allowed.

How to Serve the Montana Rent Increase Notice

Montana Playbook

Determine the required notice period

Confirm the tenancy and the lease. On a fixed-term lease the rent is locked unless the lease has an escalation clause, and any increase applies at renewal; a month-to-month tenancy can be raised prospectively with proper written notice.

Calculate the increase

Set the notice period from Mont. Code Ann. 70-24-441. A Montana rent increase is a change of terms under Mont. Code Ann. 70-26-109, whose floor is 15 days before the expiration of the month; give at least 30 days’ written notice before the date the new rent takes effect so the notice also satisfies the 70-24-441 period you would need to end the tenancy (7 days for a week-to-week tenancy) – and follow any longer notice the lease requires.

Prepare the written notice

Make sure the timing is not retaliatory. Mont. Code Ann. 70-24-431 bars raising the rent in response to a tenant’s complaint to a government agency about a health-and-safety code violation, a written complaint to you under 70-24-303, or the tenant organizing or joining a tenant’s union – and a complaint within 6 months before the increase raises a rebuttable presumption of retaliation.

Serve the notice

Put the increase in writing – the current rent, the new rent, and the effective date. Montana requires the 70-24-441 notice to be written, and Mont. Code Ann. 70-24-108 governs when notice is received; deliver it by a method you can prove.

Document and follow up

Keep a signed, dated copy and proof of delivery. If the tenant later disputes the increase, that record is what shows the notice was proper, the timing was clean, and the increase was not retaliatory.

Generate the Montana Notice

Complete the fields below to generate a Montana rent increase notice. The new rent and effective date must give the tenant the full statutory notice period. Service should comply with applicable Montana law; retain proof of service.

Set the effective date correctly

Count the full notice period from when the tenant receives the notice. For a month-to-month tenancy that is at least 30 days under Mont. Code Ann. 70-24-441 (7 days for week-to-week), and the new rent should take effect on or after the date designated in the notice once those days run. An effective date that arrives before the notice period closes makes the increase unenforceable for that period. Under Mont. Code Ann. 70-24-108 a mailed notice is treated as served 3 days after mailing, so allow that lead time when you mail, and follow any longer period the lease sets.

1. Parties & Property

From (Landlord / Property Manager)

To (Tenant)

2. Rent Change Details

Enter current and new rent to see the calculated increase.

3. Notice Details

4. Signature

About This Montana Notice

A Montana rent increase notice is the written notice a landlord gives to raise the rent on a residential tenancy. Montana is a market-rate state: there is no statewide rent control and no statutory cap on how much the rent can go up. State law goes a step further and forbids local rent control – Mont. Code Ann. 7-1-111(26) denies every local government unit any power to control the amount of rent charged for private residential or commercial property, with a narrow exception only for property in which the local government, or its housing authority, holds an interest (the 2023 Legislature reinforced this ban in Senate Bill 105, “Prohibit rent control of private property,” signed into law May 1, 2023). So there is no cap to worry about anywhere in the state. What the law does regulate is when an increase can take effect and why it is being made.

The Montana Residential Landlord and Tenant Act of 1977 (Mont. Code Ann. 70-24-101 and following) does not contain a rent-increase notice section of its own. In Montana a rent increase is treated as a change of the terms of the tenancy. On a fixed-term lease the rent is locked for the term: it cannot be raised mid-lease unless the lease itself contains an escalation clause, and any increase takes effect at renewal. On a periodic tenancy, the landlord changes the rent the same way the tenancy itself is changed or ended – under Mont. Code Ann. 70-24-441, the landlord or tenant may terminate a month-to-month tenancy by giving the other, at any time during the tenancy, at least 30 days’ notice in writing before the date designated in the notice, and may terminate a week-to-week tenancy on at least 7 days’ written notice. The practical rule, then, is at least 30 days’ written notice (or 7 days for a week-to-week tenancy) before the new rent starts.

Even with proper timing, an increase can still be unlawful because of its motive. Mont. Code Ann. 70-24-431 prohibits a landlord from retaliating against a tenant – including by increasing the rent or decreasing services – after the tenant complains to a governmental agency about a building or housing code violation that materially affects health and safety, complains to the landlord in writing about a violation under 70-24-303, or organizes or joins a tenant’s union or similar organization. If the tenant engaged in one of those protected actions within six months before the increase, the law creates a rebuttable presumption that the increase was retaliatory, which the landlord can overcome with evidence of a genuine, non-retaliatory reason. A tenant facing a retaliatory increase may raise retaliation as a defense and pursue the Act’s remedies. Federal and Montana fair housing law independently bar an increase aimed at a tenant because of a protected characteristic.

Because Montana fixes no single mandatory method to serve a rent-increase notice, the practical standard is provable written delivery within the notice period – and the 70-24-441 notice must be in writing, so a verbal increase does not count. Mont. Code Ann. 70-24-108 explains when a person has notice: by actual knowledge, by hand delivery, by delivery at the landlord’s place of business, by email to an address the party gave in the rental agreement (complete on a read receipt or non-automated reply), or by mail with a certificate of mailing or certified mail – and a mailed notice is treated as served three days after mailing. Whatever the method, the notice should state the current rent, the new rent, and the effective date, and the landlord should keep a signed, dated copy with proof of delivery. Our how to raise rent guide walks through the timing, and screening applicants with verified reports keeps tenancies stable so the increases you serve actually stick.

One point of honesty is worth flagging: there is no 90-day rent-increase rule anywhere in Montana, despite occasional claims to the contrary. The notice figures that matter are the 30-day month-to-month and 7-day week-to-week periods in Mont. Code Ann. 70-24-441 (with a shorter 15-day change-of-terms option in Mont. Code Ann. 70-26-109 that a 30-day notice already covers), and the only six-month figure is the retaliation presumption window in 70-24-431 – which is a look-back period for motive, not a notice period. Put together, a clean Montana increase is simple but exact: confirm the tenancy is periodic or at renewal, treat the increase as a change of terms, give at least 30 days’ written notice (or 7 days week-to-week, or a longer period the lease sets), keep the timing and motive outside the 70-24-431 retaliation bar, deliver the notice in writing with proof, and never let the increase track a tenant’s protected complaint. None of this replaces the screening you do at move-in – a tenant chosen for steady income and a clean payment history is the one most likely to absorb a lawful increase without a dispute.

Is Montana’s Rent-Increase Notice 15 Days or 30 Days?

Search results conflict on this point, and it is worth clearing up because getting the number wrong can void an increase. Two Montana statutes speak to changing the rent on a month-to-month tenancy, and they carry different figures:

  • Mont. Code Ann. 70-24-441 — the notice provision of the Residential Landlord and Tenant Act of 1977 — lets either party end a month-to-month tenancy on at least 30 days’ written notice (7 days for a week-to-week tenancy). Because a rent increase re-sets the terms of a periodic tenancy, Montana Legal Services and most guidance apply this 30-day notice to residential rent increases.
  • Mont. Code Ann. 70-26-109 — the older, general “change of lease terms by notice” statute (Title 70, chapter 26, drawn from the same source as California’s Civil Code 827) — provides that on a month-to-month lease the landlord “may, upon giving notice in writing at least 15 days before the expiration of the month, change the terms of the lease to take effect at the expiration of the month,” and that the notice, once served, becomes part of the lease if the tenant stays on. This is the 15-day figure some form vendors cite.

Both statutes are current Montana law, and they overlap. The safe, defensible course for a residential landlord is simple: give at least 30 days’ written notice. Thirty days satisfies the Residential Landlord and Tenant Act’s periodic-tenancy standard and comfortably clears the 15-day change-of-terms minimum, so the increase holds up under either reading. Do not rely on the