✓ Law Verified June 2026
This guide explains montana rent increase laws in plain English — whether there is a cap on how much your landlord can raise your rent, how much notice they must give, which Montana cities have local rent control, and what to do if an increase looks illegal. All figures are from Montana law, verified as of June 2026.
In This Montana Guide:
Montana Rent Increase Rules at a Glance
| Statewide rent cap | NO — Montana has no statewide rent cap. There is no limit on how much a landlord can raise rent. Montana law does not regulate the dollar amount or percentage of any rent increase. Landlords may raise rent to any amount as long as proper written notice is given and the increase is not retaliatory or discriminatory. |
| Notice required before increase | Month-to-month tenancy: 30 days written notice before the increase takes effect (MCA 70-24-441). Week-to-week tenancy: 7 days written notice. Fixed-term lease (e.g. 6-month or 1-year): rent cannot be increased until the lease term expires, unless the lease itself contains a clause allowing mid-lease increases. |
| How often rent can be raised | Montana law does not set a specific frequency limit on rent increases. For month-to-month tenants, a landlord may raise rent as often as every 30 days, provided proper 30-day written notice is given each time. For fixed-term leases, rent cannot change until the lease expires (unless the lease allows it). There is no once-per-year rule in state law. |
| During a fixed-term lease | NO — a landlord generally cannot raise rent during a fixed-term lease in Montana. The lease locks in the rent amount for its entire term. The only exception is if the lease agreement itself contains a clause that specifically permits rent increases during the term. If your lease has no such clause, any mid-lease rent increase is unenforceable. |
Retaliatory increases: YES — Montana prohibits retaliatory rent increases under MCA 70-24-431. A landlord may not raise rent in retaliation after a tenant has: (a) complained to a government agency about health or safety code violations, (b) complained in writing to the landlord about violations of MCA 70-24-303 (landlord obligations), or (c) organized or joined a tenants’ union.
If the rent increase occurs within 6 months of any of these protected actions, courts presume the increase is retaliatory (rebuttable presumption). The tenant may use this as a defense in court and may be entitled to remedies under MCA 70-24-411.
Montana Cities With Local Rent Control
NONE — No city or county in Montana has a local rent control ordinance. Montana state law explicitly preempts (prohibits) local governments from enacting any form of rent control.
Exempt properties: Because Montana has no rent control at all, there is no exemption framework. All private residential properties — including new construction, single-family homes, duplexes, and apartments — are unregulated with respect to rent amounts.
The only distinction in the preemption law (SB 105, 2023) is that property in which a local government has a property interest or an interest through a housing authority may be subject to local government rent restrictions.
State preemption: YES — Montana preempts local rent control. In 2023, Governor Gianforte signed both HB 463 (signed March 2, 2023) and SB 105 (signed May 1, 2023), which together prohibit any city, county, or local government in Montana from enacting ordinances or laws that control or limit rent amounts for private residential or commercial property. This means no Montana municipality can pass rent control in the future.
What to Do If Your Rent Increase Is Illegal
If you believe a rent increase is retaliatory (within 6 months of a protected complaint or union activity), you may raise retaliation as a legal defense if the landlord tries to evict you, and you may be entitled to remedies under MCA 70-24-411. If you did not receive proper 30-day (or 7-day for week-to-week) written notice, the increase may be unenforceable for that period.
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If you believe the increase is based on discrimination (race, color, national origin, religion, sex, familial status, disability, or other protected class), you can file a complaint with the Montana Human Rights Bureau or HUD.
Many tenants start by contacting Montana Legal Services Association (MLSA) at montanalawhelp.org for free legal help, or the Montana Department of Justice Office of Consumer Protection. You may also consult a private attorney or contact MontPIRG’s renter resources program.
Other Montana rent rules: Montana’s Residential Landlord and Tenant Act (MCA Title 70, Chapter 24) governs most rental relationships but does not apply to certain arrangements such as transient hotel occupancy, residence at a public or private institution for care, or fraternity/sorority housing. Montana has no mandatory rent receipt law. Montana landlords must give written notice — verbal notice of a rent increase is not legally sufficient.
Montana’s 2023 preemption laws (HB 463 and SB 105) are among the broadest in the country, covering both residential and commercial property. Mobile home park tenants in Montana may have additional protections under the Montana Mobile Home Park Landlord-Tenant Act (MCA Title 70, Chapter 33).
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Official Montana Sources & Resources
- Montana Attorney General: https://www.dojmt.gov/office-of-consumer-protection/tenants-and-landlords/
- Montana Rent Statute: https://mca.legmt.gov/bills/mca/title_0700/chapter_0240/parts_index.html
- U.S. Department of Housing and Urban Development: hud.gov
- Cornell Legal Information Institute: law.cornell.edu/wex
Understanding Montana Rent Increase Laws
Whether a Montana rent increase is legal depends on the cap (if any), the notice given, and whether the increase is retaliatory. Montana rent increase laws protect tenants from surprise hikes by requiring a minimum notice period before any increase takes effect.
If you believe a Montana rent increase violates these rules, document the notice you received, check the math against the cap, and contact your local housing authority or legal-aid office.
Knowing the Montana rent increase rules before your lease renews puts you in a much stronger position.
This Montana rent increase guide was last verified against official sources in June 2026. Rent caps change — verify with your state or a local legal-aid office.
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Disclaimer: This guide is informational only and is not legal advice. Landlord-tenant laws change and vary by city and county within a state. Verify current rules with your state, your local court, or a free legal-aid office before acting. If you are facing eviction, contact a local tenant attorney or legal-aid organization right away.