Montana’s Residential Landlord and Tenant Act of 1977 (Mont. Code Ann. Title 70, Chapter 24) governs most tenancies, with security deposits handled in Chapter 25 and evictions in Chapter 27. The state is generally landlord-friendly — no deposit cap, no rent control, no deposit interest — but the deposit statute has a genuinely tenant-friendly twist: a clean move-out gets the full deposit back within 10 days.
Local governments are starting to add protections on top of the state baseline. Bozeman has codified a tenant right to counsel and funds Montana’s first rental-mediation program, and Missoula layers its own inspection and tenant-protection ordinances onto state law. The picture is changing fastest in the college towns, where rising housing costs have pushed tenant protections to the top of the local agenda.
This guide covers the state rules that drive most disputes — the deposit clock, notice periods, habitability, and eviction — and flags where local law goes further. It is general information, not legal advice.
| Governing law | Mont. Code Ann. Title 70, Chs. 24–27 |
|---|---|
| Security deposit cap | None set by statute |
| Deposit return deadline | 10 days if nothing is withheld; otherwise 30 days with itemized list |
| Wrongful withholding penalty | Forfeits withholding rights if no list; liable for the amount withheld |
| Nonpayment notice to quit | 3 days |
| Month-to-month termination notice | 30 days (MCA 70-24-441) |
Montana Rental Law at a Glance
Montana’s Residential Landlord and Tenant Act covers the essentials — duties, remedies, and termination — while Chapter 25 sets out a dedicated deposit scheme and Chapter 27 handles unlawful detainer actions. Montana places no limit on the amount of rent a landlord may charge and no cap on deposits, and there is no statewide rent control.
What Montana lacks in caps it makes up for in deadlines. The deposit statute runs on a two-track clock (10 days for a clean exit, 30 days otherwise), the month-to-month termination notice is a firm 30 days, and the nonpayment notice is typically 3 days. Landlords who treat these deadlines as suggestions forfeit real money; tenants who document their move-in and move-out condition are the ones who recover deposits.
Security Deposits: The Two-Track Clock
If the move-out inspection shows no damage, no cleaning needed, no unpaid rent, and no unpaid utilities, the landlord must return the full security deposit within 10 days (MCA 70-25-202). If anything is being withheld, the landlord has 30 days from the earlier of the termination of the tenancy or the surrender and acceptance of the premises to deliver a written list of any rent due and any damage and cleaning charges — together with payment of the difference.
There is no cap on the deposit amount, no interest requirement, and no separate-account rule. Miss the list deadline entirely and the landlord forfeits the right to withhold any portion of the deposit; wrongfully withholding any amount makes the landlord liable for that amount, with attorney’s fees available to whichever party prevails at the court’s discretion. There is no double- or treble-damages multiplier.
- ✓Deductible items are limited to a closed statutory list: tenant-caused damage, unpaid rent and utilities, lease penalties, and actual cleaning expenses (including a reasonable charge for the landlord’s own labor).
- ✓Cleaning charges for the landlord’s normal cyclical maintenance cannot be deducted unless the tenant’s negligence forced the work, and the tenant must get written notice and 24 hours to finish required cleaning first.
- ✓Practical tip for tenants: photograph everything, give a forwarding address, and attend the move-out inspection. For landlords: run the 10-day and 30-day deadlines in a calendar and keep invoices for every deduction.
Pet Deposits and Other Charges
Montana sets no cap on pet deposits or pet rent, and the deposit chapter does not carve pets out of the general rules — so any pet-related money held to cover damage should be handled with the same itemized, documented care as the base deposit, since the forfeiture rule applies to whatever is withheld.
Service and assistance animals are not pets under federal fair-housing law, so pet deposits and pet rent cannot be charged for them; a landlord may ask for documentation of the disability-related need. A Montana pet addendum should state the pet, any pet rent, and the tenant’s responsibility for damage, and should not rely on generic “no pets” clauses that conflict with reasonable-accommodation law.
Rent Increases and Notice Periods
Montana has no rent control and no limit on the size of a rent increase. For a fixed-term lease, the rent is locked for the term. For a month-to-month tenancy, either party may terminate by giving at least 30 days’ written notice (MCA 70-24-441), which is the practical notice floor for changing the rent as well — confirm the current statute text before relying on a specific rule for increases.
Tenants receiving an increase should get it in writing and compare it against comparable listings before responding. Landlords should put increases in writing, give a full rental period of notice, and keep proof of delivery — an oral increase on a month-to-month tenancy is a common source of disputes that the landlord rarely wins in court.
Habitability, Repairs, and Smoke Alarms
Montana landlords must maintain the premises in a fit and habitable condition and keep essential facilities in good and safe working order (MCA 70-24-303), and every rental unit must have at least one working smoke alarm at move-in — the landlord installs and verifies it, the tenant tests it and replaces batteries. The federal lead-based paint disclosure applies to housing built before 1978.
Tenant remedies for an unfixed serious condition include written notice followed by termination or a damages action under the Act’s remedy provisions; Montana courts have allowed repair-and-deduct in limited circumstances, but there is no broad statutory repair-and-deduct, so tenants who take that route should document the notice and costs carefully. Reporting a habitability problem in writing also protects against retaliation, which Montana law prohibits.
Evictions: Unlawful Detainer in Montana
Montana evictions start with a written notice. For nonpayment of rent, the common practice is a 3-day notice to pay or quit; lease violations generally get a notice to cure or quit, and holdovers face an unconditional notice. If the tenant does not comply, the landlord files an unlawful detainer action in justice court or district court, and the case can move quickly.
A tenant served with a summons should file a written answer by the deadline and appear at the hearing; missing the deadline can produce a default judgment. Only a court officer can execute a judgment of possession — self-help evictions, lockouts, and utility shut-offs are illegal. Tenants facing eviction should contact Montana Legal Services Association or a local tenant organization right away.
Local Rules and Resolving Disputes
Local governments are adding tenant protections. Bozeman has codified a tenant right to counsel for income-eligible tenants and funds Montana’s first rental-mediation program, and Missoula has its own rental-inspection and tenant-protection ordinances that can add requirements beyond state law — check the current city rules before drafting or signing a lease there.
Justice courts in Montana handle civil claims up to $15,000 (MCA 3-10-301), which covers nearly every deposit dispute. Start with a written demand letter citing the deposit chapter, then file where the property is located. Montana Legal Services Association (montanalawhelp.org) publishes plain-language guides and request-for-repairs letter templates, and mediation programs such as Bozeman’s can resolve disputes faster and cheaper than court.
Guide reviewed 2026-08-19. Rental laws change frequently; verify the current statute text before relying on any rule on this page. This information is not legal advice.