Montana's Residential Landlord and Tenant Act rewards landlords who keep tight paperwork and quietly punishes the ones who don't. Skip the itemized deduction list and you forfeit the deductions entirely; skip the move-in condition statement and the deposit becomes nearly untouchable. Here's the sixty-second version, then the detail.

The 60-second Montana compliance check

  • Security deposits have no cap, but refunds are due within 10 days when nothing is owed, 30 days when you deduct (MCA § 70-25-202).
  • No timely itemized list means you forfeit the right to withhold anything for damage or cleaning (MCA § 70-25-203).
  • Entry requires at least 24 hours' notice, except in emergencies (MCA § 70-24-312).
  • Nonpayment gets a 3-day pay-or-quit notice (MCA § 70-24-422).
  • Ordinary lease violations get 14 days with a right to cure; unauthorized pets or occupants get 3 days (MCA § 70-24-422).
  • Month-to-month tenancies end on 30 days' written notice from either side (MCA § 70-24-441).
  • Rent control is banned statewide (HB 463, 2023).
  • Since October 1, 2025, managers of four or more units must refund application fees to applicants who never sign (HB 311, 2025).

Deposits: two clocks and a forfeiture trap

Montana doesn't cap deposits. Charge what the market bears, unlike Arizona, which stops you at one and a half months' rent. The regulation is all on the return side (MCA § 70-25-202).

Two clocks run at move-out. If the unit needs no cleaning or repairs and no rent or utilities are owed, the full deposit is due back within 10 days. If you deduct for rent, damage, cleaning, or unpaid utilities, you owe a written itemized list of every charge within 30 days.

Miss that list and MCA § 70-25-203 strips your right to withhold anything for damage or cleaning; the argument is over before it starts. The deductible categories are the usual four: unpaid rent, repair of tenant-caused damage, cleaning, and utilities the tenant left unpaid. Cleaning has its own prerequisite: written notice of what needs cleaning and 24 hours for the tenant to handle it themselves before you can charge for it.

The trap out-of-state owners hit most is MCA § 70-25-206. Without a written statement of the unit's condition at move-in, you can't withhold for damage unless you prove by clear and convincing evidence that the tenant caused it during the tenancy. That's a heavy courtroom standard to carry over a scratched floor. Do the walkthrough, get both signatures, date the photos. Rentari runs both the 10-day and 30-day Montana clocks automatically once a move-out date is set.

Rent, late fees, and the 2023 rent control ban

Rent is due when the lease says. Montana adds no statutory grace period and no cap on late fees, which only need to live in the lease and read as compensation rather than punishment. Colorado caps late fees at the greater of $50 or 5 percent; Montana went the opposite direction and froze local regulation instead.

House Bill 463, signed in March 2023, bans Montana cities and counties from adopting rent control in any form. Bozeman and Missoula councils can debate it all they like; they can't cap your increases. On a month-to-month tenancy, a rent increase travels on the same 30 days' written notice as a termination. On a fixed term, rent is locked until renewal unless the lease says otherwise.

Entry: 24 hours' notice, and don't wear it out

Non-emergency entry takes at least 24 hours' notice, at reasonable times, and the statute separately warns landlords not to abuse the right of access to harass a tenant (MCA § 70-24-312). Emergencies excuse notice. The statute doesn't insist the notice be written, but write it anyway; the log is what settles the argument two years later. Neighboring Idaho has no entry statute at all, which startles owners managing on both sides of the Bitterroots.

The eviction ladder: 3, 5, 14, and 30 days

Every Montana eviction starts with the right notice under MCA § 70-24-422, and the day counts change with the offense:

  • Unpaid rent: 3-day written notice to pay or the agreement terminates.
  • Unauthorized pet or occupant: 3-day notice, curable by removing the pet or person.
  • Other lease violations: 14-day notice, defeated if the tenant cures within the 14 days.
  • Same violation again within 6 months: 5-day notice, no second cure.
  • Destructive conduct or creating a dangerous condition: 3-day notice.
  • Month-to-month, no cause: 30 days, or 7 for week-to-week (MCA § 70-24-441).

One quirk worth knowing: verbal abuse of the landlord is its own statutory ground, a 3-day notice with a right to remedy (MCA § 70-24-422(1)(f)). Few states put that in writing. When a notice expires unmet, you file in justice court; self-help stays illegal the whole way through, meaning no lock changes, no utility shutoffs, no hauling belongings to the driveway. Montana-specific notices with the correct day counts are in the forms library.

When the shoe is on the other foot

Tenants get a mirror-image toolkit under MCA § 70-24-406. For a material habitability failure, they can serve notice that the lease terminates in 30 days unless you fix the problem within 14, and in an emergency the repair window shrinks to 3 working days. They can also repair and deduct up to one month's rent when you sit on a problem, and if the same breach recurs within six months, they can end the lease on 14 days' notice with no second chance for you to fix it. Treat every dated repair letter as a countdown with money attached.

Disclosures Montana actually requires

Four items, all cheap to do and expensive to skip:

  • The name and address of the owner or the person authorized to manage the property and accept legal notices (MCA § 70-24-301).
  • A signed statement of the unit's condition at move-in whenever you collect a deposit (MCA § 70-25-206).
  • The mold disclosure under the Montana Mold Disclosure Act, covering known mold plus any testing and remediation records (MCA § 70-16-703).
  • The federal lead-based paint disclosure and EPA pamphlet for pre-1978 buildings.

Every number in this guide, in table form, lives on the Montana quick-reference page.

What changed, 2023 through 2025

  • HB 463 (2023): statewide preemption of local rent control, described above. The most consequential Montana rental law of the decade so far.
  • HB 732 (2023): a rewrite of the Mobile Home Lot Rental Act: sale protections for home owners, expanded retaliation rules, and a revised lot-eviction process. If you rent lots rather than dwellings, it is its own regime; read it separately.
  • HB 311 (signed May 2025, effective October 1, 2025): application-fee refunds. A property manager of four or more units must refund the application fee to any applicant who doesn't end up signing a lease, minus costs for services actually performed and itemized in writing when the fee was collected.

The 2025 session's larger housing package (taller buildings, easier ADUs) reshapes supply, not the landlord-tenant act. Nothing in it changes your notices, deposits, or entry rules.

Montana landlord FAQ

How fast can I evict for unpaid rent?

Serve the 3-day pay-or-quit notice as soon as rent is late (MCA § 70-24-422). If it expires unpaid, file in justice court. There's no statutory grace period; only your lease can create one.

What actually happens if my deposit paperwork is late?

Failing to deliver the itemized list on time forfeits your right to keep anything for damage or cleaning (MCA § 70-25-203), and the tenant can sue for the balance. The 10-day clock applies when you owe everything back; deductions buy you 30 days, not more.

Do I really have to refund application fees now?

If you manage four or more units, yes. Since October 1, 2025, HB 311 requires refunding the fee to applicants who never sign, less itemized costs for screening services you actually performed and disclosed up front.

Can Bozeman or Missoula cap my rent increases?

No. HB 463 (2023) bans local rent control statewide, so no Montana city or county can limit what you charge or how much you raise it.

Is a move-in checklist actually required?

If you take a deposit, effectively yes. MCA § 70-25-206 conditions damage withholding on a written statement of the unit's condition at the start of the tenancy. Without one, you carry a clear-and-convincing burden of proof to keep a single dollar for damage, a standard most deduction disputes can't survive.

This page is general legal information for Montana rental owners, not legal advice. Statutes change and courts interpret them, so before relying on any deadline or notice period here, confirm it against the current Montana Code Annotated or with a local attorney.