2026-09-25 · 9 min read

Montana Landlord-Tenant Law 2026: The Plain-English Guide

Montana runs its rentals under the Residential Landlord and Tenant Act of 1977 (Mont. Code Ann. §§ 70-24-101 et seq.), with security deposits living in a separate chapter (§§ 70-25-201 et seq.). That two-chapter split is the first thing to internalize. The headline facts: Montana is one of the few states with no cap on security deposits, returns run on a two-track clock (10 days when nothing is owed, 30 days when there are deductions), nonpayment evictions start with a 3-day notice, and tenants have a real repair-and-deduct right capped at one month's rent. Get the two deposit clocks and the mailed-notice rules right and Montana is a straightforward, landlord-friendly state to operate in.

Security deposits

• No cap on the amount — Montana does not limit what you can charge for a security deposit (§ 70-25-202). That freedom is rarer than landlords realize. Don't abuse it: an oversized deposit makes units harder to fill and turns every move-out into a high-stakes accounting fight.
• Two-track return clock: if there are no damages, no cleaning owed, no unpaid rent or utilities, and the tenant shows utilities are settled, you must return the full deposit within 10 days of termination or surrender-and-acceptance. If any deductions apply, you instead have 30 days to deliver a written, itemized list of rent due, damage charges, and cleaning charges plus the remaining balance (§ 70-25-202). Know on day one which track you're on.
• Allowed deductions: unpaid rent and utilities, damages beyond normal wear and tear, and cleaning — but on cleaning, Montana has a quirk worth knowing: the landlord is expected to give the tenant written notice of cleaning expectations, and the tenant gets 24 hours after that notice to finish the cleaning before you can charge it against the deposit. Build the cleaning checklist into the move-in packet, not the move-out fight.
• No separate account, no receipt, no interest required. Montana does not require a separate trust account, a deposit receipt, or interest payments. Run a separate ledger anyway — the 10-day clean-return clock is unforgiving and a commingled spreadsheet is how you miss it.
• Forwarding address: have the tenant give you a written forwarding address at the move-out walkthrough; otherwise mail to the last known address.
• Miss the deadline and you lose leverage: Montana has no automatic double-or-treble multiplier, but a tenant who sues gets what they're owed, and judges are not sympathetic to landlords who blew a clear statutory deadline — especially when you could have kept actual, provable damages by simply following the procedure.
• Practical habit: photo-document every unit at move-in and move-out. See our move-in/move-out inspection checklist.

Use our Security Deposit Deadline Finder and deductions guide.

Rent rules

• No rent control. Montana has no statewide rent control and no local rent ordinances of note. You set rent freely between lease terms.
• Rent-increase notice: the statute sets no dedicated notice period for increases. On a month-to-month tenancy, the 30-day termination notice (§ 70-24-441) is your practical vehicle — deliver increases in writing with 30 days' lead time. See how to raise rent legally.
• No mandatory grace period and no late-fee cap: Montana sets neither. Late is whatever your lease says it is, and late fees are lease-driven. Put the amount, the trigger, and any ceiling in the lease in plain numbers, and keep fees defensible — a judge can still throw out a fee that looks punitive. See how to handle late rent.
• No rent withholding for repairs: Montana tenants don't get a general right to withhold rent over repair disputes. They get something arguably better (for them): repair-and-deduct, covered below.

Eviction in Montana

Self-help evictions are illegal — no lockouts, no utility shutoffs, no seizing belongings (§ 70-24-429). You give the statutory notice, then file in justice or district court if the tenant doesn't comply. Montana's notice ladder is short and specific:

• Nonpayment: written notice that the agreement will terminate if rent isn't paid within 3 days (§ 70-24-422(2)). State the exact amount owed.
• Lease violations (curable): written notice specifying the breach, with 14 days to cure (§ 70-24-422(1)).
• Repeat violations: a second substantially similar breach within 6 months of a noticed-and-cured breach gets a 5-day notice with no right to cure.
• Unconditional 3-day quit: for destroying, defacing, damaging, impairing, or removing any part of the premises (§ 70-24-422(3)), and for unauthorized occupants or pets.
• Mailed notices add 3 days: serve by mail and the tenant's clock gets three extra days (§ 70-24-108). Email counts as notice only if the lease provides an email address for notices and you get a read receipt or a non-automated reply. Serve in hand whenever possible.
• Court moves fast: cases involving illegal activity are heard within 5 days of the answer deadline; all other eviction cases within 14 days.

Draft notices with exact dollar amounts and specific breaches, and keep rent ledgers current. See our lease agreement guide.

Full process: how to evict a tenant.

Lease termination and notice periods

• Month-to-month: 30 days' written notice by either party (§ 70-24-441). If the lease is silent on what happens at expiration and neither party gives 30 days' notice, the tenancy rolls into month-to-month on the same terms (§ 70-24-205) — so a sloppy lease can auto-extend on you.
• Week-to-week: 7 days' written notice (§ 70-24-441).
• Fixed-term: ends by its own terms; no renewal notice required unless the lease demands it.
• Abandonment: if a tenant breaches or walks out early, you can seek possession, unpaid rent, and actual damages — but you must mitigate by making reasonable efforts to re-rent (§ 70-24-427).

Repairs and habitability

• Montana imposes a real habitability duty (§ 70-24-303): comply with applicable building and housing codes, keep common areas clean and safe, maintain electrical, plumbing, sanitary, heating, ventilating, and air-conditioning systems in good working order, and supply running water and reasonable heat.
• Tenants must give you written notice of defects needing repair. Give every tenant a written maintenance channel at move-in and date-stamp every report. See how to handle maintenance requests.
• Repair-and-deduct is real and capped: if you fail to make needed repairs within a reasonable time after written notice, the tenant can have the work done and deduct up to one month's rent from the next rent payment (§ 70-24-406). A tenant announcing a deduction is a signal to fix the problem immediately, not to argue.
• Casualty damage: if fire, flood, or similar casualty substantially impairs the unit, the tenant may terminate by giving you written notice within 14 days of moving out (§ 70-24-409) — and gets the deposit back minus lawful deductions.
• Retaliation is prohibited (§ 70-24-431): no rent hikes, service cuts, or evictions in response to a tenant exercising rights under the Act.

Discrimination and Montana-specific notes

The federal Fair Housing Act applies, and Montana's own law (Mont. Code Ann. § 49-2-305) goes further: it bans housing discrimination based on sex, marital status, sexual orientation, race, creed, religion, color, age, familial status, disability, and national origin. The additions that trip up small landlords are marital status and age — screening language like "perfect for young professionals" or refusing unmarried couples is actionable in Montana. Apply identical written criteria to every applicant and document decisions. Our fair housing guide covers what you can and can't ask.

One Montana-only disclosure: if you know a unit was used as a clandestine methamphetamine or fentanyl lab, or has contamination from meth or fentanyl use, you must disclose it in writing to subsequent occupants until a certified contractor remediates it to state standards (§ 75-10-1305). Ask about it when you buy, and disclose if you know.

Small-landlord practical tips

1. Run two calendars for deposits. The 10-day clean-return clock starts the day the tenant is out; the 30-day itemized clock runs when deductions exist. Decide which track you're on within 48 hours of vacancy.

2. Don't over-collect just because you can. No cap doesn't mean no consequences — a two-month deposit doubles your refund exposure and your dispute surface.

3. Serve the 3-day nonpayment notice in person. Mailed notices hand the tenant three free days; email needs a read receipt to count. Hand delivery with a witness is fastest and cleanest.

4. Put cleaning expectations in writing at move-in. The 24-hour cleaning rule means move-out cleaning disputes are won or lost on paperwork you did months earlier.

5. Track interest-free deposits in a separate ledger anyway. Montana doesn't require a separate account, but commingling is how the 10-day deadline ambushes you.

The bottom line

Montana is straightforwardly landlord-friendly: no deposit cap, 3-day nonpayment notices, no rent control, and court hearings measured in days, not months. The traps are procedural, not substantive — the two-track deposit clock (10 days clean, 30 itemized), the 3 extra days for mailed notices, and the tenant's repair-and-deduct right capped at one month's rent. Run tight paperwork — written notices, photo documentation, separate deposit ledgers — and Montana's short timelines work in your favor. Loose paperwork turns the state's fastest clocks against you.

This is general information, not legal advice. Consult a Montana landlord-tenant attorney for specific situations.