Montana Security Deposit Law: The Complete 2026 Guide for Landlords and Tenants

The Short Version

Here's what you need to know about security deposits in Montana, no fluff:

• There is no cap. Montana is one of the few states with no legal limit on how much a landlord can charge for a security deposit.
• Return deadline: 10 days if no deductions, 30 days if the landlord withholds anything.
• Deductions must be itemized in writing.
• No interest required. Landlords don't have to pay interest or hold deposits in a separate account.

Now let's dig into the details so you know exactly where you stand — whether you're the one collecting the deposit or the one handing it over.

How Much Can a Landlord Charge?

Montana has no statutory cap on security deposit amounts. That's unusual — most states limit deposits to one or two months' rent.

In practice, most Montana landlords charge between one and two months' rent. But legally? A landlord could ask for three months' rent if they wanted to. The market usually keeps things reasonable, because tenants will simply choose a different rental if the deposit is unreasonably high.

Bottom line: If you're a landlord, be competitive. If you're a tenant, a deposit of one month's rent is standard. Anything over two months is a red flag worth asking about.

The governing statute is MCA § 70-25-201, which defines security deposits but sets no maximum.

When Does the Landlord Have to Return It?

This is where Montana law gets specific, and where most disputes happen:

Situation	Return Deadline
No deductions (full refund)	10 days after move-out
Deductions taken	30 days after move-out

The clock starts on the later of these two events:

1. The tenancy officially ends (lease expiration or notice period completes)
2. The tenant actually surrenders the property and the landlord accepts it

This matters. If your lease ends June 30 but you don't hand over keys until July 3, the 10- or 30-day countdown starts July 3.

Source: MCA § 70-25-202

What Can a Landlord Deduct?

Montana law allows deductions for four things only:

1. Unpaid rent — including the last month if the tenant skipped out
2. Damage beyond normal wear and tear — holes in walls, broken fixtures, stained carpets from negligence
3. Cleaning costs — but only to return the unit to the condition it was in at move-in
4. Missing items — if the landlord provided furniture or appliances listed in the lease

What Counts as "Normal Wear and Tear"?

This is where landlords and tenants fight the most. Here's a practical guide:

Normal Wear and Tear (NOT deductible)	Actual Damage (Deductible)
Small nail holes from hanging pictures	Large holes or anchors in walls
Faded paint from sunlight	Crayon drawings, unauthorized paint colors
Worn carpet in high-traffic areas	Pet stains, burns, large tears
Minor scuffs on hardwood floors	Deep gouges or water damage
Loose door handles from normal use	Broken doors or missing hardware

When in doubt, the question is: "Did this happen because someone lived here, or because someone was careless?"

The Itemized Statement Requirement

If a landlord takes any deduction — even $20 for cleaning — they must provide a written, itemized list showing:

• Each specific deduction
• The dollar amount for each
• The remaining balance being returned

This isn't optional. A vague letter saying "deducted for damages" without specifics doesn't satisfy the law. The statement must be detailed enough that the tenant can understand exactly what they're being charged for and why.

The itemized list and any remaining deposit must be mailed or delivered to the tenant's last known address or forwarding address.

What If the Landlord Doesn't Return It?

If your landlord misses the 10- or 30-day deadline, or fails to provide an itemized statement, here's what to do:

Step 1: Send a Demand Letter

Write a clear, dated letter stating:

• Your move-out date
• The deposit amount you paid
• That the legal deadline has passed
• That you expect the full deposit returned within 7 days

Send it by certified mail so you have proof it was delivered.

Step 2: File in Small Claims Court

If the demand letter doesn't work, you can file a claim in your county's Justice Court (Montana's small claims court). The filing fee is typically $30–$50.

Montana courts can award the full deposit amount if the landlord failed to follow proper procedures, even if some deductions might have been legitimate.

For help with this process, Montana Lawhelp provides free guidance and form letters.

Tips for Landlords

1. Do a move-in inspection with photos and a written checklist, signed by both parties. This is your evidence if there's a dispute later.
2. Do a move-out inspection the same way. Invite the tenant to walk through with you.
3. Keep receipts for any cleaning or repair work you deduct for.
4. Mail the itemized list promptly — don't wait until day 29.
5. Document everything with dated photos. Phone timestamps are your friend.

Tips for Tenants

1. Take photos at move-in AND move-out. Timestamp them. Email them to yourself so the date is provable.
2. Request a walk-through at move-out so there are no surprises.
3. Leave a forwarding address in writing. If the landlord can't reach you, your deposit may sit in limbo.
4. Clean thoroughly before you leave — it's the easiest deduction for a landlord to justify.
5. Know the timeline. Mark day 10 and day 30 on your calendar after move-out.

Quick Reference: Montana Security Deposit Law

Question	Answer
Maximum deposit amount?	No limit
Return deadline (no deductions)?	10 days
Return deadline (with deductions)?	30 days
Must be held in separate account?	No
Interest required?	No
Written itemization required?	Yes, for any deduction
Can landlord deduct for normal wear?	No
Governing law?	MCA § 70-25-201 through 70-25-206

Related Reading

• How to Evict a Tenant in Montana: Step-by-Step — If a deposit dispute escalates, know the legal process
• Montana Property Tax Explained: 2026 Rates — Understand your annual tax obligations as a property owner

Where to Get Help

• Montana Lawhelp — Security Deposit FAQ — Free legal guidance for tenants
• Montana PIRG Tenant-Landlord Guide (PDF) — Comprehensive rights handbook
• MCA Title 70, Chapter 25 — The actual statute text
• Nolo — Montana Landlord-Tenant Laws — Plain-English legal reference