What Montana law requires from your landlord
Montana's residential tenancy statutes are direct. Mont. Code Ann. § 70-25-201 gives every landlord in the state a single obligation: within 30 days of the tenant vacating the premises, return the security deposit in full or provide a written itemized statement of every deduction along with whatever balance remains. Both the statement and any remaining funds must arrive within that 30-day window. Sending the statement on day 31 is a violation. Sending the statement on time but withholding funds without justification is a violation.
The statute applies to all residential rental agreements statewide. There is no minimum deposit size, no landlord-type exception, and no carve-out for month-to-month tenancies. If you paid a deposit, § 70-25-201 governs its return.
What makes Montana's law particularly useful for tenants is § 70-25-206, the penalty provision. When a landlord wrongfully refuses to refund any portion of the deposit or fails to deliver the itemized statement within 30 days, the statute imposes liability for twice the wrongfully withheld amount plus reasonable attorney's fees and costs. That attorney's-fees provision is significant even in a demand-letter context: it tells your landlord that if this goes to court, they may owe your legal costs on top of the penalty. That's real leverage.
What your landlord can and cannot deduct
Montana law under § 70-25-101 establishes that a security deposit is held to secure performance of the rental agreement. That means the only legitimate deductions are tied to actual breaches of that agreement or damage attributable to the tenant beyond what normal use produces.
Lawful deductions in Montana generally include unpaid rent owed at the time of vacating, damage to the unit that goes beyond ordinary wear and tear, and cleaning costs required to restore the unit to the condition it was in at move-in. A landlord can also deduct for specific items the lease expressly authorizes, such as unreturned keys or remote controls, provided that authorization is in writing.
What landlords cannot deduct in Montana mirrors the rule in most states: ordinary wear and tear is not a recoverable loss. Paint scuffs on walls after a two-year tenancy, carpet compression from normal furniture placement, and minor scratches on wood floors from daily use are all expected results of someone living in a space. They are not tenant damage. Courts and landlords who conflate the two tend to lose on the itemized-deductions question, and when a landlord loses on that question after a demand letter, the bad-faith penalty becomes much more likely.
Also worth knowing: Montana has no statutory cap on how large a security deposit can be. A landlord can charge two months' rent, three months' rent, or more. The return and penalty rules apply regardless of the deposit amount.
The 30-day clock and what triggers it
The 30-day period starts running on the date the tenant vacates the premises. Montana's statute does not separately condition the clock on whether the tenant provides a forwarding address, but providing one in writing removes any ambiguity about where the landlord must send the funds or statement. Send your forwarding address via text, email, or certified letter when you hand over the keys. Date-stamp it. Keep a copy.
The landlord's itemized statement must be written. A landlord who calls you to explain the deductions verbally has not complied with the statute. A landlord who emails an itemization has likely complied if the email is sufficiently detailed, but courts generally look for a formal written document listing each deduction with a dollar amount and a brief explanation.
Day 30 is the hard cutoff. If you vacated on the 1st of the month, the landlord's statement or full refund must reach you by the 31st. Postmark is not the operative date; delivery is. If they mailed it on day 29 and it arrived on day 32, a Montana court is likely to treat that as a late delivery. This is why sending your demand letter promptly after the window closes matters: the closer to day 30, the fresher the violation.
What you can recover
Montana's recovery framework for a wrongful withholding has three components that stack.
First, the actual withheld amount. Whatever portion of your deposit the landlord kept without legal justification, you're owed that back.
Second, the statutory penalty of twice the wrongfully withheld amount. Note that this multiplier applies to the wrongfully withheld portion, not the full deposit. If your deposit was $1,500 and the landlord wrongfully kept $900 of it, the penalty is 2× $900, which is $1,800, for a total recovery of $2,700 on that portion.
Third, reasonable attorney's fees and costs. In a demand-letter context, you haven't hired an attorney yet, so this provision mostly functions as a credible threat. If the case proceeds to Montana's Justice Court small claims division (which handles cases up to $7,000), a prevailing tenant can recover court costs as part of the judgment.
Calculator
What you may be owed
Estimate only. Uses your state's return window and bad-faith multiplier. Not legal advice.
Evidence you need before you write anything
A demand letter is only as strong as the record behind it. Before you draft a single sentence, gather the following.
Proof of the deposit. Your lease showing the deposit amount, a bank statement or check image confirming the payment, and any receipt the landlord gave you at move-in.
Move-in documentation. A signed move-in inspection form is ideal. Photos with date stamps are the next best thing. If you took a video walkthrough when you moved in, locate it now. This documentation draws the line between pre-existing conditions and anything that happened during your tenancy.
Move-out documentation. Date-stamped photos or video of every room taken on or just before the day you handed over the keys. If you had a move-out walkthrough with the landlord present, any notes or communications from that walkthrough.
Written confirmation of the vacate date. Texts or emails to the landlord saying you were out, a notice-to-vacate letter you sent, or a dated key-delivery confirmation. The 30-day clock's start date needs to be provable.
The landlord's response, or lack of one. Any itemized statement received, any partial refund, any communication about the deposit. If you received nothing, document that absence: save screenshots of no incoming mail or no bank deposits from the landlord.
Once you have this assembled, the demand letter almost writes itself.
Writing the Montana demand letter
A Montana security deposit demand letter does one thing well: it puts the landlord on formal written notice that the 30-day statutory window has closed, identifies the specific dollar amount wrongfully withheld, cites § 70-25-206, and gives the landlord a firm deadline to cure the violation before you file in Justice Court.
Keep it to one page. These are the elements it must contain.
Header and date. Your name, your current mailing address, the date, and the landlord's name and mailing address.
Subject line. Something direct: "Demand for return of security deposit under Mont. Code Ann. § 70-25-201 and § 70-25-206."
The facts. The rental address, your move-in and move-out dates, the deposit amount you paid, and what (if anything) the landlord has returned. One short paragraph. No adjectives, no accusations.
The statutory violation. State plainly that the landlord has either failed to return the deposit within 30 days, failed to deliver a written itemized statement, or both. Cite § 70-25-201 by name. Don't paraphrase the statute; quote it or cite it exactly.
The demand. The specific dollar amount you're demanding and a reasonable deadline for payment, typically 10 to 14 calendar days from the date the letter is received. Be precise about how you calculated the amount.
The consequence. A clear statement that failure to comply will result in a Justice Court filing seeking the withheld amount, the 2× statutory penalty under § 70-25-206, court costs, and reasonable attorney's fees. Spell this out. Landlords who have seen the statute know what it means; landlords who haven't will look it up.
Signature. Your typed name and a signature if the letter is printed.
Send the letter via USPS Certified Mail. Keep the tracking number and the delivery confirmation. That confirmation becomes your proof of notice if the case goes to court.
The tone should be controlled and factual. Anger in a demand letter signals that you might settle for less. Precision signals that you know the statute and will use it.
If the landlord still refuses after the deadline
If the deadline in your demand letter passes without payment or a credible response, the next step is filing a Montana small claims case for a withheld security deposit in the Justice Court for the county where the rental was located.
Montana's Justice Court small claims division handles cases up to $7,000, which covers the vast majority of deposit disputes including the 2× penalty. Filing fees are low, the process is designed for self-represented plaintiffs, and the demand letter you already sent becomes your first piece of evidence.
What to expect after the letter goes out
Most landlords respond within the first week after receiving a certified demand letter that cites the specific penalty statute. The combination of a concrete dollar demand, a named statute, and a clear deadline is often enough on its own. For landlords who have withheld deposits out of inertia or a belief that tenants won't follow through, the certified mail tracking and statutory citation changes the calculation quickly.
There are a few common outcomes.
Full payment within the deadline. The most common result. Keep the confirmation and close the matter in writing so there's no ambiguity about what was paid and what it covered.
Partial payment with a revised itemization. The landlord concedes part of the claim but disputes some deductions. Evaluate the revised itemization against your move-in and move-out documentation. If the remaining disputed amount still has a factual basis, you can accept the partial payment and file in Justice Court for the balance plus any applicable penalty on the withheld portion.
No response. This is the clearest path to a Justice Court judgment. A landlord who ignores a certified demand letter citing § 70-25-206 has very little to stand on when you walk into the courtroom with tracking confirmation showing delivery.
A response disputing liability entirely. Your move-in and move-out documentation is what resolves this. If you have date-stamped photos showing the unit was clean and undamaged when you left, the landlord's position becomes very difficult to defend.
Whatever the response, the 30-day window and the certified letter are already part of the factual record. That record belongs to you.