Montana Security Deposit Law (2026): Deadlines, Interest & Penalties
If you rented in Montana, your landlord has 30 days after you move out to return your security deposit under Mont. Code § 70-25-201 to -206. The landlord is not required to pay interest on the deposit. Miss the deadline or wrongfully withhold funds, and the penalty can be damages; cleaning deduction rules strict. Use the calculator above to see exactly what you are owed and when it was due.
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Montana Deposit Rules at a Glance
| Return deadline | 30 days after move-out 10 days if no deductions; 30 days with deductions |
|---|---|
| Interest on deposit | Not required |
| Separate account required | No |
| Deposit limit | No limit |
| Penalty for violations | Damages; cleaning deduction rules strict |
Montana Security Deposit FAQ
How long does a landlord have to return a security deposit in Montana?
In Montana, a landlord must return the security deposit within 30 days after the tenancy ends, under Mont. Code § 70-25-201 to -206. Note: 10 days if no deductions; 30 days with deductions.
Does my landlord owe me interest on my security deposit in Montana?
No. Montana law does not require landlords to pay interest on residential security deposits.
What is the penalty if a landlord misses the deposit deadline in Montana?
Damages; cleaning deduction rules strict. The governing statute is Mont. Code § 70-25-201 to -206.
Is there a limit on how much a landlord can charge as a security deposit in Montana?
Yes. In Montana, the security deposit is limited to No limit.
Does a Montana landlord have to keep my deposit in a separate account?
No. Montana law does not require landlords to hold security deposits in a separate or escrow account.
Are there exceptions to the 30-day deposit deadline in Montana?
Yes — the deadline can vary: 10 days if no deductions; 30 days with deductions. When in doubt, check the statute itself (Mont. Code § 70-25-201 to -206) or ask a local tenant-rights organization.
What can I do if my landlord won't return my deposit in Montana?
First, send a written demand letter citing Mont. Code § 70-25-201 to -206 — our free generator creates one with your amounts filled in. If the landlord still doesn't pay, you can usually file in small claims court, where the penalty exposure is damages; cleaning deduction rules strict.