How much can a landlord charge for a security deposit in Montana?

No statutory limit found in the chapter (Mont. Code Ann. 70-25-201 to 70-25-206).

How long does a landlord have to return a security deposit in Montana?

Within 30 days after the tenancy ends (10 days if there is nothing to deduct) (Mont. Code Ann. 70-25-201 to 70-25-206).

Montana security deposit law

The state rules a landlord in Montana has to follow for a residential security deposit, from Mont. Code Ann. 70-25-201 to 70-25-206.

Maximum deposit: No statutory limit found in the chapter.
Deadline to return it: Within 30 days after the tenancy ends (10 days if there is nothing to deduct).
Itemized deductions: Written list of rent due, damage and cleaning charges, sent with the balance.
Interest on the deposit: Not required by state law
Penalty for wrongful withholding: Landlord owes the amount wrongly withheld; court may award attorney fees to the winner; landlord loses deduction rights if no list is sent.

Before you keep any part of a deposit

Compare the unit with the move-in inspection and photos. Normal wear and tear is generally not chargeable.
Keep receipts or written estimates for every deduction.
Send the return or the itemized list within the deadline above, to the tenant's forwarding address, and keep proof of mailing.

Working out the last month's rent? The prorated rent calculator does the partial-month math.

Source

Verification status: verified summary. Research date: November 5, 2026. Statute: Mont. Code Ann. 70-25-201 to 70-25-206. Source: mca.legmt.gov.

General information, not legal advice. Cities and counties can add stricter rules, and laws change. Check the current statute or a local attorney before you act.

Other states: Missouri · North Dakota · all states

Last updated November 5, 2026.