10 days if nothing is deducted, 30 with an itemized list.
The rule
In Montana, the clock starts when: tenancy ends or you surrender, whichever is first. The landlord then has 30 calendar days. The statute says:
“Each landlord, within 30 days subsequent to the termination of a tenancy or within 30 days subsequent to a surrender and acceptance of the leasehold premises, whichever occurs first, shall provide the departing tenant with a written list of any rent due and any damage and cleaning charges…”
With no damage, no cleaning, no unpaid rent, and proof that utilities are paid, the deposit is due within 10 days.
For example, if you returned the keys on Oct 25, 2026, the date would be Nov 24, 2026. Use the Clock for your own dates.
What the landlord has to send
A written list of rent due and damage and cleaning charges, delivered with any difference.
Do this
On move-out day
Give your forwarding address in writing and keep proof of sending. Photograph every room before you return the keys.
Deductions and wear and tear
Montana's statute limits what can be kept to the purposes it lists. We haven't summarised its wear-and-tear language yet; read the section linked above.
For a charge to replace something old, Fair Charge works out a prorated estimate from the item's age and useful life, and says where the useful life comes from. See also the item guides for carpet, paint and cleaning.
If the deadline passes
The amount wrongfully withheld; attorney fees at the court's discretion.
“A person who wrongfully withholds a residential property security deposit or any portion of the deposit is liable in damages to the tenant in a civil action for an amount equal to the sum determined to have been wrongfully withheld or deducted.”
The usual first step is a written demand that states the date the deposit was due and cites the statute. Our demand letter does that and carries any disputed deductions.
Your next steps
- Dated move-out plan for Montana: notice, the steps that start the clock, and the deadline.
- Letters: forwarding address · deposit demand · notice to vacate
- Small claims: we haven't verified Montana's limit or self-help page yet.
- Montana tenant-rights hub
Sources
- Mont. Code Ann. §70-25-202 · checked 2026-10-05
Information, not legal advice. Statutes are quoted from official legislature sites; summaries are ours. Spotted an error? Tell us.