Montana Lease Agreement: 5 Required Disclosures and What Your Lease Must Include
Montana requires 5 specific disclosures in every lease. Miss one and you could lose a dispute. Here's exactly what your Montana rental agreement must include — plus smart clauses that protect you.
Montana Doesn't Require a Written Lease — But You Need One Anyway
Here's something that surprises people: oral leases are legally enforceable in Montana. A handshake agreement to rent your cabin for $1,200/month is technically valid.
But operating without a written lease is like driving without insurance. Everything's fine until it isn't — and then you have zero documentation to prove what was agreed.
A written lease protects both parties. More importantly, it's where Montana's mandatory disclosures live. Skip these, and you're already non-compliant before the tenant moves in.
The 5 Mandatory Disclosures
Montana law requires these five disclosures in every residential lease. They're not optional suggestions — they're legal requirements.
1. Lead-Based Paint Disclosure (Pre-1978 Properties)
If your rental was built before 1978, federal law (not just Montana) requires you to:
- Disclose any known lead-based paint or hazards
- Provide the EPA pamphlet "Protect Your Family from Lead in Your Home"
- Give the tenant 10 days to conduct their own lead inspection (if they want)
- Include specific lead disclosure language in the lease
This applies regardless of whether you know there's lead paint. You must disclose what you know and acknowledge what you don't.
Penalty for non-compliance: up to $19,507 per violation under federal HUD/EPA enforcement.
2. Mold Disclosure
Montana requires landlords to disclose any known mold conditions in the rental unit. This means:
- A written statement about whether you're aware of existing mold
- The tenant acknowledges they've received this disclosure
You're not required to conduct mold testing — but you must be honest about what you know. If you've had mold problems in the past that were remediated, disclose the history.
3. Move-In Inspection Checklist
This one protects you as much as the tenant. Montana requires:
- A written inspection checklist documenting the unit's condition at move-in
- Both landlord and tenant sign the checklist
- Both parties receive a copy
This is your evidence when security deposit disputes arise. Without it, your deductions become "he said, she said" — and judges tend to side with tenants in those cases.
Pro tip: Take timestamped photos of every room, every appliance, every surface — and attach them to the checklist. Email a copy to both yourself and the tenant so the date is provable.
4. Methamphetamine Contamination Disclosure
If the property was used as a clandestine methamphetamine or fentanyl lab, Montana law (MCA § 75-10-1305) requires disclosure to tenants unless the property has been professionally remediated and the Montana DEQ confirms it meets decontamination standards (0.1 micrograms per 100 sq cm).
If remediation is confirmed, you're off the hook — and actually gain legal immunity from mold/contamination claims. But if the property hasn't been tested or remediated, you must disclose before signing a lease.
Check the Montana DEQ Meth Cleanup Program if you're unsure of a property's history, especially for properties you've recently purchased.
5. Landlord Name and Address
Every Montana lease must include:
- The name of the property owner or authorized managing agent
- An address where legal notices can be served
- A clear process for how tenants reach you
If your ownership or management changes during the tenancy, you must notify tenants in writing of the new contact information.
What Else Your Lease Should Include
Beyond the five mandatory disclosures, a solid Montana lease covers:
Core Terms
- Full legal names of all adult tenants (all should sign)
- Complete property address and unit description
- Lease start and end dates (or month-to-month designation)
- Monthly rent amount and due date
- Acceptable payment methods
- Security deposit amount and terms
Smart Protective Clauses
Late fees and grace period. Montana doesn't cap late fees, but they must be reasonable. Industry standard is 5% of monthly rent or a flat $50, with a 3–5 day grace period.
Returned check fee. Montana caps this at $30 per occurrence — don't charge more.
Maintenance responsibilities. Spell out who handles what. Example: "Tenant is responsible for changing HVAC filters monthly and maintaining yard below 6 inches."
Entry notice. Montana requires 24 hours' notice before landlord entry (except emergencies). Include this in your lease.
Pet policy. If you allow pets, specify: species, breed restrictions, weight limits, number allowed, pet deposit amount, and pet rent (if any).
Smoking policy. Designate the property as smoking/non-smoking and include consequences for violations.
Subletting clause. State whether subletting is allowed and what approval process applies.
Utilities. Clarify exactly which utilities are included in rent and which are the tenant's responsibility.
Clauses You Cannot Include
Montana law invalidates certain lease provisions — even if both parties sign them:
- Waiving habitability rights. You cannot make tenants waive their right to a safe, livable unit.
- Waiving the right to sue. Provisions requiring tenants to surrender legal remedies are void.
- Excessive penalties. Unreasonable fees can be challenged in court.
- Waiving security deposit return rights. Tenants cannot waive the 10/30-day return requirement.
If a clause violates the Montana Residential Landlord and Tenant Act, it's unenforceable — regardless of what the tenant signed.
Delivering the Lease
Montana requires that tenants receive a signed copy of the complete lease agreement. Don't just have them sign your copy and file it away — they get their own.
Best practice: Use digital signatures (DocuSign, HelloSign, or Rezides which has built-in e-signatures with customizable lease templates) so both parties automatically receive a timestamped copy. This eliminates any future dispute about what was signed.
Related Reading
- Montana Security Deposit Law: Complete 2026 Guide — The deposit rules your lease should reference
- How to Evict a Tenant in Montana — What happens when lease terms are violated