Late Rent Fee Limits in Montana
At a glance
| Governing law | Mont. Code Ann. §§ 70-24-103(14), (16), 70-24-201, and 70-24-404 — an agreed late fee is part of rent; lawful rental-agreement terms control, subject to unconscionability |
|---|---|
| Maximum late fee | No numeric statutory cap; the rental agreement sets the amount, but a court may refuse an unconscionable provision (§ 70-24-404) |
| Grace period | None stated for a fee; any grace period comes from the agreement. Section 70-24-422(2)'s 3-day period after written notice governs termination for unpaid rent, not late-fee timing |
| Lease or notice requirement | The late fee must be agreed in the rental agreement; no separate writing is required because a rental agreement may be written or oral (§ 70-24-103(14), (16)) |
| One-time or recurring | No statutory one-time, daily, monthly, or compounding rule; the agreement controls, subject to unconscionability |
| Calculated on | No statutory formula; the agreement supplies any flat amount, rent percentage, or unpaid-balance base |
| Related fees & carve-outs | A landlord may not add a fee based on payment type except to recoup an electronic bank fee for electronic payment (§ 70-24-201(4)). Section 70-6-606(2)'s $20-or-20% safe harbor is self-storage only |
| If the fee is unlawful | No late-fee-specific refund or multiplier. A court may refuse an unconscionable fee provision (§ 70-24-404); the prevailing party may be awarded reasonable attorney fees and costs (§ 70-24-442) |
What actually governs a late fee in Montana
Montana's Residential Landlord and Tenant Act, Mont. Code Ann. §§ 70-24-101 through 70-24-442, contains no numeric cap on a residential late fee, no fee-free grace period, and no statutory rule fixing the fee's base or how often it may accrue. Section 70-24-103 instead defines "rent" to include late fees and other charges "as agreed on in the rental agreement," while § 70-24-201 allows lawful rent and payment terms in that agreement.
The agreement therefore supplies the amount, when the fee attaches, whether it repeats, and whether it is flat or calculated from rent or an unpaid balance. Montana defines a rental agreement to include written or oral agreements, so the Act does not impose a separate signed-writing condition for the fee.
There is no dollar or percentage ceiling, but § 70-24-404 supplies a statutory backstop: if a court finds a rental-agreement provision unconscionable, it may refuse to enforce the agreement or enforce the remainder without that provision. In an action on the rental agreement or arising under the Act, § 70-24-442 allows—but does not require—an award of reasonable attorney fees and costs to the prevailing party.
What trips people up
The three-day nonpayment notice is not a late-fee grace period. Section 70-24-422(2) permits termination if rent remains unpaid for three days after written notice of nonpayment and intent to terminate. It does not require a landlord to wait three days before assessing an agreed late fee.
A security-deposit deduction rule does not create a fee cap. Section 70-25-201 permits deductions for unpaid rent, late charges, and penalties due under lease provisions. That rule identifies possible deductions after a tenancy; it supplies no maximum, grace period, or accrual formula for the underlying late fee.
The $20-or-20% figure is for self-storage, not a home. Section 70-6-606(2) treats $20 or 20% of monthly rent, whichever is greater, as a reasonable self-storage late fee. It does not apply to an apartment, house, or other ordinary residential dwelling.
Payment-method fees have a separate restriction. Under § 70-24-201(4), a landlord may not add a fee merely because of the rent payment type, except to recoup an electronic bank fee incurred for electronic payment. That rule does not cap a fee charged because rent itself is late.
Common questions
What is the maximum residential late fee? Montana states no numeric maximum. The agreement supplies the amount, subject to a court's power to refuse an unconscionable provision.
Must the late fee be in a written lease? The fee must be agreed in the rental agreement, but § 70-24-103 defines rental agreements to include written or oral agreements. The Act states no separate written late-fee disclosure requirement.
Can a late fee be charged every day? The Act does not prescribe a one-time or recurring structure. Any daily or repeated charge must come from the agreement and remains subject to unconscionability review.
Can a tenant recover attorney fees in a dispute? Possibly, but not automatically. Section 70-24-442 says the prevailing party in an action on the rental agreement or arising under the Act may be awarded reasonable attorney fees, costs, and necessary disbursements.
Statutes and sources
- Mont. Code Ann. § 70-24-103(14), (16) — agreed late fees count as rent,
and a rental agreement may be written or oral.
"Rent" means all payments to be made to the landlord, including rent, late fees, or other charges as agreed on in the rental agreement ... "Rental agreement" means all agreements, written or oral ... embodying the terms and conditions concerning the use and occupancy of a dwelling unit and premises.
Official source: https://mca.legmt.gov/bills/mca/title_0700/chapter_0240/part_0010/section_0030/0700-0240-0010-0030.html (accessed 2026-07-20) - Mont. Code Ann. § 70-24-201(1), (3)-(4) — agreement terms, rent timing, and the payment-type-fee restriction.
A landlord and a tenant may include in a rental agreement terms and conditions not prohibited by this chapter or other rule or law, including rent ... Rent is payable without demand or notice at the time and place agreed upon by the parties ... A landlord may not charge an additional fee based on rent payment type except to recoup an electronic bank fee incurred for electronic payment.
Official source: https://mca.legmt.gov/bills/mca/title_0700/chapter_0240/part_0020/section_0010/0700-0240-0020-0010.html (accessed 2026-07-20) - Mont. Code Ann. § 70-24-404(1)(a), (3) — treatment of an unconscionable rental-agreement provision.
if the court, as a matter of law, finds that ... a rental agreement or any provision of the rental agreement is unconscionable, the court may refuse to enforce the agreement or enforce the remainder of the agreement without the unconscionable provision to avoid an unconscionable result
Official source: https://mca.legmt.gov/bills/mca/title_0700/chapter_0240/part_0040/section_0040/0700-0240-0040-0040.html (accessed 2026-07-20) - Mont. Code Ann. § 70-24-422(2) — the separate nonpayment-termination clock.
If rent is unpaid when due and the tenant fails to pay rent within 3 days after written notice by the landlord of nonpayment and the landlord's intention to terminate the rental agreement ... the landlord may terminate the rental agreement.
Official source: https://mca.legmt.gov/bills/mca/title_0700/chapter_0240/part_0040/section_0220/0700-0240-0040-0220.html (accessed 2026-07-20) - Mont. Code Ann. § 70-24-442 — discretionary prevailing-party fees and costs.
In an action on a rental agreement or arising under this chapter, reasonable attorney fees, together with costs and necessary disbursements, may be awarded to the prevailing party notwithstanding an agreement to the contrary.
Official source: https://mca.legmt.gov/bills/mca/title_0700/chapter_0240/part_0040/section_0420/0700-0240-0040-0420.html (accessed 2026-07-20) - Mont. Code Ann. § 70-25-201(1), (4) — separate security-deposit deduction rule.
A landlord ... may deduct from the security deposit ... unpaid rent, late charges, utilities, penalties due under lease provisions, and other money owing to the landlord at the time of deduction ...
Official source: https://mca.legmt.gov/bills/mca/title_0700/chapter_0250/part_0020/section_0010/0700-0250-0020-0010.html (accessed 2026-07-20) - Mont. Code Ann. § 70-6-606(2) — separate self-storage safe harbor.
A late fee of $20 or 20% of the monthly rent, whichever is greater, is a reasonable fee and may not be considered a penalty.
Official source: https://mca.legmt.gov/bills/mca/title_0700/chapter_0060/part_0060/section_0060/0700-0060-0060-0060.html (accessed 2026-07-20)
Source links
Every statute quoted above, linked, with the date we checked it.
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