Grace period, late fee cap, and pay-or-quit notice rules
In Montana, rent is late the moment it is unpaid when due. There is no statutory grace period. But being late does not by itself end the tenancy. Before a landlord can file for eviction over nonpayment, the Montana Residential Landlord and Tenant Act of 1977 requires a written 3-day notice to pay rent or quit under MCA 70-24-422. Get the content or the service method wrong and a judge can dismiss the case, sending you back to day one. This page covers what the notice must say, how to serve it, how the mailing rule changes your timeline, and when a shorter repeat-violation notice applies.
Under MCA 70-24-422, if rent is unpaid when due and the tenant fails to pay within 3 days after written notice, the landlord may terminate the rental agreement and the tenant must vacate. The clock only starts once the tenant has received proper written notice of the nonpayment and of your intention to terminate if the rent is not paid in that window.
Montana counts this as a hard prerequisite: a landlord cannot bring an eviction for nonpayment without first serving a compliant 3-day notice. There is no obligation to offer a grace period beyond this statutory notice, and none is implied by state law.
To satisfy 70-24-422, the notice must state the amount of unpaid rent owed and make clear that the landlord intends to terminate the rental agreement if the tenant does not pay in full within the 3-day period. Practical drafting points:
If the tenant pays the full unpaid rent within the 3 days, the tenancy is reinstated and you cannot proceed. After the period expires, you may refuse a late payment and move forward with eviction.
Montana's service rules for notices are set by MCA 70-24-108. Valid methods include:
A process server or sheriff is not required to deliver the notice itself. Even so, keeping proof of delivery matters if the tenant later disputes receipt.
Service method changes when the clock starts. Under MCA 70-24-108, when you serve by certificate of mailing or certified mail, service is deemed made 3 days after the date of mailing. The tenant's 3-day cure period runs from that deemed-service date, not from the postmark.
In effect, a mailed 3-day notice gives the tenant roughly 6 days before you can act. If you need the shortest reliable timeline, hand-deliver the notice so the 3 days begin on the day of delivery, and document who delivered it and when.
For a recurring problem, 70-24-422 offers a faster route. If substantially the same noncompliance that you previously noticed recurs within 6 months, you may terminate on at least 5 days' written notice without giving another chance to cure that repeated breach. Document the first notice carefully so you can rely on this provision later.
One federal overlay matters: for federally backed or federally subsidized housing, the CARES Act still requires 30 days' notice to vacate for nonpayment, which preempts Montana's 3-day notice at those properties. Confirm your property's financing before relying on the 3-day rule.
Once rent is late and no grace period applies, the landlord must serve a formal 3-day pay-or-quit notice (Mont. Code § 70-24-422) before filing for eviction. This notice must state the total amount owed and give the tenant the option to either pay in full or vacate. If the tenant does neither, the landlord may file an unlawful detainer action in Montana court.
This overview reflects the Montana Residential Landlord and Tenant Act of 1977, principally MCA 70-24-422 (nonpayment and termination) and MCA 70-24-108 (service of notice), as in effect for 2026. It is general information for landlords, not legal advice. Statutes are amended and local courts apply them to specific facts; verify the current code text and consult a Montana attorney before serving a notice or filing for eviction.
Three days. Under MCA 70-24-422, the landlord must give written notice of nonpayment and intent to terminate, and the tenant has 3 days to pay in full before the landlord can terminate the tenancy and proceed to eviction.
No. Montana law provides no statutory grace period. Rent is late when it is unpaid on the due date, though the tenancy cannot be ended until you serve a compliant 3-day pay-or-quit notice under MCA 70-24-422.
Under MCA 70-24-108, you may hand-deliver it, mail it with a certificate of mailing or by certified mail, or email it to an address the tenant gave in the rental agreement (with email service complete only on a read receipt or non-automated reply). A process server is not required.
Yes. When served by certificate of mailing or certified mail, MCA 70-24-108 deems service made 3 days after the mailing date, so the tenant's 3-day cure period effectively begins 3 days later. Hand delivery avoids that add-on.
It must state the amount of unpaid rent and that the landlord intends to terminate the rental agreement if the rent is not paid within 3 days. Avoid bundling late fees or other charges into the rent figure, which can invalidate the notice.
If substantially the same violation recurs within 6 months of a prior noticed breach, MCA 70-24-422 lets you terminate on at least 5 days' written notice for that repeat. For federally backed or subsidized units, the CARES Act 30-day notice-to-vacate requirement may still apply.
Data sourced from Montana published statutes (Mont. Code § 70-24-422), U.S. Census Bureau American Community Survey 2023 5-Year Estimates. Last updated August 15, 2026. This page is for informational purposes only and does not constitute legal advice. Consult a licensed attorney for your specific situation.
