MTMontana
Montana Lien Deadlines for Material Suppliers
Material suppliers in Montana have specific rights to file a mechanics lien if they aren't paid. However, Montana law requires strict adherence to notice and filing deadlines. If you miss a deadline by even one day, your lien rights may be extinguished forever. This guide outlines the critical steps for suppliers to secure their payment rights.
Public date calculations cover Florida and Kansas. Montana dates require qualified review.
Risk context
Montana is High Risk for Suppliers
Montana has strict deadlines. Always calculate your specific deadline based on your last furnishing date.
Deadline schedule
Montana Mechanics Lien Deadlines (Updated 2026)
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| Deadline Type | Timing | Details |
|---|---|---|
| Lien Filing Deadline | 90 days from last furnishing | Must be filed with the county recorder/clerk. |
| Enforcement Deadline | 2 years from filing | Lawsuit to foreclose on the lien must be filed by this date. |
| Preliminary Notice | Notice of Right to Claim Lien within 20 days of first furnishing | Required to preserve your right to file a lien later. |
| Statutes | Governing statutes | Mont. Code Ann. §71-3-531; §71-3-535; §71-3-562 |
Supplier pitfalls
Common Supplier Mistakes in Montana
Missing the 20-day Notice of Right to Claim Lien
Many suppliers fail to send the required preliminary notice early in the project, invalidating their future lien rights.
Filing the lien after 90 days
Waiting too long to file. The deadline is strict and often does not extend for weekends or holidays.
Missing the 2-year enforcement deadline
Filing a lien is not enough; you must enforce it (file a lawsuit) before the enforcement period expires.
Deadline calculator
Not Sure Which Deadline Applies?
Use this Montana guide and collect your project facts for qualified review.
Review Montana project factsThe public calculator provides dates only for reviewed Florida and Kansas scenarios; it does not calculate a Montana date.
Important note