What Is a Mechanics Lien in Montana — Complete 2026 Guide
✓ Verified against Montana statutes · Reviewed August 2026 · By Michael Evan — Founder · 50 states · 799 rules
Montana mechanics lien deadlines at a glance
Preliminary Notice
None — N/A
Mechanics Lien
90 days — From last date of furnishing
Enforcement
2 years — From filing
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Montana 90-Day Unified Filing Deadline — MCA § 71-3-535
Under MCA § 71-3-535, every person claiming a mechanics lien in Montana must file the lien within 90 days from the last date of furnishing labor, materials, or equipment. Montana uses a unified 90-day deadline for all claimant types — general contractors, subcontractors, sub-subcontractors, and material suppliers all operate under the same 90-day window from their individual last furnishing dates. There is no split deadline system (as in Indiana, where GCs have 60 days and subs have 90). The 90-day deadline is absolute — missing it permanently eliminates lien rights.
Where to File — County Clerk and Recorder in Montana's 56 Counties
Montana mechanics liens are filed with the County Clerk and Recorder in the county where the improved property is physically located. Montana has 56 counties, each with its own County Clerk and Recorder office. The lien must be filed in the county where the property sits. Major filing offices include Yellowstone County (Billings), Cascade County (Great Falls), Missoula County (Missoula), Gallatin County (Bozeman), and Flathead County (Kalispell). After filing, serve notice of the lien on the property owner.
No Preliminary Notice Required — Montana's Straightforward Process
Montana does not require any formal preliminary notice before filing a mechanics lien for any claimant tier under the Montana Construction Lien Act. General contractors, subcontractors, and material suppliers can all file a lien directly within the 90-day window without serving advance notice on the property owner. This makes Montana's lien process notably simpler than states with mandatory pre-lien notice requirements like California (20-day preliminary notice), Florida (Notice to Owner), or Washington. Contractors who work across Pacific Northwest and Rocky Mountain states must track which notice rules apply to which state's projects. The Mechanics Lien Management State System tracks Montana's 90-day deadline and 2-year enforcement deadline.
Enforcement — 2-Year Window Under MCA § 71-3-537
After recording a valid mechanics lien with the County Clerk and Recorder, Montana claimants have 2 years from the recording date to commence an action to enforce the lien under MCA § 71-3-537. The enforcement action is filed in the district court of the county where the property is located. Montana's 2-year enforcement window is more generous than most states, which allow only 1 year. However, it is still absolute — a lien that expires after 2 years without a filed enforcement action is permanently lost as a security interest against the property.
Frequently Asked Questions
How long do I have to file a mechanics lien in Montana?
All claimants have 90 days from the last date of furnishing labor or materials to file with the County Clerk and Recorder under MCA § 71-3-535. Montana's unified deadline applies to all tiers — general contractors, subcontractors, and material suppliers all have 90 days from their own last furnishing date.
Where do I file a mechanics lien in Montana?
File with the County Clerk and Recorder in the county where the improved property is located. Montana has 56 counties. Major offices include Yellowstone County (Billings), Gallatin County (Bozeman), and Missoula County (Missoula).
Is a preliminary notice required in Montana?
No preliminary notice is required for any claimant tier in Montana. All claimants file directly within the 90-day window. After filing, serve written notice on the property owner as a best practice.
How long do I have to enforce a Montana mechanics lien?
Under MCA § 71-3-537, you must commence an enforcement action within 2 years of the recording date. Montana's 2-year window is more generous than most states but still absolute.
Who can file a mechanics lien in Montana?
Under MCA § 71-3-521, any person furnishing labor, materials, or professional services for the construction, alteration, or repair of real property improvements has lien rights — including all tiers of the payment chain.