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Montana Mechanics LienLienra knows your state.
⚠ Montana has a 90-day deadline — serve the owner within 5 days of filing.
Check My Montana Deadline →Free · No account needed · 30 seconds
Where Montana contractors lose their lien rights
✕ Missing notarization
Montana requires a notarized sworn affidavit. An unnotarized lien is legally void — it cannot be enforced even if filed on time.
✕ Post-filing service: only 5 days
Montana requires certified mail to the property owner within 5 days of filing. Miss this and your lien may be unenforceable.
What Lienra handles automatically for Montana
Check your Montana case in 30 seconds
Describe what happened — Kayron will identify your deadline, notice requirements, and filing path for Montana automatically.
Montana Filing Requirements
Notice Requirements — Montana
Serve a copy on the owner within 5 days of filing
How to File in Montana with Lienra
Describe your case
Enter what happened — Kayron reads it and identifies your Montana lien path automatically.
Your CLAIM OF LIEN is generated
State-correct document for the County Clerk — includes the required notarization block.
File before the deadline
Deadline: 90 days after last furnishing. Lienra shows your exact deadline and what to do after filing.
Montana Mechanics Lien — Common Questions
What is the mechanics lien deadline in Montana?
In Montana, the mechanics lien deadline is 90 days after last furnishing. Missing this deadline means permanently losing your right to file a lien.
Where do I file a mechanics lien in Montana?
File your mechanics lien with the County Clerk.
Do I need notarization for a mechanics lien in Montana?
Yes. Montana requires notarization — the lien must be signed before a notary public. An unnotarized lien may be void.
Is a preliminary notice required in Montana?
Yes. Serve a copy on the owner within 5 days of filing
What is the document called in Montana?
In Montana, the document is called a CLAIM OF LIEN.
Ready to protect your Montana lien rights?
Kayron applies Montana's exact rules — County Clerk · 90 days after last furnishing
Check My Montana Deadline →Free to start · No credit card required
Please do a final review before filing.