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Montana Mechanics Lien Law

Everything you need to know to protect your lien rights in Montana

Critical Deadlines

20

days - Preliminary Notice

90

days - Lien Filing

720

days - Enforcement

📋Preliminary Notice

REQUIRED
Deadline
20 days from first furnishing
Form Name
Preliminary Notice
Must be Served To
Owner, General Contractor
Delivery Method
Certified mail or personal delivery

Warning: Missing this deadline may result in losing ALL lien rights.

⚖️Lien Filing

Filing Deadline
90 days from last work
Where to File
County Clerk and Recorder
Filing Fee
$15-30
Description
Within 90 days of last furnishing

⏱️Enforcement

Deadline to Sue
720 days from filing lien
Description
Within 2 years of filing lien

Note: If you don't file a lawsuit within this period, your lien becomes unenforceable.

🏛️Public Projects (Bond Claims)

Preliminary Notice
Required within 20 days
Bond Claim Deadline
90 days from completion
Governing Statute
MCA §18-2-201

Special Rules & Contractor Protections

Pay-if-Paid

⚠️ Enforceable

Anti-Indemnity

✓ Protected by MCA §28-2-2111

License Required

Not required for liens

💡 Important Notes for Montana

  • 20-day notice is required

📚 Statute References

Lien Law:
MCA §71-3-521
Bond Law:
MCA §18-2-201

Protect Your Rights in Montana

SubShield automatically applies Montana lien laws when analyzing your contracts. Get deadline tracking, compliance alerts, and personalized risk analysis.

This information is for educational purposes only and is current as of January 2026. Always consult with a licensed Montana construction attorney for your specific situation.