State deadline reference

Montana Lien Deadlines for Material Suppliers

Use this Montana guide to check preliminary notice, lien filing, and enforcement timing before a receivable becomes unprotected.

Try 3 free (no email) + 7 more after email

Up to 10 total • no credit card

Montana deadline risk

Missing a Montana notice or lien filing deadline can eliminate lien rights. Run the calculator early and verify close calls.

Deadline Type	Timing	Details
Preliminary notice	20 days after first furnishing for subs/suppliers	Notice rules can depend on role, project type, and contract chain. Send notices early when in doubt.
Mechanics lien filing	90 days after last work	Use this as a planning estimate and verify the filing trigger.
Enforcement	2 years after filing lien	Filing a lien is not the final step. Track enforcement deadlines separately.

Run the deadline check when materials are furnished, not when collections already become urgent.

Preliminary notice rules can change by role and project type. Treat the notice path as a required workflow check.

Use the calculator for operational tracking, then verify high-value or disputed claims with counsel.

Use the calculator with your invoice date to estimate the Montana deadline.

Select Montana in the calculator to get a date-specific result.

90 days after last work

20 days after first furnishing for subs/suppliers

No. This guide is a deadline reference for construction finance workflows. Verify critical filing decisions with licensed counsel.

This guide is for informational purposes only and does not constitute legal advice.