Missouri • Mechanics Lien Deadlines
Missouri Mechanics Lien Deadline Calculator
Learn the exact preliminary notice and lien filing deadlines in Missouri. Then jump into the LienDeadline calculator to see your real project dates in 0.3 seconds.
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Missouri Lien Deadline Overview
Preliminary Notice Deadline
Required at least 10 days before filing for subcontractors/suppliers
Mechanics Lien Filing Deadline
Must be filed within 6 months (180 days) after last furnishing
Typical Projects
Building material suppliers, lumber yards, concrete and rebar suppliers working on private construction projects in Missouri.
This page is a simplified summary for material suppliers and does not replace advice from a construction attorney.
How lien deadlines work in Missouri
In Missouri, material suppliers must follow specific deadlines to protect their lien rights. The preliminary notice deadline is required at least 10 days before filing for subcontractors/suppliers. The mechanics lien filing deadline is must be filed within 6 months (180 days) after last furnishing. Missing either deadline results in complete loss of lien rights for that project.
Preliminary notice rules
- Notice of Intent must be sent 10+ days BEFORE filing lien
- Equipment rentals require additional 15-day notice
- Required at least 10 days before filing for subcontractors/suppliers
Mechanics lien filing rules
- Notice of Intent must be sent 10+ days BEFORE filing lien
- Must be filed within 6 months (180 days) after last furnishing
- Mechanic's Lien must be filed within deadline
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Frequently asked questions
What is the mechanics lien deadline in Missouri?
Must be filed within 6 months (180 days) after last furnishing
Does Missouri require a preliminary notice?
Required at least 10 days before filing for subcontractors/suppliers
What happens if I miss the deadline?
You lose your legal right to file a lien for that project, even if you're still owed money. That's why many suppliers use automated deadline tools instead of spreadsheets.