Mechanic's Lien Deadline Calculator

A mechanic's lien is only as good as its timing. Every state gives claimants a fixed window, usually 60 days to 6 months, to record the lien after their last day of furnishing labor or materials. Inside the window, the lien attaches to the property and gets the owner's and lender's attention. Outside it, the claim is just an unpaid invoice.

The trap is the trigger. The clock almost never starts on the invoice date or the payment due date. It starts on the last day you actually furnished work, which for a sub who demobilized in March and did a punch-list visit in May is a genuinely contested question. Some states add wrinkles: Virginia counts from the end of the month worked, Ohio and Indiana run shorter windows on residential projects, and several states split the window by claimant tier.

This calculator covers the 25 states where the deadline runs cleanly from the last-furnishing date. For states where the window depends on other triggers (a recorded notice of completion, the claimant's contract tier), it points you to the state guide instead of guessing.

Subs and suppliers use this date as a filing deadline. GCs should use it as a risk horizon. Every sub who hasn't signed a waiver is a live lien risk until their state's window closes. A drywaller who finished in March and a painter who finished in May have different expiration dates on the same project, and the project isn't clean until the last one lapses.

The cheaper alternative to tracking expiration dates is closing each one early: a signed conditional waiver with every pay app, an unconditional waiver once the check clears. A sub with a signed unconditional waiver on file isn't a lien risk no matter how many days are left on their window. That's the loop lien waiver software exists to run.