Lien Waiver

A lien waiver is a legal document where a contractor, subcontractor, or material supplier waives their right to file a mechanic's lien on a property. It's essentially a receipt that says: "I've been paid for this work, and I won't put a claim on the property for it."

There are four standard types of lien waivers, and understanding the differences matters. A conditional waiver upon progress payment waives your lien rights for a specific payment — but only once the check actually clears. An unconditional waiver upon progress payment waives your rights immediately, regardless of whether the check clears. The same conditional/unconditional distinction applies to final payment waivers, which cover the entire project balance.

The general rule: always use conditional waivers until the money is in your account. Signing an unconditional waiver before you've been paid means you've given up your lien rights even if the check bounces or the payment never arrives. Many states have statutory lien waiver forms that must be used — deviating from them can make the waiver unenforceable.

Lien waivers are part of the payment dance on virtually every commercial and many residential projects. General contractors won't get paid by the owner until they collect lien waivers from all their subs. Lenders won't release construction loan draws without them. They're the paper trail that proves everyone in the payment chain is being paid.

As a contractor, you'll both sign them (as a sub getting paid by a GC) and collect them (as a GC paying your subs). Getting comfortable with lien waivers — and never signing unconditional waivers prematurely — protects your cash flow and your legal rights.