Construction money, explained
Lien waiver
A lien waiver is a signed document in which a contractor, subcontractor, or supplier gives up (waives) their right to file a mechanic's lien against a property, normally in exchange for receiving payment for the work or materials they provided.
Updated June 2026
What is a lien waiver?
A mechanic's lien is a powerful tool: anyone who furnishes labor or materials to improve a property can, if unpaid, claim a security interest against that property. A lien waiver is the release of that right. When you sign one, you are confirming you've been paid (or will be) and that you give up your lien claim for that amount of work.
Owners and general contractors collect lien waivers to protect themselves and the title to the property. Before releasing a payment — or before closing out a job — they want signed waivers from everyone in the payment chain, so no surprise lien surfaces later from a sub or supplier who claims they weren't paid.
What are the four types of lien waivers?
There are four standard types, formed by combining two distinctions. The first distinction is conditional versus unconditional. A conditional waiver only takes effect once payment actually clears — it is contingent on the money arriving. An unconditional waiver releases your lien rights the moment you sign it, regardless of whether you've actually been paid.
The second distinction is progress versus final. A progress waiver covers a single progress payment during the job; a final waiver covers the last payment and releases all remaining rights at completion.
Combine them and you get: conditional waiver on progress payment, unconditional waiver on progress payment, conditional waiver on final payment, and unconditional waiver on final payment. The conditional-on-progress-payment waiver is the workhorse used during active construction.
Conditional vs. unconditional: which should you sign?
As the party getting paid, you generally want to sign conditional waivers and avoid unconditional ones until the money is truly in hand. Sign an unconditional waiver and the check bounces, and you may have already given up your lien rights for that amount — a genuinely dangerous spot.
A safe pattern many contractors follow: exchange a conditional waiver to request or accompany a payment, then provide the unconditional waiver only after the payment has cleared. Some states (including California, Texas, Florida, and others) publish statutory waiver forms that must be used, so check your state's rules before drafting your own.
Lien waivers tie directly to your billing and payment records, which is where Simple Contractor CRM helps today: it tracks each draw, what's been recorded as paid, and the outstanding balance per job, so you know exactly which payments have cleared before you sign anything unconditional. Generating the waiver documents themselves is the kind of feature that would be planned, not something the app does today.
Worked example
You're a subcontractor owed $25,000 for a progress payment. The GC asks for a lien waiver before cutting the check. You provide a conditional waiver on progress payment for $25,000 — it says you release your lien rights for that amount only once the $25,000 actually clears.
The check arrives and clears. Now it's safe to sign the unconditional waiver on progress payment for the same $25,000. Had you signed the unconditional version first and the payment failed, you'd have surrendered your lien claim with nothing to show for it.
Frequently asked
- What are the four types of lien waivers?
- Conditional waiver on progress payment, unconditional waiver on progress payment, conditional waiver on final payment, and unconditional waiver on final payment.
- Should I sign a conditional or unconditional lien waiver?
- As the party being paid, prefer conditional waivers until payment clears. Only sign an unconditional waiver after the money is actually in your account.
- Does signing a lien waiver mean I've been paid?
- Not necessarily. A conditional waiver only takes effect once payment clears, but an unconditional waiver releases your rights on signature whether or not you've been paid — which is why timing matters.
- Are lien waiver forms standardized?
- Several states mandate specific statutory waiver forms (for example California, Texas, and Florida). Where no form is required, parties draft their own, but using the state form when one exists is safest.
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