Lien Waiver Guide: Conditional vs Unconditional Waivers

Quick answer: A lien waiver is a signed release in which a contractor, subcontractor or supplier gives up mechanics lien rights for a stated amount, usually in exchange for payment. A conditional lien waiver takes effect only once you are paid. An unconditional waiver takes effect when signed, even if payment fails. Sign conditional waivers with your invoice, unconditional ones after funds clear.

If you work in US construction, lien waivers arrive with almost every payment. The owner, the general contractor or the construction lender wants proof that everyone below them has been paid, so nobody can file a lien on the property later. For the contractor signing them, a lien waiver is the most important piece of paper after the invoice itself, because the wrong form at the wrong time can give away your best collection tool. Keep your billing tidy first: issue each pay request as a numbered invoice from our US invoice generator so every waiver can reference a clear amount and date. If you bill in another currency or format, the main invoice generator handles that too.

This guide explains the four types of lien waiver, conditional vs unconditional in plain English, state form rules, a worked example tying waivers to a pay application, and a checklist before you sign. It complements our construction invoice guide, which covers progress billing and retainage, and our mechanics lien guide, which explains the lien rights you are waiving.

General information, not legal advice. Lien and waiver laws vary significantly by state, and the property's state controls.

What a lien waiver does

A mechanics lien lets an unpaid contractor or supplier claim an interest in the property it improved. That is powerful leverage, which is exactly why owners and lenders want it released as payments are made. A lien waiver is that release. It typically states:

• who is waiving (the claimant) and for which project and property;
• who is paying and the amount;
• the date through which work is covered;
• whether the waiver is conditional on receiving payment;
• any exceptions, such as retainage, unpaid change orders or disputed claims.

Lien waivers flow up the payment chain. A supplier gives one to the subcontractor, the subcontractor gives one to the general contractor, and the general contractor delivers the bundle to the owner or lender with its own waiver and its AIA G702 pay application.

The four types of lien waiver

Lien waivers are sorted along two lines: conditional or unconditional, and progress or final. That produces four forms, and states that prescribe forms usually provide all four.

Waiver type	Takes effect	Covers	When to sign	Risk to you
Conditional progress	On receipt of the stated payment	Work through a stated date	With each pay request	Low
Unconditional progress	On signing	Work through a stated date	After that payment clears	Medium if signed early
Conditional final	On receipt of final payment	All work on the project	With final invoice	Low
Unconditional final	On signing	All work on the project	After final payment clears	High if signed early

Conditional vs unconditional lien waivers

The conditional vs unconditional distinction is the one that protects your money.

Conditional lien waiver

A conditional waiver says, in effect: "once I receive this payment, I release my lien rights for this amount." If the check bounces, the wire never arrives or the payment is short, the waiver does not take effect and your rights survive. California's statutory conditional progress form, in Civil Code section 8132, carries a notice that it waives rights effective on receipt of payment, and warns that nobody should rely on it unless satisfied the claimant has been paid.

Unconditional lien waiver

An unconditional waiver releases rights immediately, whether or not money changed hands. It is effectively proof of payment. Statutory unconditional forms in states such as California and Texas carry bold warnings at the top for this reason. Never sign one in advance in the hope of speeding up payment.

A good habit: send a conditional waiver with every invoice, and send the matching unconditional waiver as soon as the payment clears, ideally with a payment receipt. That keeps the paying party happy without exposing you.

Progress vs final lien waivers

A progress waiver covers work up to a specific through date, typically the end of a monthly billing period. It does not affect later work, and statutory progress forms usually carve out retention, unpaid extras and earlier unpaid amounts.

A final waiver covers the whole job. Signing an unconditional final waiver generally ends your lien rights on the project, so before signing confirm that:

• all approved change orders have been paid;
• retainage has been released and received;
• any disputed amounts are either resolved or listed as exceptions, if the form allows.

State rules: statutory forms and enforceability

Some states set out the exact wording a lien waiver must use. In those states, a waiver that does not follow the statutory form may be unenforceable, which protects contractors from one-sided owner forms.

• California: the Civil Code provides four statutory waiver forms (conditional and unconditional, progress and final) in sections 8132 to 8138. A progress waiver is unenforceable unless it follows the statutory form and the claimant was paid, or a check was given in exchange, as set out in California Civil Code section 8132.
• Texas: Property Code section 53.284 requires waivers to substantially comply with one of four forms covering conditional and unconditional, progress and final payments. Waivers that do not are unenforceable, as summarised in Texas Property Code section 53.284.
• Other states: several more states prescribe forms or set rules on when waivers are valid, while many have no statutory form. Where no form exists, read the owner's or GC's form line by line.

The rule that matters is the law of the state where the property sits, so a contractor working across state lines may need several sets of forms.

Worked example: waivers on a progress payment

A drywall subcontractor has a $120,000 subcontract with 10% retainage. Its third monthly pay request covers work through 30 September 2026.

Item	Calculation	Amount
Work completed in previous periods	From pay requests 1 and 2	$51,000.00
Previous payments received	$51,000.00 - 10% retainage	$45,900.00
Work completed this period	September progress	$27,000.00
Retainage held this period	$27,000.00 x 10%	-$2,700.00
Payment requested	$27,000.00 - $2,700.00	$24,300.00
Total retainage held to date	$78,000.00 x 10%	$7,800.00

Step by step:

1. The subcontractor sends its invoice for $24,300.00 with a conditional progress waiver for $24,300.00, through 30 September 2026.
2. The GC pays by check on 20 October. The subcontractor deposits it and waits for it to clear.
3. Once cleared, it signs an unconditional progress waiver for $24,300.00 through 30 September and sends it with a receipt.
4. Its total received is now $70,200.00 ($45,900.00 + $24,300.00), and $7,800.00 of retainage remains outstanding and outside the waiver.
5. At project end it bills the remaining work and the retainage, sends a conditional final waiver, and signs the unconditional final waiver only after the final payment clears.

Using a partial payment invoice layout makes these running totals easy to show on each bill.

Checklist before you sign any lien waiver

1. Is it conditional or unconditional? If unconditional, has the money actually cleared?
2. Is it progress or final? Never sign a final waiver for a progress payment.
3. Does the amount match your invoice exactly?
4. Is the through date correct, not later than the work you are being paid for?
5. Are retainage, unpaid change orders and disputed claims excluded?
6. Does it waive bond rights or other claims as well as lien rights?
7. Is it on the required statutory form for the property's state, if there is one?
8. Does it contain extra promises, such as indemnities, that do not belong in a waiver?

If anything looks wrong, mark it up and return it, or ask for advice. Correcting a form takes a day; undoing a signed waiver may not be possible.

Payment method matters too. A wire or ACH transfer that has landed in your account is easy to confirm. A check is not cleared just because it has been deposited, and a joint check payable to you and your supplier needs both endorsements. Many statutory forms recognise this by tying the conditional waiver to a specific check or payment, so fill in the payer, the amount and, where the form asks, the check details. When in doubt, wait until your bank shows the funds as available before signing the unconditional version. A delay of a few days is a minor inconvenience for the GC, while an unconditional waiver for money you never received can be impossible to reverse.

Who asks for lien waivers and why

The party asking for a waiver is usually protecting itself, and knowing its motive helps you negotiate.

• Owners want to avoid paying twice: once to the GC and again to a subcontractor who files a lien because the GC did not pay it.
• Construction lenders want a clean title for their mortgage, so they often release each draw only against a full set of waivers.
• General contractors need waivers from their subs and suppliers to hand up the chain, and may hold your payment until the full set is in.
• Title companies ask for final waivers before insuring a sale or refinance after completion.

Because the paying party is protecting itself, a conditional waiver usually gives it everything it legitimately needs. Pressure to sign an unconditional waiver early is a request to shift the payment risk onto you.

Lien waivers and your invoices

Waivers and invoices should tell the same story. On each invoice, show the through date, the work completed, retainage withheld and amount paid to date, and reference the waiver you are sending. A clear contractor invoice template with these fields saves back-and-forth with the GC's accounts team. Trades such as electricians, plumbers and roofers will see the same waiver requests on commercial jobs.

If a payment never arrives despite your conditional waiver, your lien rights are intact, but the deadlines to use them keep running. Our guide to a client not paying an invoice covers the softer steps before you consider a lien.

Common lien waiver mistakes

• Signing an unconditional waiver to "help" the GC close a draw before your check arrives.
• Using a final waiver form for a progress payment.
• Leaving the through date blank or later than the period paid.
• Forgetting to collect waivers from your own suppliers and sub-tier subcontractors, which can hold up your payment.
• Not keeping signed copies with the matching invoice and payment record.
• Signing a waiver that includes extra language, such as a release of all claims or an indemnity, which goes beyond the payment in question.
• Accepting a joint check without checking which waiver it triggers and whether every payee has endorsed it.

A simple log fixes most of these. For each project, keep one row per payment with the invoice number, amount, through date, conditional waiver sent, payment received date and unconditional waiver sent. When a GC or title company asks for proof months later, you can answer in minutes.

Invoice clearly, then waive with confidence

A lien waiver should always match a clear invoice: same amount, same through date, same project. Create numbered progress invoices in our free invoice generator, show retainage and amounts already paid, and download a PDF to send with your conditional waiver. For a formal look that suits commercial clients, try the classic invoice template.