What Is a Lien Waiver? Types and When to Collect One

What a lien waiver protects against

A mechanic's lien is a legal claim against the property itself, filed by someone who worked on it or supplied materials and wasn't paid. While it sits on the record, the owner can struggle to sell or refinance. In the worst case the owner pays twice: once to the general contractor (GC), and again to the unpaid sub to clear the lien.

That risk runs down the payment chain. The owner pays the GC, the GC pays its subcontractors (the trade companies it hires for parts of the job), and the subs pay their suppliers. A missed payment anywhere can end up as a lien on the owner's property. So each payer asks the party it pays for a waiver, and owners and construction lenders often won't fund a draw, a scheduled payout on the job, until the GC hands over waivers from its subs.

The four common types of lien waiver

Most waivers come in four types, built from two questions. Does the waiver cover a progress payment, meaning a payment for work done so far, or the final payment? And does it take effect when signed, or only once the money arrives?

• A conditional progress waiver gives up lien rights for one progress payment, but only once that payment is actually received.
• An unconditional progress waiver states that the signer has been paid that progress payment and gives up the rights immediately.
• A conditional final waiver covers the last payment on the job, usually including retainage, and takes effect once that payment is received.
• An unconditional final waiver states that the signer has been paid in full and ends its lien rights on the job, apart from any exception its form allows.

Progress waivers name a "through" date, the last day of work they cover. What else they leave out depends on the form. The statutory progress forms in Arizona and Florida both leave out retainage, but only Arizona's also leaves out pending changes, so check your own state's form.

The unconditional version carries the risk. A sub that signs it before the money clears, and then sees the check come back, has given up its lien rights for money it never got. So the usual order is conditional first, unconditional after. The trade-offs are covered in more depth under conditional vs unconditional lien waivers.

When to collect a lien waiver

For an accounts payable (AP) team, the people who pay the company's bills, the rule is short: no waiver, no payment, as long as your subcontract makes waivers a condition of payment. If it doesn't, ask a construction attorney before you hold money, because prompt payment rules vary by state. On a job billed monthly, the rhythm usually looks like this:

1. The sub sends its pay application, the monthly bill for work completed, with a conditional progress waiver for the amount you're about to pay and a through date that matches the billing period.
2. AP checks that the waiver matches the payment, with the same project, payer, amount and through date.
3. You release the payment.
4. With its next pay app, the sub sends an unconditional progress waiver for the payment it just received. That's the document you pass up to the owner or lender.
5. At closeout, the end of the job when the last paperwork and payments are settled, you collect a conditional final waiver with the final bill and an unconditional final waiver once that last payment has cleared.

The amount on the waiver should match the payment, not the bill. If a sub bills $20,000 and you hold back 10% as retainage, money kept until the job is finished, you're paying $18,000, so the waiver should say $18,000. A conditional waiver written for $20,000 is waiting on a $20,000 payment that isn't coming.

Don't stop at your direct subs. Depending on the state, your framer's lumber yard may have lien rights of its own. On large payments and at closeout, ask each sub for waivers from its main suppliers and its own subs.

Tracking waivers per pay app: a worked example

A GC building six townhomes pays its subs once a month, after the owner funds the draw. Every subcontract has 10% retainage and makes waivers a condition of payment. Here is the GC's waiver log for pay app 4, which covers April:

Total due this cycle is $51,750 ($28,800 + $13,050 + $9,900). Only the framing file is complete, so AP releases $28,800 today. The electrician's $13,050 waits for the unconditional waiver on the March payment. The plumber's $9,900 waits for a corrected conditional waiver, because one written for the gross $11,000 doesn't match what's being paid.

Without the electrician's March waiver, the GC's package for the March draw is incomplete, and the owner may slow its next draw.

Keep one log per job, with a row per sub and a column for each pay app. At closeout it shows whose final waivers are still out.

State rules for lien waivers

Lien law is state law, and states handle waivers very differently. Some write the wording into the statute and won't enforce anything else.

Arizona is one of the strict ones. Under A.R.S. 33-1008, a waiver is unenforceable unless it substantially follows one of four statutory forms, conditional or unconditional for a progress or final payment, and is signed by the claimant (the party giving up its lien rights) or its authorized agent. A conditional waiver also needs evidence of payment, such as the claimant's endorsement on a check that the bank has paid.

The exceptions are narrow: a claimant actually paid in full, or a settlement of a genuine dispute or court case that names the lien claim. Arizona's progress forms don't cover retention (Arizona's word for retainage), pending changes, or anything furnished after the through date.

Florida works differently. Section 713.20 of the 2026 Florida Statutes sets one progress form and one final form, and says no one may require a lienor, anyone with lien rights, to sign a waiver that differs from them. But a waiver that isn't substantially similar to those forms is still enforceable on its own terms, so a sub who signs a GC's broader form may be bound by it.

A Florida lienor who signs in exchange for a check may make the waiver conditional on the check being paid. Lien rights can't be waived in advance, only for labor, services or materials already furnished.

Those are two states, and statutes change. Check your own state's form, and a construction attorney can confirm what it requires.

Common lien waiver mistakes

Paying first and planning to collect the waiver later is the classic one. Once the money is gone, a busy sub has little reason to send paperwork.

A waiver that doesn't match the payment is close behind. A wrong amount, through date or project address, or a signature from an affiliate instead of the company you paid, leaves room for an argument later.

Read where the signer lists disputed claims, if the form has that line. On Arizona's unconditional final form, $9,400 of disputed extra work written in stays unreleased. Florida's statutory final form has no such line.

Retainage gets forgotten too. Arizona's and Florida's statutory progress forms exclude it, so the retainage you release at closeout needs final waivers from every sub.

Keeping waivers tied to payables

The simplest control is to treat the waiver like an approved invoice, and add it as a checkpoint in your accounts payable process. Put the check in your invoice approval workflow rather than in one person's memory.

If your sub and supplier bills run through Clyr's bill pay and accounts payable, its approval policies route by amount, vendor or who spent, with as many steps as your policy actually has. The person who keeps the waiver log can be one of those steps.

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