Construction Contractors: Liens, Bonds, and Getting Paid

Your license lets you do the work. It does not make sure you get paid for it. The tool that actually protects a contractor's payment is the mechanics lien -- a legal claim against the property itself -- backed up by bonds, lien waivers, retainage rules, and prompt-payment statutes. Every one of these has sharp deadlines, and in this business a missed deadline can permanently wipe out a right you would otherwise have had. This guide walks through the mechanics at the level every contractor and sub should understand, and then sends you to the two places that actually govern your job: your state's lien statute and whichever agency licenses your trade where you work.

The mechanics lien: your claim against the property

A mechanics lien (sometimes called a construction lien or materialman's lien) lets a contractor, subcontractor, or supplier who furnished labor or materials to improve real property record a claim against that property when they aren't paid. Unlike a lawsuit against a person, a lien attaches to the property itself -- which usually gets an owner's or a lender's attention fast, because it clouds title and can block a sale or refinance.

Every state has some version of lien rights for contractors. But that's close to the only thing that's uniform. States differ sharply on:

• Who has to send a preliminary or pre-lien notice -- often required of subcontractors and suppliers who have no direct contract with the owner, sometimes required of everyone, sometimes not required at all, depending on the state and the type of project.
• When that notice is due -- typically tied to when you first furnish labor or materials, on a clock whose length is set by each state's statute.
• When the lien itself must be recorded -- typically tied to your last day of work or the project's completion, again on a clock that varies by state.
• How long you then have to sue to enforce (foreclose) the lien once it's recorded, before it expires on its own.
• What kind of project you're on -- many states have different notice rules for residential work than for commercial, and separate rules again for public projects.

Some states require a separate notice for every unpaid month rather than one notice at the start of the job. Some states are unforgiving about a late notice; others are more flexible. None of that is something a national guide can safely give you a number for -- and a wrong number is worse than no number, because you could rely on it and miss your actual deadline. Treat every deadline in this area as something you look up for your state, on this job, in writing.

What to do

1. Find your state's mechanics lien statute through your state legislature's or courts' official website, or ask the state agency that licenses contractors in your state -- many publish plain-language lien-notice guides for contractors and homeowners.
2. Calendar every deadline the moment you start a job -- the notice deadline, the recording deadline, and the enforcement deadline. Don't wait until you're chasing a slow payer to look them up.
3. Send preliminary notice even when you don't think you need to. It rarely hurts your relationship with the owner -- it's a routine, expected document in this industry -- and it can be the difference between having lien rights and not.
4. Track every property address, owner name, and legal description you'll need to record a lien. You often can't reconstruct this information later, and a defective description can sink an otherwise valid lien.

Bonds: how paper backs up (or replaces) the lien

On many jobs -- especially larger commercial work and government projects -- a lien isn't your only tool, or isn't available at all, and a bond takes its place.

• Payment bonds guarantee that subcontractors and suppliers get paid even if the general contractor doesn't pay them. If a project is bonded, unpaid subs typically make a claim against the bond instead of (or in addition to) filing a lien.
• Performance bonds guarantee to the owner that the contracted work will actually get finished according to the contract, protecting the owner if the contractor defaults.
• Surety bonds more broadly are a three-party arrangement: a bonding company (the surety) guarantees your performance or payment to the project owner, and you agree to reimburse the surety if it has to pay out. A bond is not insurance for you -- if the surety pays a claim, it can come after you and, commonly, after the owners who signed the indemnity agreement personally. Many states also require a license bond just to hold a contractor's license; that's a separate thing from a project payment or performance bond, and bond requirements and amounts are set state by state.

On federal construction work, you generally can't record a mechanics lien against government-owned property at all, so Congress created a substitute: the Miller Act. It requires the prime contractor on qualifying federal construction contracts to furnish a payment bond protecting subcontractors and suppliers, alongside a performance bond protecting the government. Whether the Act's bond requirement applies depends on a contract-price threshold set in federal law, and smaller federal construction contracts can carry alternative payment protections instead of a full payment bond. Miller Act claims come with their own strict notice and suit deadlines, entirely separate from any state's lien statute -- so if you're working or subcontracting on a federal job, read your contract's bond documents and check the current federal acquisition rules on bonds rather than assuming state lien law applies. State and local public projects usually have their own bond statutes, often modeled on the Miller Act but with different deadlines; those are state law, so check the specific statute for the project.

If bonding capacity is what's keeping you off larger jobs, the U.S. Small Business Administration runs a surety bond guarantee program that helps smaller contractors qualify for bonding through participating sureties. It's worth a look before you assume you can't bid bonded work.

Lien waivers: don't sign away a right you haven't been paid for

A lien waiver is a document where you give up some or all of your lien rights, usually in exchange for payment. Owners and general contractors routinely require them before releasing money, and signing them is a normal part of getting paid. But the wording matters enormously:

• Conditional waiver -- takes effect only once the payment actually clears. This is the safer one to sign before you have the money.
• Unconditional waiver -- takes effect immediately on signing, whether or not you actually get paid. If the check bounces or never arrives, an unconditional waiver you already signed can leave you with no lien rights and no leverage.
• Partial waiver -- covers only the amount paid so far (common with progress payments).
• Final waiver -- covers the whole contract, usually signed at project completion.

The rule that protects you: don't sign an unconditional waiver before the payment has actually cleared. If someone hands you an unconditional waiver and asks you to sign it in exchange for a check, that's the moment to slow down, read exactly what it releases, and ask for a conditional form instead. Some states prescribe statutory waiver forms with specific required language and restrict what a waiver can do; others let the parties write their own. Using the wrong form, or your own custom wording, can make a waiver broader than you intended -- releasing retainage or change-order work you never meant to give up. Read what you're signing, and check whether your state has a required form.

Retainage

Retainage is a percentage of each progress payment that the owner or general contractor holds back until the job -- or a defined phase of it -- is substantially complete, as an incentive to finish and to cover punch-list work. It's standard practice. But the withheld percentage, when it must be released, and whether state law caps how much can be withheld all vary by state and by contract, and the rules are often different for public projects than for private ones. If retainage is sitting on a job you finished months ago, look up your state's prompt-payment or retainage statute for the release deadline before assuming you just have to wait it out. Note too that your lien or bond deadline may run from your last day of work -- not from the day retainage was supposed to be released -- so waiting patiently for withheld money can quietly run out your clock.

Prompt-payment statutes

Most states have prompt-payment laws that set deadlines for owners to pay contractors, and for contractors to pay their subs, once a payment is due -- often with interest or penalties for late payment, and sometimes attorney's fees. Some apply only to public (government) contracts; others reach private work too. There's a separate federal Prompt Payment Act framework for federal contracts. These statutes are a real tool if you're being strung along, but their deadlines, penalties, and project coverage differ from state to state -- check your state's version rather than assuming a national rule, and don't let a prompt-payment claim distract you from preserving your lien or bond rights on the statutory clock.

Pay-if-paid vs. pay-when-paid clauses

These two clauses look similar and mean very different things:

• Pay-when-paid is generally read as a timing provision -- the general contractor should pay the sub within a reasonable time, but doesn't get to withhold payment forever just because the owner hasn't paid.
• Pay-if-paid tries to make the owner's payment to the general contractor a true condition of the sub ever getting paid at all -- if the owner never pays, under this clause the sub may not get paid either.

Whether a pay-if-paid clause is enforceable depends heavily on state law: some states enforce them where the contract language is clear and explicit, others limit or void them as against public policy, and some hold that even a valid pay-if-paid clause doesn't waive your lien or bond rights. Read your subcontract for this clause before you sign it, price the risk if it's there, and understand that it can shift the risk of the owner's nonpayment onto you.

Licensing and enforcing your own contract

Beyond losing lien and bond protections, working without the license required for your trade carries a separate, harsher risk. In many states, an unlicensed contractor cannot sue to enforce their own construction contract at all -- meaning you could do the work, not get paid, and have no court remedy even for a clear breach, on top of possible fines. Some states go further and let an owner recover money already paid to an unlicensed contractor.

Who licenses you varies: some states license general contractors and trades at the state level, others leave it to counties or cities, and the specific trades covered, the scope each license permits, and the dollar level at which a license is required are all set locally. If you're not sure your license -- or your subcontractors' licenses -- are current for the scope and location of a job, confirm it with the licensing agency for that jurisdiction before work starts, not after a payment dispute.

Worker classification matters here too: whether the people on your crew are employees or independent contractors is a legal question decided by the actual working relationship, not by a label in a contract or a signed agreement, and misclassifying them creates back-pay and payroll-tax exposure separate from any lien or payment dispute. If a crew member is hurt, that's a workers' compensation question, and it's another reason classification isn't something you get to choose.

Where deadlines and dollar amounts actually live

Nothing in this article should be read as a specific deadline, bond amount, retainage percentage, or fee for your state -- those change, and they vary by state and sometimes by city or county. For the current notice deadlines, recording deadlines, and enforcement periods that apply to you, go to your state's official lien statute (usually published through your state legislature's website) and the agency that licenses contractors where you're working, and confirm before you rely on any number. For general help getting a construction business on solid footing, the SBA's free local assistance network -- Small Business Development Centers and SCORE -- costs nothing.

This is general information, not legal, tax, or financial advice, and reading it doesn't create an attorney-client relationship. For a specific job, a large unpaid balance, or a lien or bond claim you're about to file or respond to, talk with a construction attorney licensed in your state -- lien deadlines are unforgiving enough that a short consultation early is worth far more than a good argument made late.