How Subcontractors Get Paid: The Lien Notice System Explained
Subcontractors get paid by preserving their legal right to payment through the mechanics lien system — a chain of statutory protections that begins, in most states, with a preliminary notice served within 20 days of first furnishing labor or materials. Without that notice, a subcontractor who has no direct contract with the property owner has no guaranteed path to payment if the general contractor goes dark or the owner refuses to release funds. The mechanics lien is the enforcement tool; the preliminary notice is the key that unlocks it. In states like California (Cal. Civ. Code § 8200), Arizona (A.R.S. § 33-992.01), and Nevada (NRS § 108.245), filing deadlines are hard — miss them, and your lien rights are extinguished entirely for work furnished before the notice date.
Why Don't Subcontractors Just Sue to Get Paid?
Suing is an option, but it is slow, expensive, and puts you at the back of the line when a GC or developer has multiple creditors. A mechanics lien, by contrast, attaches directly to the real property itself — meaning the owner cannot sell or refinance the project without satisfying the lien. That leverage is what makes the lien system the single most effective payment tool available to subcontractors. A breach-of-contract lawsuit can take 12 to 18 months to resolve; a properly filed mechanics lien often produces payment in 30 to 90 days because no property owner or lender wants a lien clouding title.
The math is stark. According to Rabbet's 2024 Construction Payments Report, slow payments cost the U.S. construction industry an estimated $280 billion in 2024, adding roughly 14% to total construction spending. Most of that loss falls on subcontractors and suppliers — the parties with the least direct control over when funds are released. The lien system exists precisely because legislatures recognized that subs and suppliers needed a statutory remedy that did not depend on the goodwill of the GC or the owner.
How Does the Construction Payment Chain Work?
Money in construction flows from the top down: owner to general contractor to subcontractor to sub-tier subcontractor to supplier. The problem is that subcontractors rarely have a direct contract with the property owner, which means they have no direct legal claim against the person who actually controls the project funds. The mechanics lien system bridges that gap by granting subs and suppliers a statutory right to place a claim against the property itself, regardless of who they contracted with.
Here is the typical payment chain on a private commercial project:
- Owner funds the project, often through a construction loan from a lender
- General Contractor (GC) receives progress payments from the owner, typically on a monthly schedule after submitting a pay application
- Subcontractor submits a pay application to the GC, who consolidates it into the owner pay app
- Sub-tier sub or supplier invoices the subcontractor
At every link in this chain, there is a pay-when-paid or pay-if-paid clause in most subcontracts — meaning the GC does not have to pay the sub until the GC gets paid by the owner, or in some states, not even then. That clause is exactly why lien rights matter: they give the sub a direct remedy against the property that bypasses the GC entirely.
What Is a Preliminary Notice and Who Has to File One?
A preliminary notice — also called a "notice to owner," "prelim," or "20-day notice" depending on the state — is a written document served at the start of a project that formally notifies the property owner, general contractor, and construction lender that you are working on their project and intend to preserve your lien rights. In most states, filing this notice is a mandatory prerequisite to filing a mechanics lien later. Subcontractors, material suppliers, equipment lessors, and sub-tier subcontractors are typically required to serve it.
State-by-state deadlines vary, but the core rule is consistent: serve the notice early or lose your rights.
| State | Notice Name | Deadline | Governing Statute |
|---|---|---|---|
| California | 20-Day Preliminary Notice | 20 days from first furnishing | Cal. Civ. Code § 8200 |
| Florida | Notice to Owner | 45 days from first furnishing | Fla. Stat. § 713.06(2)(c) |
| Arizona | Preliminary 20-Day Notice | 20 days from first furnishing | A.R.S. § 33-992.01 |
| Nevada | Preliminary Notice | 31 days from first furnishing | NRS § 108.245 |
| Washington | Notice of Right to Claim Lien | 60 days from first furnishing | RCW § 60.04.031 |
| Oregon | Notice of Right to a Lien | 8 days from first furnishing | ORS § 87.021 |
Oregon's 8-day deadline is the shortest in the country. If you are a subcontractor in Oregon and you wait until you receive your first invoice before thinking about notice, you have likely already missed the window.
What Happens If You Miss the Preliminary Notice Deadline?
Missing the preliminary notice deadline does not always wipe out 100% of your lien rights, but it severely limits them. In California, late service restricts lien protection to labor and materials furnished within the 20 days before the notice was served — everything before that window is unprotected. In Florida, a subcontractor who fails to serve a Notice to Owner within 45 days of first furnishing forfeits all lien rights entirely under Fla. Stat. § 713.06(2)(c), with no partial recovery.
The practical consequence: if you did $80,000 of work over four months and never served a prelim, you may have zero lien rights on $60,000 of that work. You are now dependent entirely on the GC honoring the contract — and if the GC goes out of business or the owner disputes the work, you have no property claim to fall back on.
Not sure where your deadline falls?
How Do You Actually Serve a Preliminary Notice?
Serving a preliminary notice correctly requires using an approved delivery method — otherwise the notice is legally defective even if it was received. Most states require certified mail, registered mail, or personal delivery. Some states, including California, accept first-class mail with a certificate of mailing. Using regular email or handing a document to someone on the job site typically does not satisfy statutory service requirements.
The practical steps are:
- Identify the required recipients. Most states require service on the property owner, the GC, and the construction lender (if one exists). California's Cal. Civ. Code § 8200 requires all three. Florida's Fla. Stat. § 713.06(2)(c) requires service on the owner and the GC.
- Obtain the correct addresses. The owner's address is typically on the building permit or the Notice of Commencement (required in Florida under Fla. Stat. § 713.13). The GC's address is on your subcontract.
- Use the state-compliant form. Each state has specific language requirements. Using a generic template from another state is a common and costly mistake.
- Send via certified mail. USPS Certified Mail provides a tracking record and proof of delivery. The base fee is $4.85 in 2026 plus standard First-Class postage.
- Keep your proof of service. The Certificate of Mailing and the signed green card (or electronic delivery confirmation) are your evidence of compliance if the notice is ever challenged.
On a $15,000 subcontract, a single preliminary notice costs $24.99 through LienFlash. If that notice preserves your lien rights and produces payment on a job that would otherwise go unpaid, that is a return exceeding 60,000% on the cost of filing.
What Comes After the Preliminary Notice: The Mechanics Lien
The preliminary notice opens the door; the mechanics lien is what you walk through if payment stops. A mechanics lien is a formal claim recorded in the county where the property is located. It encumbers the title to the property and prevents the owner from selling or refinancing without addressing your claim. In most states, you must file the lien within a set number of days after the project is completed, after you last furnished labor or materials, or after a notice of completion is recorded — whichever triggers first.
California deadlines under Cal. Civ. Code § 8412: 90 days from completion of the project, or 60 days from recording of a Notice of Completion or Cessation. Florida deadlines under Fla. Stat. § 713.08: 90 days from the last day of furnishing labor, services, or materials. After filing the lien, most states require you to enforce it through a lawsuit within a separate enforcement deadline — in California that is 90 days from recording the lien; in Florida it is one year.
What Is a Lien Waiver and When Should You Sign One?
A lien waiver is a document that releases some or all of your lien rights in exchange for payment. GCs and owners routinely require subcontractors to sign lien waivers before releasing progress payments or final payment. There are four types, and signing the wrong one can permanently eliminate rights you have not yet been paid for.
- Conditional Waiver on Progress Payment: Waives lien rights only if and when the payment clears. This is the safest type for partial payments.
- Unconditional Waiver on Progress Payment: Waives lien rights immediately upon signing, regardless of whether the check clears. Do not sign this before the check is in your account.
- Conditional Waiver on Final Payment: Waives all lien rights only upon receipt of final payment. Acceptable as a final payment condition.
- Unconditional Waiver on Final Payment: Permanently waives all lien rights immediately upon signing. Only sign this after final payment has been received and deposited.
California codified standard lien waiver forms under Cal. Civ. Code §§ 8132–8138. Using non-standard language in California can render a waiver unenforceable. In states without standard forms, review every waiver carefully before signing — and if a GC is pressuring you to sign an unconditional waiver before payment, that is a red flag.
How Widespread Is the Payment Problem for Subcontractors?
The payment problem in construction is not a fringe issue. According to Rabbet's 2024 Construction Payments Report, 82% of contractors face payment waits of over 30 days, up from 49% just two years earlier. The average days sales outstanding (DSO) in construction is approximately 90 days — double the 45-day threshold that financial experts consider healthy. Meanwhile, 95% of general contractors and 75% of subcontractors report frequently floating payments while awaiting developer disbursements, according to NetSuite's construction payment management research.
Those numbers represent real cash flow problems — crews going without paychecks, material accounts going overdue, and small subcontracting businesses shutting down. The lien system is not a technicality. It is a legally mandated protection mechanism that exists specifically to counterbalance the structural payment imbalance between property owners and the subcontractors who build their projects.
Frequently Asked Questions
Do subcontractors need to file a preliminary notice on every job?
Yes, in most states, every subcontractor on a private commercial or residential project should serve a preliminary notice on every job, regardless of how well they know the GC or how simple the project seems. Lien rights are statutory — they do not depend on your relationship with the GC. Skipping the notice because you trust the GC is one of the most common reasons subcontractors end up unpaid with no legal remedy.
Does a preliminary notice mean you are threatening to file a lien?
No. A preliminary notice is a standard, legally required administrative document — not a threat or an indication that there is a payment dispute. Most experienced GCs and owners receive dozens of preliminary notices per project. Serving one does not damage a business relationship; it signals that you are a professional who understands your legal rights.
What is the difference between a preliminary notice and a mechanics lien?
A preliminary notice is served at the beginning of a project to preserve future lien rights. A mechanics lien is recorded later — typically after a payment dispute — against the property itself. You cannot file a valid mechanics lien in most states if you failed to serve the preliminary notice on time. They are two steps in the same process, not interchangeable documents.
Can a GC contractually waive a subcontractor's right to file a lien?
No. In nearly every state, a subcontractor's lien rights cannot be waived in advance by contract. A clause in a subcontract that attempts to eliminate lien rights before any work is done is generally void and unenforceable as a matter of public policy. However, a properly executed lien waiver after work is performed and payment is received is valid.
What happens after you file a mechanics lien?
After recording a mechanics lien, you must enforce it within the state's enforcement deadline by filing a lawsuit to foreclose on the lien. In California, that is 90 days from recording. In Florida, it is one year from the date the lien is recorded. If you do not file suit within the enforcement window, the lien expires and you lose the claim. In practice, many lien disputes resolve before foreclosure because property owners do not want a lien on title.
Do lien rights apply on public projects like government buildings?
No. Mechanics liens cannot be filed against government-owned property. On public projects, the equivalent protection is a payment bond claim under the Miller Act (federal projects, 40 U.S.C. § 3133) or state Little Miller Act statutes. The preliminary notice and deadline rules are different for bond claims — check your state's specific requirements before assuming your private-works process applies.
How long does it take to serve a preliminary notice through LienFlash?
LienFlash can generate a state-compliant preliminary notice and send it via USPS Certified Mail in approximately two minutes. You enter the project details, the system generates the attorney-reviewed form, and it goes out the same business day. You receive a Certificate of Mailing PDF as proof of service.
What is a Notice of Commencement and how does it affect my lien rights?
A Notice of Commencement (NOC) is a document that property owners in states like Florida are required to record before construction begins under Fla. Stat. § 713.13. It identifies the property, the owner, the GC, and the construction lender. In Florida, the NOC establishes the lienable interest in the property and sets the clock for subcontractor preliminary notice deadlines. Subcontractors should obtain a copy of the recorded NOC at the start of every Florida project — it contains the addresses you need to serve your Notice to Owner correctly.
Protect Your Lien Rights Today
Every day you work on a job without a preliminary notice on file is a day your payment is at risk. Deadlines in states like Oregon (8 days) and California (20 days) move fast — and once they pass, no amount of work quality or good relationships with the GC can restore the lien rights you forfeited. LienFlash files state-compliant preliminary notices via USPS Certified Mail in about two minutes, at $24.99 per notice or $49/month for the Pro plan. Calculate your exact deadline for every active job, then file before the clock runs out.