On Washington public works projects, subcontractors, material suppliers, and sub-subcontractors who are not paid can make a claim against the prime contractor's payment bond under RCW 39.08. To preserve that right, claimants who do not have a direct contract with the prime contractor must serve written notice of their claim on the prime contractor within 30 days after completion of the contract work, and must file any lawsuit on the bond within four years of project completion under RCW 39.08.030. Missing either deadline eliminates your right to recover against the bond. Mechanics liens are not available on public property in Washington, so the payment bond is often your only collection tool when a GC or upstream sub stops paying.
Who Can File a Washington Public Works Payment Bond Claim?
Washington's public works payment bond statute, RCW 39.08, covers subcontractors, material suppliers, and sub-subcontractors who furnish labor, materials, or equipment to a public works project. A sub-subcontractor—a company hired by a subcontractor rather than the prime contractor directly—is explicitly included in the class of claimants protected under RCW 39.08.010.
The payment bond is required on all Washington public works contracts exceeding $35,000 under RCW 39.08.010. On contracts at or below that threshold, a bond may not exist, which eliminates this remedy. Before you assume a bond is in place, verify by contacting the awarding public body or reviewing the contract documents. The bonding requirement applies to projects awarded by state agencies, counties, cities, school districts, port districts, and other public bodies.
Notably, mechanics liens against public property are prohibited in Washington. This makes the payment bond the primary statutory protection for unpaid subcontractors and suppliers on public work. According to Rabbet's 2024 Construction Payments Report, 82% of contractors face payment waits of over 30 days—on public jobs without lien rights, the bond claim is the difference between getting paid and absorbing the loss.
What Notice Requirements Apply to Washington Public Works Bond Claims?
Whether you need to serve pre-claim notice depends on your contractual relationship with the prime contractor.
If you have a direct contract with the prime contractor: No pre-claim written notice is required before filing suit on the bond under RCW 39.08.030. You can proceed directly to a bond claim if payment is not made.
If you do NOT have a direct contract with the prime contractor (i.e., you are a sub-subcontractor or a supplier to a subcontractor): You must serve written notice of your claim on the prime contractor within 30 days after the completion of the contract work, per RCW 39.08.030. This is not the date you finished your own scope—it is the date the overall contract is completed.
The notice must be served in a manner that creates proof of delivery. Certified mail provides a documented timestamp and delivery confirmation, which is critical if the prime contractor later disputes receipt. Keep a copy of your notice letter and your mailing receipt. Failing to serve this notice when required is a complete bar to recovery on the bond for indirect claimants.
What Are the Washington Little Miller Act Bond Claim Deadlines?
Washington's public works payment bond statute is often called the "Little Miller Act" (paralleling the federal Miller Act), and its deadlines are strict and unforgiving.
Notice deadline for indirect claimants: Written notice to the prime contractor within 30 days of project completion (RCW 39.08.030). This applies to sub-subcontractors and suppliers who lack a direct contract with the prime.
Deadline to file suit: Any action on the payment bond must be commenced within four years of the completion of the contract, per RCW 39.08.030. This is the outside limit—but waiting that long is strategically unwise. Bonding companies and their attorneys become harder to engage as projects age, witnesses disappear, and documentation is harder to reconstruct.
A word of caution: "completion of the contract" is a defined event, but disputes about exactly when the contract was completed do arise—particularly on projects with lengthy punch-list periods or disputed substantial completion dates. Document your project completion dates carefully and do not rely on informal conversations with the GC.
What Documents Are Required for a Washington Public Works Bond Claim?
You do not file a Washington public works bond claim with a court or government office to initiate the process—you assert the claim against the bond surety (and the prime contractor) by providing proper notice and, if necessary, filing a lawsuit. Here is what you need to have ready:
To serve your initial notice (indirect claimants only):
- Written notice letter identifying the project, the parties, the scope of work, and the amount unpaid
- Proof of mailing (USPS Certified Mail tracking and Certificate of Mailing)
To support a bond claim or lawsuit:
- Your subcontract or purchase order
- Invoices and statements showing the amount owed
- Proof of delivery of materials or completion of work (delivery receipts, signed field tickets, change orders, pay applications)
- Correspondence showing non-payment (emails, demand letters, payment denial notices)
- Bond information: the bond number, the surety company name, and the penal sum of the bond. This information is a public record available from the awarding public body.
- Any lien waivers or conditional payment documents already signed
The more organized your documentation, the faster a surety resolves the claim. Sureties are not required to pay undocumented claims, and gaps in your paper trail give them leverage to delay or deny.
How to File a Payment Bond Claim on a Washington Public Works Project
Here is the practical sequence for asserting a bond claim in Washington:
Step 1 — Confirm the bond exists. Contact the awarding public body (city, county, school district, state agency) and request a copy of the prime contractor's payment bond. Note the bond number, surety company, and penal sum.
Step 2 — Serve written notice if you are an indirect claimant. If you do not have a direct contract with the prime contractor, prepare and serve written notice on the prime contractor within 30 days of project completion. Send by USPS Certified Mail and retain your Certificate of Mailing.
Step 3 — Submit a bond claim to the surety. Contact the surety company identified on the bond and submit a formal claim letter with your supporting documentation (contract, invoices, proof of work, correspondence). Most sureties have a claims intake process. This step is not required by statute before filing suit, but it is standard practice and often resolves claims faster than litigation.
Step 4 — Demand payment from the prime contractor in writing. Send a formal demand letter to the prime contractor simultaneously or before contacting the surety. This creates a record, and some prime contractors will pay rather than trigger a bond claim against their bonding relationship.
Step 5 — File suit if necessary. If the surety and prime contractor do not resolve the claim, file a lawsuit in Washington superior court before the four-year statute of limitations expires under RCW 39.08.030. Consult a Washington construction attorney before filing—bond claim litigation is procedurally specific.
Can a Sub-Subcontractor Claim the Payment Bond in Washington?
Yes. RCW 39.08.010 explicitly protects sub-subcontractors—companies that have a contract with a subcontractor but no direct contract with the prime contractor. The critical difference is the notice requirement: sub-subcontractors must serve written notice on the prime contractor within 30 days of project completion, as described above.
This matters because the chain of payment on public jobs can have multiple tiers. A mechanical contractor might sub out insulation work to a specialty firm, which buys materials from a supplier. All three—the mechanical sub, the insulation sub-sub, and the material supplier—are protected under RCW 39.08, provided each meets the applicable notice requirements.
The protection extends to suppliers of materials used in the work, even if those materials were incorporated by someone else in the chain. The practical test is whether your labor or materials ended up in the project. If yes, and you were not paid, you have a potential bond claim.
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. For sub-subcontractors—who are furthest from the project owner and most exposed to payment chain failures—the bond claim right is not a technical detail. It is a core business protection.
What Happens After the Bond Claim Deadline Passes?
If you miss the 30-day notice deadline as an indirect claimant, or if you fail to file suit within four years of project completion, you lose your right to recover on the payment bond under RCW 39.08.030. There is no statutory provision in RCW 39.08 for late notice to be excused, and courts have consistently held these deadlines strictly.
Your remaining options after losing bond claim rights are limited and less certain:
- Contract claim against your direct customer: You can still sue the subcontractor or prime who hired you directly for breach of contract. This does not require bond compliance—but it leaves you unsecured and dependent on that company's ability to pay.
- Retainage bond claim: Separate from the payment bond, Washington public works projects are subject to retainage requirements under RCW 60.28. If retainage was withheld, a claim against the retainage fund may be available with different procedures and deadlines. Verify current retainage claim requirements under RCW 60.28 directly.
- Collection litigation: General civil collection against the non-paying party is always available but is slower and less certain than a bond claim against a bonded surety.
The core lesson: document your project completion dates from day one, and calendar the 30-day notice deadline the moment you know you have an indirect contract on a public works job.
Washington lien notice resources
How Does Washington's Public Works Bond Claim Differ from a Mechanics Lien?
On private projects in Washington, unpaid subcontractors and suppliers can file a mechanics lien against the property under RCW 60.04. On public projects, that right does not exist—you cannot lien public property.
The payment bond is the statutory substitute. Instead of encumbering property, the bond creates a pool of funds specifically to pay subcontractors and suppliers who perform on the project. The surety (a licensed insurance company) stands behind the prime contractor's payment obligations up to the bond's penal sum.
Key practical differences:
| Factor | Mechanics Lien (Private) | Payment Bond Claim (Public) |
|---|---|---|
| Property at risk | Yes — owner's property | No — surety's funds |
| Owner relationship | Claimant vs. owner | Claimant vs. prime/surety |
| Notice to prime required | Depends on tier | Yes, for indirect claimants |
| Filing deadline | Within 90 days of last work (RCW 60.04.091) | Within 4 years of project completion (RCW 39.08.030) |
| Lawsuit deadline | Within 8 months of lien filing (RCW 60.04.141) | Within 4 years of project completion (RCW 39.08.030) |
For Washington-specific private project lien requirements, see:
Frequently Asked Questions
Is a payment bond required on all Washington public works projects?
No. Under RCW 39.08.010, Washington requires a payment bond on public works contracts exceeding $35,000. On contracts at or below that threshold, no bond is statutorily required, which means this remedy may not be available. Always verify whether a bond exists by contacting the awarding public body before relying on this claim path.
What is the deadline to serve notice on the prime contractor as a sub-subcontractor in Washington?
Under RCW 39.08.030, an indirect claimant—any party without a direct contract with the prime contractor—must serve written notice of their claim on the prime contractor within 30 days after the completion of the contract. Missing this deadline bars recovery on the bond for indirect claimants.
How long do I have to file a lawsuit on a Washington public works payment bond?
Under RCW 39.08.030, you have four years from the completion of the contract to commence a legal action on the payment bond. This is a hard deadline. Consult a Washington construction attorney well before that date—litigation takes time to prepare, and waiting until the last moment is risky.
Do I need to file anything with the government to make a payment bond claim in Washington?
No government filing is required to assert a bond claim under RCW 39.08. The process involves serving notice on the prime contractor (if you are an indirect claimant), submitting a claim to the surety, and, if necessary, filing suit in Washington superior court. The bond information is available from the awarding public body.
Can a material supplier file a payment bond claim in Washington?
Yes. RCW 39.08.010 covers suppliers of materials used in a public works project, not just laborers and subcontractors. If you supplied materials that were incorporated into the project and you were not paid, you have a potential bond claim. The same notice requirements apply based on whether you have a direct contract with the prime.
What if I don't know who the surety is or can't find the bond?
Contact the awarding public body directly—city clerk, county purchasing office, state agency contracting officer, or school district business office. The payment bond is a public record and must be available upon request. The bond document will identify the surety company, bond number, and penal sum.
Does serving a notice of right to claim lien on a public project protect my bond claim rights?
No. A Washington Notice of Right to Claim Lien under RCW 60.04 is a private-project tool. It does not substitute for the bond claim notice required under RCW 39.08.030 on public works projects, and filing one on a public project does not preserve your bond claim rights. These are separate statutes with separate requirements.
What is the penal sum of the bond, and does it limit what I can recover?
The penal sum is the maximum dollar amount the surety is obligated to pay across all claimants on the bond. If multiple subcontractors and suppliers file claims that together exceed the penal sum, recoveries may be prorated. On larger public projects, the bond is typically sized as a percentage of the contract value, but you should verify the actual bond amount when you obtain the bond documents.
Protect Your Lien Rights on Every Washington Job
On public works projects, the payment bond is your only statutory safety net—and the deadlines under RCW 39.08 are unforgiving. A missed 30-day notice window as an indirect claimant is a complete loss of bond rights. There is no cure, no late filing, no exception buried in the statute.
The good news: staying protected is not complicated if you build notice discipline into your workflow from the moment you sign a subcontract. Know whether your project is public or private. Confirm a bond exists. Calendar the completion date and the 30-day notice deadline the day you first furnish work.
LienFlash helps Washington subcontractors track active jobs, calculate critical deadlines, and send attorney-reviewed notices via USPS Certified Mail—with a Certificate of Mailing PDF on file so you have documented proof when you need it.
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Use the deadline calculator to map your exact notice window based on your first-furnishing date: