Payment Bond CalculatorSliding-Scale Premiums for Miller Act & State Contracts
The payment bond is the only piece of the contract package that protects subcontractors, suppliers, and laborers — not the owner. Its amount is set by statute (100% of contract price under the Miller Act), but the premium you pay is set by the surety market using tiered SFAA-filed rate schedules. Enter your contract value below to get a verified premium range.
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Every Payment Bond Premium Is Paid Because of These Four Claimant Classes
Unlike the performance bond — which exists to get the project finished for the owner — the payment bond is the only surety instrument in U.S. construction whose beneficiaries are the prime's own downstream parties. Pricing tracks the surety's exposure to claims from the four groups below, not the owner's completion risk.
First-Tier Subcontractors
Direct subs holding a contract with the prime. Under 40 U.S.C. §3133(b)(1), they may file a Miller Act suit without any preliminary notice. Statute of limitations is one year from the last date of labor or materials furnished.
Second-Tier Sub-Subs
Parties in contract with a first-tier sub. Covered under 40 U.S.C. §3133(b)(2) but must deliver written notice to the prime within 90 days of last work, then sue within one year. Missing the 90-day window is the single most common reason Miller Act claims fail.
Material Suppliers
Suppliers delivering materials to the prime or a first-tier sub. Covered to the same two-tier depth as subcontractors. Remote suppliers (third tier and beyond) have no Miller Act standing — this is the statutory cliff that drives jobsite delivery documentation.
Laborers
Individual workers whose wages went unpaid. Treated as first-tier claimants regardless of whether they were employed by the prime or a sub. Prevailing-wage shortfalls on Davis-Bacon projects frequently surface as Miller Act claims.
The federal payment-bond lien surrogate exists because you cannot file a mechanic's lien against federal property. On state and municipal projects, the payment bond serves the same function under each state's Little Miller Act. On private projects where mechanic's lien rights exist, the bond and the lien coexist — but many private owners now contractually require the bond specifically to discharge lien rights.
The Bond Amount Is Not Calculated — It Is Your Contract Price
This is the single point where payment bonds differ from every other bond on this site. Auto dealer bonds, notary bonds, contractor license bonds — those are fixed by statute at a dollar amount. The Miller Act payment bond is set by formula: 100% of the contract payable.
40 U.S.C. §3131(b)(2) reads: "The amount of the payment bond shall equal the total amount payable by the terms of the contract." The only exception is when the contracting officer makes a written finding — "supported by specific findings" — that a bond at that level is impracticable. Even then, the payment bond floor is the performance bond amount (§3131(b)(2)(B)).
This is why the premium rate, not the bond amount, is what gets negotiated. Every dollar of contract value above $150,000 on a federal project (and above each state's Little Miller Act threshold on state projects) rides the same 1:1 bond-to-contract ratio.
Miller Act Payment Bond Amount
40 U.S.C. §3131(b)(2). Contracting officer may reduce only on written impracticability finding; floor is the performance bond amount.
The Federal Threshold Is $150,000. Your State's Threshold Could Be $5,000 — Or $500,000.
The Miller Act applies only to federal construction contracts. For state and local public works, each state's Little Miller Act sets its own threshold. A $75,000 Pennsylvania municipal job requires a payment bond; the same job in Virginia does not. Below is a sampling of the thresholds that most commonly drive our underwriting questions.
| State | Threshold | Statute | Practical Note |
|---|---|---|---|
| Arizona | All public contracts | ARS §34-222 | No dollar minimum — bond required regardless of size |
| California | $25,000 | Cal. Civ. Code §9550 | Payment bond required on all public works above threshold |
| Colorado | $150,000 | CRS §38-26-105 | Matches the federal Miller Act threshold |
| Florida | $100,000 state / $200,000 local | F.S. §255.05 | Two-track thresholds; local agencies can still require bond below $200K |
| Georgia | $100,000 | OCGA §13-10-1 | Separate requirements for state vs. local projects |
| New York | $100,000+ | State Finance Law §137 | Varies by public authority and contract type |
| Ohio | All public contracts | ORC §153.54 | No minimum — bond required on all state construction work |
| Pennsylvania | $5,000 | 62 Pa. C.S. §903 | Lowest threshold in the country |
| Texas | $25,000 (state) / $50,000 (local) | Tex. Gov’t Code Ch. 2253 | Payment bond separate from performance bond over $100K |
| Virginia | $500,000 | VA Code §2.2-4337 | Highest non-transportation threshold nationally |
| Washington | All public contracts | RCW 39.08.010 | No minimum; retainage serves as secondary protection |
This is not a complete list — all 50 states and D.C. maintain Little Miller Act statutes. For the full state-by-state breakdown plus claim-procedure variations, see our Miller Act and Little Miller Act requirements guide.
Why You Will Almost Never See a Standalone Payment Bond Quote
The Miller Act and every Little Miller Act require a performance bond and a payment bond for the same contract. Since the surety is already underwriting the performance risk (project completion) and the payment risk (sub and supplier payment) from the same contractor, the file gets priced as one transaction — a "P&P bond" — at a single blended rate.
That blended rate is what the sliding-scale calculator above returns. If you need just the performance side, use the performance bond calculator; the rate tables on both pages converge because the underwriting is shared.
For the full story on how the two bonds work together on the same contract, see our performance and payment bonds hub.
- Subs, suppliers, laborers (2 tiers)
- Federal lien surrogate
- Amount = 100% of contract
- Project completion guarantee
- Takeover / tender rights for surety
- Amount = 100% of contract
- Penalty if low bidder walks
- Typically 5%–10% of bid
- See bid bond calculator
From Unpaid Invoice to Federal Court — the Miller Act Timeline
The payment bond premium exists because this process has teeth. A sub who follows the statutory steps gets paid out of the bond even when the prime has gone bankrupt. Every step has a date-certain deadline — the most dangerous failure modes are the 90-day notice window and the one-year suit window.
- 1
Last Work Date
The clock starts on the claimant's last date of labor performed or materials furnished — not the invoice date, not the project completion date. Document with delivery tickets and signed daily reports.
- 2
Day 90: Notice (Second Tier)
Second-tier claimants must deliver written notice to the prime within 90 days of last work. Certified mail with return receipt is the standard; the notice must state the amount claimed with substantial accuracy and the party for whom the work was performed.
- 3
Surety Investigation
The surety receives the proof of claim, pulls the prime's payment records and indemnity file, and typically resolves within 30–60 days. Many claims settle here without litigation when documentation is tight.
- 4
Day 365: Suit Deadline
Miller Act suits must be filed in the U.S. District Court for the district where the contract was performed, within one year of last work. Miss this window and the claim is statutorily barred — no court has discretion to extend.
Why This Matters for Premium Pricing
Sureties build their premium using historical loss data from these exact claim proceedings. A contractor with a clean claim-free file pays the low end of the range above. A contractor whose file shows one paid claim in the last five years pays the middle. A contractor whose file shows a trade-credit or 90-day-notice dispute — even one that ultimately went in their favor — typically sees a rate hike or a collateral requirement on the next renewal. The premium is not a tax; it is a reflection of how much the surety expects to pay out on behalf of this specific account over the life of the relationship.
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Payment Bond Calculator: Real Questions
Answers from the underwriting desk — not marketing copy. All citations verified against 40 U.S.C., FAR, and each cited state statute.
Who does the payment bond actually protect?
The payment bond protects a specific class of project creditors — first-tier subcontractors, second-tier sub-subcontractors, laborers, and material suppliers who furnish labor or materials to the prime contractor or a first-tier sub. It does NOT protect the project owner (that is what the performance bond does) and it does NOT protect remote suppliers more than two tiers down. Under 40 U.S.C. §3133(b)(2), a second-tier claimant must give written notice to the prime within 90 days of their last date of work, then file suit in U.S. District Court within one year. First-tier claimants skip the 90-day notice but must still sue within one year of last furnishing.
Is there really a $5 million cap on Miller Act payment bonds?
No — this is a common misconception that spreads through surety calculators. 40 U.S.C. §3131(b)(2) requires the payment bond to equal the total amount payable under the contract. The contracting officer may set a lower amount only when they make a written finding — supported by specific findings — that a payment bond at the full contract amount is impracticable. Even then, the payment bond can never be less than the performance bond amount. Prior versions of the statute referenced tiered amounts based on contract size, but the current 40 U.S.C. §3131 language (following the 1999 amendments and implemented at FAR 28.102-1) replaces that with the 100%-of-contract default plus officer discretion.
Why are payment bonds almost always sold bundled with performance bonds?
Because the Miller Act and every state Little Miller Act require both for the same contract, sureties quote them as a combined package — the "P&P" bond — at a single blended rate. The underwriting review (financial strength, work-in-progress, single/aggregate limits) is identical for both, so pricing them separately would duplicate work without creating capacity. On private-owner projects where the owner only contractually requires a payment bond, the same bundled rate is used because the surety still has to underwrite the contract obligation. Expect to see a single premium quoted that covers both.
How do Little Miller Act thresholds affect my bond cost?
The premium rate does not change based on the state threshold — but whether you need a bond at all does. Virginia only requires the payment bond on non-transportation contracts above $500,000 (VA Code §2.2-4337). Pennsylvania sets the trigger at $5,000 (62 Pa. C.S. §903). California requires a payment bond on every public works contract above $25,000 (Cal. Civ. Code §9550). Arizona, Ohio, and Washington require bonds on effectively all contracts. If your state threshold is above your contract value, you may have no statutory bond obligation — though the awarding agency or project specs can still require one.
What happens when an unpaid subcontractor files a payment bond claim?
The sub sends a sworn proof of claim to the surety with invoices, the subcontract or purchase order, proof of delivery, and a statement of the unpaid balance. The surety investigates — usually 30 to 60 days — including requesting payment records from the prime and any conditional releases. If the claim is valid and unpaid, the surety pays the sub and then pursues reimbursement from the prime contractor under the general indemnity agreement the prime signed when the bond was issued. This is why payment bond claims do not just cost the prime the disputed invoice; they trigger the indemnity clause, personal guarantees, and a mark on the prime's surety file that affects future bonding capacity.
Does SBA bond-guarantee program pricing differ for payment bonds?
Yes. The SBA Surety Bond Guarantee Program (13 CFR Part 115) guarantees 80% of the surety's loss on payment, performance, bid, and ancillary bonds for contracts up to $9 million ($14 million on federal contracts certified as necessary by the contracting officer, effective March 2024). The surety still charges its normal premium rate; SBA adds a 0.6% contract-price guarantee fee paid by the contractor and a separate fee paid by the surety. Bid bonds carry no SBA fee. For small or emerging contractors who cannot secure bonding through the standard market, the SBA program often makes an otherwise-unbondable payment bond bondable at a small premium surcharge.
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All content is researched from official state and federal sources (.gov) and verified before publication. BuySuretyBonds.com works with Treasury-certified, A-minimum rated surety carriers serving all 50 states.
Your Contract Is Signed. The Bond Needs to Be Filed by Monday.
Miller Act and Little Miller Act obligees will not issue a notice to proceed without the payment bond on file. Our underwriting desk writes directly with Treasury Circular 570 sureties and typically issues the bond form the same business day.
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