Prompt Payment Acts: Federal and State Rules That Force Timely Payment in Construction
A prompt payment act is a statute that imposes specific payment deadlines and interest penalties on construction projects. The underlying policy is straightforward: construction work can't get done if subs and suppliers are financing the customer's working capital indefinitely, so statutes require timely payment and penalize late payment with automatic interest.
The Federal Prompt Payment Act applies to contracts with the federal government. Every US state has its own prompt payment act covering state and local public work, and most states have prompt payment provisions for private construction too. The patchwork creates specific rules for specific project types, and understanding which apply to a given project is essential for both sides of the payment relationship.
The federal Prompt Payment Act (31 U.S.C. §3901-§3907) applies to federal government contracts. It establishes specific deadlines for the government to pay prime contractors on construction work, and separately requires prime contractors to pay subs within specific windows after receiving their own payment from the government.
Federal Prompt Payment Act key rules for construction
- Government payment to prime contractor — typically within 14 days after receipt of a proper invoice, with 7 days to object if improper
- Prime contractor payment to sub — within 7 days after receipt of government payment to the prime
- Interest automatic — runs from the required payment date at the Treasury-published rate (indexed semi-annually)
- No waiver — right to interest cannot be waived in the contract
- Applies to construction, services, and commercial items contracts with the government
Every US state has a prompt payment act covering state and local public construction projects. The structures are broadly similar to the federal act but with state-specific deadlines, interest rates, and enforcement mechanisms.
Typical state prompt payment rules for public work
- Owner-to-contractor payment deadline — commonly 30 days after receipt of a proper pay application
- Contractor-to-sub payment deadline — commonly 7-15 days after contractor receives payment from owner
- Interest rate on late payments — varies from statutory rate (often 1-2% per month) to prime-plus-some-percent
- Dispute mechanism — defined procedure for the paying party to object to all or part of a payment
- Right to stop work — in some states, the contractor can suspend performance after payment is sufficiently late
Private construction prompt payment provisions vary more than public work provisions across states. Some states have no private-work prompt payment statute. Others have comprehensive private-work statutes that parallel the public framework. Still others have narrow provisions that apply only to specific payment situations (e.g., retainage release).
State approaches to private construction prompt payment
- Comprehensive coverage — states with prompt payment statutes that cover private work broadly (California, Maryland, New Jersey, many others)
- Retainage-specific — states where prompt payment applies specifically to retainage release, not progress payments (varies)
- No statutory framework — states where private payment is governed solely by the contract, with common-law remedies for breach
- Industry-specific — specialty provisions for specific trades or project types
On multi-state work, the prompt payment analysis is per-project-state, not per-company-domicile. A contractor headquartered in Texas working in California on a private commercial project gets California's private-work prompt payment rules — not Texas's. The state where the project is located governs.
Prompt payment clocks typically start running when the paying party receives a 'proper' invoice or pay application. 'Proper' is a defined term — the document has to be properly prepared, include required supporting documentation (lien waivers, COI verification, etc.), and be submitted through the required channel.
The paying party typically has a short window to object to an improper invoice (often 7-14 days). If they don't object, the invoice is deemed proper and the payment clock starts. If they do object, they must identify specific deficiencies, and the clock restarts when the deficiencies are cured. This structure prevents both sides from gaming the system — paying parties can't delay indefinitely by claiming invoices are improper, and submitting parties can't claim the clock started before submitting a genuinely complete invoice.
Retainage is often subject to its own prompt payment timeline, different from progress payments. Many state statutes require retainage release within a specific window after substantial completion (often 30-60 days) and impose interest on late retainage release at the same rate as progress payment interest.
The mechanical application is important. On a $10M project with 10% retainage, substantial completion triggers the retainage release clock. If the state requires release within 30 days and the owner holds the $1M retainage for 90 days, the interest accrual (at, say, 1.5% per month) is $22,500 — on top of the retainage itself. This interest is usually automatic under the statute, not requiring a separate claim or demand.
Interest rates under prompt payment acts vary. The federal act uses the Treasury-published rate for overdue federal payments, which historically has run 3-6% annually depending on the rate environment. State acts vary more: some use prime-plus-some-percent (which floats with market rates), some specify fixed percentages (often 1-1.5% per month), some mirror the state's legal interest rate.
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The statutory interest rate may or may not be higher than the paying party's cost of capital. When it's higher, prompt payment acts effectively price the cost of delay — the paying party pays more to stretch payment than they would pay in interest on a bank line of credit. When it's lower, the economic pressure is weaker, though the statutory framework still applies.
When a prompt payment act is violated, the remedies vary but typically include automatic interest, attorney's fees (in some states), and in some cases additional penalties. The paying party who violates the statute is usually on the hook for the unpaid principal, accumulated interest, and the legal fees required to enforce — which makes prompt payment violations more expensive than their face value suggests.
Enforcement is typically through civil action — the unpaid party files suit, the court determines whether the statute applies and whether a violation occurred, and the court enters a judgment for the amounts owed plus interest plus (where applicable) attorney's fees. Mechanic's lien and bond claim rights often operate in parallel, giving the unpaid party multiple collection mechanisms.
Frequent prompt payment disputes
- Whether the invoice was 'proper' — payer claims the invoice was incomplete, starting a back-and-forth about when the clock started
- Good-faith dispute exception — payer claims a bona fide dispute exists, which in many statutes allows withholding of the disputed portion (but not the undisputed portion)
- Retainage release timing — disagreement about when substantial completion occurred, affecting when the retainage clock started
- Change order payment — disagreement about whether change order amounts are included in the prompt payment framework
- Pass-through timing — whether the sub's clock runs from the GC's receipt from the owner or from submission of the sub's pay app
Most prompt payment acts include good-faith dispute exceptions — if the paying party has a legitimate dispute about all or part of a payment, they can withhold the disputed portion without triggering interest, provided they notify the other side of the dispute and its basis within a specified window.
The key operational implication: the undisputed portion of an invoice still has to be paid on time. An owner who disputes $50,000 of a $500,000 pay application can withhold the $50,000 subject to the dispute but must still pay the $450,000 undisputed portion within the statutory window. Withholding the entire amount because some of it is disputed is itself a prompt payment violation.
For subs and suppliers facing slow payment, prompt payment acts are a leverage tool. A demand letter citing the specific statute, the required payment date, and the accruing interest sharpens the collection conversation. Many owners and GCs pay promptly when reminded of the statutory obligation — the issue becomes less about cash flow and more about compliance with law.
For owners and GCs, prompt payment acts are a discipline. Designing internal pay-app review processes to meet statutory deadlines, tracking receipt dates on incoming invoices, and documenting any disputes formally — these are the operational habits that keep prompt payment acts from becoming the company's problem.
Prompt payment acts are the statutory framework that backs up contractual payment terms with real enforcement mechanisms — automatic interest, often attorney's fees, and in some cases penalties for violation. Federal contracts follow the federal act; public state and local work follows state acts; private work follows state-specific rules that range from comprehensive to nonexistent. Understanding which rules apply to a given project is essential for both the paying side (to stay compliant) and the paid side (to know when leverage is available to enforce).
Written by
Jordan Patel
Compliance & Legal
Former corporate counsel specializing in construction contracts and tax compliance. Writes about the documentation layer — COIs, W-8/W-9, certified payroll, notice-to-owner deadlines — and the legal backbone behind audit-ready AP.
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