Federal Contractors: Enforce 14, 30, and 7 Day Prompt Payment Rules

Federal law requires progress payments within 14 days and final payments within 30 days of a proper invoice, and prime contractors must pay subcontractors within 7 days of receiving payment from the government. These deadlines come from 31 U.S.C. Chapter 39 and FAR 52.232-27. Your first move: submit a complete, “proper” invoice and keep documented proof of government acceptance, because that paperwork is what starts, and protects, your interest clock.

TL;DR:

• Proper invoices must include specific details such as contract number, invoice date, description of work, and banking information; missing elements can delay payment.
• Payments for accepted work are due 14 days after receipt of a proper invoice, with final payments due within 30 days or after government acceptance, whichever is later.
• Interest on late payments is automatically owed based on the Treasury rate, with the formula P times r over 360 times the number of days late.
• Subcontractors must be paid within 7 days of the prime contractor receiving federal payment, unless disputes or documentation issues justify delays.
• Contractors should track and document invoice submission, acceptance, and payments to ensure prompt collection and facilitate escalation if delays occur.

Table of Contents

• What the Prompt Payment Act Construction Rules Actually Cover
• Key FAR Clauses That Set Your Payment Deadlines
• Subcontractor Pay Rules: What Primes Owe and When
• Calculating Interest on Late Federal Construction Payments
• State Prompt Payment Laws vs. Federal Rules
• Enforcement Routes When a Federal Payment Runs Late
• Building a Payment Compliance Checklist That Actually Works
• How Federal-rconstructionsolutions Helps Contractors Stay Ahead of Payment Delays
• What Federal Contracting Taught Me About Getting Paid On Time
• Get Ahead of Payment Problems Before They Start
• Where to Verify Prompt Payment Rules Yourself
• Sources
• FAQ

What the Prompt Payment Act Construction Rules Actually Cover

The Prompt Payment Act sits in 31 U.S.C. Chapter 39, and it does one job: it forces federal agencies to pay their bills on time or pay interest for being late. Congress wrote it as a statutory baseline. The Federal Acquisition Regulation then translates that baseline into contract language every construction contractor actually reads, mainly through FAR 52.232-27 and FAR 32.904.

Three definitions determine whether you get paid on schedule, and most payment disputes trace back to a contractor misunderstanding one of them.

A proper invoice is not just any bill. It has to include specific elements: your contract number, invoice date, a description of the work or supplies delivered, shipping and payment terms, and the name, address, and banking details needed to send the money. Miss one required field, and the agency can bounce the whole invoice back to you rather than pay it.

The designated billing office is whatever office the contract names to receive invoices. This matters because the payment clock starts when that specific office receives your proper invoice, not when your project manager emails a PDF to the contracting officer. Send it to the wrong office and you may have effectively sent nothing.

Constructive acceptance is a fallback rule. If the government doesn’t formally inspect and accept your work within a set window (7 days by default under FAR 32.904), the law treats it as accepted anyway for purposes of calculating interest. That protects you from an agency that simply stalls the inspection to avoid triggering payment obligations.

One more distinction trips up a lot of contractors: invoice payments versus contract financing. Invoice payments are what you get for completed, accepted work. Contract financing includes advance payments, progress payments based on percentage of completion under certain contract types, and other funding mechanisms that aren’t tied to accepted deliverables. The Act’s due-date rules apply differently to financing payments, and treating a financing payment like an invoice payment (or the reverse) is a common source of confusion in construction accounting.

Here’s what falls under Prompt Payment Act coverage:

• Payments for accepted construction work under standard fixed-price or cost-reimbursement contracts
• Progress payments tied to completed, inspected phases of work
• Final payments upon contract completion and acceptance
• Interest penalties automatically owed when the government misses a due date

Contract financing arrangements, disputed amounts under active dispute resolution, and payments explicitly excluded by contract terms generally sit outside the standard due-date and interest framework, which is exactly why reading your specific contract clauses matters as much as knowing the statute.

Key FAR Clauses That Set Your Payment Deadlines

FAR 52.232-27, titled “Prompt Payment for Construction Contracts,” is the clause that actually governs your day-to-day payment timing. If your contract includes it, and nearly every federal construction contract does, you have specific, enforceable numbers to hold the agency to.

Here’s how the clock works under that clause:

1. Progress payments are due 14 days after the designated billing office receives your proper payment request, according to FAR 52.232-27.
2. Final payments are due 30 days after the office receives your proper invoice, or 30 days after government acceptance, whichever is later.
3. Defective invoice returns must happen within 7 days. If your invoice is missing required elements, the government has to notify you within that window and specify exactly what’s wrong. If they sit on it past 7 days without telling you, the delay generally doesn’t reset your payment clock in their favor.
4. Interest penalties apply automatically once a payment is late. You typically don’t have to file a claim or demand letter to trigger it. The interest accrues under the rate the Treasury Department publishes, and agencies are supposed to add it to your payment without you asking.
5. Subcontractor pass-through kicks in within 7 days of the prime contractor receiving payment from the government, a requirement built into the same clause.

FAR 32.904 does different but related work. It tells contracting officers how to determine payment due dates and, importantly, gives them discretion to set a longer acceptance period than the standard 7 days when the contract file documents a valid reason. A large water treatment facility with a complex, multi-stage inspection process might justify a 14 or 21-day acceptance window written directly into the solicitation.

That discretion cuts both ways. It can work in the government’s favor by extending the clock, but it also means the standard timelines aren’t automatically what you’re entitled to. You have to check.

Pro Tip: Before you submit a bid, search the solicitation for the phrase “acceptance period” or any language modifying the standard 7-day constructive acceptance rule. Contracting officers sometimes bury an extended acceptance window in a technical exhibit rather than the main body of the contract, and missing it means you’ll misjudge when your interest clock actually starts.

FAR 32.904 also clarifies that constructive acceptance doesn’t apply automatically when there’s a genuine dispute over quantity, quality, or contract compliance. If the government’s inspector flags a real defect, the acceptance clock can pause, and that’s a legitimate exception, not a stalling tactic, as long as the dispute is documented and specific.

Watch for contract-specific modifications, too. Some construction contracts, particularly those with unusual funding sources or joint federal-state financing, include tailored payment clauses that shorten or lengthen the standard windows. Read Section H (Special Contract Requirements) and any attached payment schedules before you assume the boilerplate FAR numbers apply unmodified.

Subcontractor Pay Rules: What Primes Owe and When

If you’re a subcontractor on a federal construction project, the Prompt Payment Act’s protection for you flows through the prime contractor, not directly from the government. FAR 52.232-27 requires the prime to pay each subcontractor within 7 days of receiving payment from the contracting agency for that subcontractor’s work.

This flow-down obligation isn’t optional language the prime can quietly waive. It’s a mandatory clause the prime is contractually required to build into its subcontract agreements. If a prime’s subcontract doesn’t include equivalent prompt-payment terms, that’s a compliance gap worth flagging before you sign, not after work starts.

Several situations legitimately interrupt the 7-day pass-through, and knowing the difference between a legitimate delay and a stall protects you:

• A genuine, documented dispute over the quality or completeness of your work
• The subcontractor’s own invoice being defective or missing required documentation
• Retainage withheld under terms specified in the subcontract, which is treated separately from the standard payment timeline
• Contract financing payments to the prime that haven’t yet converted into an accepted invoice payment triggering pass-through

What the Act does not excuse is a prime simply sitting on your payment because their own cash flow is tight, or because they’re using your invoice as leverage in an unrelated dispute. That’s precisely the kind of practice the pass-through clause exists to prevent.

If a prime misses the 7-day window, document three things immediately: the date the prime received payment from the government (you can often confirm this through your own project correspondence or a records request), the date you submitted your invoice to the prime, and any written communication about the delay. Those three data points are what you’ll need to calculate owed interest and, if it comes to that, support a formal demand.

GAO’s oversight work on this topic makes a point worth internalizing: enforcement of subcontractor pass-through tends to be complaint-driven. Agencies don’t typically audit every prime’s payment records to lower-tier subs unless someone raises the issue. That puts the burden on you to track your own payment timeline and escalate when it slips, which is exactly why a guide to government subcontracting compliance is worth keeping on hand before problems start, not after.

Calculating Interest on Late Federal Construction Payments

The government owes you interest automatically once a payment misses its due date, and the formula is simple daily interest: P × (r/360) × d.

In that formula, P is the principal amount owed, r is the applicable Prompt Payment interest rate expressed as a decimal, and d is the number of days the payment is late. The Treasury’s Bureau of the Fiscal Service publishes the current rate and updates it periodically, and as of July 2026 the published Prompt Payment interest rate is 4.75%.

Here’s how that plays out on an actual invoice:

That $50,000 invoice, paid 10 days late, generates roughly $659.72 in interest the agency owes you on top of the principal. It’s not a fortune on a single invoice, but on a project with dozens of progress payments over 18 months, chronic 10 to 15-day delays add up to real money you’re entitled to and that most contractors never bother to claim.

The Fiscal Service’s own calculator walks through this exact formula and flags when you need the monthly compounding version instead of simple daily interest, which typically applies only in narrower circumstances involving extended late payment periods. For most construction progress and final payments, the simple daily formula above is what you’ll use.

State Prompt Payment Laws vs. Federal Rules

Federal rules under the Prompt Payment Act apply specifically to contracts where a federal agency is the paying party. The moment you’re working a state-funded public project, a municipal contract, or a private commercial job, a different set of rules governs, and those rules vary considerably by state.

Some states track the federal model closely. Others diverge in ways that catch contractors off guard, especially those used to federal timelines who assume the same numbers apply everywhere.

• North Carolina sets its own statutory interest requirements on final payments to prime contractors and pass-through obligations to subcontractors under G.S. 143-134.1, with terms distinct from the federal 30-day final payment rule.
• Florida has its own prompt payment statute governing public construction contracts, with separate timelines for local government versus state agency projects.
• Texas applies prompt payment requirements to state and local public works that differ in structure from the federal FAR-based framework.
• Arizona maintains statutory payment timelines for public construction that contractors need to verify against the specific awarding agency’s contract terms.

The practical rule is straightforward even when the statutes aren’t: confirm which law governs before you assume anything. Your contract’s “Governing Law” or “Disputes” clause usually names it explicitly. If you’re working a hybrid project (federal funding flowing through a state agency, for instance), the more specific and more restrictive rule the contract actually cites typically controls, and that’s worth confirming with whoever drafted your contract rather than guessing. A comparison of private versus public construction contract norms is useful groundwork if you’re bidding across both federal and state-funded work in the same fiscal year.

Enforcement Routes When a Federal Payment Runs Late

Your first move when a payment is late isn’t a lawsuit. It’s a phone call, followed immediately by a written record.

1. Contact the designated billing office first. Confirm they received your proper invoice and ask directly why payment hasn’t processed. Get the response in writing, even if it’s just a follow-up email summarizing the call.
2. Escalate to the contracting officer if the billing office can’t resolve it within a few days. The contracting officer has authority over the contract and can direct payment processing or explain a legitimate hold, such as a documented quality dispute.
3. Confirm whether interest is accruing automatically. Under FAR 52.232-27, it generally should be without you filing anything. If a payment finally arrives without interest included, submit a written request for the interest owed, citing the specific due date and days late.
4. File a formal claim under the Contract Disputes Act if administrative contact doesn’t resolve the issue and the amount owed is significant. This is a more structured process with its own procedural requirements.
5. Consider litigation only after weighing cost against recovery. Legal action makes sense for large, well-documented amounts. For a few hundred dollars in interest on a single invoice, the administrative route is almost always the better use of your time.

GAO’s reviews of Prompt Payment Act enforcement point to something contractors should internalize early: oversight tends to be complaint-driven rather than proactive. Agency inspectors general and GAO investigators generally get involved when someone files a complaint, not through routine audits of every contract’s payment history. That means the enforcement mechanism exists, but it doesn’t activate itself.

Pro Tip: Keep a simple spreadsheet logging every invoice submission date, the billing office confirmation, the due date, actual payment date, and any interest received. When you eventually need to escalate a dispute, that log is the difference between a fast resolution and a drawn-out argument about what happened when.

Litigation is rarely the right first step for a single late payment, but a documented pattern across multiple contracts with the same agency can shift that calculation. If you’re seeing chronic delays project after project, that pattern itself becomes evidence worth raising with agency leadership or, in persistent cases, your contracting officer’s supervisor.

Building a Payment Compliance Checklist That Actually Works

Most late-payment disputes trace back to something preventable on the contractor’s side: an incomplete invoice, missing acceptance documentation, or nobody on the team actually tracking due dates. Here’s a workflow that closes those gaps.

1. Build your invoice against the proper-invoice checklist every time. Contract number, invoice date, description of work performed, quantities, unit prices, shipping terms if applicable, and complete payment routing information. Treat this as a template, not a memory exercise.
2. Capture acceptance evidence the day it happens. Inspector reports, signed delivery tickets, punch list sign-offs, and certified payroll records where Davis-Bacon applies all serve as proof of the date your acceptance clock started.
3. Name one person as the billing owner. Not a shared inbox, not “whoever has time.” A single person tracking every invoice from submission to payment catches missed deadlines before they become disputes.
4. Set a communication checkpoint schedule. Day 0 (submit invoice), day 7 (confirm receipt at billing office if no acknowledgment), day 14 (progress payment due date, confirm payment or reason for delay), day 30 (final payment due date), day 45 (formal escalation to contracting officer if unresolved).
5. Calculate and document interest owed the moment a payment is late, using the P × r/360 × d formula against the current Treasury rate, so you have the figure ready whether the agency adds it automatically or you need to request it.

Pro Tip: Store your acceptance evidence and invoice records in a shared project folder rather than scattered across individual inboxes. When a payment dispute drags past 30 days, being able to produce a complete, timestamped record in five minutes rather than two days changes how seriously the other side treats your claim.

A tool built for construction task tracking, like the project controls approach outlined by Buildberry, can help formalize this kind of documentation trail so acceptance dates and invoice statuses don’t live only in someone’s memory. The mechanics matter less than the discipline: a checklist followed inconsistently protects nobody. Federal-rconstructionsolutions built its own compliance checklist resource around this exact principle, because the contractors who get paid on time are usually the ones who treat invoicing as a repeatable process, not a one-off task.

How Federal-rconstructionsolutions Helps Contractors Stay Ahead of Payment Delays

Payment delays often start earlier than the invoice, in a proposal that skipped over compliance requirements the contracting officer expects to see. Federal-rconstructionsolutions works with construction companies on RFP writing and submission, compliance support, and SAM.gov registration specifically so those foundational gaps don’t surface later as payment disputes.

The approach centers on pre-bid compliance review, invoice quality checks before submission, and direct coordination with contracting officer expectations, the same practices this article recommends for protecting your interest clock. Contractors preparing federal construction bids can review the step-by-step guide to winning federal construction contracts for the groundwork that makes clean, on-time invoicing possible from day one.

What Federal Contracting Taught Me About Getting Paid On Time

Contractors treat payment delays as a legal problem, and technically they are. But the ones who get paid consistently on time treat it as an operations problem first. They fix the invoice before it’s late, not after.

The pattern I see repeatedly: companies that assign one person to own billing end to end, from invoice draft to payment confirmation, get paid faster than companies where three people touch an invoice and nobody owns the follow-up. It’s not about legal leverage. It’s about somebody actually checking, on day 7, whether the billing office confirmed receipt.

Here’s the one change worth making this week. Pick one person, today, to own every open invoice on your current federal contracts, and have them build a simple tracking sheet with submission dates, due dates, and confirmation status. That single habit catches more late payments before they become disputes than any amount of knowing your legal rights after the fact.

— Rowena

Get Ahead of Payment Problems Before They Start

There are alternatives to figuring out FAR compliance and invoice requirements on your own, one missed deadline at a time. Instead of learning proper-invoice rules through a returned payment request, contractors can work directly with a team that builds compliance into the bid before submission, catching the gaps that turn into 30-day payment disputes months later.

The service lineup runs from RFP writing and compliance support through SAM.gov registration and renewal help, covering the exact groundwork that determines whether your invoices get flagged as defective or processed on schedule. For contractors weighing private-sector work alongside federal contracts, private sector guidance and project strategies extend the same compliance discipline to non-federal clients.

If chasing payment timelines is eating into time you’d rather spend running projects, schedule a compliance review through the DOT-GOV service page and find out where your current invoicing process has gaps before your next payment request does.

Where to Verify Prompt Payment Rules Yourself

• FAR 52.232-27: full regulatory text on progress payment, final payment, and defective invoice timelines for construction contracts.
• FAR 32.904: rules on determining payment due dates and constructive acceptance.
• 31 U.S.C. Chapter 39: the statutory foundation for prompt payment requirements.
• Bureau of the Fiscal Service Prompt Payment page: current interest rates and the official calculator for computing owed interest.
• GAO reports: enforcement findings and oversight observations on how well agencies comply with prompt payment obligations.

Use the Fiscal Service page whenever you need to calculate interest on a specific late payment. Use the FAR and U.S. Code links when you need to quote exact regulatory or statutory language in a dispute or demand letter.

This article is general information, not a substitute for advice from a qualified lawyer. Consult a qualified legal professional about your own circumstances before acting on anything here.

Sources

• Acquisition
• Acquisition
• Interest Rates | Bureau of the Fiscal Service
• 31 USC Ch. 39: PROMPT PAYMENT

FAQ

What is the federal Prompt Payment Act?

The Prompt Payment Act is a federal law under 31 U.S.C. Chapter 39 requiring federal agencies to pay contractors on specific timelines or owe automatic interest for late payments. For construction contracts, FAR 52.232-27 sets progress payments due in 14 days and final payments due in 30 days.

Does the Prompt Payment Act apply to subcontractors?

Yes, through a pass-through requirement rather than direct government payment. Prime contractors must pay subcontractors within 7 days of receiving payment from the federal agency for that subcontractor’s completed work, as required under FAR 52.232-27.

What can I do if a federal agency or prime refuses to pay?

Start by contacting the designated billing office to confirm invoice receipt, then escalate to the contracting officer if the delay continues. If administrative contact doesn’t resolve it, you can file a formal claim under the Contract Disputes Act, and Federal-rconstructionsolutions’s compliance support services can help contractors build the documentation needed to support that claim.

How long does a federal agency legally have to pay a contractor?

Progress payments are due 14 days after the billing office receives a proper invoice, and final payments are due 30 days after receipt or government acceptance, whichever is later, under FAR 52.232-27. Defective invoices must be returned to the contractor within 7 days so the clock doesn’t run against an invoice the government hasn’t actually accepted as complete.

How is prompt payment interest calculated?

The formula is P × (r/360) × d, where P is the amount owed, r is the current Treasury interest rate, and d is the number of days the payment is late. The Bureau of the Fiscal Service publishes the current rate, which stood at 4.75% as of July 2026, along with an official calculator for computing exact amounts owed.

Recommended

• 30 Day Claim Deadline: Federal Change Order Playbook for Contractors
• Federal Procurement Compliance Checklist for Contractors
• Government Subcontracting: A Compliance Guide for Contractors
• Avoiding Compliance Violations in Government Contracts

Working in the public sector? One short email a week — prevailing wage, certified payroll, bid protests, agency procurement rules. Free, no pitch. Subscribe.

Free and unconditional. No call required, no obligation, unsubscribe anytime.