Billing and cash flow

How to collect late payments from construction clients

Confirm the invoice was proper and received, find out why it is late, then escalate on a fixed schedule: calls, a written demand that cites the contract and prompt payment law, and finally lien, bond, or legal remedies before their deadlines expire.

An office manager and contractor review invoices with a calculator and laptop in a construction office.
Review invoices, committed costs, and cash timing together before making project decisions. AI-generated illustration.

To collect a late construction payment, work a fixed escalation ladder and keep your legal deadlines running underneath it. Start by confirming the invoice was complete and actually received, then call the person who approves payment to learn the real reason. If that does not work, send a written demand that cites the contract terms and any prompt payment interest. If the money still does not come, use the remedies construction gives you that other businesses do not have: mechanics lien rights on private work, payment bond claims on public work, and in some cases the right to suspend work. Those remedies run on deadlines, so the calendar matters more than the tone.

First, find out why the payment is late

Late payments in construction usually fall into one of five buckets, and each has a different fix.

Common reasons for late payment and the fix
ReasonWhat it looks likeFix
PaperworkMissing waiver, wrong PO, unapproved change orderFix and resubmit the same day
Approval stuckPM or architect has not signed offAsk what is open; offer a walk
Upstream nonpaymentGC says the owner has not paidRead the payment clause and state law
DisputeClient questions quality, quantity, or priceSeparate disputed from undisputed amounts
Cash troubleVague answers, partial payments, new excusesMove fast on lien or bond deadlines

Step by step: the collection ladder

Step 1: Confirm it was a proper invoice (day 1 past due)

Check that the invoice matched the contract and had every required attachment, and confirm receipt. On federal work this matters legally: under FAR 52.232-27, progress payments are due 14 days after the billing office receives a proper payment request, and a defective invoice must be returned within 7 days with the reasons. If you never got a rejection, the clock was running. See how to write a construction invoice that gets paid.

Step 2: Call the approver, not just AP (days 1 to 7)

Accounts payable pays what is approved. Call the PM or owner's rep and ask a direct question: "Is anything holding this invoice?" Write down the answer and the date, and confirm it by email.

Step 3: Written reminder with the math (days 7 to 15)

Send a short email with the invoice number, amount, due date, days past due, and a copy of the invoice and backup. Ask for a payment date. Keep it factual. You still have to build the rest of the job with these people.

Step 4: Formal demand letter (days 15 to 30)

Put it on letterhead, addressed to whoever signs checks. Cite the contract payment clause, the amount, and the statute that applies. Some states add interest or penalties on late construction payments. In California, for example, Civil Code section 8800 requires a private owner to pay an undisputed progress payment within 30 days after a demand under the contract (unless otherwise agreed in writing), sets a penalty of 2 percent per month on amounts wrongfully withheld, and gives the prevailing party attorney's fees. On federal prime contracts, FAR 52.232-27 makes interest on late payment automatic, using the rate the Treasury publishes. Check your state on the prompt payment and retainage laws by state pages.

Step 5: Use lien or bond rights before the deadline (in parallel)

Do not wait for step 4 to fail before checking these. On private work, mechanics lien deadlines run from your last work or from completion, and some states require a preliminary notice early in the job to preserve the right. On federal work, the Miller Act gives unpaid subs and suppliers a claim on the prime's payment bond. A supplier or sub who contracted with a subcontractor (not the prime) must give written notice to the prime within 90 days after its last labor or material, and suit must be filed within one year after that last work, under 40 U.S.C. 3133. See when to file a mechanics lien and the mechanics lien law by state pages.

Step 6: Suspend work or file suit (with counsel)

Some contracts and some state laws allow a contractor to stop work for nonpayment after written notice. Do this only after reading the contract and talking to a construction attorney, because stopping without the right can make you the party in breach.

Worked example: an HVAC sub owed $86,000

Here is an illustration. An HVAC sub on a private office building is owed $86,000 on its month five pay app, now 40 days past the subcontract's payment date. The GC says the owner is slow.

  1. Day 1: The sub's office manager confirms the pay app was accepted in the GC's portal, with conditional waiver attached.
  2. Day 3: The PM says the owner disputed $14,000 for a duct reroute. The other $72,000 is undisputed.
  3. Day 5: The sub emails, asking the GC to pay the undisputed $72,000 now and sending the field directive that ordered the reroute.
  4. Day 12: No payment. A demand letter goes to the GC's controller citing the subcontract payment clause and the state prompt payment statute, with interest.
  5. Day 14: The sub's office checks the lien deadline. Preliminary notice was served at the start of the job, and the lien recording window is still open, so the date goes on the calendar with a 30-day buffer.
  6. Day 19: $72,000 arrives. The sub sends an unconditional waiver for that amount only, and keeps working the $14,000 as a change order dispute.

The key moves: separating disputed from undisputed money, putting it in writing, and protecting the lien deadline instead of hoping.

Collecting from homeowners

Residential collections need a softer opening and the same discipline. Homeowners often stall because they are unhappy with something they have not said out loud. Ask in person what is bothering them, write down the list, fix what is fair, and ask for the undisputed payment in the same conversation. Lien rules on owner-occupied homes can differ from commercial work, so check your state before you count on that remedy.

Mistakes to avoid

  • Signing an unconditional waiver to "show good faith" before money arrives.
  • Letting a lien or bond deadline pass during friendly negotiations.
  • Letting the whole invoice sit because of a small disputed item.
  • Threatening a lien you have no right to file, or inflating the amount. It wrecks your credibility and can create legal exposure, so check the state rules first.
  • Keeping no written record of who said what, and when.

Prevent the next one

Most collections problems are cheaper to prevent. Negotiate payment terms before signing (construction payment terms contractors should negotiate), send preliminary notices on every job where they apply, and track every receivable by due date. Smart Business Automator tracks invoice due dates, retainage, and lien waiver status per job and sends follow-up reminders on a schedule, through construction accounts receivable automation.

Frequently asked questions

Can I charge interest on a late construction payment?

If the contract allows it or a prompt payment statute applies, yes. Some states set interest or penalties on late construction payments, and federal prime contracts pay interest automatically under FAR 52.232-27. Check the law for your state and job type.

How long do I have to file a lien for nonpayment?

It depends on the state and your role, and the deadline is usually counted from your last work or from completion of the project. Some states also require an early preliminary notice. Check the state page and calendar the date early.

What if the GC says they have not been paid by the owner?

Read your subcontract's payment clause and your state's law. Some states do not enforce pay-if-paid clauses, and many courts read pay-when-paid clauses as timing provisions only. On federal jobs the prime must pay subs within 7 days of receiving payment.

Should I stop work if I am not being paid?

Only if your contract or state law gives you that right and you follow the notice steps. Stopping without the right can put you in breach. Get legal advice first.

Sources

  1. Acquisition.gov: FAR 52.232-27, Prompt Payment for Construction Contracts
  2. California Civil Code section 8800, private progress payments (public.law)
  3. Cornell LII: 40 U.S.C. 3133, Miller Act rights of persons furnishing labor or material
  4. Cornell LII: 31 U.S.C. 3905, Payment provisions relating to construction contracts
  5. Bureau of the Fiscal Service: Prompt Payment interest rates
Written and edited by

Maurice Francois writes and edits construction operations guides for Smart Business Automator. More from Maurice on the Scaling Legends podcast.

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