A profitable construction company can still run out of cash when payroll, suppliers and subcontractors are due before a client’s invoice is approved and paid. The fix is a sequence, not a single loan: map the timing gap, remove preventable billing delays, coordinate project spending with receipts, pursue overdue amounts with records, and only then price financing against the remaining shortfall.
Start with a project-level cash forecast
Profit is measured when revenue and costs are recognized; cash flow is measured when money actually leaves or enters your bank account. A job can show a positive margin while its cash balance falls because labor and materials are paid weekly, progress claims are approved later, retainage is withheld, or a change order is still unresolved.
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Build a rolling forecast that shows the date and amount of each expected receipt and payment. RICS identifies cash-flow forecasting as a way to assess site progress and other issues; use that discipline at both project and company level. The sources do not prescribe one universal horizon, so choose a period long enough to include the next payroll cycles, supplier commitments and realistic client-payment dates, then update it at least weekly while a gap is open.
Include the items that create timing surprises
- Client receipts, split by current progress invoices, approved-but-unpaid change orders, and retainage.
- The date an invoice is expected to be accepted, not merely the date it is sent, followed by the realistic payment date under the contract.
- Payroll, payroll taxes, insurance, subcontractor draws, equipment payments, materials, fuel and site overhead.
- Taxes, debt service, office overhead and other company costs that will fall due while the project is still cash-negative.
- Committed change-order costs, even when the corresponding change order has not yet been approved.
- Opening bank cash, available borrowing capacity and a minimum operating reserve you will not use for a discretionary purchase.
For each project, calculate the lowest projected cash balance and the dates on which it occurs. The size of the gap is the amount needed to keep obligations current; its duration determines whether better billing and supplier terms are enough or whether a short-term facility might be justified. Roll all projects into a company forecast because one job’s surplus can mask another job’s deficit.
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Use realistic receipt dates, not optimistic due dates
Separate four milestones: work performed, invoice submitted, invoice accepted as complete, and cash received. A contract may state a payment period that begins only after a proper invoice, approval or a payment received from an upstream party. Put each condition in the forecast and create a conservative date when the client has a history of taking longer. Label assumptions so a project manager can replace them when the client confirms an approval date.
Keep a separate line for retainage. Retainage is money withheld under a contract or applicable rule until specified conditions are met; it is not simply an ordinary invoice that is late. Record the amount withheld, the release event and the evidence still required.
Make every progress billing easy to approve
Many late payments begin with an incomplete claim rather than a client’s refusal to pay. Before the billing period closes, read the contract’s payment clause and assemble the exact package the payer requires.
Pre-billing checklist
- Confirm the billing window. Note the cutoff date, submission address or portal, required invoice format, and who must receive copies.
- Update the schedule of values or milestone evidence. Quantities, percent complete, stored materials and approved changes should reconcile to the contract and the site record.
- Attach required support. Depending on the contract, that can include daily reports, inspection sign-offs, certified payroll, photographs, test results, lien waivers or other releases. Do not assume a document is optional because a prior invoice was paid without it.
- Reconcile arithmetic and contract references. Check prior payments, tax treatment, retainage, change-order numbers and the current amount due. A small mismatch can put the entire claim into exception review.
- Submit promptly and preserve proof. Save the transmitted invoice, attachments, portal confirmation, delivery receipt and the person who accepted it.
- Calendar the next action. Set reminders for receipt confirmation, expected approval, contractual payment date and escalation if any milestone slips.
Queensland’s building regulator advises keeping schedules and documentation current, invoicing immediately, and chasing late payments. Those practices are broadly useful, but the forms, deadlines and legal consequences in Queensland do not automatically apply to a U.S. project. Follow the governing contract and local law.
Track acceptance and disputes separately
Maintain an invoice register with invoice number, project, gross amount, retainage, submission date, proof of receipt, approval status, dispute reason, promised payment date and actual receipt. An aging report should distinguish “not yet due,” “due,” “disputed,” “approved but unpaid,” and “retainage.” This prevents a disputed extra from making an otherwise valid base claim look entirely uncollectible.
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When a client says an invoice is being reviewed, ask for the specific line item, missing document or responsible approver. A general “accounting is processing it” is not a forecast date. Record every call and email, including the commitment made and the date promised.
Coordinate procurement, labor and supplier terms with receipts
Receivables are only half of cash flow. A project can remain solvent when outflows are scheduled to match the work plan and expected receipts, without breaching contracts or damaging critical relationships.
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Time spending to the work plan
- Order materials when lead time and site readiness require them, rather than paying early simply to close an administrative task.
- Stage deliveries where the contract and supplier allow it, so cash is not tied up in materials that cannot yet be installed.
- Match labor and subcontractor mobilization to approved work fronts and inspection dates. Do not defer an earned subcontractor payment in violation of its agreement.
- Review equipment rentals and idle time weekly; return or resize equipment when the schedule changes and the contract permits it.
- Do not delay a safety-critical purchase, statutory payment or necessary work merely to make a forecast look better.
Negotiate terms without treating suppliers as free credit
Ask suppliers whether net terms, staged invoices or milestone payments are available, and put any agreement in writing. SBA guidance on net-30 accounts also points to deposits, early-payment incentives, immediate invoicing, follow-up and credit-approval practices as cash-management measures. Compare the value of a longer term with the cost of losing an early-payment discount or the risk of a supply interruption. Pay agreed amounts on time; a late-payment problem passed down the chain can remove the very credit you need on the next job.
Control change-order exposure
Track the cost of directed or likely changes as soon as they arise. Send the notice required by the contract, obtain written authorization where required, and forecast the cash outflow even if the price is still under negotiation. Do not finance an unapproved change indefinitely on the assumption that it will be paid. If work must proceed before price agreement, document the instruction, daily cost and reservation of rights and obtain advice on the contract and applicable law.
Use a documented collection sequence for overdue invoices
Collection is more effective when it is a routine process rather than an emotional escalation. Start before the due date, then increase the level of contact while preserving the working relationship and the evidence needed for a claim.
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Suggested sequence
- Before submission: ask the project contact to confirm the billing package, approver and submission channel.
- At submission: send the invoice and all required support, then obtain a portal receipt or written acknowledgment.
- At expected approval: confirm that the claim is complete and ask whether any item is disputed. Resolve missing paperwork immediately.
- At the contractual due date: send a concise statement showing invoice, approved amount, retainage, credits and balance, and request a specific payment date.
- After a missed promise: contact the designated commercial or contract manager, document the reason for delay and set a short follow-up date.
- Formal escalation: use the notice, dispute, suspension, lien, bond or legal procedures available under the contract and governing law. Obtain qualified legal advice before stopping work or asserting a remedy.
Keep a separate file for approved-but-unpaid change orders and retainage. Include the contract clause, approval evidence, correspondence and calculation. That file lets management distinguish a temporary processing delay from a credit or scope dispute.
Know which payment rules actually apply
Payment deadlines and retainage limits are not universal. A private commercial contract, a state-funded project and a covered federal construction contract can have different clauses and remedies. Read the payment and retainage language in the prime contract and every relevant subcontract, then check the law of the project location.
Covered U.S. federal construction contracts
For the specific federal progress-payment context covered by FAR 32.103, retainage decisions are case by case, should not substitute for good contract management, and are limited to 10 percent of the approved estimated amount under the provision. Retained amounts are payable promptly after completion of all contract requirements. This 10 percent figure is a rule limit under the Federal Acquisition Regulation (FAC 2026-01, effective March 13, 2026); it is not a general limit for private projects, other jurisdictions or every federal payment arrangement.
FAR 52.232-27 contains prompt-payment requirements for covered federal construction contracts, including provisions tied to proper invoice receipt and release of retained payment. The applicable clause, invoice completeness, approval and contract context determine the actual timing. Do not convert it into a blanket 30-day promise for every construction client.
Private and non-U.S. projects
For private work, use the signed contract, incorporated payment schedule, retainage clause and applicable state or local law. The available guidance does not establish a universal deadline, retainage percentage or remedy for those projects. If an upstream payer’s nonpayment affects a subcontract, have counsel review pay-if-paid or pay-when-paid language, notice requirements and any lien or bond deadline before relying on an assumption.
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Choose financing only after defining the remaining gap
Borrowing can keep payroll and suppliers current, but it also creates a repayment obligation while the client is still late. Apply for financing only after the forecast shows the amount, start date, end date and likely repayment source of the gap. Fixing an incomplete invoice is usually cheaper than financing the delay it caused.
Invoice financing
SBA describes invoice financing as an advance against unpaid invoices while the business continues to manage its sales ledger and collections. Confirm which invoices are eligible, the advance percentage, fees, interest calculation, reserve, recourse if the customer does not pay, and when the advance must be repaid. A disputed, incomplete or otherwise ineligible invoice should not be treated as dependable collateral.
Factoring
Factoring is different: the business sells invoices, and the customer pays the factor. SBA’s financing guidance describes the factor paying the remaining balance, less fees, after collection. Ask whether the arrangement is recourse or non-recourse in the circumstances that matter, how customers will be notified, who handles disputes, and what happens if an invoice is paid late or offset. Customer notification can affect a client relationship, so discuss the process with the contract owner before signing.
Revolving line of credit
A revolving line provides access up to a limit and can be drawn only when the forecast requires it. Compare the borrowing-base formula, reporting frequency, minimum utilization, interest on drawn funds, unused-line fees, collateral, personal guarantees, covenants and renewal rights. A line that can be cancelled or reduced when your backlog weakens may not cover a long project delay.
Contract and SBA-backed working-capital facilities
SBA lender resources describe CAPLine structures and the Working Capital Pilot as possible support for eligible contract costs or receivables. Program caps, eligibility, fees and availability can change; verify current terms on the SBA page and with a participating lender. Approval is not automatic, and a lender’s underwriting may require financial statements, aging reports, contracts, backlog, tax records, collateral or personal guarantees.
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Compare offers by total risk, not headline rate
Alternative lenders may charge higher rates than banks, according to SBA working-capital guidance. A lower stated rate can still be more expensive if the advance is small, fees are charged every draw, or repayment is due before the client is likely to pay.
| Term to compare | Questions to ask |
|---|---|
| Total cost | What are interest, discount, origination, wire, monitoring, unused-line and termination fees over the forecasted borrowing period? |
| Advance and reserve | What percentage of each invoice is advanced, and when is the reserve released? |
| Recourse | Who bears the loss if the customer disputes, offsets or never pays? |
| Collateral and guarantees | Are receivables, equipment, real estate or personal assets pledged? What covenants apply? |
| Collection mechanics | Does the business collect, or must the customer pay the factor or a controlled account? Is notification required? |
| Borrowing base | How often must aging and eligibility reports be delivered, and can the lender exclude a customer or invoice? |
| Repayment timing | Is repayment due when the invoice is paid, on a fixed date, or on demand? Does that date precede the forecast receipt? |
| Flexibility | What are draw conditions, renewal, termination, minimum volume and early-repayment rules? |
Model the offer against a late-payment scenario, not only the expected case. If the client pays another 30 or 60 days late, calculate the additional fees, interest and collateral pressure. Reject or renegotiate a facility that turns a temporary timing problem into a default risk.
Build controls that prevent the next cash squeeze
Assign ownership
Name one person responsible for each invoice from draft through payment. The project manager confirms percent complete and supporting records; the commercial or accounting lead checks contract compliance; an owner or controller reviews aging, disputes and escalation. A handoff with no named owner is a predictable source of missed billing windows.
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Review a small set of leading indicators
- Days from work completion to invoice submission.
- Days from submission to acceptance.
- Amount billed but not yet approved.
- Approved-but-unpaid balance and its age.
- Retainage outstanding and the conditions for release.
- Forecast minimum cash balance by project and for the company.
- Supplier and subcontractor payments due before the next reliable receipt.
- Change-order costs incurred without written approval.
Review these indicators in the same weekly meeting as schedule and safety issues. A worsening approval lag is an early warning even when total accounts receivable appears healthy.
Set credit and contract gates before starting work
Evaluate a new client’s credit, payment history, contract form, billing requirements, retainage, dispute process and security before mobilization. Confirm who can approve changes and whether the contract permits suspension, interest or recovery of collection costs. Price the expected financing burden into the job only when the contract and local law support that assumption; never hide an unpriced payment risk inside an optimistic margin.
Quick Recap
A practical decision path
- Forecast: identify the lowest cash point, amount and duration using realistic approval and payment dates.
- Remove avoidable delay: correct the billing package, obtain acceptance evidence and resolve specific disputes.
- Re-time outflows: align procurement and labor with the work plan, negotiate documented supplier terms and protect contractual payment obligations.
- Collect: follow the calendar, escalate through designated contacts and preserve the record for any contractual remedy.
- Check legal context: apply the actual contract and jurisdiction; use FAR rules only for covered federal work.
- Finance the residual: compare invoice financing, factoring, a revolving line or an eligible contract facility against total cost, recourse, collateral and repayment timing.
- Reforecast weekly: reduce or repay the facility as soon as the client pays, and investigate why the gap occurred.
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