Key Takeaways
- Profitable subcontractors can run short on cash when payroll and supplier bills come due before GC payments.
- Retainage is money withheld from progress payments; it should be forecast separately from normal collections.
- Pay-when-paid and pay-if-paid clauses carry different risks, and their legal effect depends on applicable law.
- A rolling 13-week cash forecast shows which week cash could fall below the amount needed for payroll and operations.
- Tracking payment-protection deadlines alongside receivables helps prevent avoidable collection problems.
Busy Crews, Empty Bank Account
Your electrical crews are working full weeks. The pay applications have been submitted. Your P&L shows profitable projects.
But it’s Thursday, payroll is tomorrow, and the general contractor (GC) still hasn’t released payment.
One invoice is waiting for approval. Another is approaching 60 days. Ten percent of each progress payment is being held as retainage.
You start using money collected from an older job to fund labor on the next one. That cycle can feel impossible to escape.
How do you make payroll when the GC takes 60–90 days to pay?
You can’t control every GC payment date. You can, however, forecast the gap between the work you’re funding and the cash you’re likely to collect.
Why Profitable Subcontractors Still Run Out of Cash
Construction profit and available cash operate on different schedules.
You may pay crews weekly and suppliers within 30 days, while a pay application moves through submission, review, approval, owner payment, and GC disbursement.
Equipment, insurance, taxes, and overhead don’t stop while you’re waiting.
On an accrual-based P&L, you may have earned revenue. On your bank statement, you still need cash.
A profitable contract isn’t automatically a self-funding contract. Rapid growth can make matters worse when new projects require more upfront labor and materials before collections begin.
What Is Retainage in Construction?
Retainage is a portion of progress payments withheld under the project agreement, often until specified completion or closeout conditions are met.
Suppose you bill $100,000 with 10% retainage. That leaves $90,000 potentially payable through the ordinary progress-payment process and $10,000 withheld.
Neither amount is necessarily in your bank account yet.
Retainage can remain outstanding after your specific trade’s work is finished, depending on project terms, closeout documentation, applicable law, and release conditions.
Forecast retainage as a separate expected receipt, not cash you can use for next Friday’s payroll. Retainage limits and payment requirements vary by jurisdiction and project.
Pay-When-Paid vs. Pay-If-Paid: Know the Difference
The two phrases sound similar but may allocate risk differently.
Pay-when-paid generally ties the timing of a subcontractor’s payment to the GC receiving payment from the owner. It does not necessarily eliminate the GC’s obligation if the owner never pays.
Pay-if-paid may attempt to make owner payment a condition of the GC’s obligation to pay the subcontractor, potentially shifting nonpayment risk downstream.
The legal treatment of both provisions varies by state, project type, contract wording, and prompt-payment rules. Have qualified construction counsel review unfamiliar terms.
For forecasting, the practical rule is simple: Don’t schedule cash based only on an invoice’s due date or a verbal promise. Use realistic collection dates and model additional delays.
Example: 90% Complete, but 45% of the Contract Is Still Uncollected
Consider a mechanical subcontractor with a $400,000 contract.
The project is 90% complete. For this simplified example, $360,000 of work has been earned and billed.
So far, the subcontractor has collected just $180,000.
Of the $180,000 billed but uncollected:
- $144,000 represents outstanding progress billings.
- $36,000 represents 10% retainage on the $360,000 billed.
That means 45% of the entire contract value is still uncollected, even though the job is 90% complete.
Another $40,000 of contract work remains to be completed and billed.
Not all the outstanding amount is necessarily overdue. But none of it can cover today’s payroll until it is actually received.
Meanwhile, crews and suppliers have already been paid—or are expecting payment—for much of the completed work.
This is the subcontractor’s working-capital problem in plain sight.
How to Build a 13-Week Cash Flow Forecast for Subcontractors
A 13-week cash flow forecast projects cash coming in, cash going out, and the remaining bank balance for each of the next 13 weeks.
It’s short enough to model specific payments and long enough to identify a developing shortage.
Step 1: Start With Available Cash
Use current, reconciled cash balances. Don’t count restricted funds or unused borrowing capacity as cash already available.
Step 2: Forecast GC Collections by Project
List open pay applications and invoices. Record their approval status, expected amount after retainage, and realistic payment week.
If a GC routinely pays around Day 75, don’t forecast receipt on Day 30 just because the invoice says net 30.
Keep disputed changes and uncertain collections separate from high-confidence receipts.
Step 3: Keep Retainage on Its Own Schedule
Track retainage by job and anticipated release conditions. Include it in a forecast week only when there is a defensible expected receipt date.
If the release date is uncertain or beyond 13 weeks, don’t use that money to solve a near-term shortage on paper.
Step 4: Enter Every Significant Cash Outflow
Include payroll, payroll taxes, benefits, suppliers, lower-tier subcontractors, equipment, fuel, insurance, rent, debt payments, and planned purchases.
Use the week cash will leave—not merely the month the expense belongs on the P&L.
Step 5: Calculate Weekly Ending Cash
Beginning Cash + Expected Cash Receipts − Expected Cash Payments = Ending Cash
Carry each week’s ending balance into the next week. Compare it with your minimum operating cash requirement.
Step 6: Update It Every Week
Replace forecasts with actual collections and payments, revise GC receipt dates, investigate differences, and add another week.
A forecast is a management routine, not a spreadsheet you build once.
What If the Forecast Shows You Can’t Make Payroll?
Suppose your company starts with $80,000 in available cash, expects $25,000 in weekly payroll and other payments, and has no further collections expected until Week 6.
At the end of Week 3, only $5,000 remains. By Week 4, the forecast shows a $20,000 cash shortfall.
Now the problem is visible before payroll is due.
Management can escalate approved but unpaid applications, resolve missing documentation, negotiate lawful payment arrangements, delay discretionary purchases, review work scheduling, or evaluate available working-capital financing.
None of those actions is guaranteed to solve the gap. And payroll or required tax remittances shouldn’t be treated as optional.
The value of forecasting is that you can act while options remain.
Why Lien and Bond Deadlines Are Cash Flow Issues
A dangerous assumption is that payment-protection deadlines won’t matter until the GC officially refuses to pay.
In reality, preliminary notices, mechanics’ lien deadlines, payment-bond claims, and related requirements may run according to statutory triggers that don’t match your invoice due date or retainage release.
On some projects, the deadline to protect payment rights can arrive before retainage is released.
Private and public projects may involve different remedies. Deadlines and notice requirements also vary substantially by jurisdiction.
Have construction counsel establish the requirements for each project. Then track those dates alongside expected payments, retainage balances, and collection follow-ups.
Review lien waivers carefully, too. A conditional waiver generally works differently from an unconditional waiver, which may surrender specified rights regardless of later payment.
Preserving payment rights is part of protecting future cash, not just a task for an attorney after collections fail.
What Can Subcontractors Do to Reduce the Payment Gap?
Forecasting won’t change the GC’s payment habits by itself. Pair it with operating discipline:
- Review payment and retainage terms before bidding or signing.
- Submit complete pay applications before cutoff dates.
- Follow up quickly on rejected applications and missing documents.
- Track approved change orders, outstanding billings, and retainage separately.
- Negotiate supplier terms that better reflect actual collection timing, where feasible.
- Maintain a realistic cash reserve and explore financing before a crisis.
- Evaluate how much working capital each new project will require.
Winning more work can actually increase cash pressure when every new job needs funding before its first collection.
WIP Reporting and Cash Forecasting Answer Different Questions
Your work-in-progress (WIP) schedule helps show earned revenue, costs incurred, billings, and projected job margin.
Your 13-week cash forecast shows when you expect money to hit or leave the bank.
A WIP schedule may show a healthy job margin and substantial receivables. That doesn’t mean the corresponding cash will arrive before payroll.
Subcontractors need both views: Are our jobs profitable? And can we fund the work until we’re paid?
Conclusion
When the GC pays in 90 days, making payroll becomes a working-capital challenge—not simply a sales problem.
The solution starts with knowing which dollars are billed, which are withheld as retainage, which are realistically collectible, and when obligations will come due.
A 13-week forecast can’t force payment. But it can expose a shortage early enough to improve collections, plan financing, protect payment rights, and make deliberate spending decisions.
Stop managing payroll from today’s bank balance alone. Start managing it with the next 13 weeks in view.
Make Payroll More Predictable With PHG Advisory
At PHG Advisory, we help subcontractors understand the cash demands behind profitable construction work.
Through Fractional CFO and financial advisory services, we can help build rolling 13-week cash flow forecasts, analyze GC payment patterns, monitor retainage and Accounts Receivable, evaluate working-capital needs, and model the impact of delayed collections.
We connect that forward-looking planning with reliable bookkeeping, WIP reporting, and project financial visibility.
If your business is constantly waiting on GC payments to fund payroll, contact PHG Advisory to build a clearer cash plan before the next shortage arrives.
Frequently Asked Questions
What Is Retainage in Construction?
Retainage is a portion of progress payments withheld under a contract, often until specified completion or closeout conditions are satisfied.
How Does Retainage Affect Subcontractor Cash Flow?
It delays collection of money associated with work performed while payroll, materials, and overhead still require payment.
What’s the Difference Between Pay-When-Paid and Pay-If-Paid?
Pay-when-paid generally concerns payment timing. Pay-if-paid may attempt to shift the owner’s nonpayment risk to the subcontractor. Enforceability varies by jurisdiction and contract.
How Can a Subcontractor Make Payroll While Waiting for GC Payment?
Build a weekly cash forecast, track likely collections, preserve reserves, resolve billing delays promptly, and evaluate lawful financing or spending adjustments before a shortfall develops.
How Should Retainage Be Forecast?
Track it separately from progress billings and use realistic, supportable release dates. Don’t assume it will be received when your specific trade finishes work.
Can a GC Hold Retainage After a Subcontractor Finishes Its Work?
Depending on the contract and applicable law, retainage may remain withheld until specified completion, acceptance, or closeout requirements are satisfied. Subcontractors should review release provisions before signing and track outstanding retainage separately.
Can Lien Deadlines Expire Before Retainage Is Paid?
Yes, depending on the project and applicable law. Have counsel confirm the relevant deadlines rather than assuming they follow retainage payment dates.
Can a Fractional CFO Help With Delayed GC Payments?
Yes. A Fractional CFO can build 13-week forecasts, assess collection scenarios, plan working capital, and help management prepare for upcoming cash requirements.
