Construction is one of the few industries where a profitable company can run out of money. The margins can be fine, the backlog can be full, and the bank balance can still hit zero.
That is not a management failure. It is structural, and understanding why is the first step to fixing it.
Key Takeaways
- Contractors fund the work themselves and get reimbursed later, which makes them lenders to their own clients.
- Retainage withholds a percentage of every invoice, commonly 5 to 10 percent, often until well after completion.
- Pay-when-paid clauses push the owner’s payment delay down onto subcontractors.
- The gap between doing the work and being paid frequently runs 60 to 120 days.
- Financing bridges timing problems, and it does not fix a pricing or collections problem.
You Are Funding the Job
Start with the basic sequence, because it explains everything downstream. You buy materials, pay crews and run equipment, then you invoice, then eventually you get paid.
Every one of those costs lands before the money arrives. In practical terms, the contractor finances the project on the client’s behalf and gets reimbursed afterward.
Mobilization makes it worse at the start. Materials, permits, equipment moves, and initial labour all hit before the first progress payment is even billable.
Growth compounds it rather than relieving it. Taking on more work means funding more of it upfront, which is why contractors most often run into trouble during expansion rather than during a downturn.
Retainage Is the Structural One
This is the mechanism most outsiders do not know about. Retainage, also called retention, is a percentage withheld from each progress payment and held until the project reaches completion.
Commonly, it runs 5 to 10 percent, and many states regulate the maximum and the release timeline.
On a million-dollar contract at 10 percent, that is a hundred thousand dollars of earned revenue you cannot touch.
The timing is the painful part. Retainage is often released only after substantial completion, final inspection, or closeout documentation, which can be months after the last crew left site.
That money is not a bonus. It is margin you already earned, sitting on someone else’s balance sheet while you fund the next job.
Pay-When-Paid Pushes the Delay Downhill
Subcontractors face a second layer. Many subcontracts include pay-when-paid or pay-if-paid clauses, meaning the general contractor pays you once the owner pays them.
The distinction between the two matters considerably. Pay-when-paid generally delays payment for a reasonable period, while pay-if-paid can make the owner’s payment a genuine condition of yours, shifting the risk of owner non-payment onto you.
Enforceability varies by state, and some jurisdictions restrict or void pay-if-paid clauses. Have your contracts reviewed rather than assuming a clause means what it appears to.
The practical effect is that a delay three levels up lands on the smallest business in the chain.
Change Orders Are Unfunded Work
Every contractor knows this one. Work gets requested, work gets done, and the paperwork catches up later.
Until a change order is approved and billed, that labour and material sits on your books as cost with no matching receivable. On a job with significant scope movement, it can add up quickly.
Get them signed before the work happens where you can. Where you cannot, track them precisely, because reconstructing them at closeout is how contractors lose money they genuinely earned.
How Long the Gap Actually Runs
Add up the sequence and the number surprises people. Work performed in one month typically gets billed at month-end, then sits on payment terms of 30, 60, or occasionally 90 days.
That puts 60 to 120 days between spending the money and receiving it, before any retainage is considered. Retainage extends a slice of it far longer.
Meanwhile, payroll runs weekly or biweekly, and suppliers want to be paid in 30 days. The mismatch is the whole problem, and it is a timing problem rather than a profitability one.
What a Line of Credit Actually Solves
A line of credit is built for exactly this shape of problem, because it revolves. You draw what you need when costs land, repay when the client pays, and the facility becomes available again for the next job.
That structure matters more in construction than in most industries. A term loan gives you a lump sum on a fixed schedule regardless of where you are in a project cycle, whereas a revolving facility matches the way money actually moves through a contracting business.
The honest limitation is worth stating. Financing solves timing, and it does not solve underpricing, poor change order discipline, or clients who simply do not pay.
If your gap is structural and predictable, borrowing against it is a reasonable cost of doing business. If it exists because jobs are bid too thin, borrowing postpones the problem at interest.
Cost matters accordingly. Ask for an annualised figure rather than a factor rate, since a multiplier tells you nothing about the term it applies over.
The Other Tools Worth Knowing
A line of credit is not the only option, and the right one depends on the gap.
Invoice factoring advances against specific receivables, which suits companies with creditworthy clients and long payment terms. You are effectively selling the invoice rather than borrowing against your revenue.
Equipment financing keeps machinery purchases off your working capital entirely, which preserves the line of credit for payroll and materials.
Mobilization funding and material financing exist specifically for upfront project costs. Where seasonality is the issue rather than any single job, a facility sized for the slow months is the more sensible structure.
Know Your Own Numbers First
Before borrowing against the gap, measure it. Most contractors have a rough sense, and few have the actual figure.
Calculate your days sales outstanding, meaning the average time between invoicing and receiving payment. Do it per client, because one slow payer often accounts for most of the problem.
Then add your typical mobilization spend and outstanding retainage. That total is the working capital your business genuinely needs to operate at current volume, and it is the number a facility should be sized against.
Track it by job as well as overall. A single project running at negative cash flow can be masked by the rest of the book until it is not.
Why Banks Find Construction Difficult
Contractors often assume they were declined for something they did wrong. Usually it is the industry rather than the business.
Bank underwriting wants two years of tax returns, formal financial statements, accounts receivable reports, project budgets, equipment schedules, and typically a credit score around 700 or above. Many contractors do not keep records in that format, and the process runs weeks to months.
Banks also assess debt service coverage and debt-to-equity, and construction balance sheets look volatile because work in progress and retainage distort them. Prior liens or judgments, which are not unusual in this trade, complicate matters further.
Revenue-based providers underwrite differently, mainly on bank statements and deposit consistency. It is faster and generally costs more, which is the trade-off.
Protect Yourself Beyond Financing
Financing manages the gap, and it does not replace the legal tools that exist to get you paid.
Mechanic’s lien rights are the significant one, and they run on strict deadlines that vary by state. Preliminary notice requirements, filing windows, and enforcement periods all differ, and missing one can forfeit the right entirely.
Prompt payment statutes exist in most states and set timeframes for payment on both public and private work. Many contractors never invoke them.
Talk to a construction attorney about your standard contract terms rather than only about disputes. The clause you negotiate at signing is worth more than the remedy you chase afterward.
Conclusion
Construction cash flow problems are structural, not a sign of mismanagement. Retainage, payment terms, and change order lag combine to put months between the work and the money.
Know the size of your typical gap, choose a facility that matches its shape, and price the borrowing into your bids rather than absorbing it. Then protect the receivable through your contracts and your lien rights.
Construction Cash Flow FAQs
Why do profitable construction companies run out of cash? Because costs land before payment arrives. Materials, payroll, and equipment are funded upfront while invoices settle 30 to 90 days later.
What is retainage? A percentage withheld from each progress payment, commonly 5 to 10 percent, released after completion. Many states regulate the maximum and timeline.
What is a pay-when-paid clause? A subcontract term making payment to you dependent on the general contractor being paid. Pay-if-paid variants shift more risk, and enforceability varies by state.
How long is the typical payment gap? Frequently 60 to 120 days between performing work and receiving payment, with retainage extending part of it considerably longer.
Is a line of credit better than a term loan for contractors? Usually, because it revolves. You draw against project costs and repay as clients pay, rather than servicing a fixed schedule.
What is invoice factoring? Advancing funds against specific unpaid invoices. It suits contractors with creditworthy clients and long payment terms.
Why do banks decline construction companies? Documentation requirements, higher credit thresholds, volatile balance sheets from work in progress and retainage, and any prior liens or judgments.
What should I ask about financing cost? Ask for an annualised percentage rather than a factor rate, since a multiplier does not indicate the term it applies over.
Should change orders be signed before work starts? Wherever possible, yes. Unsigned change orders are unfunded work, and reconstructing them at closeout is where contractors lose earned money.
What are mechanics lien rights? A legal remedy securing payment against the property. Deadlines and notice requirements vary by state, and missing one can forfeit the right.