A construction firm doing $4M a year shouldn't carry materials, subcontractor bills, or equipment rentals on a business credit card for the float, and the reason is arithmetic. At $4M in annual work, materials, subs, and rentals run roughly $230K to $300K a month. A business card's limit is set by the company's credit profile and lands at a fraction of that, so the card covers part of one month's spend and then it's full. The cash back is worth a point or two on what you charge, and it's gone the first month a balance carries past the statement date, because the carrying cost on a card is several times the rebate. And a card balance of any size sits on the company's credit report, where every surety and every lender reads it as unsecured debt at the worst possible terms. The tool that fits a $4M firm is a revenue-based working-capital line sized to four months of deposits, roughly 10 to 15 percent of annual gross, so $400K to $600K, funded in one to three days, drawn as materials are ordered and repaid as draws land, with progress-billing financing on the pay applications so the owner's net-30 to net-60 isn't yours to carry. Keep the card for the small vendor spend you pay in full every month. That's where the cash back is real.
Here's what it looks like on a real file. A Denver contractor moving into commercial work needed a shop, heavier iron, and bonding capacity at the same time. The $2.5M structure funded in 24 days included a $300K working-capital layer for exactly the spend in this question: materials on the first commercial job, sub deposits, payroll before the first pay application. The contractor bid the first commercial job in month one. Nobody suggested a credit card.
what a $4M-revenue construction firm's working-capital line sizes to on four months of deposits, funded in 1 to 3 days, versus a card limit that covers part of one month's materials
— Revenue-based sizing at 10 to 15 percent of annual gross; Denver contractor's $300K working-capital layer inside a $2.5M structure, funded in 24 days
What the Card Actually Does for a $4M Firm
It covers a fraction of the spend. A $4M contractor's materials and subs are the biggest number in the business. A card limit sized to the company's credit covers one supplier's invoice, not the month's, and the moment a big order lands the card is maxed and the supplier is waiting again.
The cash back only exists if you pay in full. A point or two back on a $40K materials order is $400 to $800. Carry that $40K past the statement for one cycle and the finance charge is more than the rebate; carry it for the 45 to 60 days it takes the owner to pay the draw and you've paid the card several times what it paid you.
The balance is visible everywhere. A surety sizing your bond program and a lender sizing your next line both pull the company's credit. Revolving card balances read as the most expensive debt a company can carry, and a utilization spike in the month you floated a big job reads as stress. The working-capital line is sized to the deposits and reported as a business facility; it doesn't light up the same way.
It can't be drawn against the draw. A card doesn't know you have a $350K pay application approved and 45 days from payment. Progress-billing financing does: it advances the approved pay app in 24 to 48 hours, underwritten on the owner's credit, which is the thing that makes a $4M firm's cash flow work.
Bottom line:
A card floats a small vendor for thirty days and pays you a point or two for the privilege, if you pay it off. A $4M construction firm's gap is $250K a month for 45 to 60 days. Those are different problems. The line and the progress-billing facility are built for the second one.
The Tools That Fit, and What Each One Is For
A revenue-based working-capital line, $400K to $600K. Sized to four months of business bank statements at 10 to 15 percent of annual gross. Opens in one to three days, draws same-day once it's open, interest only on what's out, repaid as the draws land. This is the materials order and the sub deposits. Working capital is the product page; the line of credit is the revolving version.
Progress-billing financing on the pay applications. Each approved pay app advances in 24 to 48 hours instead of the owner's net-30 to net-60, underwritten on the owner's credit, revolving draw by draw. On a $4M firm with monthly pay apps of $300K to $350K, this is what keeps the subs paid on their terms while the owner pays on theirs. A/R and progress-billing financing is the product page.
Supplier terms, negotiated from strength. A supplier that knows you have a line in place gives net-30 and early-pay discounts to a contractor who can take them. The line is what lets you take the two percent for paying in ten days, which beats any card's cash back and doesn't carry.
Equipment financing on the rentals you keep renting. If the same excavator is on rent nine months a year, it's cheaper owned, on a loan sized to the machine, with the full price deductible in year one under Section 179. The excavator post runs that math; the GC mobilization page covers the job-level version of all of this.
What the Right Tool Is Worth at $4M
The question underneath the card question is "how do I say yes to the next job without starving this one." A card doesn't answer it. A $500K line and a progress-billing facility do: the materials order goes out the day the contract signs, the subs get paid on their terms, the owner's 60 days stop being your 60 days, and the surety sees a company that funds its work instead of floating it. That's the difference between a $4M firm and a $6M firm with the same crews.
See what $4M of revenue sizes a line at.
Start Your Funding Request →What Sizes the Line
The deposits. Four months of business bank statements. At $4M the lender wants to see the monthly inflow the draws produce, with no overdraft pattern. Seasonal swings are fine; a lender that writes contractors every day sizes the line to the trough.
Time in business. Six months is the floor; two years and a completed-jobs list put a $4M firm on the standard track with room above the 15 percent.
The receivables. For the progress-billing layer: the executed contracts, the pay-application schedule, and the owners' credit. Public owners and developers with construction loans in place are the easiest paper.
Not the card history. A firm that's been floating on cards usually has high utilization and a thin bank-statement picture, because the deposits went to the card. Clean that up for one cycle before applying: pay the cards down from the next draw, let the statements show the real deposits, then size the line.
| Spend | On a card | On the right tool | Why it matters |
|---|---|---|---|
| $250K/month materials and subs | Covers a fraction, then maxed | $400K–$600K line, drawn as ordered | The whole order ships on contract day |
| Owner's net-30/60 on a $350K pay app | Carried on the card, rebate gone | Advanced in 24–48 hours on the owner's credit | The subs get paid on their terms |
| Small vendor spend, paid in full | Cash back, real | Keep it on the card | A point or two, with no balance |
| Rentals you keep renting | Monthly on the card | Equipment financing, Section 179 | Owned, deductible, off the operating account |
Contractors in Texas and Colorado send us the $4M version of this question every month. Capital stacking is the principle: each spend goes to the tool built for it. The construction hub has the full set.
Denver residential contractor moving into commercial work
Owner-occupied CRE + equipment financing + working capital
$2.5M
$300K working-capital layer funded materials, sub deposits, and payroll on the first commercial job; shop and iron funded alongside in 24 days
See the full case →What to Have Ready
Four months of business bank statements. The current contracts and their pay-application schedules. Your materials and sub spend by month for the last two quarters. The card balances, so the line can be sized to retire them if that's part of the plan. Two years of returns if you have them; under two, the statements and the contracts carry it.
Size the line to the business, not the card
One application, one soft pull. The materials go on the line, the draws go on the owner's credit, the card goes back to what it's good at.
Here's What Most People Get Wrong
They treat the card as a line of credit because it's the one the bank already gave them. They put a $60K materials order on it in March, the owner pays in May, and the cash back on the order is a tenth of what the two statements cost. Then the surety pulls credit in June for the next bond and asks about the utilization. The $4M contractors who stop living on cards aren't the ones with better credit. They're the ones who got a line sized to the business, put the draws on the owner's credit, and kept the card for the fuel and the fasteners.
Frequently Asked Questions
Should a construction company use a business credit card to pay suppliers and subcontractors?
Only for small vendor spend it pays in full every month, where the cash back is real. For materials, subs, and rentals at $4M in annual work, the card's limit covers a fraction of one month's spend, the rebate disappears the first month a balance carries, and the balance shows up on every bond and credit review. A revenue-based working-capital line of $400K to $600K plus progress-billing financing on the pay applications is the tool built for that spend.
How big a working-capital line can a $4M construction firm get?
Roughly $400K to $600K, sized to four months of business bank statements at 10 to 15 percent of annual gross, funded in one to three days. Strong deposits, two years in business, and a completed-jobs list push toward the top of the range, and progress-billing financing on the receivables adds availability on top of it.
Does the cash back on a business credit card make it worth using for materials?
Only if the balance is paid in full by the statement date. A point or two back on a $40K order is $400 to $800; carrying that order for the 45 to 60 days an owner takes to pay a draw costs several times the rebate. An early-pay discount from a supplier, taken with a line behind you, beats any card's cash back and carries nothing.
What is progress billing financing for a contractor?
A facility that advances each approved pay application in 24 to 48 hours instead of the owner's net-30 to net-60, underwritten on the owner's credit rather than the contractor's, revolving draw by draw through the job. It's the tool that lets a $4M firm pay subs on their terms while the owner pays on theirs.
Do credit card balances hurt a contractor's bonding capacity?
They can. A surety reads revolving card balances as unsecured debt at the most expensive terms a company carries, and a utilization spike in the month a job was floated reads as stress. A working-capital line sized to the deposits is reported as a business facility and reads as a company that funds its work.
How fast can a construction firm get a working-capital line in place?
One to three days to open on four months of bank statements; same-day draws once it's open. Progress-billing financing funds each approved pay app in 24 to 48 hours. The $2.5M structure above, which included a $300K working-capital layer, funded in 24 days because it also carried real estate.
Bobby's Take
The credit-card question is really a $4M contractor telling me the bank never gave him a line, so he's running the company on the one revolving account he has. I understand the instinct. The points feel like getting paid to do what you were going to do anyway. But the math on a $250K-a-month materials book doesn't care about points. It cares whether the order ships on contract day and whether the subs get paid before the owner does. Get the line sized to the deposits, put the draws on the owner's credit, and let the card go back to the fuel and the fasteners. The contractors who grow past $4M aren't the ones earning the most cash back. They're the ones who stopped financing the company on a card.
