Cash Flow Mastery / October 2026 / Nathan Miller

There is a problem that catches growing companies, and most owners do not see it until they are inside it. There is also a strategy for getting ahead of it. Both come down to how you use credit to manage cash flow. If you do not have a line of credit and know how to use it to your advantage, growth can kill your business. The growth that kills it is usually the good kind, the kind you worked for.

The Federal Reserve’s latest Small Business Credit Survey shows how common this is. Of the firms that applied for financing in the past year, 56% did so to meet operating expenses. Credit cards are the most common financing product in use, alongside loans and ahead of lines. And 59% of owners with debt have personally guaranteed it. Put those three numbers together. Short-term credit, the kind built to bridge the cost of a job until the job pays, is being used to cover overhead and losses instead. That is a different problem, and credit cannot fix it.

Profit first, then cash flow

To be clear, profitability is the foundation. A company that is not making money on its jobs does not have a credit problem to solve, and fixing that is outside the scope of this article. But profitable companies run into cash flow trouble too, and the faster they grow, the worse it gets. Let’s take a construction company as an example throughout this article: every new job requires cash out for crews and materials before the cash comes in. Growth consumes working capital in proportion to its speed. The profit on that job shows up as money in the bank months after the cash to build it went out. Knowing how to use credit to manage cash flow is what separates the profitable companies that keep growing from the ones that stall. The rest of this article is for them.

Why growth creates a cash flow problem

Here is a common scenario. A contractor is doing solid work with a full pipeline when a government shutdown stops his receivables cold. He has a $500,000 line with a regional bank and goes back to ask for more runway. The bank looks at his numbers and says no. From there he goes to a merchant cash advance, which drains the daily flow. Then he turns to credit cards to escape the advance. Now he is paying the cards down out of whatever growth and cost cuts he can find.

Each step made sense at the time. The bank pulled the line because the business was already in trouble, which is exactly when a lender stops extending. After the line closed, the advance was the only money available. Cards were cheaper than the advance. He reached for each tool after the previous one failed, so each one came in on the worst possible terms.

Timing, not profitability

Once a company grows past a certain size, the issue is usually no longer profitability but timing. A $15 million contractor doing large projects is often forced to carry $3 million in payables. The jobs pay in sixty or ninety days. If that owner never planned for the capital the growth required, the line gets maxed and the bank stops lending. The only move left is to grow more, which widens the gap again.

The trouble rarely starts with the credit itself. It starts earlier, with two things. Jobs were not priced to produce real profit, and there was no long-term plan to put the right tools in place before the growth arrived. When that happens, the line and the cards stop bridging the cost of goods on a job and start covering rent, salaries, and the loss on last month’s work. Short-term credit was never built for that, and the balance never comes down because no invoice is coming to pay it.

Two kinds of credit, two different problems

Short-term credit, meaning vendor terms, cards, and the line, is built to bridge the cost of a job for weeks or a few months until that job collects. Long-term credit, meaning a term loan or equipment financing, is built to spread a large purchase over years. Overhead itself is a monthly cost, and the company has to be profitable enough to cover it from day one. What long-term credit does is take the big-ticket items out of the overhead budget: trucks, equipment, the shop buildout, startup costs. Each one becomes a fixed monthly payment that annual profit can absorb. The company stays profitable on an annual basis while carrying those payments. It does not drain a year of cash to buy the asset outright.

Using short-term credit to solve a long-term problem is where companies get into serious trouble. The line was sized for job costs, so overhead fills it in a few months. The card carries a balance that never clears because no single invoice is coming to pay it. Interest accrues at short-term rates on a problem that is not going anywhere. By the time the owner looks for a term loan, the balance sheet shows a maxed line and revolving card debt, and the bank that would have written the loan a year earlier now declines it. Match the length of the debt to the life of what it funds – that one rule makes a huge difference.

Three strategies to manage short-term credit

Credit is a way to buy days. Each tool buys days at a different price, and the discipline is in knowing which one you are using and why. Stacked in the right order, they cover the gap between the day material hits the job and the day you get paid.

Vendor terms: the first gap

Whatever terms your supplier gives you, 15 days or 45, that is someone else’s money at no cost. It is the cheapest credit you will ever get, which is why it deserves the same management as any other asset. Someone in the business should own vendor terms the way someone owns collections. Better terms come from a relationship built over years. Behind that relationship sits a deliberate plan to keep working each vendor toward longer terms and higher limits.

The business card: the second gap

Pay the vendor with a business card on the due date and you have roughly 30 more days before the statement is due. The card is for float. It bridges the gap between the vendor’s due date and your own collection date. It costs nothing if you pay the balance when the statement closes. The moment a balance rolls over, the card stops being a float tool and becomes the most expensive debt in the building.

The line of credit: as many days as the job needs

Say the job pays 45 days after the card is due. Draw on the line to pay the card, and you are no longer working in 30-day blocks. A line charges interest per day, for as long as the balance is outstanding. If the job pays in 45 days, you pay for 45 days. If it pays in 75, you pay for 75. The line is for timing. It is the tool that lets a company take on a larger job than its cash on hand could carry, and it is the center of any plan to use credit to manage cash flow.

Stack the three and a purchase can sit in the cycle for 90 days or more. The first 60 of those days cost nothing. The line carries the rest, and you pay interest for each day it does. If you finish the job, invoice it, and collect inside that window, your own cash never left the account. The only cost was interest on the days the line carried the balance, and that cost goes into the job’s price.

Price the cost of credit into the job

A line of credit is not free, and the cost is easy to calculate. A bank line for a company this size prices at prime plus one to three points. Call it 10% to keep the math simple. Carry $80,000 of material on the line for 45 days and the interest is $80,000 × 10% ÷ 365 × 45 = $986. That $986 belongs in the estimate for that job, in the price, not buried in overhead. Compare that to the same $80,000 rolled over on a card at 24%: $80,000 × 24% ÷ 365 × 30 = $1,578 for a single month, and $19,200 if it sits there a year. Credit you never price is margin you give away, and the client who got the lower number never knew it.

Get the line of credit before you need it

The contractor above learned this the expensive way. A lender extends credit based on your numbers, and your numbers are strongest when you do not need the money. Apply then, while receivables are current and the balance sheet is clean. Once you have the line, use it. A line that sits untouched for a year gets reviewed, and often reduced or closed. A bank earns nothing on an unused commitment. Draw on it for a real job at least once or twice a year and pay it back on schedule. The line stays open and grows with you.

Three kinds of money, and why credit is only one of them

A business that wants to use credit to manage cash flow needs three separate buckets. They are easy to confuse, because two of them fund the same gap.

Bucket 1: Credit tools

Vendor terms, the card, and the line. This is the lender’s money, and it buys days. It bridges the cost of goods on a specific job, and that job pays it back when it collects. Every dollar of it should tie to a receivable. If this credit is covering overhead with no invoice behind it, it has stopped doing its job, and the business has a profit problem, not a credit problem.

Bucket 2: Operating capital

This is your own money sitting in the same gap. The gap itself is the cash conversion cycle: the days between paying for a job and collecting on it. Credit tools and operating capital both fund it. The difference is whose money it is, and the mix between the two is what decides whether growth is survivable.

A bank sizes a line against the capital you already have in the business. If the owner’s share of the gap is zero and credit funds all of it, every new job is 100% borrowed. The line fills up in proportion to revenue, and the bank caps it long before the pipeline does. That is the $15 million contractor with $3 million in payables and a maxed line.

Operating capital also covers the parts of the cycle credit cannot be tied to. Payroll and overhead run every week regardless of when jobs collect. Retainage sits unpaid until project close. And whatever part of the gap exceeds the line’s limit has to come from somewhere. When a company plans to double, this number has to be calculated and funded first. Otherwise every new job pushes the business deeper into the bank.

Bucket 3: Emergency fund

This money is for the truck that dies or the month a major client goes dark. It stays separate from operating capital and never funds growth. JPMorgan Chase Institute data shows that half of small businesses hold fewer than 15 days of cash buffer. In Atlanta the median is 11 days. Eleven days of cash will cover one payroll and not much else.

Keeping the three apart changes what profit means for an owner who plans to use credit to manage cash flow. The owner of a growing business cannot pull all of it out at year end. One part funds the operating capital next year’s growth will require. Another part builds the emergency fund. What is left is the owner’s. Leaving the first two in is what allows the business to use credit by choice instead of by necessity.

What disciplined cash flow looks like

In practice, the discipline to use credit to manage cash flow comes down to who owns what. A few things we see in companies that have it right.

• Someone owns vendor terms. The accounts payable person works each vendor relationship on a schedule and tracks the terms by vendor.
• Someone owns unbilled work. Five unfinished punch lists are five invoices that cannot go out. One person owns closing them.
• Payment priority is a decision, not a default. When cash is tight, someone decides who gets paid first. People come first, then the relationships that cannot afford a late payment.
• Debt gets restructured when the monthly payment is the problem. Stretching a term costs more over the life of the loan. Sometimes that is the right trade for the cash the business needs to operate this quarter.
• The cost of credit shows up in the pricing model. Interest is a line in the estimate, not a surprise on the P&L.

Cash flow is somebody’s job

This is the Cash Flow Mastery side of the work we do with clients. It usually begins with a financial ratio review to see how much cash the business consumes. It ends with a pricing model that carries the cost of money. The owners who get there no longer treat credit as something that happens to them. They use credit to manage cash flow on their own terms. Scaling a business on borrowed time works for a while. It tends to break at the exact moment the bank decides your numbers no longer support it.

Credit is leverage, and leverage multiplies whatever is underneath it. On a job priced to make money, the line lets you take work your cash could not have carried, and you earn the full margin on it. On a job priced wrong, the same line lets you lose money faster and pay interest on the loss. The owners who do well with credit can say, for every dollar borrowed, how many days it buys, what it costs, and which job is paying for it.