Using a Line of Credit the Way It's Meant to Be Used

Why this matters

A line of credit is one of the most useful tools a shop can have and one of the easiest to quietly ruin. Used right, it smooths the gap between finishing work and getting paid, and costs you interest only on the days you actually need the money. Used wrong, it becomes a permanent debt you never chose to take on, at a variable rate, with your emergency buffer gone. The difference is not the line itself, it is the discipline you bring to it. This card is that discipline.

What a line is for

A line of credit is revolving credit up to a ceiling: draw what you need, pay interest only on the drawn balance, pay it back down, and the room refills. Its whole design points at one job: bridging short-term, temporary timing gaps that fix themselves. The right uses share a shape; the thing you fund produces the cash that repays the draw.

• Bridging receivables. You finished the work and invoiced it, but the customer pays in weeks. Draw to cover the gap; the payment clears the draw.
• Buying inventory or materials you will sell soon. Draw to stock up for booked work; the jobs pay it back.
• Smoothing a seasonal swing. Draw to carry fixed costs through a known slow stretch; the busy season repays it.

Each of these is self-liquidating: the funded thing turns back into cash and clears the balance on its own.

The rest test

Here is the single habit that keeps a line healthy: it has to rest at zero. A well-used line swings up when you draw and back down to zero (or near it) on a regular cycle, at least once a year. Bankers even build this in and call it an annual cleanup or a rest period, a stretch where the balance sits at zero to prove the line is being used for timing, not as permanent money.

If your line never touches zero, something is wrong. A balance that only grows, or that plateaus high and never comes down, means the line has silently turned into a term loan you never underwrote, and usually that the business is funding something it should not.

What not to fund with it

• Long-term assets. A truck, a buildout, or equipment does not throw off a lump of cash to repay a draw, so the line never resets. Those belong on a term loan matched to the asset's life. See related: The Difference Between a Line of Credit and a Term Loan.
• Operating losses. If the line is covering the fact that the shop spends more than it earns, borrowing more deepens the hole. The line is a messenger here, not a fix. See related: Cash vs Profit.
• Owner draws. Paying yourself out of the line is borrowing to fund your lifestyle. The draw does not generate cash to repay it.
• Payroll you cannot otherwise make, month after month. A one-time bridge for a late big payment is fine. Chronic payroll on the line is a survival signal, not a timing one.

The tells you are misusing it

• The balance never returns to zero.
• You cannot name what a given draw is funding or how it repays itself.
• You are drawing to make payments on the line's own interest.
• The line is nearly maxed and the next surprise has nothing to absorb it. See related: Your Line of Credit Is Nearly Maxed.

How to use it well

Draw with the repayment source already in sight. Before you take the money, know exactly what turns back into cash to clear it and roughly when. Keep meaningful room open for real emergencies, because that buffer is half the reason to have a line at all. And let it rest at zero on a cycle, on purpose. A line you can always draw on is one you have kept in shape; a line you have leaned on until it is full is one that can no longer do its job.

References

• U.S. Small Business Administration (SBA), lines of credit and working-capital financing
• Trade-standard practice on revolving-credit discipline and annual rest periods
• See related: The Difference Between a Line of Credit and a Term Loan; Your Line of Credit Is Nearly Maxed; Factoring vs Line of Credit