Five warning signs your business has a working capital problem: (1) supplier invoices stretching past 30 days due, (2) inventory growing faster than sales (rising days inventory outstanding), (3) repeated overdrafts or a maxed-out credit line alongside negative operating cash flow, (4) payroll becoming a scramble more than occasionally, and (5) seasonal or unexpected gaps that drain reserves. Watch your accounts payable aging, DIO, and operating cash flow monthly — and arrange a line of credit before a tight month forces emergency, high-cost borrowing.
Working capital is the cash that keeps daily operations running — payroll, inventory, the bills that don’t wait. When it thins out, even a profitable business can stumble. The trick is catching the warning signs early, while you still have options. Here are five, with how to diagnose each and what to do about it.
1. Consistently late payments to suppliers
When you start stretching net-30 terms to net-60 or net-90, you’re effectively borrowing from your vendors — without agreeing to it. That strains trust and often triggers late fees, which quietly eat your margin. Suppliers may respond by tightening your credit or demanding cash on delivery, which makes the squeeze worse.
Diagnose: Pull your accounts payable aging report. If a meaningful share of what you owe is more than 30 days past due, your working capital is likely too thin.
Act: Negotiate extended terms, consolidate invoices for leverage, or use a short-term line of credit to smooth payment timing while you renegotiate.
2. Inventory growing faster than sales
Inventory that sits unsold ties up cash you could use elsewhere. A rising inventory-to-sales ratio is a classic warning. Carrying costs — storage, insurance, obsolescence — can consume a significant share of inventory value each year, and stale stock often forces markdowns on top of that.
Diagnose: Track your days inventory outstanding (DIO). If it’s running well above your industry’s norm, you’re holding too much.
Act: Move to leaner, just-in-time ordering, run clearance events to free up cash from stale stock, or use inventory financing to unlock capital while sales catch up.
3. Frequent overdrafts or maxed-out credit lines
Leaning on overdrafts or repeatedly hitting the ceiling of your revolving credit means your operating cash flow can’t cover regular expenses. Beyond the fees, lenders read chronic maxing-out as risk, which can push your rates up or shrink your future credit.
Diagnose: Check your cash flow statement. If operating cash flow is negative for two or more months while you’re borrowing to stay afloat, working capital is deficient.
Act: Tighten receivables with small early-payment discounts, consider restructuring revolving debt into a term loan with predictable payments, and build a reserve target of at least one month of operating expenses.
4. Struggling to make payroll
When payroll becomes a scramble, working capital is too thin to meet even basic obligations. Delaying wages risks overtime costs, hurts morale, and in many places carries legal penalties.
Diagnose: If payroll regularly exceeds a large share of monthly revenue, or you’re delaying it more than occasionally, that’s a clear signal.
Act: Set up a payroll-specific reserve (aim for a couple of weeks of gross wages) and use invoice financing to turn receivables into cash when timing is tight.
5. Unexpected expenses and seasonal gaps
A broken machine or a surprise tax bill can drain reserves that were never meant to absorb shocks. Seasonal businesses face a related strain: revenue dips sharply in the off-season while fixed costs hold steady.
Diagnose: If net cash flow is negative in several months a year, you have a recurring shortfall to plan for.
Act: Build a contingency reserve, and arrange a seasonal line of credit that you draw on only during low-revenue stretches — so you’re not forced into emergency, high-cost borrowing.
Bottom line
Late supplier payments, ballooning inventory, chronic overdrafts, payroll stress, and seasonal or unexpected gaps all point to the same problem: not enough working capital. Watch the key metrics — payables aging, days inventory outstanding, operating cash flow, payroll-to-revenue — and act before a tight month becomes a crisis. Pull your latest statements, run the numbers, and line up a solution that fits your cash-flow cycle.
If a working capital injection is what you need, start by comparing the four main options — line of credit, short-term loan, MCA, and invoice factoring — to understand what each actually costs before you apply. See our working capital loans comparison for 2026 for real rate ranges and a scenario-by-scenario decision guide.
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