Cash Flow Problems: 10 Early Warning Signs
By Newtown Analytics · · 8 min read
For smb owners & operators
Cash flow problems rarely arrive without warning. The usual pattern is a slow build: customers pay a little later, inventory grows a little faster than sales, suppliers get paid a little later and the credit line gets used a little more. By the time the bank balance is low, the causes are months old. This guide lists ten early warning signs of cash flow problems, shows how to measure each, works through an example in which one sign hides another and sets out what to do first. It supports cash flow management.
The ten signs
1. Days sales outstanding is rising
If customers take longer to pay, cash arrives later. Compare DSO now with 3, 6 and 12 months ago. A rise of several days that is not explained by a change in terms deserves action. See days sales outstanding.
Check: DSO trend and the share of receivables past due on the aging report. See the accounts receivable aging report.
2. Inventory is growing faster than sales
Stock building up ties cash and often hides forecast errors or slow sellers. If inventory grows 20 percent while sales grow 5 percent, cash is being absorbed.
Check: days inventory outstanding and weeks of cover by item class. See days inventory outstanding.
3. Payables are being stretched
Paying suppliers later than terms is a way to borrow without asking. It may signal a cash shortage, and it risks supplier relationships and terms.
Check: DPO versus agreed terms, and the payables aging report. See the accounts payable aging report.
4. The credit line is used more and more
A rising draw on the line, especially if it does not return to a low level in seasonally strong months, shows that operations are not funding themselves.
Check: average and peak utilization of the line, and headroom against the borrowing base.
5. The cash balance keeps touching the minimum
Repeatedly approaching your minimum cash level, or dipping below it for a few days, means there is no cushion. Each time, the company relies on luck, timing or short-term fixes.
Check: the 13-week forecast and a weekly count of days below the minimum. See the 13-week cash flow forecast.
6. Operating cash flow is negative while profit is positive
Profit that does not turn into cash usually reflects growth in receivables and inventory. It is the classic path to overtrading. See cash flow vs. profit.
Check: operating cash flow compared with net income over the trailing 12 months.
7. Margins are slipping
Falling gross margin means less cash from each sale. Causes include discounting, rising input costs and mix shifts. Small percentage declines can mean large cash effects at scale.
Check: gross margin by product and customer, and trend.
8. Large customers pay late or concentration is rising
A late payment from a customer that represents 20 percent of sales can create an immediate gap. Concentration also exposes you to the customer's own difficulties.
Check: the top 5 customers' share of receivables, and their days to pay.
9. Suppliers are tightening terms
If suppliers ask for deposits, shorten terms or ask for payment on delivery, they may see risk in your payment record or your credit reports. This increases your cash needs.
Check: changes in terms reported by purchasing, and trade references.
10. Forecasts keep missing
If your cash forecasts are consistently wrong, or you do not have one, you cannot see problems coming. Missing by more than a few percent at a one-week lead time is a signal to investigate. See how to measure and improve cash forecast accuracy.
Check: forecast versus actual, and bias.
A scorecard
A simple monthly scorecard helps turn the list into action. Color-code each item against thresholds you define.
| Sign | Metric | Green | Amber | Red |
|---|---|---|---|---|
| 1 | DSO change vs. 6 months ago | Flat or down | Up 1 to 4 days | Up 5 or more days |
| 2 | Inventory growth minus sales growth | Below 0 | 0 to 10 points | Above 10 points |
| 3 | DPO minus agreed terms | 0 or below | 1 to 5 days | Above 5 days |
| 4 | Credit line utilization at month-end | Under 40% | 40% to 70% | Above 70% |
| 5 | Weeks of 13 below minimum cash | 0 | 1 to 2 | 3 or more |
| 6 | Operating cash flow / net income (trailing 12 months) | Above 0.8 | 0.3 to 0.8 | Below 0.3 |
| 7 | Gross margin vs. 12 months ago | Flat or up | Down under 1 point | Down 1 point or more |
| 8 | Top 5 customer share of past-due balances | Under 20% | 20% to 40% | Above 40% |
| 9 | Suppliers tightening terms | None | One or two | Several |
| 10 | Forecast bias at 1-week lead | Within 3% | 3% to 8% | Above 8% |
The thresholds are examples. Calibrate them with your own history. Review the scorecard monthly, and discuss all ambers and reds.
When one sign hides another
Metrics can offset each other, which is why you need several. Consider a hypothetical company with annual sales of $3,600,000 and cost of goods sold of $2,160,000. Over a year, DSO rises from 38 to 46 days, DIO from 55 to 68 days and DPO from 31 to 44 days.
- Daily sales = $9,863. Higher DSO ties up 8 × $9,863 = $78,904 more cash in receivables.
- Daily COGS = $5,918. Higher DIO ties up 13 × $5,918 = $76,934 more cash in inventory.
- Higher DPO releases 13 × $5,918 = $76,934 by paying suppliers later.
Net cash absorbed by working capital = $78,904 + $76,934 - $76,934 = $78,904.
On the surface, the damage looks modest. But look at the parts: the company has absorbed $155,838 in receivables and inventory, and has covered almost half of it by paying suppliers 13 days later than before. If suppliers tighten terms or demand payment, the hidden $76,934 comes due. The cash conversion cycle moved from 62 days (38 + 55 - 31) to 70 days (46 + 68 - 44), a modest-looking 8-day change that conceals a 21-day deterioration in receivables and inventory days combined. See the cash conversion cycle.
What to do first
- Build or refresh the 13-week forecast. It shows how much time you have. See how to build a cash flow forecast you will actually use.
- Measure the days metrics and compare them with 6 and 12 months ago.
- Look at the aging reports for receivables and payables. Contact the largest past-due customers and align with key suppliers.
- Review inventory by item class for excess and slow-moving stock.
- Check financing headroom, covenants and renewal dates.
- Set a minimum cash level and write down what you will do if you approach it. See how to build a cash preservation plan before you need one.
- Assign owners for each red or amber sign.
Fixes by sign
| Sign | First moves |
|---|---|
| Rising DSO | Fix invoice quality, follow up earlier, resolve disputes. See how to speed up accounts receivable collections |
| Growing inventory | Clear excess, reset forecast and order policies. See demand planning and inventory optimization |
| Stretched payables | Agree plans with suppliers; negotiate terms rather than stretching |
| Heavy credit line use | Forecast peak; right-size or restructure funding. See working capital loans vs. lines of credit |
| Low cash cushion | Build a reserve. See how much cash reserve should a business hold? |
| Profit without cash | Examine working capital growth, capital spending and debt payments |
| Margin slippage | Review pricing, discounts and costs |
| Customer concentration | Diversify, tighten credit on the largest, monitor |
| Supplier tightening | Meet suppliers early, share forecasts, show payment plan |
| Forecast misses | Fix inputs and track accuracy |
Treasury discipline helps catch problems early
Many early warnings are visible to a company that tracks cash daily, forecasts weekly and has clear controls. If you lack that foundation, start with the routines in treasury management basics for growing companies. Even a simple daily cash report and a weekly forecast will surface several of these signs before they become urgent.
Build the habit
The signs are easy to monitor if they are part of a routine. Put the scorecard on your monthly finance agenda, with a short weekly cash review in between. A dashboard with the key measures is described in the cash flow dashboard. The aim is to see changes early enough that you have options.
Common mistakes
- Waiting for the bank balance to fall.
- Reading one metric in isolation.
- Treating stretched payables as a solution.
- Ignoring seasonality when comparing months.
- Setting no thresholds, so nothing looks like a problem.
- Failing to assign owners.
FAQs
What are the early warning signs of cash flow problems?
Rising days sales outstanding, growing inventory, stretched payables, heavier use of credit, a cash balance near the minimum, negative operating cash flow despite profit, slipping margins, late payments from key customers, tighter supplier terms and forecasts that keep missing.
Why does a profitable company run out of cash?
Because profit includes sales not yet collected and costs of goods not yet sold, while cash is consumed by receivables, inventory, capital spending and debt payments.
How early can I spot a cash problem?
Often months ahead. Trends in days metrics and the 13-week forecast show developing gaps well before the bank balance does.
What should I do first if I see warning signs?
Build a current 13-week forecast, review aging reports, talk to key customers and suppliers, and prepare options for funding or cost control.
Is it a problem to use the credit line regularly?
Not necessarily. Seasonal use is normal. It becomes a warning sign when utilization rises over time and does not come down in strong months.
Keep reading
- Complete guide: Cash Flow Management: The Complete Guide for Growing Businesses
- How to Build a Cash Preservation Plan Before You Need One
- Treasury Management Basics for Growing Companies
- How Much Cash Reserve Should a Business Hold?
- Related topic: Demand Planning and Inventory Optimization: The Complete Guide
This article is for general information. It is not accounting, tax, legal or investment advice, and examples use illustrative numbers rather than client data. Confirm decisions that carry financial or legal consequences with a qualified professional.