The short answer
A business can show a profit and still run out of cash, because customers pay slowly and expenses arrive in lumps. A rolling 13-week cash flow forecast, faster collections and a small reserve remove most surprises.
Key takeaways
- Profit and cash flow are different; cash pays the payroll.
- Update a 13-week forecast every week so you see a shortfall six weeks ahead, not six days.
- Invoice on delivery, set clear terms and follow up on the due date.
- Use a line of credit for short timing gaps, not to cover a structural problem.
Why profitable businesses still struggle
A business can show a healthy profit on paper and still run out of cash. Customers pay slowly, expenses arrive in a lump, inventory has to be bought before it sells, and growth uses cash before it produces any. Profit and cash flow are different measures, and the second one pays the payroll.
The good news is that cash flow responds to habits more than to luck. A handful of routines, applied consistently, remove most surprises.
Build a 13-week cash flow forecast
The most useful habit is a rolling 13-week forecast. It is not a profit-and-loss statement. It is a week-by-week projection of cash coming in and cash going out.
- List your opening cash balance.
- Project weekly receipts from invoices, sales and other sources.
- List weekly payments: payroll, rent, suppliers, taxes, loan payments.
- Calculate the ending balance for each week and carry it forward.
Update it every week with real numbers. The value is not precision; it is seeing a shortfall six weeks ahead instead of six days ahead, when you still have options.
Accelerate receivables
Money owed to you is an interest-free loan you are giving customers. Shorten it.
- Send invoices the day work is delivered or completed.
- Set clear payment terms such as net 15 or net 30, and put them in the contract.
- Follow up on the due date, not two weeks later.
- Consider a small early-payment discount if cash is tight.
- For larger projects, bill in milestones rather than at completion.
- Make it easy to pay: online payment links, ACH and card options.
Track how many days, on average, it takes customers to pay. If that number is rising, it is an early warning.
Stretch payables intelligently
On the payables side, negotiate terms with suppliers. If you are on net 30, ask whether net 45 or net 60 is possible, especially if you have paid reliably for a year. Pay on the last day terms allow, not early, unless there is a discount that is worth more than holding the cash.
Never stretch payables to the point of damaging supplier relationships or your commercial credit. The goal is to use the terms you have earned, not to pay late.
Control inventory and fixed costs
Inventory is cash sitting on a shelf. Identify slow-moving items and stop reordering them. For items that sell well, match order sizes to your forecast rather than to supplier minimums when possible.
Review recurring costs quarterly: subscriptions, insurance, software and leases. Small recurring costs rarely get a second look, and together they can be significant.
Keep a cash reserve
A reserve that covers a few weeks of fixed costs changes how a slow month feels. Build it gradually: set a target, then move a small percentage of each deposit into a separate account until you reach it. Even a modest cushion reduces how often you need outside financing at a bad moment.
Using a line of credit correctly
When you do need outside capital to bridge a gap, a business line of credit is often the most efficient tool. You draw funds when receivables lag, then repay as collections come in, and you pay interest only on the balance you use.
The right use is short-term timing gaps. If a line stays fully drawn month after month, it is no longer a bridge; it is covering a structural problem, and a different fix is needed. A line is also easiest to arrange before you urgently need it, so consider setting one up while your finances look strong.
lendfloCapital offers working capital options and lines of credit matched through one short application, with no cost to apply.
lendfloCapital
Ready to put this knowledge to work?
Tell us about your business and a lendfloCapital advisor will review your options and walk you through what fits.
Frequently asked questions
How do you make a 13-week cash flow forecast?
List your opening balance, project weekly receipts, list weekly payments such as payroll, rent, suppliers, taxes and loan payments, then calculate and carry forward the ending balance for each week. Update it weekly with real numbers.
Why do profitable businesses run out of cash?
Customers pay slowly, expenses arrive in a lump, inventory has to be bought before it sells and growth uses cash before it produces any.
When should a business use a line of credit?
For short-term timing gaps, such as bridging late receivables. If a line stays fully drawn month after month, it is covering a structural problem and a different fix is needed.
