| Key takeaways Profit is not cash. Profitable businesses fail when they run short of cash at the wrong moment. Your bank balance shows today; a forecast shows what’s coming: payroll, VAT, suppliers, late payers. A rolling 13-week cash flow forecast is the practical standard for active cash management. Forecasting is a growth tool: it lets you model hiring, stock and expansion before committing. |
Here’s one of the most counter-intuitive truths in business: profitable companies go under all the time, not because they weren’t making money on paper, but because they ran out of cash at the wrong moment. Profit is an opinion formed over a year. Cash flow is a fact you live with every week.
Why do profitable businesses run out of cash?
Because profit is measured over time while cash must be available right now. Late-paying customers, a month-end VAT bill, payroll and large once-off outflows can leave a profitable business short of cash at a critical moment. Cash-flow pressure is widespread: research by accounting platforms such as Xero has found that a majority of South African small businesses face cash-flow strain in a given year.
What’s the difference between my bank balance and my cash flow?
Your bank balance tells you where you are today; your cash flow tells you what’s coming. The balance says nothing about Friday’s supplier run, the VAT due at month-end, salaries on the 25th, or the client who always pays 30 days late. A balance that looks healthy this morning can be committed three times over by next week.
What is a cash flow forecast?
A cash flow forecast is a forward view of the money expected to move into and out of your business over a future period, showing your projected balance so you can spot shortfalls before they happen. A popular, practical version is the 13-week cash flow forecast, a rolling three-month window, near enough to be accurate and far enough to be useful. For each week you map:
- Money in: expected customer payments, on realistic timing.
- Money out: salaries, suppliers, rent, loan repayments, VAT and provisional tax.
- Running balance: so you can see, in advance, any week you’d dip too low.
How does cash flow forecasting help a business grow?
It turns big decisions from guesses into modelled scenarios: Can we afford to hire? When should we buy that equipment? Can we take this big order without choking our cash? What if a key client pays a month late? You can model it before committing real money. That’s the difference between growth that’s planned and growth that’s gambled.
This is also where good accounting stops looking backwards. Recording what happened is compliance; helping you see and shape what happens next is advisory, and it builds directly on accurate monthly books. For a primer on the basics, see this Xero cash flow guide.
Frequently asked questions
What is a cash flow forecast?
A forward view of the money expected to flow into and out of your business over a future period, showing your projected balance so you can spot and prevent shortfalls.
What is a 13-week cash flow forecast?
A rolling three-month forecast of weekly cash inflows and outflows, long enough to plan ahead, short enough to stay accurate. It’s a popular standard for active cash management.
Why do profitable businesses still run out of cash?
Because profit is measured over time while cash must be available now. Late payments, tax bills and large outflows can leave a profitable business short at a critical moment.
How can an accountant help with cash flow?
Beyond recording the past, an accountant can build and maintain your forecast, model scenarios like hiring or expansion, and flag risks early, turning numbers into forward-looking decisions.
Let’s turn your numbers into a plan…
At Zen Accountants in Pretoria, we go beyond compliance: building and maintaining cash flow forecasts, modelling the big decisions before you make them, and helping you approach growth with clarity instead of guesswork.
Book a free advisory call and let’s build your forward view.
About the author: Zen Accountants is a Pretoria-based accounting, tax and advisory practice serving SMEs across South Africa. This article is general information, not personalised financial advice. Every business’s cash position is different.
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