Understanding cash flow: the number that keeps your business alive

Profit tells you whether your business model works. Cash flow tells you whether your business survives. A profitable business can still fail — if the money it earns arrives too slowly, or if expenses land before revenue does, the gap between the two can be fatal.

Understanding your cash flow position does not require complex modelling. It requires knowing when money comes in, when money goes out, and what the gap between the two looks like over the next ninety days.

Cash flow versus profit

The simplest way to understand the difference: profit is an accounting concept. Cash flow is a reality. If you invoice a client for $10,000 in June but they do not pay until August, that revenue appears on your June profit and loss — but it is not in your bank account in June. Cash flow captures this timing.

This is why many profitable businesses experience cash flow pressure. Seasonal slowdowns, late-paying clients, or large up-front expenses can all create periods where the bank account is under stress even when the business is fundamentally sound.

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A profitable business can still run out of cash. Timing is everything.

A simple cash flow habit

Once a week, look at your cash position and run a thirty-day projection. What invoices are outstanding, and when are they likely to be paid? What bills are due in the next thirty days? The difference between those two figures is your thirty-day cash position.

Doing this consistently — even for fifteen minutes — means cash flow surprises become much rarer. You see the pressure coming weeks before it arrives, which gives you time to act: follow up overdue invoices, defer a non-urgent expense, or arrange a short-term facility with your bank.