Cash Flow for Small Business

Why a profitable business can still run out of money, and how to manage the timing gap that causes it.

A business can be profitable on paper and still fail, if it runs out of actual cash before that paper profit arrives as real money in the bank. This gap between profit and cash is one of the most common reasons small businesses fail.

Cash flow versus profit

Cash flow is the actual movement of money in and out of a business, tracked by when it happens, not when a sale is recorded. Profit measures whether a business made money over a period; cash flow measures whether it had enough money on hand at every point along the way to keep operating. A business can show a profit for the month and still be unable to pay rent, if the money from that month’s sales hasn’t actually arrived yet.

Where the gap comes from

Accounts receivable is money owed to a business by customers who have already been billed but haven't paid yet. A contractor who completes a $10,000 project and bills a client with 60-day payment terms has recorded $10,000 in revenue immediately, but won't see that cash for two months - during which payroll, materials for the next job, and rent still have to be paid out of whatever cash is actually on hand.

The cash flow gap and how businesses manage it

The cash flow gap is the period between when a business has to pay its own costs and when it actually collects payment from its customers. Common ways to manage it include requiring a deposit upfront rather than full payment on delivery, negotiating longer payment terms with suppliers to match the terms given to customers, and keeping a cash reserve specifically sized to cover this gap rather than relying on it closing on time every cycle.

Runway: how long the cash actually lasts

Runway is the amount of time a business can continue operating at its current rate of cash spending before running out of money, assuming no new cash comes in. Tracking runway matters even for a profitable-looking business, because it answers a different, more urgent question: not “are we making money,” but “do we have enough cash to survive until the money we’re owed actually arrives.”

Checking the bank balance instead of tracking cash flow forward

A healthy bank balance today doesn't guarantee enough cash next month, especially with large payments - payroll, a supplier invoice, a loan payment - due before expected customer payments arrive. Cash flow needs to be projected forward, not just checked in the present, to catch a coming shortfall while there's still time to act on it.

Why this connects to the rest of this module

Cash flow management becomes even more important once a business starts marketing for growth and considering its first hire, covered in the next two lessons - both of which add new, often front-loaded costs before the additional revenue they’re meant to generate has arrived.

Key takeaways

Cash flow tracks money by timing; profit tracks it by period - a business can be profitable and still short on cash.
Accounts receivable is revenue already recorded but not yet actually collected.
The cash flow gap can be managed with deposits, supplier terms, and a reserve sized to cover it.
Runway measures survival time on current cash, a different and more urgent question than profitability.