Why a profitable month can still leave you short

Two different questions

Profit answers: did this month's work create more value than it consumed?

Cash answers: how much money is actually in the account right now?

These sound like the same question. They are not, and businesses fail over the difference. A profitable company that runs out of cash stops operating just as completely as an unprofitable one.

Where the gap comes from

Three mechanisms, and almost every cash squeeze in a small business is one of them.

You sold it, but nobody has paid yet. The sale is recorded when you deliver, not when the money lands. If your customers pay on terms, this month's revenue is next month's cash. Growth makes this worse, not better: a fast-growing business funds a larger and larger gap between doing the work and being paid for it. This is the counter-intuitive one — growth consumes cash.

You bought it, but you haven't sold it yet. Money spent on stock leaves the bank immediately. It only comes back when the stock sells. Between those two moments, the value sits on a shelf. The profit is unaffected; the bank balance very much is not.

Some things leave the account without touching profit. Repaying the principal on a loan, buying equipment, paying tax on last year's earnings, an owner drawing money out. Each of these is real cash leaving, and none of them appears as a cost this month.

Meanwhile depreciation works in the opposite direction — a cost on paper with no cash moving at all.

The pattern to watch

The dangerous version is not one bad month. It is a profitable business where the gap between doing the work and being paid keeps widening while the gap between buying and paying keeps narrowing.

Your customers drift from paying in thirty days to paying in sixty. Your suppliers move you from sixty days to thirty. Nothing has gone wrong with the business — margins are fine, sales are up — and you are steadily starving. By the time it becomes visible in the bank balance, it has usually been building for months.

That is why cash needs watching on its own schedule, not inferred from the P&L once a quarter.

What to actually do

Look at cash weekly, profit monthly. Different questions, different rhythms. A short weekly look at what is coming in and going out over the next few weeks catches problems while they are still small.

Know your two numbers. How long, on average, between delivering and being paid — and how long between being invoiced and paying. If the first is larger than the second, your business is financing its customers. That may be fine. It should be deliberate.

Treat collections as an operating task. Not an awkward favour to ask. An invoice unpaid at ninety days is materially less likely to be paid at all, and the most effective intervention is a polite reminder before it is late, not after.

Plan for the non-profit outflows. Loan principal, tax, equipment. They are predictable. Being surprised by a predictable payment is a planning failure, not bad luck.

The point

Profit tells you whether the business model works. Cash tells you whether you will still be operating next month. You need both, and only one of them can be safely reviewed quarterly.