Cash flow versus profit, and the one weekly number to watch

A founder pulling $2.4M in revenue at a 62% gross margin told me last month that she could not figure out why her bank balance kept slipping. Her P&L showed a healthy profit. Her accountant agreed. And yet cash was down $180,000 over the quarter.

The answer was sitting in working capital. Accounts receivable had grown by $210,000 while she was landing bigger clients on net-60 terms. Profit was real. Cash just had not arrived yet.

If you look at only one cash number a week, make it this one: operating cash flow, computed as net income plus depreciation, minus the change in AR, minus the change in inventory, plus the change in AP. That single line tells you whether the business is self-funding or leaning on the line of credit.

Some signs the gap is widening:

• AR days climbed from 32 to 48 in a single quarter.
• A new customer segment is paying on net-60 or net-90.
• Inventory is building ahead of a launch that slipped a month.
• You added a seat or a retainer that invoices monthly but the work started two weeks ago.

None of those things show up on the P&L in a way that shocks you. They all show up in the bank balance.

The weekly rhythm: pull a two-line report every Monday with the bank balance and the AR aging summary. If AR is growing faster than revenue for three weeks in a row, that is your signal to call the top three late accounts personally. Do not delegate it. A phone call from the founder collects in a week what a dunning email collects in a month.

None of this is new. The reason founders miss it is that profit feels like proof of health, and cash feels like a plumbing problem. It is not. Cash is the business. Profit is an accounting opinion about the business.