Why the 13-Week Cash-Flow Model Is My Favourite Tool

Profit is an opinion; cash is a fact. I have watched profitable companies stumble because their working capital cycle quietly starved them of liquidity.

The 13-week cash-flow forecast solves this. It is short enough to be accurate, long enough to spot trouble, and granular enough to force real conversations about receivables, payables, and timing.

How I build it:

- Start with the bank balance, not the P&L. Cash forecasting begins from reality. - Model receipts by customer and cohort, not a blended assumption. Your largest client paying five days late can swing an entire week. - Separate committed outflows (payroll, rent, debt service) from discretionary ones. This is where you find your levers in a crunch. - Roll it every single week. A static forecast decays fast; a rolling one compounds in value.

The payoff is not just avoiding a cash crisis — it is the confidence to invest, hire, and negotiate from a position of clarity.