Manufacturing Cash Flow: Why Profitable Plants Still Run Out of Cash

The timing mismatch is structural. A plant buys material, pays labor and overhead, builds work in process, ships finished goods and then waits for the customer to pay, often 30 to 60 days or more. Growth makes it worse: every new order consumes cash before it produces any.

A company can show a healthy profit while its cash balance falls, which is why profit and cash are managed as two different problems.

The cash conversion cycle measures how many days cash is tied up between paying for inputs and collecting from customers: days of inventory on hand, plus days of receivables, minus days of payables. A plant that carries 60 days of inventory, waits 45 days to collect and pays suppliers in 30 days has a cycle of roughly 75 days.

Shortening any leg, inventory, collections or payables terms, shortens the cycle and reduces the cash the business must fund.

Inventory discipline is usually the biggest lever: faster turns on raw material, tighter work-in-process flow and finished goods that match demand. Collections follow, with clear terms and follow-through, and supplier terms and customer deposits can shift timing in the plant's favor.

Equipment and facility purchases should be timed against the cash forecast, because capital spending is the fastest way for a growing plant to convert a healthy balance into a cash crisis.

A rolling 13-week cash forecast tied to the production schedule, backlog and purchasing plan gives the plant an early view of coming peaks and valleys. It is updated weekly, not quarterly, and it is compared to actuals so the assumptions improve.

The forecast is the tool that lets an owner decide early: when to buy material, when to push collections, when to finance and when to hold back.