Why a food manufacturer's cash runs on different timing than its profit — how raw materials, work in progress, supplier terms, and receivables move money, and how to build a 90-day forecast you can act on.
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After this you can read your operation's cash the way a manufacturer has to — as timing, not just totals. You will be able to see where your money sits between paying a supplier and getting paid by a customer, put a number on how long it stays there, and build a 90-day forecast that tells you which week runs tight before it happens.
These are two different questions, and a manufacturer feels the gap between them harder than almost any other kind of business. Profit is earned the moment you ship a batch and book the sale. Cash is a separate clock: it left your account weeks earlier to buy ingredients, and it does not come back until a customer actually pays. A batch can be profitable on paper while the bank balance behind it is empty.
Take the barbecue sauce maker from the true-COGS lessons: a 200-jar batch that costs about $450 to make. The day that batch runs, the cash for tomato paste, jars, labor, and the room is already gone. The jars then sell over the following weeks. Sell them wholesale on terms and the money lands another month after that. Profit says the batch earned its margin; cash says that margin is tied up for two or three months before a dollar of it is spendable again.
That tied-up money has a name. Your is the real constraint a growing manufacturer runs into. Grow faster and it grows with you: more batches in flight means more cash sunk into inventory and receivables at once. This is the paradox that catches profitable operations — the busier and more profitable you get, the more cash the growth swallows.
Follow one dollar through the operation and you can see the four places it gets stuck along the way. Each is cash you have already committed and cannot spend until the stage after it clears.
The point of laying the four out is that cash only comes back at the very end of the line, and the whole line has to be funded in the meantime. A resale shop has one short stop — buy a finished good, sell it. A manufacturer funds four stops in a row, every batch, all the time.
The one thing that eases the squeeze is that you usually do not pay your suppliers the instant they deliver. Most of them extend you credit through . Terms are half of every purchase, and they are negotiable. The common patterns below are illustrative — confirm the exact terms on each supplier's own invoice, because they vary by supplier and by your history with them:
Here is where a manufacturer's cash gets genuinely hard to hold in your head. It is not the size of any one bill; it is the count and the timing. String together a dozen suppliers, some on net terms and some on deposit-and-balance tranches, each with a few open invoices, and you are quietly carrying dozens of separate payment obligations — each landing on its own day, scattered across a three-to-four-month window. Operators who have mapped it out describe exactly that: not a handful of round monthly payments, but a long, uneven list of due dates that no monthly budget line ever captures.
An early-payment discount is expensive money to skip
Passing up "2/10 net 30" to hold your cash looks free, but it isn't. Forgoing the 2% to keep the money an extra 20 days — from day 10 to day 30 — costs 2 ÷ 98, about 2% for those 20 days. There are roughly 18 such 20-day stretches in a year (365 ÷ 20 ≈ 18), so on an annual basis that is north of 35%. If you have the cash, taking the discount usually beats almost anywhere else that cash could sit. If you don't, that is a signal about how tight the operation really is.
You can put a single number on all of this. The measures the gap the four stages create. The standard formula adds the time your cash is stuck in inventory and receivables, then subtracts the time your suppliers let you wait to pay:
Cash-conversion cycle = DIO + DSO − DPO
DPO is subtracted because those days are working in your favor: while your supplier waits for their money, they are funding part of the gap for you, so you have to cover that much less of it yourself.
Run the barbecue sauce maker through it with illustrative numbers. Say materials, WIP, and finished jars sit about 45 days on average before an order pulls them out the door (DIO = 45). The wholesale grocer buys on Net 30 but really pays around day 35 (DSO = 35). The maker's own ingredient suppliers are on Net 30, and they pay near day 30 (DPO = 30). Then:
45 + 35 − 30 = 50 days.
For 50 days, the cash behind every batch is out of the bank — spent, sitting somewhere in the line, not yet collected. Multiply that by every batch running at once and you can see why a busy month can leave the account thin. The number is also a map of your levers: shorten DIO by making to smaller, tighter runs instead of stockpiling; shorten DSO by invoicing the day you ship and chasing collections; lengthen DPO by negotiating longer terms — without stretching a supplier so far you lose the early-payment discount or the relationship. Move any of the three and the gap you self-fund shrinks.
A cash forecast is not a profit-and-loss statement. It ignores when things were earned and tracks only when money actually moves — in and out, by date, starting from the real balance in your account today. Ninety days is the useful horizon: long enough to see trouble coming, short enough to forecast honestly.
Start from today's real bank balance
Not the model's number, not last month's — the actual figure in the account this morning. Every week's projection builds forward from it.
Lay out cash going out, by the day it actually hits
List every obligation on its real due date: each supplier invoice at its net-terms date, each deposit and tranche on its scheduled day, plus payroll, rent, loan payments, and taxes. This is the step operators skip — lumping suppliers into one round monthly figure hides exactly the scattered, uneven due dates that sink the forecast.
Lay out cash coming in, by the day you'll really be paid
Enter each customer payment on the date you expect the money, not the date you shipped — invoice date, plus their terms, plus how late they usually run. Use your own collection history, not the terms on paper.
Roll the running balance forward week by week
Carry the balance across all thirteen weeks. Any week it dips toward zero or below is a week to act on now — pull in a receivable, move a discretionary purchase, or line up credit — while you still have room to choose.
The word doing the work is reality. A forecast built on the terms printed on invoices will lie to you, because the real world runs late and lumpy. Customers pay days or weeks after their terms say; a quality dispute turns one payment into a partial one you have to remember to enter; the cash for the batch you are making this week is already committed even though nothing has left the account yet. Every one of those has to be in the forecast, on the right day, or the running balance is fiction.
A forecast is only as honest as the obligations you enter into it
The gap that blindsides operations — the model says there is money and the account is empty — almost always comes from obligations that never made it into the model: an untracked partial payment, a supplier on terms nobody wrote down, cash buried in work in progress. The forecast is not wrong because the arithmetic failed; it is wrong because something real was left out of it. Closing that specific gap between the model and the bank balance is its own discipline, and the next lesson takes it on directly.
Do this in your operation