Working capital

A specialty-chemicals maker earns a profit every year, grows steadily, keeps healthy margins and a full order book. On every line of the profit-and-loss account it is doing well. And yet, in the year it grows fastest, its cash in the bank goes down, its borrowings go up, and it takes on more debt in its best year. illustrative

The part that sounds impossible is that this did not happen because the company lost money. It happened because it made more of it. The faster it grew, the tighter its cash became.

Profit and cash are not the same thing, and the gap between them - quarter after quarter - is mostly one thing: working capital, the cash a business must tie up just to keep running from one day to the next. There is a single number that measures it: how long the business has to fund itself between the day it pays for what it sells and the day it finally gets paid. That number is a strength in one industry and a warning in another. Understand it and you understand why profitable companies go bankrupt. Miss it and every growth story looks like nothing but good news.

To see where the cash goes, follow the cash. The manufacturer buys raw material and pays for it. The money is gone, but the goods are not sold; they sit as stock. The average number of days goods sit before being sold is inventory days. Then the goods sell - but a sale on credit does not put cash back straight away. It becomes a trade receivable, money the customer owes but has not handed over, and receivable days measure how long that takes. From the day cash went out to the day it comes back, the company has been out of pocket for inventory days plus receivable days. That stretch is the operating cycle.

One thing works in its favour. The company does not pay its own suppliers instantly either; it takes credit, and the average number of days it takes to pay is payable days. Supplier credit funds the front of the cycle for free. Subtract payable days from the operating cycle and what remains is the cash conversion cycle: receivable days plus inventory days minus payable days. In plain terms, the number of days a business funds its own operations out of its own pocket.

Now the part that matters most. Take that gap in days and multiply it by how much cash flows through the business each day, and you get the money tied up, in rupees. When the cycle is positive, every extra rupee of sales needs its own slice of stock and receivables funded before the cash from that sale comes back. Grow sales 40% and you need roughly 40% more working capital, in advance, out of retained profit or borrowing. That is how a profitable company grows itself straight into a cash squeeze - not despite doing well, but because it is. A profitable business can run itself out of cash, and cash is the thing you cannot run out of and survive.

The cash conversion cycle is computed identically in every company, but the answer varies so much across industries that the number ends up meaning genuinely different things. The sign flips, the size swings from days to months, and in one case the answer does not exist at all. Here is the same cycle across four businesses on one axis.

The QSR flip is a real inversion, not a matter of degree: the identical formula returns an opposite-signed answer, and the opposite sign carries the opposite consequence for growth. The EPC case teaches the other half of the lesson - that the reason matters more than the number. A receivable figure near 140 days that would signal disaster in an FMCG company is simply how contracting works, because a slice of every bill is retention the customer may withhold until the job is done. And the bank breaks the concept entirely: this is structural, not magnitudinal. A lender holds no inventory and runs no operating cycle of paying suppliers and collecting from customers; its deposits are its raw material and its loans its product. Force the working-capital formula onto a bank and you get a number that means nothing. You judge a lender on net interest margin, bad loans and the maturity profile instead.

Take the composite specialty-chemicals maker: ₹4,520 crore of revenue, ₹2,667 crore of cost of goods, inventory at 70 days, receivables at 55, payables at 45. illustrative

The cycle is 70 + 55 − 45 = 80 days. Turn the days into rupees. Receivables are 4,520 × 55 ÷ 365 ≈ ₹681 crore; inventory is 2,667 × 70 ÷ 365 ≈ ₹511 crore; supplier credit funds 2,667 × 45 ÷ 365 ≈ ₹329 crore. So 681 + 511 − 329 ≈ ₹863 crore is locked inside the operating cycle - earning nothing, usable for nothing else.

Now grow the business 40% and hold the cycle the same length. Working capital climbs roughly in step, from about ₹863 crore to about ₹1,208 crore - an extra ₹345 crore to fund this year, before the new sales have fully turned into cash. That ₹345 crore comes from retained profit or from new borrowing. This is exactly why the fastest-growing year is the tightest year for cash, and why a happy profit line can sit right next to falling cash and rising debt.

What would change the conclusion? A genuinely tighter cycle - collecting faster or holding less stock - shrinks the funding growth needs. But watch how the cycle falls. If it falls only because the company started paying suppliers later, the improvement was borrowed from those suppliers and can be taken back the moment they tighten terms. The slider below makes the mechanism live: move the three days, watch the gap open and close in days and rupees, then switch sectors - the QSR preset drives it negative, the EPC preset past a hundred, and the bank preset has no cycle to compute and says so.

When cash lags profit, an analyst goes straight at the cycle: "Your cash conversion cycle stretched to 95 days from 80. Is that structural, or a one-off?" What they are really asking is whether the business is getting permanently harder to fund or just had a timing wobble.

A good answer decomposes it: "About 10 of the 15 days is a genuine mix shift - we've grown the export book, which runs longer receivables at better margins, and we're comfortable holding that. The other 5 is inventory built ahead of the new plant's qualification runs, and it unwinds by Q3. Cycle settles around 88 to 90 at the new mix. Net-net, more cash tied up, earning a better margin on it." A cause for each part, a landing number, and an honest admission that the cycle is structurally a touch higher.

An evasive answer sounds just as fluent: "Working capital is always a bit seasonal and we manage it tightly. On a full-year basis it normalises, and our focus remains on profitable growth. I wouldn't read too much into one quarter." This is not a strawman - real managements give exactly this, and "seasonal" is even partly true. What makes it evasive is what it omits: it never says what receivable, inventory or payable days actually did, it redirects to "profitable growth" (a different question), and it offers no number to hold it to next quarter.

The follow-up that settles it: "Split the 15-day increase into receivable, inventory and payable days, and tell us how much reverses by Q3." That forces the vague answer into its three parts, and in particular exposes whether the cycle only held together because payable days were stretched. Watch what happens when nobody asks it. If "it normalises over the year" is allowed to stand, the silence is the tell - either the split is unflattering, or the analysts who would have pushed have already stopped following the company.

The cash conversion cycle tells you how much cash the day-to-day rhythm of the business ties up. It does not tell you whether that cash is well spent, nor whether the receivables inside it are real. A company with a low, healthy-looking cycle whose receivables will never be collected is worse than one with a longer cycle of sound, collectible bills. The number cannot see the quality of what sits inside it - a genuine sale and a sale stuffed into a distributor who cannot resell it both show up as the same receivable.

It is also blind to the deliberate stretch. A company can make its cycle look better for several quarters simply by paying suppliers later; that flatters operating cash for a while, strains the supply chain, and stores up a reversal. A falling cycle is only worth cheering once you know it fell because receivables and inventory came down - not because vendors were dragged out.

Two further traps ride alongside. The first is reading profit as cash: a positive-cycle business can post a rising profit line and falling cash at the same time, and growth widens the gap rather than closing it. The second is benchmarking days across sectors: 140 receivable days is normal retention in EPC and channel-stuffing in FMCG; the figure means nothing until you know what is normal for that sector. And as the bank showed, the whole idea does not travel to lenders and insurers - using it there is not a weakness of the metric but a misuse of it. The cycle is a powerful first read of how a business funds itself, but like every number in this part of the guide, it earns your trust only once you can see what is inside it.