Working Capital & the Cash Conversion Cycle

Imagine running a shop. Before a single customer walks in, money has already left your hands: you bought stock. After the customer walks out, if you sold on credit, the money still has not come back. Meanwhile your own supplier has given you thirty days to pay, so part of that stock was effectively funded by them. What is left over — the bit you funded yourself — is your working capital.

In accounting terms it is current assets minus current liabilities: things that will turn into cash within a year, less what must be paid within a year. For analysis, the narrower operating definition is more useful, because it strips out cash and short-term borrowing and leaves only the trading items you can actually manage.

The number matters because it is not free. Every rupee locked in stock or in an unpaid invoice was funded by somebody — the company's own past profits, its bank, or its suppliers. Working capital is the interest-bearing cost of standing still, and a business that lets it drift upward is slowly borrowing more to sell the same amount.

Because profit is recorded at the moment of sale, while cash arrives whenever the customer chooses to pay. In between sits the working capital gap, and the faster a business grows, the wider that gap becomes in absolute terms.

Consider the sequence. A distributor wins a large new customer. It buys stock now, holds it for two months, sells it, and waits three months for payment. Its supplier gave it one month of credit. The profit on that transaction is booked the day the goods ship. The cash from it arrives four months after the money went out. Multiply that by a doubling order book and the company is profitable and insolvent at the same time — which is exactly how a growing business fails.

This is also the mechanism behind what the cash flow statement topic in this module calls the working capital block: the reason operating cash flow can sit far below reported profit for years without a single accounting irregularity. Nothing is being misstated. The money is simply somewhere other than the bank.

Days Inventory Outstanding answers one question: on average, how long does a unit of stock sit in the business before it is sold? It converts the inventory balance on the balance sheet into a number of days, which makes it comparable across years and across companies of different sizes.

Use average inventory rather than the closing figure — opening plus closing, divided by two. A single year-end snapshot can be distorted by a seasonal build or a deliberate run-down before the balance sheet date. Use cost of goods sold in the denominator, not revenue, because inventory is carried at cost and matching a cost balance against a selling-price flow inflates nothing consistently.

Rising inventory days can mean two very different things. Stock is not selling — the bad reading. Or the company is deliberately building ahead of a launch, a season, or an expected input price rise — the benign one. The management discussion in the annual report and the segment mix usually tell you which, and if neither explains it, the question stands.

Days Sales Outstanding measures how long customers take to pay after the sale is booked. It is the most sensitive of the three metrics, because it moves for reasons that are almost always worth understanding.

Revenue is the right denominator here, since receivables are recorded at selling price. Where a company discloses it, use revenue including indirect taxes to match the invoice value actually owed — but consistency across years matters more than precision in any one year.

Receivable days creep upward for a short list of reasons, and they are not equally benign. The customer mix has shifted toward larger buyers with more bargaining power, who dictate longer terms. The company has extended credit to weaker buyers to hold volume in a slowing market. Collections have simply deteriorated. Or revenue was recognised on shipments that the customer has not really accepted. The first is a structural change; the last is a serious accounting question. Reading the receivables ageing note, which splits what is owed by how overdue it is, is what separates them.

Days Payable Outstanding measures how long the company takes to pay its own suppliers. Mechanically it is the mirror of receivable days, and it works in the company's favour: every day it delays payment is a day of free funding.

Purchases is the theoretically correct denominator, but Indian filings rarely disclose purchases cleanly, so cost of goods sold is the standard practical substitute. Whichever you choose, use it every year.

The subtlety is that a high or rising DPO is not automatically good news, even though it shortens the cycle. There is a version where it reflects genuine bargaining power: a large buyer with scale that suppliers want to serve. There is another version where the company is short of cash and is simply paying late, which shifts the strain onto smaller suppliers, invites price increases at the next negotiation, and can end with supply being pulled at the worst possible moment. The two look identical in the ratio and completely different in the business.

Two disclosures help tell them apart. Listed companies report amounts overdue to micro and small enterprises under the MSME disclosure requirement, and a growing balance there is a strong hint that late payment is stress rather than strategy. Supply chain finance arrangements, where a bank pays the supplier early and the company settles later, also stretch DPO while quietly converting trade credit into borrowing.

Put the three together and you get the number of days between paying cash out for material and receiving cash in from the customer. Inventory days and receivable days extend that gap; payable days shorten it, because the supplier is funding part of it.

The result is expressed in days, which is what makes it powerful. It is size-neutral, so a mid-cap and a large-cap in the same sector can be compared directly. It is also directly convertible into money: a company with a ninety-day cycle has roughly a quarter of its annual trading costs permanently tied up, and every extra day adds another slice.

What the cycle does not capture is the cost of funding those days. Two companies with identical cycles can have very different economics if one funds the gap with its own retained profits and the other with a working capital loan repriced every year. Read the cycle alongside short-term borrowings and interest cost — the debt and leverage topic in this module covers the funding side.

Take Konkan Kitchenware Ltd (figures illustrative throughout; this is not a real company). It makes small appliances and sells through distributors. For the year it reported revenue of ₹1,200 crore and cost of goods sold of ₹840 crore. Inventory opened at ₹200 crore and closed at ₹240 crore; receivables opened at ₹160 crore and closed at ₹200 crore; payables opened at ₹130 crore and closed at ₹150 crore.

Inventory days work out to average inventory of ₹220 crore divided by ₹840 crore of cost, multiplied by 365 — about 96 days. Receivable days are average receivables of ₹180 crore over ₹1,200 crore of revenue, times 365 — about 55 days. Payable days are average payables of ₹140 crore over ₹840 crore, times 365 — about 61 days.

The cycle is therefore 96 plus 55 minus 61, or roughly 90 days. Three months pass between the company's money going out and coming back. In balance sheet terms that is inventory of ₹240 crore plus receivables of ₹200 crore less payables of ₹150 crore — ₹290 crore of core working capital that has to be funded before the business earns anything at all.

A negative cycle means the company gets paid before it has to pay. Its customers fund its working capital instead of the other way round, so growth releases cash rather than consuming it. It is one of the most powerful structural advantages a business model can have, and it is a property of the model rather than of management skill.

The models that achieve it share one shape: they sell for cash or near-cash and buy on credit. Organised retail is the classic case — a customer pays at the till, the supplier is paid weeks later, and stock turns fast enough that inventory days stay short. Quick-commerce and food delivery platforms push this further, since the payment is collected at order time. Subscription software collected annually in advance is the same idea in a different industry. So, in effect, is a listed exchange or depository, where fees are collected up front and there is barely any inventory at all.

The consequence is worth spelling out. A business with a negative cycle that doubles its revenue generates cash from the growth itself, which is why such models can expand aggressively without repeatedly returning to lenders or shareholders. The risk sits elsewhere: because the model is funded by suppliers and customers, a sudden slowdown reverses the flow, and the cash that growth released has to be given back.

The cash conversion cycle deteriorates before profit does, and that lag is the entire reason to track it.

Think about the order in which trouble shows up. Demand softens first, but a company does not cut production immediately, so stock builds — inventory days rise. To hold volume, credit terms are eased or sales are pushed to weaker buyers — receivable days rise. Revenue and profit still look fine at this stage, because the sales were made. Only later, when the stock has to be discounted and the receivables have to be provided for, does the damage reach the income statement. By then the market has usually noticed.

Track the cycle as a series across five to seven years rather than as a level. A cycle drifting up by ten or fifteen days a year, with no change in business mix to explain it, is a real signal even while every headline number is still improving. Match it against the profit-versus-operating-cash divergence described in the cash flow statement topic — a widening cycle and a widening cash gap are the same fact seen from two statements, and seeing both is much stronger than seeing either.

Not all revenue growth costs the same. The distinguishing question is what happens to the cycle while revenue rises.

Stay with Konkan Kitchenware. It funds ₹290 crore of core working capital on ₹1,200 crore of revenue. Suppose revenue grows 25 per cent next year to ₹1,500 crore and the cycle stays exactly where it is at 90 days. Working capital scales with the business, so it rises to roughly ₹363 crore — about ₹73 crore of cash absorbed during the year purely to keep trading at the larger size. That has to come from operating cash flow, from a lender, or from shareholders, and it is spent before a rupee of the extra profit is available for anything else.

Now suppose the same 25 per cent growth comes with the cycle tightening from 90 days to 72 — better collections and faster stock turns. Working capital lands back at roughly ₹290 crore. The growth has funded itself. Same revenue, same profit, and a completely different cash outcome for the shareholder.

This is why two companies growing at identical rates can deserve very different treatment. Growth that shortens the cycle compounds; growth that lengthens it is being bought, and the price is showing up in the borrowings line rather than in the income statement.

A cycle of 120 days is unremarkable for a jeweller, where gold sits on the shelf until someone buys it, and would be alarming for a quick-service restaurant, where the raw material spoils in days. There is no universal good number, and any figure quoted as a benchmark without a sector attached is not usable.

Two comparisons are legitimate. The first is against genuinely comparable peers: the same sector, similar customer type, similar position in the value chain. A company selling to government departments and one selling to private industrials are not comparable on receivable days even inside the same industry, because the payment behaviour of the customer differs structurally. The second, and the more useful of the two, is against the company's own history, since it holds the business model constant and isolates what actually changed.

Watch for one distortion in year-on-year comparisons: a year-end snapshot can be managed. A push to collect in the last fortnight of March, or a decision to delay a supplier run past the 31st, improves the closing balances without changing anything about how the business ran. Using average rather than closing balances dampens this, and reading four quarters rather than one year-end removes most of what is left.