Working capital: the cash your business runs on.
Why profitable businesses run dry — and how smart companies make vendors fund them
The invoice was sent. Profit was booked. The bank account was empty.
A textile trader in Surat ships fabric every month. His order book is full. His mill wants payment now. His customers owe him money but haven't paid yet. In January, his bank account hits zero. Not because the business is failing — because the cash is stuck between an invoice sent and a cheque not yet received.
Working capital is a simple formula: Current Assets minus Current Liabilities. Current assets are things the business can convert to cash within a year — money in the bank, receivables from customers, stock in the warehouse. Current liabilities are bills due within a year — supplier invoices, short-term loans. The difference is the cushion that funds daily operations.
Profit and cash are two separate things. A business records profit the moment it delivers goods or services. Cash arrives only when the customer pays. If a customer takes months to pay, you've booked the profit already — but the rupees haven't landed yet. During that gap you still need to pay your own suppliers, your staff, your rent. That is where companies get into serious trouble.
The Cash Conversion Cycle measures this lag. It starts from the day you pay for raw materials and ends when the customer pays you for the finished product. A company with a short cycle needs far less working capital than one with a long cycle. Shorter is better — and industry context matters enormously. A software business has almost no cycle. A steel plant can take many weeks.
Some businesses have cracked a remarkable trick: they collect cash before paying their suppliers. D-Mart is India's most famous example. Customers pay at the checkout counter immediately. Suppliers wait weeks for payment. The result is negative working capital — the vendor's money temporarily funds the business. This is a genuine structural advantage, not an accounting quirk, and one reason D-Mart's capital efficiency sits far above traditional retail.
The kirana owner's register vs his ledger
The kirana owner's cash in the register isn't what he earned this month. Part is still in the credit book — regulars who buy on tab and pay later. More is locked in stock: dal, oil, masala waiting for buyers. He still owes the distributor for last week's delivery. The cash he can actually touch today — that's the working capital. It's smaller than the revenue figure and different from the profit number. The gap between them is where daily business lives.
Why this matters
When you read a company's results, don't stop at the net profit line. Turn to the balance sheet and check the receivables and inventory rows. If those are growing faster than revenue, cash is accumulating in the pipeline — a pattern that often shows up months before a profit warning. For capital-intensive businesses, working capital intensity explains why a profitable company still keeps raising equity. Comparing working capital as a share of revenue across sector peers tells you which business is genuinely more efficient at turning sales into cash.
Slide the days. Watch your cash position change in real time.
Below, set how many days your customers take to pay and how many days your suppliers give you. Watch how the gap between those two numbers determines how much cash your business needs just to stay operational.
The Cash Conversion Cycle: who funds your business?
Customers pay in 60 days. Suppliers wait 30 days. The difference is your Cash Conversion Cycle—how long cash stays locked before returning as usable cash.
You are funding a 30-day gap. Cash is locked for 30 days after supplier credit runs out. As you grow, this trap demands more capital.
Profit is paper. Working capital is the real test.
Where people go wrong
- Trusting net profit without checking if customers paidProfit is booked on delivery, not on collection. A business showing strong revenue growth while receivables grow even faster is effectively lending to its customers. That cash may or may not return on time.
- Ignoring seasonal working capital swingsA garment exporter before the festive season or an agri-linked business before harvest looks stressed on paper. Some working capital bulges are predictable and reverse cleanly. Others don't — and the difference matters a great deal.
- Treating all current assets as equally liquidSlow-moving inventory can sit on shelves for years and eventually sell at a fraction of book value. A buffer that looks comfortable on the balance sheet may be much thinner in practice.
- Missing working capital growing faster than revenueWhen receivables and inventory consistently grow faster than revenue, the business is absorbing more capital to generate each rupee of growth. This is an early warning signal that often precedes a profit cut or a fresh equity raise.
Working capital is current assets minus current liabilities — the real cash buffer funding daily operations.
D-Mart's negative working capital means vendors partially fund the business — a structural efficiency advantage.
Receivables or inventory growing faster than revenue is an early warning, often appearing before profits fall.
We scan the headline profit number and stop reading. The real stress is always hiding one page further — in receivables that haven't turned to cash and inventory that hasn't moved.