Cash Flow Profitability

Working capital tied up in receivables and inventory is usually described as a cash flow problem, which is true but incomplete. It's also a cost — a specific, calculable one, because that cash could be earning a return elsewhere or reducing debt, and every extra day it sits uncollected or unsold is a day that opportunity is lost.

Framing it as a cost rather than just a timing issue changes how seriously it gets treated internally. "Our collections are a bit slow" invites a shrug. "Our collections are costing us roughly ₹12 lakh a year" invites a project plan, a budget line, and someone accountable for fixing it — even though both statements are describing exactly the same underlying problem.

The mechanics, briefly

Receivable days measure how long, on average, it takes customers to pay you. Payable days measure how long you take to pay your own vendors. Inventory days measure how long stock sits before it sells. Together — inventory days plus receivable days, minus payable days — they form your cash conversion cycle: the number of days your own cash is tied up funding the gap between paying for inputs and collecting from customers.

Putting a number on it

Assume your cost of capital — what you'd otherwise earn on that cash, or the interest rate you'd otherwise pay to borrow it — is 12% annually. If your receivables have stretched by an extra 30 days on an average outstanding balance of ₹1 crore, that's roughly ₹1 crore tied up for an extra month that wouldn't otherwise be. At a 12% annual cost of capital, that's approximately ₹1 lakh of real, quantifiable cost for that single month — not a hypothetical inconvenience, an actual number that a finance team could put in a report.

Run that same ₹1 lakh-a-month cost across a full year without the underlying receivable-days problem being fixed, and it becomes roughly ₹12 lakh annually — a number large enough, in most businesses, to fund the exact collections process or inventory discipline that would have prevented it in the first place.

The same math, applied to inventory

The identical calculation applies to excess inventory. Stock that sits for an extra 45 days beyond what's operationally necessary carries the same cost-of-capital charge as stretched receivables — and often a second cost on top of it, in the form of storage, insurance, and the risk of obsolescence or damage the longer it sits unsold. A business that's never measured its inventory days against what the operation actually requires is very likely paying this cost without knowing it has a name.

Where this cost hides

It never appears as a line item called "cost of slow collections." It hides inside a working capital loan taken to cover the gap, inside cash that could have funded growth instead of sitting in a warehouse or a customer's accounts payable ledger, and inside the opportunity cost of a founder's own capital tied up in the business rather than earning a return elsewhere. Nobody sees the bill because no one sends one.

Why this reframing changes the conversation

"Our receivable days went from 45 to 60" sounds like an operational detail. "That stretch is costing us roughly ₹X lakh a year in tied-up capital" is a number that gets a collections process funded, a vendor negotiation prioritised, or an inventory policy revisited — because it's now competing on the same terms as every other line item in the budget.

If you've never calculated the actual cost of your own working capital cycle against your cost of capital, that number is usually the fastest way to get a stalled efficiency conversation taken seriously.