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L.6 · BEGINNER · 3 MIN

The Working Capital Walk: Where Cash Hides in Plain Sight

Working capital is the cash a business needs locked up inside the operating cycle just to keep the doors open. When a customer takes 60 days to pay, when finished goods sit on a shelf, when a supplier has to be paid before that finished good ships — every one of those gaps is dollars a company has spent but not yet recovered. The working-capital walk is the discipline of taking three line items from the balance sheet and reading them as days, not dollars, so the cash drag (or cash benefit) becomes visible at a glance.

Quiz · 5 questions ↓
§ 01

The three working-capital line items, translated to days. Accounts receivable becomes Days Sales Outstanding (DSO): receivables divided by daily revenue. Inventory becomes Days Inventory Outstanding (DIO): inventory divided by daily cost of goods sold. Accounts payable becomes Days Payable Outstanding (DPO): payables divided by daily cost of goods sold. The dollar amounts on the balance sheet are nearly meaningless without their day-equivalents — a 200M receivable balance is wonderful for a $4B revenue business (18 days) and alarming for a $400M one (180 days).

§ 02
CCC = DIO + DSO - DPO
§ 03
MoveLikely featureLikely flag
Receivables grow faster than revenueNew large-customer contract with longer payment termsChannel stuffing or customer credit deterioration
Inventory days rise sharplyPre-build for a known launch or seasonal peakDemand slowdown the income statement has not yet booked
Payables stretch by 20+ daysSupplier negotiation moat (the Costco / Walmart pattern)Cash crunch — paying suppliers late because cash is tight
CCC swings negativePricing power — customers prepay or suppliers absorb the floatRare; usually a feature when it happens
§ 04

Operating working capital vs total working capital. Total working capital (current assets minus current liabilities) sweeps in cash, short-term debt, and other treasury items that have nothing to do with operations — moves in those line items are financing decisions, not operating signals. Operating working capital strips both sides: it sums only the operating current assets (receivables + inventory + prepaid expenses) minus the operating current liabilities (payables + accrued expenses). The operating cut is the right diagnostic for how much cash the business itself ties up; the total cut is for liquidity-coverage questions.

§ 05
Pull up any large retailer on the platform and grab three line items from its latest balance sheet: accounts receivable, inventory, accounts payable. Compute DSO using its trailing-twelve-month revenue and DIO and DPO using its trailing-twelve-month cost of goods sold. Add them in the CCC formula. Compare to a heavy industrial company on the same screen. The number gap between retail (often negative or low-single-digit days) and industrial (often 100+ days) tells you which business model can scale revenue without consuming cash and which one consumes more cash every dollar of growth.
§ 06

A profitable business with rising working capital can run out of cash. The income statement keeps booking the sale, but the cash sits in receivables and inventory that have not yet converted. Strong investors check the working-capital walk every quarter — a one-time DSO bulge is noise, a three-quarter trend is the story before management tells it.

Five questions · AI feedback

Sit with the ideas.

Northwind Components reports the following for fiscal year 2026: revenue $1.46B, cost of goods sold $876M, accounts receivable $240M, inventory $144M, accounts payable $108M. Working from these figures, what is Northwind's Cash Conversion Cycle, and what does it tell you about the cash trapped inside the operating cycle?

Why:
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