Net Working Capital (NWC)

We exclude cash and debt because they are non-operating financial items. Cash represents accumulated past results or financing proceeds rather than capital tied up in daily operations. Debt is a financing activity that carries interest. NWC isolates the operational liquidity metrics of the core business independent of how it is capitalised.

Yes, a company can have negative NWC. Whether it is good or bad depends on the business model. For a subscription business or a retailer like Amazon, customers pay upfront (low receivables) while suppliers are paid much later (high payables). This generates negative NWC, which acts as a source of free cash during growth. However, for other businesses, negative NWC could signal severe distress, meaning the company cannot meet its short-term operating obligations.

On the Income Statement, there is no immediate impact because inventory has not been sold yet, so Cost of Goods Sold is unchanged. On the Cash Flow Statement, under Operating Activities, the GBP 10 (USD 13) increase in inventory reduces cash flow by GBP 10 (USD 13), leading to a net cash decrease of GBP 10 (USD 13). On the Balance Sheet, Inventory rises by GBP 10 (USD 13) and Cash drops by GBP 10 (USD 13), keeping the assets side balanced, with no change to equity.

An increase in Accounts Payable means the company is delaying payments to its suppliers, effectively keeping cash in the business. Since operating liabilities increase, Net Working Capital decreases (or changes negatively). A negative change in NWC is a cash inflow on the Cash Flow Statement, which directly increases Free Cash Flow for that period.

Rapid growth requires scaling operations. To support higher sales volume, a company must purchase more inventory in advance and extend more trade credit to new customers, increasing accounts receivable. Unless the company can aggressively extend its payables terms with suppliers to match, the increase in operating assets will outpace operating liabilities, creating a cash outflow that consumes liquidity.

The standard formula is Operating Current Assets (excluding Cash) minus Operating Current Liabilities (excluding Debt). Specifically: (Accounts Receivable + Inventory + Prepaid Expenses) - (Accounts Payable + Accrued Expenses).

Days Sales Outstanding (DSO) measures the average number of days it takes to collect receivables. Days Inventory Outstanding (DIO) measures how long inventory sits on the shelves. Days Payable Outstanding (DPO) measures how long a company takes to pay its suppliers.

NWC directly impacts the Free Cash Flow to Firm (FCFF) formula. Higher NWC requirements reduce FCFF in the projection years, which lowers the present value of future cash flows and decreases the overall enterprise value.

In textbook terms, working capital can sometimes refer simply to total current assets. Net Working Capital explicitly looks at the net position of current assets minus current liabilities, with the corporate finance variant strictly isolating operating items.

M&A deals typically include a Working Capital Peg or Target in the purchase agreement. If the actual NWC at closing is lower than the target, the purchase price is adjusted downwards to protect the buyer from a depleted operating position.

Yes. An inventory write-down reduces operating current assets, which lowers Net Working Capital. This write-down passes through the income statement as an expense, reducing net income but creating a non-cash adjustment on the cash flow statement.

Capital-intensive businesses often deal with physical goods, long production cycles, and institutional clients. They must maintain substantial raw material stock and wait months for customer payouts, locking up significant cash in the process.