Why Does an Increase in Working Capital Reduce Cash?
Calculate the cash impact of working capital changes through receivables, inventory, and payables. Learn how operating working capital differs from current assets minus current liabilities.
Operating working capital represents money tied up in inventory, receivables, and similar items before sales proceeds are collected, less operating funding provided by suppliers and customers. All else equal, an increase uses cash and a decrease releases cash. List the accounts included in the analysis first to avoid confusing the signs of the changes.
Separate liquidity measures from operating working capital
Working capital defined as current assets minus current liabilities is a starting point for assessing short-term financial position. Cash generation analysis often groups operating assets and liabilities separately, excluding cash and borrowings. The simple formula of receivables plus inventory minus payables can be extended to include advances paid, accrued operating expenses, and contract liabilities. Whatever scope you choose, apply it consistently each year and document the included items. The key is to avoid treating cash raised through additional borrowing as an improvement in operating working capital.
Calculate the cash required rather than focusing only on growth rates
A rapidly growing company's receivables increase even if collection periods stay constant. Before interpreting receivables growth as a problem, compare it with sales growth. Relate inventory to cost of sales and production schedules, and payables to purchasing volumes and payment terms. Using turnover days for each item to estimate the funding needed for additional sales helps assess borrowing requirements driven by growth. Even with identical profit margins, businesses that collect upfront and businesses that deliver on credit can have very different funding needs as they grow.
When balance sheet changes differ from cash flow adjustments
Do not assume that the difference between opening and closing balances exactly matches the working capital adjustment in the cash flow statement. Inventory acquired with a subsidiary, translation of foreign currency balances, and noncash changes such as bad debts or write-downs may be included. Balance comparisons help identify warning signs; reconcile the actual operating cash impact with the cash flow notes. In particular, if inventory liquidation improved cash flow, goods available for sale and future revenue may also have declined. Assess whether the improvement represents sustainable efficiency. Recording working capital as a share of sales also helps separate the effect of business growth. For highly seasonal companies, however, match the same reporting dates rather than mixing low and peak seasons.
Worked example
Hypothetical example: In year one, receivables of KRW 8 billion plus inventory of KRW 7 billion minus payables of KRW 5 billion give simple operating working capital of KRW 10 billion. If the respective amounts are KRW 10 billion, KRW 9 billion, and KRW 6 billion the next year, operating working capital is KRW 13 billion. Assuming no noncash changes, the KRW 3 billion increase is a cash outflow. Even though sales have grown, additional money is needed to bridge the gap between collecting from customers and paying suppliers.
What to check
- Have you specified the accounts included in operating working capital?
- Have you assigned the correct cash inflow or outflow sign to each change?
- Have you separated acquisition and exchange rate effects?
- Have you distinguished additional growth funding from recurring cash leakage?
Sources and primary materials
This is educational material about research methods. For an actual company decision, verify the filings and primary sources for the relevant period.