How to Calculate Working Capital
Learn how to calculate working capital, the working capital ratio, and the cash conversion cycle, and understand what these metrics reveal about short-term financial health.
What Is Working Capital?
Working capital is the net amount of short-term resources available to fund a company's day-to-day operations. It represents the buffer between what a business owes in the near term and what it can quickly convert to cash. A positive working capital balance means the company can cover its short-term obligations; a negative balance means current liabilities exceed current assets, which signals liquidity risk unless the business has reliable credit facilities or generates cash very quickly from operations.
The Working Capital Formula
Working Capital = Current Assets - Current Liabilities. Current assets typically include cash, accounts receivable, inventory, and prepaid expenses. Current liabilities include accounts payable, accrued expenses, short-term debt, and deferred revenue due within 12 months. If a company has $850,000 in current assets and $530,000 in current liabilities, its working capital is $320,000. This means it has $320,000 of net short-term resources available beyond what it needs to settle near-term obligations.
The Current Ratio and Quick Ratio
The current ratio normalizes working capital as a ratio: Current Ratio = Current Assets / Current Liabilities. A ratio above 1.0 means positive working capital; below 1.0 means negative. In the example above, $850,000 / $530,000 = 1.60, generally considered healthy. The quick ratio (or acid-test ratio) is more conservative: Quick Ratio = (Cash + Accounts Receivable) / Current Liabilities. It excludes inventory and prepaid expenses, which may not be quickly convertible to cash. A quick ratio above 1.0 indicates the business can meet current liabilities with its most liquid assets alone.
Net Working Capital vs. Gross Working Capital
Gross working capital refers simply to the total current assets figure with no subtraction. Net working capital (NWC) — what most analysts mean when they say "working capital" — is current assets minus current liabilities. In mergers and acquisitions, the parties negotiate a working capital peg: a target NWC level deemed necessary to run the business normally. If NWC at closing is above the peg, the seller receives a higher price; if below, the buyer receives a price reduction. Understanding the components of NWC is essential for any M&A transaction.
Negative Working Capital: Problem or Feature?
For most businesses, negative working capital is a red flag — current liabilities exceed current assets, leaving the business dependent on ongoing cash inflows or credit to meet obligations. However, some business models operate with structurally negative working capital as a feature, not a bug. Amazon, Walmart, and McDonald's (franchised locations) collect cash from customers immediately but pay suppliers weeks or months later. This "float" funds operations and generates a form of interest-free financing. In these models, more negative working capital is often better, as long as sales continue to grow.
The Cash Conversion Cycle
The Cash Conversion Cycle (CCC) measures how long it takes a business to convert resource inputs into cash flows from sales. CCC = Days Inventory Outstanding (DIO) + Days Sales Outstanding (DSO) - Days Payable Outstanding (DPO). A company with DIO of 45 days, DSO of 30 days, and DPO of 40 days has a CCC of 35 days. Shortening the CCC — by turning inventory faster, collecting receivables sooner, or extending payables — reduces the working capital the business must finance and improves cash generation.
Managing Working Capital Effectively
Working capital optimization involves three levers. On the receivables side: tighten credit terms, send invoices promptly, follow up on overdue accounts, and consider offering early payment discounts. On the inventory side: reduce safety stock through better demand forecasting and use just-in-time replenishment where possible. On the payables side: negotiate longer payment terms with suppliers and take advantage of extended terms when offered, without damaging relationships. Together these three levers can dramatically reduce the cash tied up in the operating cycle without requiring any change to the underlying business model.
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