Activity Ratios

What Is Activity Ratios?

Activity ratios, also called efficiency ratios or turnover ratios, are a group of measures that show how well a company manages its resources. They answer a practical question: how much revenue or cost does the business generate from the inventory, receivables, and assets it holds? A company that turns over its assets quickly is generally using them more productively than one where assets sit idle for long periods.

Most activity ratios divide a flow measure from the income statement, such as sales or cost of goods sold, by a balance sheet item, such as inventory, receivables, or total assets. Because balance sheet values are a snapshot at one point in time, analysts often use an average of the beginning and ending balances for the period.

Common Activity Ratios

The most widely used activity ratios include:

• Inventory turnover, which compares cost of goods sold with average inventory and shows how often stock is sold and replaced.
• Receivables turnover, which compares net credit sales with average accounts receivable and reflects how quickly customers pay.
• Payables turnover, which compares purchases on credit with average accounts payable and reflects how quickly the company pays its suppliers.
• Asset turnover, which compares net sales with average total assets and shows how much revenue each dollar of assets produces.

Each ratio is usually expressed as a number of times per year. Related versions convert these into days. For example, days sales outstanding is calculated as:

Days Sales Outstanding = 365 / Receivables Turnover

Why It Matters to Investors

Activity ratios help investors see whether a company's operations are running efficiently. A rising inventory turnover may suggest strong demand or tight stock control, while a falling one may point to unsold products or weakening sales. Changes in receivables turnover can hint at looser or tighter credit policies, or at customers taking longer to pay.

Limitations

These ratios are most useful when compared with a company's own history or with close industry peers. Norms differ widely: a grocery chain typically turns inventory far faster than a jewelry retailer or an aircraft manufacturer. Seasonal businesses can also show distorted results depending on the period chosen. Activity ratios should be read alongside profitability ratios, liquidity ratios, and leverage ratios rather than on their own, since a company can be efficient yet still unprofitable or overextended with debt.