Price-to-Sales Ratio (P/S)

The Price-to-Sales ratio compares a company's market capitalization to its total annual revenue. It is calculated by dividing the stock price by revenue per share, or equivalently, market cap by total revenue.

P/S is especially useful for companies that are not yet profitable, such as high-growth startups burning cash to capture market share. Since these companies have no positive earnings, P/E is undefined, but P/S still provides a valuation anchor based on the top line.

Interpreting P/S

A P/S below 1.0 means you are paying less than one dollar for each dollar of annual revenue the company generates. This is rare for healthy businesses and may signal undervaluation or serious problems. A P/S of 2 to 5 is typical for mature companies. Above 10 is common for high-growth SaaS businesses with recurring revenue and high margins.

The critical limitation of P/S is that it ignores profitability entirely. A company generating 10 billion in revenue at a 30 percent margin is worth far more per dollar of revenue than one with a 2 percent margin. Always combine P/S with margin analysis to get the full picture.