What is the Price-to-Sales Ratio? Definition, Formula, and Example
The price-to-sales ratio (P/S) is a valuation multiple equal to a company's market capitalization divided by its trailing twelve months of revenue, showing how many dollars investors pay for each dollar of sales.
What Is the Price-to-Sales Ratio?
The price-to-sales ratio (P/S) measures how much the market pays for each dollar of a company's revenue. It divides market capitalization by trailing twelve-month (TTM) revenue. A P/S of 5 means investors value the company at five times its annual sales. Because revenue is positive for almost every operating business, P/S works on companies that have no earnings yet. That makes it the standard yardstick for early-stage growth stocks, turnarounds, and cyclicals at the bottom of their profit cycle.
How the Price-to-Sales Ratio Is Calculated
There are two equivalent forms:
P/S = Market Capitalization / TTM Revenue
P/S = Share Price / (TTM Revenue / Diluted Shares Outstanding)
The inputs come straight from the income statement in the company's 10-K and 10-Q filings with the SEC. TTM revenue is the sum of the last four reported quarters. A forward P/S substitutes next-twelve-month consensus revenue for TTM revenue.
A closely related variant is EV/Sales, which uses enterprise value in the numerator instead of market cap. EV/Sales adds debt and subtracts cash, so it corrects for capital structure differences that plain P/S ignores.
Worked Example: NVDA
NVDA reported fiscal 2025 revenue (year ended January 2025) of $130.5 billion in its 10-K. Assume, for illustration, a share price of $180 and 24.4 billion diluted shares outstanding.
- Market cap = $180 x 24.4B = $4.39 trillion
- P/S = $4.39T / $130.5B = 33.6x
Now compare a mature retailer with, for illustration, $680 billion in revenue and a $780 billion market cap. Its P/S is 1.15x. NVDA's multiple is roughly 29 times higher. That gap does not mean NVDA is 29 times more expensive in any absolute sense. It reflects NVDA's gross margin above 70% against a retailer's mid-20s margin, plus a far faster growth rate. Every dollar of chip revenue converts to much more profit than a dollar of grocery revenue.
When Traders Use the P/S Ratio
- Pre-profit growth names. When the P/E ratio is negative or meaningless, P/S is the primary valuation anchor for software, biotech with commercial products, and recent IPOs.
- Sector-relative screening. P/S is compared within an industry, never across them. A SaaS stock at 8x sales sits near the middle of its peer group, while a 1.5x P/S is cheap for a hardware distributor.
- Cycle-bottom valuation. Semiconductors, autos, and homebuilders show depressed or negative earnings at cycle troughs. P/S stays stable and flags when the market is pricing in a permanent collapse.
- Multiple compression risk. Traders track P/S expansion during momentum runs. Stocks above 20x sales give back a large share of their gains when growth decelerates, even if revenue keeps rising.
Filter for sector-relative P/S outliers alongside growth and volume in the live scanner.
Limitations and Common Misconceptions
- Revenue is not profit. A company with $10 billion in sales and a 2% net margin earns less than one with $2 billion in sales and a 25% margin. P/S ignores this entirely, so pair it with gross margin and operating margin.
- Debt is invisible. Two companies with the same P/S carry very different risk if one has net cash and the other holds three times sales in debt. Use EV/Sales for leveraged businesses.
- Low P/S is not a buy signal. Department stores and legacy telecom trade below 1x sales for years because their revenue is shrinking. A low multiple frequently prices in decline correctly.
- Revenue recognition varies. Gross versus net reporting (marketplaces, travel agencies, ad networks) changes reported revenue by a factor of five or more for the same economic activity, distorting cross-company comparisons.