Neither P/E nor EV/EBITDA is always the better valuation ratio. The price-to-earnings (P/E) ratio tells you how much investors pay for a company’s net earnings attributable to common shareholders. Enterprise value to EBITDA (EV/EBITDA) compares the value of an entire business, including its financing, with earnings before interest, taxes, depreciation, and amortization.
Use P/E when comparing consistently profitable companies with broadly similar financing and accounting characteristics. Use EV/EBITDA when you need to compare operating businesses with different levels of debt. For a defensible valuation, examine both alongside free cash flow, growth, and investment needs. The CFA Institute’s guidance on valuation multiples makes the same distinction between equity and enterprise multiples.
P/E vs. EV/EBITDA at a glance
| Question | P/E ratio | EV/EBITDA ratio |
|---|---|---|
| What is being valued? | Common equity (the shares) | The operating business, across capital providers |
| Numerator | Share price or equity market capitalization | Enterprise value (EV) |
| Denominator | Earnings per share or net income attributable to common shareholders | EBITDA |
| Reflects interest expense and taxes in earnings? | Yes | No, they are excluded from EBITDA |
| Reflects depreciation and amortization in earnings? | Yes | No, they are excluded from EBITDA |
| Most useful for | Profitable companies with reasonably comparable financing | Comparing operating businesses with different debt loads |
| Major weakness | Can be distorted by leverage, one-time earnings, or negative profit | Can hide capital spending needs and generous EBITDA adjustments |
Both ratios are multiples, normally shown as 12x or 18x rather than percentages. A lower multiple may indicate a cheaper valuation, but it can also reflect weaker growth, greater risk, or lower-quality earnings. There is no universal P/E or EV/EBITDA threshold that makes a stock a bargain.
How to calculate the P/E ratio
Formula: P/E = Share price ÷ Earnings per share (EPS).
The equivalent company-level calculation is Equity market capitalization ÷ Net income attributable to common shareholders, provided the earnings and share count are measured consistently. Market capitalization means the current share price multiplied by shares outstanding. EPS is generally calculated using weighted-average shares for the earnings period, so share issuances and repurchases can make a simple market-cap-to-net-income calculation differ slightly from the quoted per-share P/E.
Hypothetical example: A stock trades at $60 per share, and its trailing 12-month EPS is $4 per share. P/E = $60 ÷ $4 = 15x. Investors are paying $15 in share price for each $1 of annual earnings per share. This is a valuation comparison, not a promise that the investment pays back in 15 years.
There are two common versions:
- Trailing P/E uses earnings from the last four reported quarters.
- Forward P/E uses estimated future earnings and depends on forecasts that can change.
P/E incorporates the effects of depreciation, interest, and taxes because it uses bottom-line profit. However, it is not meaningful as a conventional positive multiple when earnings are zero or negative. It can also move sharply if a one-time gain, impairment, or cyclical downturn changes net income. For the basic definition, see Investor.gov’s P/E explanation.
How to calculate EV/EBITDA
Formula: EV/EBITDA = Enterprise value ÷ EBITDA.
The simplified enterprise value formula is EV = Equity market capitalization + Interest-bearing debt − Cash and cash equivalents. A full enterprise-to-equity bridge may also include preferred equity, noncontrolling interests, and certain nonoperating assets or investments. The adjustments must match the scope of EBITDA being valued.
EBITDA is earnings before interest, taxes, depreciation, and amortization. In a simplified reconciliation, EBITDA can be calculated from net income by adding back the relevant interest expense, income taxes, depreciation, and amortization, with appropriate treatment of interest income and other nonoperating items. It is not the same as cash flow.
Hypothetical example: A company has an $800 million equity market capitalization, $300 million of debt, $100 million of cash, and $125 million of annual EBITDA.
- EV = $800 million + $300 million − $100 million = $1,000 million.
- EV/EBITDA = $1,000 million ÷ $125 million = 8.0x.
The ratio compares the enterprise’s valuation with its annual EBITDA. Because EBITDA is before financing costs, using EV rather than market capitalization keeps the numerator and denominator conceptually aligned. This makes EV/EBITDA useful for many nonfinancial businesses with different capital structures.
Worked example: two ratios, opposite conclusions
Consider two fictional companies, Alpha and Beta. Every figure below is a hypothetical annual or period-end amount in USD millions; EBITDA and net income refer to the same trailing 12-month period, while balance-sheet and market values are measured at the valuation date.
| Input or result (USD millions except multiples) | Alpha | Beta |
|---|---|---|
| Equity market capitalization | $900 | $600 |
| Interest-bearing debt | $100 | $500 |
| Cash | $100 | $100 |
| Enterprise value | $900 | $1,000 |
| Trailing EBITDA | $100 | $100 |
| Trailing net income attributable to common shareholders | $60 | $50 |
| P/E | 15.0x | 12.0x |
| EV/EBITDA | 9.0x | 10.0x |
Step 1: Calculate P/E. Alpha = $900 million ÷ $60 million = 15.0x. Beta = $600 million ÷ $50 million = 12.0x. P/E says Beta is cheaper relative to reported net income.
Step 2: Calculate enterprise value. Alpha = $900 million + $100 million − $100 million = $900 million. Beta = $600 million + $500 million − $100 million = $1,000 million.
Step 3: Calculate EV/EBITDA. Alpha = $900 million ÷ $100 million = 9.0x. Beta = $1,000 million ÷ $100 million = 10.0x. EV/EBITDA says Alpha has the lower business valuation relative to EBITDA.
What changed? Beta has a smaller equity value but considerably more net debt. P/E looks at the shareholders’ claim on net profit; EV/EBITDA also accounts for the claims of debt investors. Neither ranking alone establishes which stock is undervalued. You still need to compare future growth, borrowing costs, capital expenditure, and earnings quality.
When P/E is the more useful starting point
P/E is often a straightforward first screen for mature, consistently profitable businesses. It focuses on earnings available to common shareholders after interest and taxes, which makes it relevant to the return equity investors are paying for.
It is especially helpful when comparing companies with similar debt profiles, tax circumstances, accounting methods, and expected growth. But the apparent simplicity can be misleading. A company can reduce shares outstanding and increase EPS without increasing total net income. Our guide to how stock buybacks affect EPS explains that mechanism.
For cyclical industries, a very low P/E can occur near peak earnings. Analysts may compare normalized, or mid-cycle, earnings instead of relying on a single unusually profitable year. A high P/E may likewise reflect expected growth rather than automatic overvaluation.
When EV/EBITDA is the more useful starting point
EV/EBITDA is often more comparable when companies operate in the same industry but have very different debt levels. It is commonly used in acquisition comparisons and valuation work involving industrial, telecommunications, and other operating companies.
It can also help when reported net income is depressed by interest charges or large depreciation expenses. Yet eliminating depreciation from EBITDA does not eliminate the economic cost of replacing factories, equipment, vehicles, or data centers. A capital-intensive company may look inexpensive on EV/EBITDA while generating limited free cash flow after capital spending.
Hypothetical capital expenditure check: Two firms each report $100 million of EBITDA, but one spends $60 million annually on capital expenditures while the other spends $10 million. Subtracting those amounts leaves $40 million versus $90 million before changes in working capital, cash interest, taxes, and other adjustments. These figures are not free cash flow; they illustrate why equal EBITDA does not imply equal cash generation.
For banks and many insurers, debt and financing flows are central to operations, so conventional EV/EBITDA is often inappropriate. Analysts commonly emphasize measures such as P/E, price-to-book, return on equity, and industry-specific metrics instead.
Four mistakes to avoid with valuation multiples
- Mixing enterprise value with net income, or equity value with EBITDA. The numerator and denominator must represent the same investor claim. EV pairs with an enterprise-level metric; equity value pairs with an equity-level metric.
- Comparing different periods. Do not compare one company’s trailing EBITDA with another’s forecast EBITDA without labeling and adjusting the analysis. Use the same financial periods and consistent valuation dates.
- Treating adjusted EBITDA as standardized. Companies may exclude different costs, including stock-based compensation or restructuring expenses. The SEC’s guidance on non-GAAP measures explains why definitions and reconciliations matter. Read the bridge back to GAAP net income.
- Ignoring cash generation and business quality. The ratio alone does not capture reinvestment, working capital, capital structure risks, or future growth. Check operating cash flow, capital expenditures, and debt maturities. Our guide to cash flow warning signs provides a practical checklist.
For a broader foundation, see seven financial ratios explained with examples and our guide to reading quarterly earnings reports.
Which valuation ratio should you use?
Start by asking what you are trying to compare. For a profitable company’s common stock, P/E is an intuitive equity-level measure. For two operating businesses with substantially different debt and cash positions, EV/EBITDA can give a more consistent enterprise-level comparison. In most stock analyses, calculate both.
Then test the result: Are the companies in the same industry? Are the periods comparable? Are profits sustainable? What are their growth prospects, reinvestment needs, debt obligations, and free cash flows? If earnings are negative or EBITDA is near zero, the relevant multiple may not be useful at all.
Bottom line: P/E is better for understanding the price of equity relative to bottom-line profit; EV/EBITDA is often better for comparing operating businesses across capital structures. The stronger investment analysis uses the appropriate multiple as a starting point, not a final verdict.
Educational content only. This article does not constitute personalized investment advice.