Price-to-Earnings vs EV/EBITDA for Comparing Companies

While price-to-earnings and EV/EBITDA both value a company relative to its earnings power, they differ fundamentally in what “earnings” means, how leverage and taxes distort the comparison, and whether the ratio captures entire enterprise value or just equity value.

The Mechanical Difference

A price-to-earnings (P/E) ratio divides the stock price (or market capitalization) by the company’s net income. It tells you how many dollars of annual profit an investor is paying for. A company trading at a P/E of 20 has a market cap equal to 20 times its annual net earnings.

An EV/EBITDA ratio divides the enterprise-value (market cap plus net debt) by earnings before interest, taxes, depreciation, and amortization. It tells you what the entire business (equity plus debt holders together) is worth as a multiple of operating earnings, before the deductions of financing costs and taxes.

These definitions encode a profound difference: P/E is an equity-only metric that assumes all financing and tax consequences are baked in. EV/EBITDA strips away financing and taxes to isolate operational earning power.

Leverage and Interest Expense

Consider two companies with identical operating earnings of $100 million:

Company A has no debt and pays $25 million in taxes (at a 25% rate), leaving $75 million of net income. Its P/E assumes all $75 million flows to equity.

Company B has $200 million of debt at 5% interest, costing $10 million annually. It pays taxes on the remaining $90 million, or $22.5 million, netting $67.5 million to equity.

Both have $100 million of EBITDA. Company A’s net income is $75 million; Company B’s is $67.5 million. If both have a market cap of $1 billion:

• Company A: P/E = 1,000 / 75 = 13.3x
• Company B: P/E = 1,000 / 67.5 = 14.8x

Their P/E ratios differ, even though their operational efficiency is identical. Company B looks “more expensive” on P/E, but only because it chose to fund itself with debt instead of equity.

Now, for EV/EBITDA:

• Company A: EV = $1,000 (equity only, no debt), so EV/EBITDA = 1,000 / 100 = 10x
• Company B: EV = $1,000 (equity) + $200 (debt) = $1,200, so EV/EBITDA = 1,200 / 100 = 12x

The gap is smaller because EV includes the debt financing, and EBITDA is unaffected by the interest expense. The EV/EBITDA shows that Company B’s enterprise is priced at a small premium—12x vs 10x—but not because of leverage per se; it is because the debt holders own more of the economic pie.

The lesson: P/E can be distorted by capital structure. EV/EBITDA is capital-structure neutral, which is why it is preferred for comparing companies with different leverage.

Tax Jurisdiction and Effective Rates

Companies in low-tax jurisdictions (e.g., Ireland, or tax havens) report higher net income because less is deducted for taxes. Companies in high-tax jurisdictions net less income from the same operating earnings. A US company with a 25% effective tax rate and $100 million EBITDA nets $75 million. A company in Denmark with a 37% rate nets $63 million. Their P/E ratios will diverge even if they are equally profitable operationally.

EV/EBITDA ignores the tax rate, so it provides a cleaner comparison across geographies. This is why multinational deals and cross-border equity research typically use EV/EBITDA as the primary metric. A Russian telecom and a Swedish telecom can be compared on EV/EBITDA more fairly than on P/E.

Depreciation and Capital Intensity

EBITDA strips out depreciation and amortization, which can vary dramatically across industries and accounting regimes. An airline with heavy aircraft depreciation will show much lower net income than a software company with minimal depreciation, even if both generate the same cash flows operationally.

By using EBITDA—which adds back depreciation—you compare operating power without the accounting distortion. However, this comes with a cost: depreciation is a real cash outflow that eventually requires replacement capex. A company with $100 million EBITDA but $80 million annual depreciation has far less cash available to equity holders or debt holders than a company with $100 million EBITDA and $10 million depreciation.

In capital-intensive sectors (utilities, infrastructure, oil & gas), the gap between EBITDA and free cash flow is large, and EV/EBITDA alone can mislead. Net income, by deducting depreciation, at least hints at this reality. Many sophisticated analysts therefore use EV/EBITDA alongside free-cash-flow or capex metrics.

When to Use Each Ratio

Use P/E when:

• Comparing companies within the same country and tax regime
• Assessing profitable, mature firms with stable capital structures
• The companies have similar depreciation patterns (or none)
• You want to capture the actual return available to equity holders after all costs

A P/E-based comparison of two US-listed consumer staples, both with similar leverage and both profitable, is straightforward. P/E works well here because the distortions (tax, leverage) are roughly aligned.

Use EV/EBITDA when:

• Comparing companies across geographies or tax regimes
• Companies have different levels of leverage (you want to strip out interest expense)
• The sector is capital-intensive and depreciation varies widely
• Assessing pre-revenue or heavily loss-making firms (where net income is negative but EBITDA is positive)

A cross-border M&A comparison of two tech companies with different debt loads is better done via EV/EBITDA. It isolates operational value from financing choices.

The “Quality of Earnings” Question

A company with $100 million net income may have achieved it through core operations or through one-time gains, extraordinary items, or accounting accruals that don’t reflect cash. P/E can be gamed by timing asset sales or writing down reserves. EBITDA is more resistant to these games because it is closer to operating cash (though still imperfect; companies can manipulate revenue recognition and depreciation estimates).

Neither ratio is immune to accounting manipulation, but EV/EBITDA is less sensitive to capital allocation choices (financing structure, divestiture timing) and more focused on the business’s repeatable operational earning power.

Combined Use in Practice

Sophisticated analysts rarely rely on a single metric. A discounted-cash-flow-valuation model or relative-valuation approach typically includes both:

1. EV/EBITDA as the primary comparability metric (normalized for leverage and taxes)
2. P/E as a secondary check (to see if net income story is consistent)
3. Free cash flow and capex-to-EBITDA to assess sustainability
4. Enterprise-value to EBIT or NOPAT (net operating profit after tax) as middle-ground metrics

A company that looks cheap on P/E but expensive on EV/EBITDA is likely in distress or heavily indebted—the low P/E is a trap. Conversely, a company cheap on both metrics is genuinely undervalued, assuming the earnings are sustainable.

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