The unlevered beta calculator estimates a company’s sensitivity to market movements after removing the modeled effect of debt financing. Also called asset beta or delevered beta, it helps you compare business risk across companies with different capital structures. Enter the corporate tax rate, total debt, shareholders’ equity, and equity beta to calculate both unlevered beta and the debt-to-equity ratio.
How to use the unlevered beta calculator
- Corporate Tax Rate: Enter the rate as a percentage—for example, enter 20 for 20%, not 0.20. Use a rate appropriate to the expected tax benefit of interest deductions, often the marginal corporate tax rate.
- Total Debt: Enter the debt amount, including short-term and long-term interest-bearing borrowings. Do not automatically include every liability, such as accounts payable, as financing debt.
- Shareholders’ equity: Enter the equity value used in your analysis. For valuation purposes, market value of equity is generally preferred; for a public company, this is its market capitalization. Using balance-sheet equity instead produces a book-value-based estimate that can differ substantially.
- Equity Beta: Enter the company’s levered beta as a number, such as 1.3. This is the starting estimate of the stock’s sensitivity to its market benchmark.
Use the same currency and scale for debt and equity. For example, $500,000 and $300,000 give the same ratio as 500 and 300 when both amounts are expressed in thousands. Use capital-structure data from a consistent date and consider whether it reasonably reflects the period used to estimate equity beta.
The calculator derives the debt-to-equity ratio from your amounts; you do not enter that ratio separately. It performs the arithmetic but does not determine whether your inputs are market values or book values.
Unlevered beta formula
The calculator uses the following leverage adjustment, commonly known as the Hamada unlevering formula:
Unlevered beta = Equity beta ÷ [1 + (1 − Tax rate ÷ 100) × (Debt ÷ Equity)]
Using the calculator’s variable names:
βU = b ÷ [1 + (1 − t/100) × (d/c)]
- βU: Unlevered beta, the calculated result.
- b: Equity beta, also called levered beta.
- t: Corporate tax rate entered as a percentage.
- d: Total debt.
- c: Shareholders’ equity.
The second output is D/E ratio = d ÷ c. The tax adjustment reflects the shield provided by tax deductions on interest payments, under the model’s assumptions.
Worked example
Suppose a company has an equity beta of 1.3, debt of $500,000, equity of $300,000, and a corporate tax rate of 20%.
| Step | Calculation | Result |
|---|---|---|
| Calculate D/E | $500,000 ÷ $300,000 | 1.6667 |
| Calculate the leverage adjustment | 1 + (1 − 0.20) × (500,000 ÷ 300,000) | 2.3333 |
| Unlever the equity beta | 1.3 ÷ 2.3333 | Approximately 0.5571 |
Intermediate values are rounded for display. Using full precision, the unlevered beta is approximately 0.5571, compared with an equity beta of 1.3. Under this model, debt financing accounts for part of the equity’s market sensitivity.
What does unlevered beta tell you?
Equity beta reflects market-related business risk plus the effect of financial leverage on shareholders. Unlevered beta estimates that market sensitivity without the leverage effect. It measures systematic risk, not total volatility or every risk a business faces.
- Above 1: Indicates greater estimated market sensitivity than the benchmark, after the leverage adjustment.
- Between 0 and 1: Indicates positive but lower estimated market sensitivity than the benchmark.
- Near 0: Indicates little estimated relationship with benchmark movements—not an absence of business risk.
- Below 0: Indicates an estimated tendency to move opposite the benchmark. Check the underlying beta estimate before drawing conclusions.
These are interpretations, not investment ratings. A beta of 0.56 does not mean a company will move exactly 0.56% whenever the market moves 1%, nor does it establish that the company is financially safe.
The accompanying debt-to-equity ratio shows how much debt supports each unit of equity. In the example, 1.6667 means approximately $1.67 of debt for every $1 of equity. Whether that leverage is sustainable depends on cash flow, borrowing terms, industry conditions, and other factors.
Using unlevered beta in valuation and company comparisons
Unlevered beta is especially useful when the financing of a comparable company differs from the financing assumed for your valuation.
- Choose relevant peers. Look for companies with similar operations, customers, and economic exposures. Removing leverage does not make unrelated businesses comparable.
- Unlever each peer’s equity beta. Use consistent methods for debt, equity, tax rates, and beta estimation.
- Review the peer results. Investigate unusual values before choosing a representative estimate, such as a median.
- Apply the target capital structure. Relever the selected asset beta if you need an equity beta for a business or project financed with debt.
The reverse adjustment is:
Target equity beta = Unlevered beta × [1 + (1 − Target tax rate) × Target D/E]
Here, the target tax rate is expressed as a decimal. Using the example’s unrounded asset beta, a target D/E ratio of 0.5 and a 20% tax rate produce an equity beta of 0.78. This reverse calculation is a separate analytical step, not an additional output of this calculator.
For a CAPM-based valuation, use the equity beta appropriate to the target financing in the Cost of Equity Calculator. To examine borrowing costs alongside equity costs, use the After-tax Cost of Debt Calculator.
Assumptions and common calculation mistakes
- The formula assumes debt beta is zero. It treats debt as having negligible systematic risk. Risky or distressed borrowing may require a model that explicitly includes debt beta.
- The tax benefit may be limited. Interest deductibility restrictions, losses, or other tax circumstances can make a simple tax-rate adjustment less representative.
- Equity must be usable as a denominator. Zero equity makes the calculation undefined. Negative equity generally makes this standard unlevering approach unsuitable for valuation.
- Input beta is an estimate. Its benchmark, observation period, and return frequency affect the result. Unlevering does not eliminate estimation error.
- Nonoperating cash is not adjusted separately. This calculator does not produce a cash-adjusted operating beta, which may matter when comparing cash-rich businesses.
With no debt, unlevered beta equals equity beta. For a positive equity beta and a tax rate below 100%, increasing D/E while holding other inputs fixed lowers the calculated unlevered beta. That mathematical effect does not mean taking on more debt makes the business safer.
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