Unlevered Beta Calculator

The unlevered beta calculator estimates asset beta by removing the effect of debt from observed equity beta. In practice, equity beta is what many data services publish because common stock trades in the market. But common stock belongs to the residual claimants of a company, and leverage can amplify the stock’s response to changes in enterprise value. Unlevering beta separates the operating-risk estimate from that financing effect.

This page follows the calculator’s exact calculation. You enter levered beta, corporate tax rate, total debt, and shareholders’ equity. The calculator divides total debt by shareholders’ equity to get the debt-to-equity ratio. It converts the tax rate from a percentage into a tax shield factor of one minus tax rate. It then divides levered beta by one plus the tax shield factor times the debt-to-equity ratio. The primary result is unlevered beta, and the supporting rows show the leverage inputs behind it.

For related work, use the Portfolio Beta Calculator to combine asset or equity betas across holdings, the CAPM calculator to convert beta into an expected return, and the Jensen’s Alpha Calculator to compare actual portfolio return with beta-adjusted expected return.

Informational, not investment advice.

What unlevered beta measures

Unlevered beta is designed to measure business risk rather than financing risk. Two companies can sell similar products, face similar customers, and operate in similar markets while showing different equity betas simply because one uses more debt. Debt makes equity more sensitive because interest and principal obligations sit ahead of common shareholders. When operating income rises, more upside flows to equity after fixed debt claims. When operating income falls, equity absorbs more of the pain.

Analysts unlever beta when comparing companies, building weighted average cost of capital assumptions, or estimating a beta for a private company. The usual workflow is to gather levered betas for comparable public companies, unlever each one, average or otherwise judgmentally select an asset beta, and then relever that beta for the target company’s intended debt-to-equity ratio. This calculator covers the unlevering step only.

Formula

First, the calculator calculates debt-to-equity:

$\text{debt-to-equity ratio} = \frac{\text{total debt}}{\text{shareholders' equity}}$

Then it calculates the tax shield factor:

$\text{tax shield factor} = 1 - \frac{\text{tax rate}}{100}$

Finally, it removes the leverage effect:

$\text{unlevered beta} = \frac{\text{levered beta}}{1 + \text{tax shield factor} \times \text{debt-to-equity ratio}}$

This is the asset beta formula specified for the batch: asset beta equals levered beta divided by one plus one minus tax rate times debt-to-equity. The calculator reports the leverage effect removed as levered beta minus unlevered beta.

Checking the primary result

Use the default inputs: levered beta of 1.20, corporate tax rate of 20 percent, total debt of $12,000,000, and shareholders’ equity of $6,000,000.

The debt-to-equity ratio is $12,000,000 divided by $6,000,000, which equals 2.00. The tax shield factor is 1 minus 20 divided by 100, or 0.8000. The denominator is 1 plus 0.8000 times 2.00, which equals 2.6000.

The unlevered beta is therefore:

$\text{unlevered beta} = \frac{1.20}{2.6000} = 0.4615$

The calculator formats the primary result as 0.4615. It also shows a leverage effect removed of 1.20 minus 0.4615, or 0.7385. The output makes clear that most of the observed equity beta in this example is tied to leverage, not only to operating-asset risk. If debt were cut to $6,000,000 while equity stayed $6,000,000, the denominator would fall to 1.8000 and unlevered beta would rise to 0.6667.

How analysts use the result

Unlevered beta is a bridge between observed market data and a valuation assumption. A discounted cash flow model generally needs a cost of equity or weighted average cost of capital that reflects the target company’s risk. If the target’s capital structure differs from public comparables, directly copying a comparable’s levered beta can import the wrong amount of debt risk. Unlevering makes the comparable set more comparable.

The result also helps explain why leverage decisions change shareholder risk. If management increases debt while operations stay the same, equity beta can rise even if customer demand, margins, and product risk have not changed. Conversely, a deleveraging company may show a falling equity beta that partly reflects balance-sheet repair rather than a safer operating business.

Limitations and common mistakes

The calculatorula is simple, so the inputs carry most of the judgment. Debt should include interest-bearing obligations relevant to the analysis. Equity should be positive; the calculator rejects zero or negative shareholders’ equity because debt-to-equity would not be meaningful. Tax rate should be entered as a percentage, not a decimal, so enter 20 for 20 percent.

The calculatorula assumes a particular relationship among debt, taxes, and equity risk. It does not handle preferred stock, cash adjustments, operating leases, changing debt targets, or distress directly. It also does not solve the hardest comparable-company question: whether the businesses truly share similar operating risk. Use the output as a transparent estimate, document each input, and avoid treating a four-decimal beta as more certain than the underlying assumptions.

Sources

• CFI, Unlevered Beta — explanation of asset beta and the leverage adjustment.
• NYU Stern, Aswath Damodaran, Betas by Sector — sector beta data used in valuation contexts.
• NYU Stern, Aswath Damodaran, Estimating Risk Parameters — detailed treatment of beta estimation and financial leverage.