π Unlevered Beta Calculator
Business risk without the debt distortion.
Unlevered (asset) beta
Estimates for planning only, not financial advice.
A stock with a levered beta of 1.4, a debt-to-equity ratio of 0.8, and a 21 percent tax rate has an unlevered beta of 0.858. Over a third of the stock's market risk comes from the debt, not the business. Strip the debt effect and you can finally compare its operating risk against an unlevered peer.
How to Use This Calculator
Enter the equity (levered) beta from any finance site, the company's debt-to-equity ratio (market values ideally), and the corporate tax rate. The calculator returns the asset beta via the Hamada equation.
Get levered beta from the stock's quote page. Note the measurement period; 2-year weekly is standard.
Compute D/E with market value of equity (market cap), not book value, for valuation work.
Compare unlevered betas across peers to rank true business risk, then relever at your target capital structure.
The Formula (Hamada Equation)
Debt magnifies equity volatility: the same business with more debt has a higher equity beta because debtholders get paid first and shareholders absorb the swings. The (1 - tax) term reflects the tax shield on interest, which softens debt's risk impact. Unlevering isolates the operating asset's systematic risk, the number that actually describes the business.
Worked Example
Levered beta 1.4, D/E 0.8, tax 21 percent. Denominator: 1 + (1 - 0.21) x 0.8 = 1 + 0.632 = 1.632. Unlevered: 1.4 / 1.632 = 0.858. Debt effect: 1.4 - 0.858 = 0.542 of beta points from debt. Relever check: 0.858 x 1.632 = 1.40, back where we started. The business itself is less risky than the market (0.858 < 1.0); the stock looks aggressive purely because of the capital structure.
The Real Use: Bottom-Up Beta
Professionals rarely trust a single regression beta. Instead they unlever the betas of comparable companies, take the median asset beta as the industry's business risk, then relever it at the target company's capital structure. This bottom-up beta is stabler than any single stock's regression and is the standard input to CAPM cost of equity in DCF valuations. Our WACC calculator takes it from there, and the Treynor calculator shows beta's other life in performance measurement.
Limitations
Hamada assumes debt is risk-free and permanent, the tax shield is certain, and D/E stays constant: all approximations. Use market-value D/E; book values distort for companies whose equity has moved. For financial firms, where debt is raw material rather than borrowing, unlevering is misleading and analysts use different approaches. And betas themselves are backward-looking regressions; unlevering a noisy beta gives a precise-looking but still noisy asset beta.
Beta for Private Companies
Private companies have no stock price, so they have no regression beta; bottom-up beta is the standard workaround. Pick 5 to 10 listed comparables, unlever each one's beta with this calculator, take the median asset beta as the industry's operating risk, then relever at the private company's target (not current) capital structure. A private manufacturer valued against listed peers might land on an asset beta of 0.9, relevered at 40 percent debt to an equity beta near 1.2.
Three adjustments for private reality. First, add a size premium: small private firms are riskier than listed mid-caps, and valuation practice adds 2 to 4 percent to the cost of equity. Second, consider a company-specific risk premium for customer concentration or key-person dependence. Third, use target debt levels, not today's: many private firms carry less debt than their optimal structure implies, and valuing them at today's debt understates their equity risk. Document every assumption; private valuations get challenged, and the beta build is where challengers look first.
Common Beta Traps
The Hamada equation is simple; the inputs are where valuations go wrong. Raw regression betas are noisy: a two-year monthly regression against the local index is standard, but thinly traded stocks produce stale betas that understate risk. Bloomberg's adjusted beta (0.67 x raw + 0.33 x 1.0) pulls extremes toward the market mean, which helps noisy estimates but smuggles in an assumption. Always check the regression's R-squared: a beta with an R-squared of 0.1 is barely measuring anything.
Debt definitions trip up the D/E input. Use market values: market cap for equity, and for debt the book value is usually close enough since most corporate debt trades near par. Net debt (minus cash) versus gross debt changes the answer materially for cash-rich firms; match your choice to your WACC definition. And unlever with the tax rate the firm actually faces: a multinational's blended rate, not the US statutory 21 percent, unless US operations dominate.
Risk, Stripped of Financing
Unlevered beta is the cleanest measure of a business's systematic risk: the operating risk with the financing noise removed. Unlever carefully with market-value D/E and the right tax rate, compare asset betas across peers, and relever at target debt levels for your cost of equity. Done right, it turns a noisy regression output into a defensible valuation input; done sloppily, it smuggles debt assumptions into the discount rate.
Estimates for planning only, not financial advice.
Frequently Asked Questions
What is unlevered beta?
A company's beta with the effect of debt financing removed, showing the systematic risk of the underlying business assets. Computed via the Hamada equation from equity beta, D/E, and the tax rate. Also called asset beta. Two firms in the same industry can have wildly different equity betas purely because one is levered; their asset betas should converge.
How do you calculate unlevered beta?
Divide levered beta by (1 + (1 - tax rate) x D/E). With beta 1.4, D/E 0.8, tax 21%: 1.4 / (1 + 0.79 x 0.8) = 1.4 / 1.632 = 0.858. The 0.79 is one minus the tax rate: the debt tax shield softens debt's risk effect, so higher taxes mean less beta amplification per unit of debt.
What is the difference between levered and unlevered beta?
Levered (equity) beta includes the risk magnification from debt; unlevered (asset) beta reflects only operating risk. The same business has one asset beta but different equity betas at different debt levels. Think of debt as a volume knob on the same underlying business risk: more debt turns the equity beta up, less turns it down.
Why unlever beta?
To compare business risk across companies with different capital structures, and to build bottom-up betas for valuation: unlever peers' betas, take the median, relever at your target D/E. It separates operating risk from financing decisions. A utility and a software firm with identical equity betas have very different asset betas; unlevering reveals which business is actually riskier.
What is the Hamada equation?
The formula linking levered and unlevered beta through the debt tax shield: Ξ²L = Ξ²U x (1 + (1-T) x D/E). It assumes risk-free perpetual debt; practical and standard despite the strong assumptions. Robert Hamada published it in 1972, merging Modigliani-Miller capital structure theory with the CAPM; it remains the default in every valuation textbook.
Should I use book or market D/E?
Market values for valuation work: market cap for equity, market or book value of debt. Book equity can be wildly stale after price moves, which distorts the unlevered beta. Use book only when market values are unavailable. For debt, book value is usually a fine proxy since most corporate debt trades near par; for equity it is not.
Can unlevered beta exceed levered beta?
No, with positive debt: unlevering always reduces beta since the denominator exceeds 1. With zero debt they are equal. A computed unlevered beta above levered signals a data error (often negative book equity). The most common culprit is a D/E pulled from a screener using negative book equity, which flips the sign of the ratio.
What tax rate should I use?
The marginal corporate rate the company actually faces (21% US federal, adjusted for state taxes or use the effective rate for multinationals). The tax shield term matters most for highly levered firms. For unlevered targets like early-stage startups the tax rate barely matters, but get it right for LBO-style capital structures where D/E exceeds 2.
How does unlevered beta feed into WACC?
Relever the industry asset beta at the company's target capital structure to get cost of equity via CAPM, then weight with after-tax cost of debt. Bottom-up beta plus target structure is the standard DCF cost-of-capital build. Using the company's current (possibly temporary) debt load instead of target debt levels is the classic error that misstates the cost of equity.
Does unlevered beta work for banks?
Poorly. For financial firms debt is inventory, not borrowing, so stripping it misdescribes the business. Analysts typically use equity betas directly or segment-level approaches for banks and insurers. Damodaran's datasets exclude financials from unlevered-beta tables for exactly this reason; use his financial-services betas, which are equity betas by construction.