Taxes, Leverage, and the Cost of Equity Capital
50 Pages Posted: 11 Nov 2005
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Taxes, Leverage, and the Cost of Equity Capital
Taxes, Leverage, and the Cost of Equity Capital
Date Written: November 2005
Abstract
We examine the associations between leverage, corporate and investor level taxes, and the firm's implied cost of equity capital. Expanding on Modigliani and Miller [1958,1963], the cost of equity capital can be expressed as a function of leverage and corporate and investor level taxes. This expression predicts that the cost of equity is increasing in leverage, but that corporate taxes mitigate this leverage related risk premium, while the personal tax disadvantage of debt increases this premium. We empirically test these predictions using implied cost of equity estimates and proxies for the firm's corporate tax rate and the personal tax disadvantage of debt. Our results suggest that the equity risk premium associated with leverage is decreasing in the corporate tax benefit from debt. We find some evidence that the equity risk premium associated with leverage is increasing in the personal tax penalty associated with debt.
Keywords: Capital structure, Cost of capital, Tax
JEL Classification: G12, G32, H24, H25
Suggested Citation: Suggested Citation
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