The correct value of tax shields: An analysis of 23 theories
This paper provides guidelines to evaluate the appropriateness of 23 different valuation methods for estimating the present value of tax shields. We first show that the value of tax shields is the difference between the present values of two different cash flows with their own risks: the present value of taxes for the unlevered company and the present value of taxes for the levered company. This implies, as a first guideline, that, for the particular case of a perpetuity and a world without costs of leverage, the value of tax shields is equal to the tax rate times the value of debt. The value of tax shields can be lower when costs of leverage exist. In that case, we show that, since the existence of leverage costs is independent of taxes, a second guideline for the appropriateness of the valuation method should be that the value of tax shields, when there are no taxes, is negative. We then look at the case of constant growth and derive similar conclusions. Second, we identify 23 valuation theories proposed in the literature to estimate the present value of tax shields and illustrate their performance relative to the proposed guidelines. Eight of these theories do not satisfy the two proposed guidelines for the case of perpetuities. Only one of the valuation methods is consistent with these restrictions when we look at the case of constant growth and no leverage costs. Two theories provide consistent valuations when we allow for leverage costs and growth. Finally, we use the 23 theories to value a hypothetical firm and show remarkable differences in the values obtained, which demonstrates the importance of using a method consistent with the proposed guidelines.
|Date of creation:||13 May 2006|
|Contact details of provider:|| Postal: IESE Business School, Av Pearson 21, 08034 Barcelona, SPAIN|
Web page: http://www.iese.edu/
More information through EDIRC
References listed on IDEAS
Please report citation or reference errors to , or , if you are the registered author of the cited work, log in to your RePEc Author Service profile, click on "citations" and make appropriate adjustments.:
- Miles, James A & Ezzell, John R, 1985. " Reformulating Tax Shield Valuation: A Note," Journal of Finance, American Finance Association, vol. 40(5), pages 1485-1492, December.
- Robert A. Taggart & Jr., 1991. "Consistent valuation and Cost of Capital Expressions With Corporate and Personal Taxes," Financial Management, Financial Management Association, vol. 20(3), Fall.
- Kaplan, Steven N & Ruback, Richard S, 1995.
" The Valuation of Cash Flow Forecasts: An Empirical Analysis,"
Journal of Finance,
American Finance Association, vol. 50(4), pages 1059-1093, September.
- Steven N. Kaplan & Richard S. Ruback, 1994. "The Valuation of Cash Flow Forecasts: An Empirical Analysis," NBER Working Papers 4724, National Bureau of Economic Research, Inc.
- Fernandez, Pablo, 2004. "The value of tax shields is NOT equal to the present value of tax shields," Journal of Financial Economics, Elsevier, vol. 73(1), pages 145-165, July.
- Fernández , Pablo, 2002. "The value of tax shields is not equal to the present value of tax shields," IESE Research Papers D/459, IESE Business School.
- Miller, Merton H, 1977. "Debt and Taxes," Journal of Finance, American Finance Association, vol. 32(2), pages 261-275, May.
- Fernandez, Pablo, 2002. "Valuation Methods and Shareholder Value Creation," Elsevier Monographs, Elsevier, edition 1, number 9780122538414.
- Pablo Fernández, 2007. "Valuing companies by cash flow discounting: ten methods and nine theories," Managerial Finance, Emerald Group Publishing, vol. 33(11), pages 853-876, October.
- Fernández , Pablo, 2002. "Valuing companies by cash flow discounting: Ten methods and nine theories," IESE Research Papers D/451, IESE Business School.
- Miles, James A. & Ezzell, John R., 1980. "The Weighted Average Cost of Capital, Perfect Capital Markets, and Project Life: A Clarification," Journal of Financial and Quantitative Analysis, Cambridge University Press, vol. 15(03), pages 719-730, September.
- Lewellen, Wilbur G. & Emery, Douglas R., 1986. "Corporate Debt Management and the Value of the Firm," Journal of Financial and Quantitative Analysis, Cambridge University Press, vol. 21(04), pages 415-426, December. Full references (including those not matched with items on IDEAS)
When requesting a correction, please mention this item's handle: RePEc:ebg:iesewp:d-0628. See general information about how to correct material in RePEc.
For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: (Noelia Romero)
If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.
If references are entirely missing, you can add them using this form.
If the full references list an item that is present in RePEc, but the system did not link to it, you can help with this form.
If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your profile, as there may be some citations waiting for confirmation.
Please note that corrections may take a couple of weeks to filter through the various RePEc services.