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Capital gains tax and the capital asset pricing model

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  • Martin Lally
  • Tony Van Zijl

Abstract

This paper develops a version of the Capital Asset Pricing Model that views dividend imputation as affecting company tax and assumes differential taxation of capital gains and ordinary income. These taxation issues aside, the model otherwise rests on the standard assumptions including full segmentation of national capital markets. It also treats dividend policy as exogenously determined. Estimates of the cost of equity based on this model are then compared with estimates based on the version of the CAPM typically applied in Australia, which differs only in assuming equality of the tax rates on capital gains and ordinary income. The differences between the estimates can be material. In particular, with a high dividend yield, allowance for differential taxation can result in an increase of two to three percentage points in the estimated cost of equity. The overall result obtained here carries over to a dividend equilibrium, in which firms choose a dividend policy that is optimal relative to the assumed tax structure.

Suggested Citation

  • Martin Lally & Tony Van Zijl, 2003. "Capital gains tax and the capital asset pricing model," Accounting and Finance, Accounting and Finance Association of Australia and New Zealand, vol. 43(2), pages 187-210, July.
    • Handle: RePEc:bla:acctfi:v:43:y:2003:i:2:p:187-210
    DOI: 10.1111/1467-629X.00088
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    Cited by:

    1. Martin Lally, 2006. "Regulatory Revenues and the Choice of the CAPM: Australia Versus New Zealand," Australian Journal of Management, Australian School of Business, vol. 31(2), pages 313-331, December.
    2. Lally, Martin & Marsden, Alastair, 2004. "Tax-adjusted market risk premiums in New Zealand: 1931-2002," Pacific-Basin Finance Journal, Elsevier, vol. 12(3), pages 291-310, June.
    3. Martin Lally, 2008. "Relationship between franking credits and the market risk premium: a comment," Accounting and Finance, Accounting and Finance Association of Australia and New Zealand, vol. 48(1), pages 143-151, March.
    4. Michael Dempsey, 2015. "Stock Markets, Investments and Corporate Behavior:A Conceptual Framework of Understanding," World Scientific Books, World Scientific Publishing Co. Pte. Ltd., number p1007, January.
    5. Kai-Wei (Shaun) Siau & Stephen J. Sault & Geoffrey J. Warren & Henk Berkman, 2015. "Are imputation credits capitalised into stock prices?," Accounting and Finance, Accounting and Finance Association of Australia and New Zealand, vol. 55(1), pages 241-277, March.
    6. Mike Dempsey & Graham Partington, 2008. "Cost of capital equations under the Australian imputation tax system," Accounting and Finance, Accounting and Finance Association of Australia and New Zealand, vol. 48(3), pages 439-460, September.
    7. John C. Handley & Krishnan Maheswaran, 2008. "A Measure of the Efficacy of the Australian Imputation Tax System," The Economic Record, The Economic Society of Australia, vol. 84(264), pages 82-94, March.
    8. Giang Truong & Graham Partington & Maurice Peat, 2008. "Cost-of-Capital Estimation and Capital-Budgeting Practice in Australia," Australian Journal of Management, Australian School of Business, vol. 33(1), pages 95-121, June.

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