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The Efficiency Loss of Capital Income Taxation under Imperfect Loss Offset Provisions

Concordia University, Montreal, Quebec, Canada

Panagiotis Tsigaris

Thompson Rivers University, Kamloops, British Columbia, Canada, ptsigaris{at}tru.ca

The importance of capital loss offset provisions in a world of risk is well documented in the tax literature. However, the potential deadweight losses owing to imperfect offset has not been fully explored. This article develops a framework, whereby that investigation can be carried out, and uses numerical simulations to investigate the size of potential losses. The results obtained show that welfare losses owing to the absence of offset provisions could be substantial. Under plausible assumptions about attitudes toward risk and time preference, and with a capital income tax rate of 35 percent, over forty-five cents per dollar of tax revenue raised may be dissipated. In contrast, full loss offset may reduce that loss to approximately twelve cents.

Key Words: capital income taxation under uncertainty • deadweight loss • loss offset provisions

This version was published on November 1, 2009

Public Finance Review, Vol. 37, No. 6, 710-731 (2009)
DOI: 10.1177/1091142109345263


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