Taxpayer Fails in Attempt to Use the Cohan Rule to Obtain a Deduction
In the case of Fagenboym v. Commissioner [1] we see a taxpayer unsuccessfully attempt to make use of the most-cited case in federal income tax cases—the case of Cohan v. Commissioner, 39 F.2d 540 (2d Cir. 1930).
For those who aren’t familiar with the Cohan case, the case involved vaudeville producer and entertainer George M. Cohan and produced what is often referred to as the Cohan doctrine or rule. The opinion summarizes this rule as follows:
Under the Cohan rule, when a taxpayer establishes that he or she has incurred a deductible expense, but is unable to substantiate the exact amount, the Court is permitted to estimate the deductible amount. Id. at 543-544. But we can do so only to estimate the amount of the deductible expense when the taxpayer provides evidence sufficient to establish a rational basis upon which the estimate can be made. See Vanicek v. Commissioner, 85 T.C. 731, 743 (1985). In estimating the amount allowable the Court bears heavily upon the taxpayer who failed to maintain required records and to substantiate expenses as the Code requires. See Cohan v. Commissioner, 39 F.2d at 544; Keenan v. Commissioner, T.C. Memo. 2006-45, aff’d, 233 F. App’x 719 (9th Cir. 2007).[2]
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