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''Thor Power Tool Company v. Commissioner'', , was a United States Supreme Court case in which the Court upheld IRS regulations limiting how taxpayers could write down inventory. The opinion limited the application of the lower of cost or market method to the two circumstances in the regulations. The taxpayer had reduced the value of its inventory to an amount management asserted was the fair market value, without selling the inventory. In court, the taxpayer argued that its deduction for loss should be allowed for tax purposes because it was permitted for accounting purposes. The Court stated, "There is no presumption that an inventory practice conformable to 'generally accepted accounting principles' is valid for tax purposes. Such a presumption is insupportable in light of the statute, this Court's past decisions, and the differing objectives of tax and financial accounting." The Court's opinion cited, in particular, a lack of evidence presented by the taxpayer to support its loss. Thor manufactured equipment using multiple parts that it produced. It capitalized the costs of these parts when produced. When it had inventories of parts in excess of production needs, it wrote down those inventories, taking a loss based on management judgment. This write-down was in accordance with the company's accounting practice. IRS regulations provided that goods could be written down only if one of two conditions existed: either the taxpayer could demonstrate a market price, or the goods were defective or "subnormal". The Court denied the write-down because Thor did not present evidence to demonstrate a market price of less than its cost and did not show that the parts were subnormal goods. The decision prevents companies from writing down goods simply because they are not selling them.〔Pratt & Kulsrud, ''Federal Taxation'', 2006, p. 10-33. ISBN 978-0-7593-5175-2.〕 ==External links== * 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Thor Power Tool Co. v. Commissioner」の詳細全文を読む スポンサード リンク
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