(a) In general. The loss carryforwards allowed as deductions against net recognized built-in gain under section 1374(b)(2) are allowed only to the extent their use is allowed under the rules applying to C corporations. Any other loss carryforwards, such as charitable contribution carryforwards under section 170(d)(2), are not allowed as deductions against net recognized built-in gain.
(b) Example. The rules of this section are illustrated by the following example.
X is a C corporation that has an ownership change under section 382(g)(1) on January 1, 1994. On that date, X has a fair market value of $500,000, NOL carryforwards of $400,000, and a net unrealized built-in gain under section 382(h)(3)(A) of $0. Assume X's section 382 limitation under section 382(b)(1) is $40,000. X elects to become an S corporation on January 1, 1998. On that date, X has NOL carryforwards of $240,000 (having used $160,000 of its pre-change net operating losses in its 4 preceding taxable years) and a section 1374 net unrealized built-in gain of $250,000. In 1998, X has net recognized built-in gain of $100,000. X may use $40,000 of its NOL carryforwards as a deduction against its $100,000 net recognized built-in gain, because X's section 382 limitation is $40,000.
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