Limitations

The amount of gain excluded from gross income under subsection (a) with respect to any sale or exchange shall not exceed $250,000.

In the case of a husband and wife who make a joint return for the taxable year of the sale or exchange of the property—

(A) $500,000 Limitation for certain joint returns Paragraph (1) shall be applied by substituting “$500,000” for “$250,000” if— (i) either spouse meets the ownership requirements of subsection (a) with respect to such property; (ii) both spouses meet the use requirements of subsection (a) with respect to such property; and (iii) neither spouse is ineligible for the benefits of subsection (a) with respect to such property by reason of paragraph (3).

(B) Other joint returns If such spouses do not meet the requirements of subparagraph (A), the limitation under paragraph (1) shall be the sum of the limitations under paragraph (1) to which each spouse would be entitled if such spouses had not been married. For purposes of the preceding sentence, each spouse shall be treated as owning the property during the period that either spouse owned the property.

Subsection (a) shall not apply to any sale or exchange by the taxpayer if, during the 2-year period ending on the date of such sale or exchange, there was any other sale or exchange by the taxpayer to which subsection (a) applied.

(A) In general Subsection (a) shall not apply to so much of the gain from the sale or exchange of property as is allocated to periods of nonqualified use.

(B) Gain allocated to periods of nonqualified use For purposes of subparagraph (A), gain shall be allocated to periods of nonqualified use based on the ratio which— (i) the aggregate periods of nonqualified use during the period such property was owned by the taxpayer, bears to (ii) the period such property was owned by the taxpayer.

(C) Period of nonqualified use For purposes of this paragraph— (i) In general The term “period of nonqualified use” means any period (other than the portion of any period preceding January 1, 2009 ) during which the property is not used as the principal residence of the taxpayer or the taxpayer’s spouse or former spouse. (ii) Exceptions The term “period of nonqualified use” does not include— (I) any portion of the 5-year period described in subsection (a) which is after the last date that such property is used as the principal residence of the taxpayer or the taxpayer’s spouse, (II) any period (not to exceed an aggregate period of 10 years) during which the taxpayer or the taxpayer’s spouse is serving on qualified official extended duty (as defined in subsection (d)(9)(C)) described in clause (i), (ii), or (iii) of subsection (d)(9)(A), and (III) any other period of temporary absence (not to exceed an aggregate period of 2 years) due to change of employment, health conditions, or such other unforeseen circumstances as may be specified by the Secretary.

(D) Coordination with recognition of gain attributable to depreciation For purposes of this paragraph— (i) subparagraph (A) shall be applied after the application of subsection (d)(6), and (ii) subparagraph (B) shall be applied without regard to any gain to which subsection (d)(6) applies.