#### § 1.1374-3 Net unrealized built-in gain.

(a) *In general.* An S corporation's net unrealized built-in gain is the total of the following—

(1) The amount that would be the amount realized if, at the beginning of the first day of the recognition period, the corporation had remained a C corporation and had sold all its assets at fair market value to an unrelated party that assumed all its liabilities; decreased by

(2) Any liability of the corporation that would be included in the amount realized on the sale referred to in paragraph (a)(1) of this section, but only if the corporation would be allowed a deduction on payment of the liability; decreased by

(3) The aggregate adjusted bases of the corporation's assets at the time of the sale referred to in paragraph (a)(1) of this section; increased or decreased by

(4) The corporation's section 481 adjustments that would be taken into account on the sale referred to in paragraph (a)(1) of this section; and increased by

(5) Any recognized built-in loss that would not be allowed as a deduction under section 382, 383, or 384 on the sale referred to in paragraph (a)(1) of this section.

(b) *Adjustment to net unrealized built-in gain* —

(1) *In general.* If section 1374(d)(8) applies to an S corporation's acquisition of assets, some or all of the stock of the corporation from which such assets were acquired was taken into account in the computation of the net unrealized built-in gain for a pool of assets of the S corporation, and some or all of such stock is redeemed or canceled in such transaction, then, subject to the limitations of paragraph (b)(2) of this section, such net unrealized built-in gain is adjusted to eliminate any effect that any built-in gain or built-in loss in the redeemed or canceled stock (other than stock with respect to which a loss under section 165 is claimed) had on the initial computation of net unrealized built-in gain for that pool of assets. For purposes of this paragraph, stock described in section 1374(d)(6) shall be treated as taken into account in the computation of the net unrealized built-in gain for a pool of assets of the S corporation.

(2) *Limitations on adjustment* —

(i) *Recognized built-in gain or loss.* Net unrealized built-in gain for a pool of assets of the S corporation is only adjusted under paragraph (b)(1) of this section to reflect built-in gain or built-in loss in the redeemed or canceled stock that has not resulted in recognized built-in gain or recognized built-in loss during the recognition period.

(ii) *Anti-duplication rule.* Paragraph (b)(1) of this section shall not be applied to duplicate an adjustment to the net unrealized built-in gain for a pool of assets made pursuant to paragraph (b)(1) of this section.

(3) *Effect of adjustment.* Any adjustment to the net unrealized built-in gain made pursuant to this paragraph (b) only affects computations of the amount subject to tax under section 1374 for taxable years that end on or after the date of the acquisition to which section 1374(d)(8) applies.

(4) *Pool of assets.* For purposes of this section, a pool of assets means—

(i) The assets held by the corporation on the first day it became an S corporation, if the corporation was previously a C corporation; or

(ii) The assets the S corporation acquired from a C corporation in a section 1374(d)(8) transaction.

(c) *Examples.* The following examples illustrate the rules of this section:

# Example 1. Computation of net unrealized built-in gain.

(i)(A) X, a calendar year C corporation using the cash method, elects to become an S corporation on January 1, 1996. On December 31, 1995, X has assets and liabilities as follows:

| Assets | FMV | Basis |
| --- | --- | --- |
| Factory | $500,000 | $900,000 |
| Accounts Receivable | 300,000 | 0 |
| Goodwill | 250,000 | 0 |
| Total | 1,050,000 | 900,000 |

| Liabilities | Amount |
| --- | --- |
| Mortgage | $200,000 |
| Accounts Payable | 100,000 |
| Total | 300,000 |

(B) Further, X must include a total of $60,000 in taxable income in 1996, 1997, and 1998 under section 481(a).

(ii) If, on December 31, 1995, X sold all its assets to a third party that assumed all its liabilities, X's amount realized would be $1,050,000 ($750,000 cash received + $300,000 liabilities assumed = $1,050,000). Thus, X's net unrealized built-in gain is determined as follows:

| Amount realized | $1,050,000 |
| --- | --- |
| Deduction allowed (A/P) | (100,000) |
| Basis of X's assets | (900,000) |
| Section 481 adjustments | 60,000 |
| Net unrealized built-in gain | 110,000 |

# Example 2. Adjustment to net unrealized built-in gain for built-in gain in eliminated C corporation stock.

(i) X, a calendar year C corporation, elects to become an S corporation effective January 1, 2005. On that date, X's assets (the first pool of assets) have a net unrealized built-in gain of $15,000. Among the assets in the first pool of assets is all of the outstanding stock of Y, a C corporation, with a fair market value of $33,000 and an adjusted basis of $18,000. On March 1, 2009, X sells an asset that it owned on January 1, 2005, and as a result has $10,000 of recognized built-in gain. X has had no other recognized built-in gain or built-in loss. X's taxable income limitation for 2009 is $50,000. Effective June 1, 2009, X elects under section 1361 to treat Y as a qualified subchapter S subsidiary (QSub). The election is treated as a transfer of Y's assets to X in a liquidation to which sections 332 and 337(a) apply.

(ii) Under paragraph (b) of this section, the net unrealized built in-gain of the first pool of assets is adjusted to account for the elimination of the Y stock in the liquidation. The net unrealized built-in gain of the first pool of assets, therefore, is decreased by $15,000, the amount by which the fair market value of the Y stock exceeded its adjusted basis as of January 1, 2005. Accordingly, for taxable years ending after June 1, 2009, the net unrealized built-in gain of the first pool of assets is $0.

(iii) Under § 1.1374-2(a), X's net recognized built-in gain for any taxable year equals the least of X's pre-limitation amount, taxable income limitation, and net unrealized built-in gain limitation. In 2009, X's pre-limitation amount is $10,000, X's taxable income limitation is $50,000, and X's net unrealized built-in gain limitation is $0. Because the net unrealized built-in gain of the first pool of assets has been adjusted to $0, despite the $10,000 of recognized built-in gain in 2009, X has $0 net recognized built-in gain for the taxable year ending on December 31, 2009.

# Example 3. Adjustment to net unrealized built-in gain for built-in loss in eliminated C corporation stock.

(i) X, a calendar year C corporation, elects to become an S corporation effective January 1, 2005. On that date, X's assets (the first pool of assets) have a net unrealized built-in gain of negative $5,000. Among the assets in the first pool of assets is 10 percent of the outstanding stock of Y, a C corporation, with a fair market value of $18,000 and an adjusted basis of $33,000. On March 1, 2009, X sells an asset that it owned on January 1, 2005, resulting in $8,000 of recognized built-in gain. X has had no other recognized built-in gains or built-in losses. X's taxable income limitation for 2009 is $50,000. On June 1, 2009, Y transfers its assets to X in a reorganization under section 368(a)(1)(C).

(ii) Under paragraph (b) of this section, the net unrealized built in-gain of the first pool of assets is adjusted to account for the elimination of the Y stock in the reorganization. The net unrealized built-in gain of the first pool of assets, therefore, is increased by $15,000, the amount by which the adjusted basis of the Y stock exceeded its fair market value as of January 1, 2005. Accordingly, for taxable years ending after June 1, 2009, the net unrealized built-in gain of the first pool of assets is $10,000.

(iii) Under § 1.1374-2(a), X's net recognized built-in gain for any taxable year equals the least of X's pre-limitation amount, taxable income limitation, and net unrealized built-in gain limitation. In 2009, X's pre-limitation amount is $8,000 and X's taxable income limitation is $50,000. The net unrealized built-in gain of the first pool of assets has been adjusted to $10,000, so X's net unrealized built-in gain limitation is $10,000. X, therefore, has $8,000 net recognized built-in gain for the taxable year ending on December 31, 2009. X's net unrealized built-in gain limitation for 2010 is $2,000.

# Example 4. Adjustment to net unrealized built-in gain in case of prior gain recognition.

(i) X, a calendar year C corporation, elects to become an S corporation effective January 1, 2005. On that date, X's assets (the first pool of assets) have a net unrealized built-in gain of $30,000. Among the assets in the first pool of assets is all of the outstanding stock of Y, a C corporation, with a fair market value of $45,000 and an adjusted basis of $10,000. Y has no current or accumulated earnings and profits. On April 1, 2007, Y distributes $18,000 to X, $8,000 of which is treated as gain to X from the sale or exchange of property under section 301(c)(3). That $8,000 is recognized built-in gain to X under section 1374(d)(3), and results in $8,000 of net recognized built-in gain to X for 2007. X's net unrealized built-in gain limitation for 2008 is $22,000. On June 1, 2009, Y transfers its assets to X in a liquidation to which sections 332 and 337(a) apply.

(ii) Under paragraph (b) of this section, the net unrealized built in-gain of the first pool of assets is adjusted to account for the elimination of the Y stock in the liquidation. The net unrealized built-in gain of that pool of assets, however, can only be adjusted to reflect the amount of built-in gain that was inherent in the Y stock on January 1, 2005 that has not resulted in recognized built-in gain during the recognition period. In this case, therefore, the net unrealized built-in gain of the first pool of assets cannot be reduced by more than $27,000 ($35,000, the amount by which the fair market value of the Y stock exceeded its adjusted basis as of January 1, 2005, minus $8,000, the recognized built-in gain with respect to the stock during the recognition period). Accordingly, for taxable years ending after June 1, 2009, the net unrealized built-in gain of the first pool of assets is $3,000. The net unrealized built-in gain limitation for 2009 is $0.

[T.D. 8579, 59 FR 66464, Dec. 27, 1994, as amended by T.D. 9180, 70 FR 8728, Feb. 23, 2005]