Practitioner Guide | Corporate Tax | M&A Structuring
How the IRC 332/336/337 regime works, when it applies versus IRC 331, how basis carries over under IRC 334, Form 966 compliance requirements, and the post-OBBBA bonus depreciation tradeoff for asset-heavy subsidiaries.
Last reviewed: July 2026 | Americas Tax Editorial Team
The complete liquidation of a corporation can be structured as either a taxable event under IRC 331 or a nonrecognition event under the IRC 332/336/337 regime, depending on whether the liquidating company is a subsidiary being dissolved into an 80%-or-more parent. Getting the characterization right determines whether gain is recognized immediately at both the corporate and shareholder level, or whether tax is deferred through a carryover basis structure.
Under IRC 331, a shareholder who receives a distribution in complete liquidation of a corporation treats that distribution as full payment in exchange for the stock surrendered. The shareholder recognizes capital gain or loss equal to the difference between the amount distributed (including any assumed liabilities) and the adjusted basis of the stock given up. For shareholders other than corporations qualifying under IRC 332, this is the default rule.
At the corporate level, IRC 336 applies: the distributing corporation is treated as if it sold each asset at fair market value (FMV) on the date of distribution, recognizing gain or loss accordingly. The corporation pays tax on that gain in its final return. The shareholders then take FMV basis in the assets received under IRC 334(a).
IRC 332 carves out an important exception when the shareholder is a corporation that owns at least 80% of the liquidating subsidiary by vote and value. In that case, neither the parent (under IRC 332) nor the subsidiary (under IRC 337) recognizes gain or loss on the liquidation. The parent instead takes the subsidiary's carryover basis in the assets received under IRC 334(b), and the subsidiary's tax attributes (NOLs, E&P, accounting methods) carry over to the parent under IRC 381.
The tradeoff is straightforward in concept: the parent defers gain recognition but also defers the tax cost. The assets arrive at carryover basis, not FMV, which has grown more significant since the OBBBA reinstated 100% bonus depreciation. Practitioners must now model this tradeoff quantitatively, not just structurally, before recommending a route.
IRC 332 nonrecognition is not automatic: four conditions must all be satisfied. Practitioners should verify each element at IRC 332(b) and IRS.gov before the plan of liquidation is adopted, because a failure to qualify forfeits the nonrecognition treatment retroactively.
The parent must own stock of the subsidiary possessing at least 80% of the total combined voting power of all classes of stock entitled to vote, AND stock representing at least 80% of the total value of all classes of outstanding stock. Both the voting-power prong and the value prong must be satisfied independently. Preferred stock that participates in corporate growth beyond a fixed return is counted toward the value prong.
The 80% control test is measured continuously: the parent must satisfy it from the date the plan of complete liquidation is adopted through the date the final liquidating distribution is made. A reduction below 80% at any point during that window disqualifies IRC 332 for the period of noncompliance. Verify the specific measurement rules and any minority interest arrangements at IRC 332(b) before the plan is adopted.
Critical Compliance: Continuous 80% Ownership Requirement
If the parent's ownership falls below the 80% vote-and-value threshold at any point after adopting the plan of liquidation and before the liquidation is complete, IRC 332 nonrecognition is lost for that period. Transactions that dilute the parent's interest, such as the exercise of minority warrants or a partial redemption, can trigger this disqualification. Verify the continuous-ownership requirement at IRC 332(b) and IRS.gov before the plan is adopted and before any transaction that could affect ownership percentages during the liquidation window.
The parent and subsidiary must formally adopt a plan of complete liquidation. The plan must contemplate the complete cancellation or redemption of all stock of the subsidiary. A partial liquidation does not qualify under IRC 332. The board resolution or shareholder vote adopting the plan is the triggering event for both the IRC 332 timeline and the Form 966 30-day filing deadline.
Under IRC 332(b)(3), the liquidation must be completed either (a) within the same taxable year in which the plan is adopted, or (b) within 3 years following the close of the taxable year in which the plan is adopted. Distributions in partial satisfaction before the plan is adopted do not count. If the 3-year window expires before the liquidation is complete, IRC 332 treatment is lost. Verify the applicable timeline at IRC 332(b)(3) and IRS.gov for any open-year liquidation.
All stock of the subsidiary must be cancelled or redeemed as part of the liquidation. IRC 332 does not permit the parent to retain any equity interest in the subsidiary after the process is complete. The subsidiary must cease to exist as a separate entity in the final step.
Where an IRC 332 liquidation qualifies, the subsidiary's nonrecognition protection comes from IRC 337: no gain or loss is recognized by the liquidating subsidiary on the distribution of property to its 80% corporate parent. This is a necessary complement to IRC 332, because without it the subsidiary would recognize gain under IRC 336 on every distribution of appreciated property, even though the parent recognizes no gain at receipt.
IRC 337 nonrecognition is limited strictly to distributions made to the qualifying 80% parent. Distributions to minority shareholders are not covered by IRC 337. For each distribution to a minority shareholder, the subsidiary must apply IRC 336 and recognize gain (or loss, subject to the IRC 336(d)(2) limitations) as if it sold the distributed property at FMV. This means a subsidiary with both a majority parent and minority shareholders must track every distribution and apply the correct rule to each recipient class.
IRC 337 nonrecognition does not override certain statutory recapture rules. Practitioners should verify whether LIFO inventory recapture under IRC 1363(d) or other asset-specific recapture provisions apply to assets being distributed, even in an otherwise qualifying IRC 332/337 liquidation. Verify these exceptions at the applicable IRC sections and applicable Treasury regulations before completing the distribution.
IRC 336 is the default rule for corporate-level gain recognition in a complete liquidation: the distributing corporation recognizes gain or loss as if it sold each distributed asset at its FMV on the date of distribution. In an IRC 332 liquidation, IRC 336 is overridden by IRC 337 for distributions to the 80% parent, but IRC 336 applies in full to distributions to minority shareholders.
Not all losses on liquidating distributions are recognizable. IRC 336(d)(2) disallows losses on distributions of property that was contributed to the subsidiary in a transaction where the primary purpose was to create a tax loss on the liquidation. Specifically, if property is contributed to the subsidiary and the adjusted basis of the property at contribution exceeds its FMV at that time, the built-in loss is disallowed on the subsequent liquidating distribution. This anti-stuffing rule prevents taxpayers from contributing loss property to a subsidiary immediately before liquidation in order to generate a recognizable corporate-level loss.
Planning Note: IRC 336(d)(2) Loss Disallowance
Losses on built-in loss property contributed to the subsidiary in a transaction where the adjusted basis exceeded FMV at contribution are disallowed on liquidating distributions under IRC 336(d)(2). This rule applies regardless of when the liquidation occurs relative to the contribution, if the requisite purpose is present. Verify the loss disallowance rules at IRC 336(d)(2) and the applicable Treasury regulations before claiming any loss on a liquidating distribution, particularly where property was contributed to the subsidiary within a few years of the liquidation.
The basis consequences of a complete liquidation depend entirely on which regime governs the transaction.
In a taxable IRC 331 liquidation, the shareholder takes a basis in the assets received equal to their FMV at the time of distribution. This is the standard "cost basis" rule: because the shareholder recognized gain or loss on the liquidating distribution as a deemed sale, the assets step up (or down) to FMV as the new holding period begins. This FMV basis is the foundation for the post-OBBBA bonus depreciation opportunity discussed in Section 9.
In an IRC 332 liquidation, the parent takes a carryover basis in each asset received from the subsidiary: each asset retains the same adjusted basis it had in the subsidiary's hands, with no step-up or step-down to FMV. The parent also inherits the subsidiary's holding period in each asset. Verify the full carryover basis rules, including any special allocation rules for liabilities assumed, at IRC 334(b) and IRS.gov.
The carryover basis result means the parent neither pays tax on the subsidiary's built-in gains at liquidation nor receives the benefit of a fresh FMV basis in those assets. The appreciation that was built up in the subsidiary's hands travels forward to the parent, to be taxed when the parent eventually sells the asset.
One of the significant benefits of an IRC 332 liquidation (compared to a taxable IRC 331 liquidation or an asset purchase) is the carryover of the subsidiary's tax attributes under IRC 381. In a taxable transaction structured as an asset purchase or a deemed asset acquisition under IRC 338, the buyer acquires only the assets, not the tax history. In an IRC 332 liquidation, the parent absorbs the subsidiary's entire tax profile.
IRC 381(c) lists the tax attributes that the parent acquires from the subsidiary in an IRC 332 liquidation. Key items include: net operating loss (NOL) carryforwards, capital loss carryforwards, earnings and profits (or deficit in E&P), method of accounting, installment obligations, the general business credit carryover, and other specified attributes. The carryover occurs as of the date of distribution of substantially all the subsidiary's assets (the "date of distribution" under the IRC 381 regulations).
The right to use inherited NOLs is not unlimited. If the subsidiary experienced an ownership change (as defined in IRC 382) before the liquidation, the subsidiary's pre-change NOLs are subject to an annual IRC 382 limitation. That limitation equals the value of the subsidiary's stock immediately before the ownership change multiplied by the long-term tax-exempt rate. NOLs that cannot be used in a given year due to the limitation carry forward; they are not permanently lost. But in a high-value subsidiary, the annual limitation can substantially reduce the present value of the inherited NOL portfolio.
Planning Note: IRC 382 Limitation on Inherited NOLs
The parent acquires the subsidiary's NOL carryforwards on an IRC 332 liquidation under IRC 381, but those NOLs may be subject to an IRC 382 annual limitation if the subsidiary experienced an ownership change before the liquidation. Verify the IRC 382 testing period, identify any prior ownership changes, and model the applicable annual limitation before including inherited NOLs in the parent's tax projection. An IRC 382 limitation that reduces the effective NOL value can shift the economics of the 332 route meaningfully. Verify the rules at IRC 381, IRC 382, and IRS.gov.
Form 966 (Corporate Dissolution or Liquidation) is not optional for a corporation that adopts a plan of complete liquidation. IRC 6043(a) requires every corporation that adopts such a plan to file Form 966 with the IRS. Practitioners who miss this step on behalf of a client expose that client to penalties.
The filing deadline for Form 966 is 30 days after the date the plan of complete liquidation is adopted. Critically, the 30-day clock runs from the board adoption date, not from the date of the first liquidating distribution and not from the final distribution date. A corporation that distributes assets months after board approval has already started the Form 966 clock at the board meeting. Verify the current deadline and any IRS guidance on late-filing relief at IRS.gov before any plan is adopted.
A certified copy of the plan of complete liquidation (or the resolution adopting it) must be attached to Form 966. The IRS reviews this attachment to confirm that a formal plan exists and that the liquidation timeline is consistent with the requirements of IRC 332(b)(3). Practitioners should ensure the board resolution or shareholder vote is in writing and duly certified before the Form 966 is filed.
Critical Deadline: Form 966 Must Be Filed Within 30 Days of Plan Adoption
Failure to file Form 966 within 30 days of adopting the plan of liquidation exposes the corporation to penalties under IRC 6043. The 30-day deadline runs from the board adoption date, not from the first distribution date. A corporation that holds its board meeting in January but does not make its first distribution until March has a January-based Form 966 deadline. Verify the current form requirements, the appropriate IRS service center, and any late-filing relief at IRS.gov before the plan is adopted. Do not let the distribution timeline obscure the earlier filing trigger.
The IRC 332 nonrecognition regime and the IRC 338/336(e) election regime are mutually exclusive for the same transaction. Understanding their interaction is essential in post-acquisition integration planning, where the structuring choice between the two routes has lasting consequences for both tax cost and asset basis.
When a qualified stock acquisition occurs and an IRC 338(h)(10) election (for consolidated group members or S-corporation targets) or IRC 336(e) election (for targets in which the seller holds 80% or more) is made, the transaction is treated as a deemed asset sale by the subsidiary followed by a deemed liquidation. The subsidiary is treated as having sold all of its assets at the "adjusted grossed-up basis" (or "aggregate deemed sale price") at FMV, recognizing gain in the deemed sale. The parent or purchaser then takes FMV basis in the assets. In this structure, IRC 332 nonrecognition does not apply because the deemed liquidation step is treated as a taxable event specifically to deliver the FMV step-up.
The key decision in post-acquisition integration is whether to elect out of IRC 332 treatment (by making a 338(h)(10) or 336(e) election to get the FMV step-up) or to proceed with a tax-free IRC 332 liquidation (preserving nonrecognition but taking carryover basis). The OBBBA's reinstatement of 100% bonus depreciation has materially shifted this analysis for asset-heavy subsidiaries, as described in Section 9. Practitioners who advise on IRC 338 elections should cross-reference the interaction with IRC 332 at each step of the integration timeline. See the IRC 338 practitioner guide linked in the Related Guides section for the deemed asset sale mechanics.
The One Big Beautiful Bill Act (OBBBA) reinstated 100% bonus depreciation for qualified property placed in service after the applicable effective date under IRC 168(k). This legislative development has materially changed the economics of several corporate restructuring choices, including the election between a taxable IRC 331 liquidation (with its FMV step-up) and a tax-free IRC 332 liquidation (with its carryover basis).
In a taxable IRC 331 liquidation, the parent takes FMV basis in the assets received (IRC 334(a)). For assets that are qualified property under IRC 168(k), including machinery, equipment, and certain depreciable real property improvements, that FMV basis is immediately depreciable at 100% in the year the assets are placed in service. The first-year deduction from the step-up on appreciated assets can be substantial. For an asset-heavy subsidiary with significant built-in appreciation, the bonus depreciation benefit to the parent can materially offset the tax cost the subsidiary pays on recognizing that gain under IRC 336.
In a tax-free IRC 332 liquidation, the parent takes carryover basis in the assets (IRC 334(b)). There is no step-up to FMV and therefore no incremental bonus depreciation on the appreciated value. The parent depreciates each asset from its carryover basis, just as the subsidiary was depreciating it. The built-in appreciation travels forward untaxed but also without any immediate deduction benefit.
Planning Note: OBBBA Bonus Depreciation Requires Fact-Specific Modeling
The value of the FMV step-up in a taxable IRC 331 liquidation is significantly higher post-OBBBA because of 100% first-year bonus depreciation under IRC 168(k). However, the tax cost to the subsidiary (gain recognition under IRC 336) must be modeled against the parent's bonus depreciation benefit on a present-value basis. The analysis turns on the subsidiary's effective tax rate, the parent's effective tax rate, the proportion of assets that are qualified property eligible for bonus depreciation, the amount of built-in appreciation, and the availability of the IRC 382-limited NOLs that would carry over in an IRC 332 route. No universal rule applies: the correct answer is fact-specific and must be modeled for each target.
For every M&A or post-acquisition integration engagement involving a subsidiary liquidation, practitioners should now run a side-by-side model of:
The OBBBA bonus depreciation interaction is also the subject of the IRC 338 practitioner guide, which covers the 338(h)(10) and 336(e) mechanics in detail. Cross-referencing that guide before recommending any liquidation route is strongly advised for asset-heavy M&A engagements.
Practitioner Protocol: Pre-Recommendation Checklist
Before recommending an IRC 332 liquidation to a client, model all four of the following: (1) the IRC 382 carryover NOL limitation, measured against any prior ownership changes in the subsidiary; (2) the Form 966 filing deadline running from the board adoption date, to avoid IRC 6043 penalties; (3) whether any distributions will go to minority shareholders, which triggers IRC 336 gain recognition at the corporate level for those distributions regardless of the IRC 332 qualification; and (4) the OBBBA bonus depreciation tradeoff between the carryover-basis IRC 332 route and the FMV-step-up IRC 331 route. The IRC 332 route saves gain recognition but forfeits the post-OBBBA step-up value that is now substantially higher with 100% bonus depreciation available. Present the complete model to the client before choosing the route.
The table below contrasts the key tax consequences of a taxable IRC 331 complete liquidation with an IRC 332 parent-subsidiary nonrecognition liquidation across ten dimensions relevant to practitioner planning.
| IRC Provision / Item | IRC 331 Taxable Liquidation | IRC 332 Parent-Subsidiary Nonrecognition |
|---|---|---|
| 1. Shareholder gain/loss recognition | Shareholder recognizes capital gain or loss: liquidating distribution treated as full payment for stock surrendered (IRC 331) | 80%-or-more parent recognizes no gain or loss on receipt of subsidiary assets (IRC 332) |
| 2. Corporate-level gain recognition | Distributing corporation recognizes gain or loss as if assets sold at FMV (IRC 336) | No gain or loss at subsidiary level on distributions to qualifying 80% parent (IRC 337); gain recognized on distributions to minority shareholders (IRC 336) |
| 3. Basis in assets received | Shareholder takes FMV basis in assets received (IRC 334(a)) | Parent takes carryover basis from subsidiary, no step-up to FMV (IRC 334(b)) |
| 4. Tax attribute carryover | No carryover: buyer acquires assets only, not subsidiary's tax history | Parent acquires subsidiary's NOLs, capital losses, E&P, accounting methods, and other IRC 381 attributes |
| 5. Holding period for assets received | New holding period begins at date of distribution (FMV basis = tacked cost basis for new owner) | Parent inherits subsidiary's holding period in each asset (carryover basis carries with it) |
| 6. Form 966 required | Yes: Form 966 must be filed within 30 days of adopting the plan (IRC 6043(a)) | Yes: Form 966 must be filed within 30 days of adopting the plan (IRC 6043(a)); same requirement applies |
| 7. Timeline for completion of liquidation | No statutory completion deadline under IRC 331 alone; practical completion required | Must complete within the same taxable year or within 3 years following close of the year the plan is adopted (IRC 332(b)(3)) |
| 8. Minority shareholder treatment | All shareholders are treated the same: each recognizes gain/loss under IRC 331; corporation recognizes gain under IRC 336 on all distributions | IRC 337 nonrecognition applies only to distributions to the 80% parent; minority shareholders remain taxable under IRC 331, and the subsidiary recognizes gain under IRC 336 on those distributions |
| 9. Post-OBBBA bonus depreciation opportunity | High: FMV basis under IRC 334(a) qualifies for 100% bonus depreciation under IRC 168(k) on qualified property; first-year deduction can be substantial on appreciated assets | None on the built-in appreciation: carryover basis under IRC 334(b) provides no step-up, so no incremental bonus depreciation on appreciated value |
| 10. IRC 338/336(e) interaction | IRC 331 is essentially the economic outcome of a 338(h)(10) or 336(e) election: deemed asset sale at FMV with gain recognition and FMV basis to parent | An IRC 338(h)(10) or 336(e) election overrides IRC 332 nonrecognition: the transaction is treated as a deemed asset sale, producing FMV basis and gain recognition instead of carryover basis and nonrecognition |
What is the difference between an IRC 331 taxable liquidation and an IRC 332 nonrecognition liquidation?
Under IRC 331, a shareholder treats a liquidating distribution as full payment in exchange for stock, recognizing capital gain or loss on the difference between the distribution amount and the shareholder's stock basis. The distributing corporation also recognizes gain or loss under IRC 336 as if it sold its assets at FMV. Under IRC 332, when an 80%-or-more parent corporation liquidates a qualifying subsidiary, neither the parent (IRC 332) nor the subsidiary (IRC 337) recognizes gain or loss. The parent takes carryover basis in the assets under IRC 334(b) rather than an FMV step-up, and the subsidiary's tax attributes carry to the parent under IRC 381.
What is the 80% control test under IRC 332 and how is it measured?
To qualify for IRC 332 nonrecognition, the parent must own stock possessing at least 80% of the total combined voting power of all classes of stock entitled to vote AND stock representing at least 80% of the total value of all outstanding stock of the subsidiary. This ownership must be maintained continuously from the date the plan of complete liquidation is adopted through the completion of the liquidation. Verify the specific measurement rules and any exceptions at IRC 332(b) and IRS.gov before advising a client.
Does the liquidating subsidiary recognize gain or loss on distributions to its parent under IRC 332?
No. Under IRC 337, a subsidiary that distributes property to its 80% corporate parent in a complete liquidation qualifying under IRC 332 recognizes no gain or loss on that distribution. However, IRC 337 nonrecognition applies only to distributions to the 80% parent. Distributions to minority shareholders are taxable at the corporate level under IRC 336: the distributing corporation recognizes gain (or loss, subject to the IRC 336(d)(2) limitation) as if it sold that property at FMV.
What basis does the parent take in the subsidiary's assets after an IRC 332 liquidation?
Under IRC 334(b), the parent takes a carryover basis in the assets received from the subsidiary. Each asset retains the same adjusted basis it had in the subsidiary's hands immediately before the distribution; there is no FMV step-up (and no step-down). The parent also inherits the subsidiary's holding period in each asset. This carryover basis is a key distinction from a taxable IRC 331 liquidation, where the shareholder takes FMV basis under IRC 334(a). Verify the current rules at IRC 334(b) and IRS.gov.
What happens to the subsidiary's NOL carryforwards and other tax attributes in an IRC 332 liquidation?
Under IRC 381, the parent acquires the subsidiary's tax attributes on a complete IRC 332 liquidation, including NOL carryforwards, capital loss carryforwards, E&P (or deficit), accounting methods, and other listed attributes. However, those inherited NOLs may be subject to an IRC 382 annual limitation if the subsidiary experienced a prior ownership change. Practitioners must model the IRC 382 limitation before projecting the value of any inherited NOLs. Verify the applicable rules at IRC 381, IRC 382, and IRS.gov.
When must Form 966 be filed and what are the consequences of missing the deadline?
Under IRC 6043(a), every corporation that adopts a plan of complete liquidation must file Form 966 within 30 days of adopting the plan. The 30-day clock runs from the date the board formally adopts the plan, not from the date of the first distribution. A certified copy of the plan of liquidation must be attached. Failure to file timely exposes the corporation to penalties under IRC 6043. Verify the current form requirements, attachments, and any late-filing relief at IRS.gov before the plan is adopted.
How does an IRC 338(h)(10) election interact with IRC 332 nonrecognition?
An IRC 338(h)(10) election or an IRC 336(e) election treats a qualified stock acquisition as a deemed asset acquisition for tax purposes. Where such an election is made, the subsidiary is treated as having sold its assets at FMV in a taxable transaction, and the IRC 332 nonrecognition rules are overridden. The practical effect is that the parent receives an FMV step-up in the subsidiary's assets rather than the carryover basis that IRC 332/334(b) would provide. This interaction is a key planning consideration in post-acquisition integration.
How does OBBBA's 100% bonus depreciation affect the choice between a taxable IRC 331 liquidation and a tax-free IRC 332 liquidation?
The OBBBA reinstated 100% bonus depreciation for qualified property under IRC 168(k). In a taxable IRC 331 liquidation, the parent receives assets at FMV (IRC 334(a) basis), and those assets may qualify for 100% first-year bonus depreciation, generating a substantial deduction from the built-in appreciation. In a tax-free IRC 332 liquidation, the parent takes carryover basis and forfeits the step-up, so there is no incremental bonus depreciation on the appreciated value. Practitioners must model the tax cost to the subsidiary (gain recognized under IRC 336) against the parent's bonus depreciation benefit, on a present-value basis, for each specific engagement. No universal rule applies: the analysis is fact-specific.