Section 368 tax-free reorganizations are corporate restructurings — mergers, acquisitions, spin-offs, recapitalizations, and similar deals — that qualify under Internal Revenue Code Section 368(a)(1) to defer tax on the gain that would normally result from exchanging stock or assets. If the transaction fits one of seven defined categories and clears a handful of judicial doctrines, neither the corporations nor their shareholders pay tax at closing. Get the structure wrong and the same deal becomes a fully taxable sale.
Why the Deferral Exists
The general rule in tax law is that exchanging property for something materially different triggers gain or loss. Section 368 carves out an exception for corporate restructurings where the same economic interests continue in a new form.1eCFR. 26 CFR 1.368-1 – Purpose and Scope of Exception of Reorganization Exchanges The theory is that a business merely changing its corporate form, or combining with another company while shareholders retain a proprietary stake, hasn’t reached the right moment to tax the gain.
Deferral is not automatic. The deal has to fall inside one of the seven statutory types, and it has to serve a real business purpose beyond tax reduction. The Supreme Court set that principle in Gregory v. Helvering, denying tax-free treatment to a transaction that met the statute’s letter but existed only to let a shareholder pull assets out at a lower rate.2Legal Information Institute. Gregory v. Helvering Form alone is not enough.
The Seven Reorganization Types
Section 368(a)(1) labels the qualifying transaction categories A through G. Each has its own rules about what consideration can be used, how assets or stock move, and what structure remains afterward.
Type A: Statutory Mergers and Consolidations
A Type A is a merger or consolidation carried out under state or federal corporate law.3Office of the Law Revision Counsel. 26 USC 368 – Definitions Relating to Corporate Reorganizations One corporation absorbs another and the target ceases to exist, or both dissolve into a newly formed entity.
Type A is the most flexible on consideration. There is no statutory requirement that the acquirer use voting stock or even common stock. Any class of stock works, and cash or other property (called “boot”) can round out the mix, as long as enough of the total consideration is equity to satisfy continuity of interest. That flexibility makes Type A the most common structure for large acquisitions. The trade-off: boot received by a target shareholder can trigger taxable gain for that shareholder even though the reorganization is tax-free at the corporate level.
Triangular Mergers
Two variations let the acquirer use a subsidiary as the merger vehicle instead of merging directly. Both insulate the parent from the target’s liabilities.
In a forward triangular merger under Section 368(a)(2)(D), the target merges into the acquiring corporation’s subsidiary and the target’s shareholders receive the parent’s stock. The subsidiary must acquire substantially all of the target’s properties, and no stock of the subsidiary itself can be used as consideration.3Office of the Law Revision Counsel. 26 USC 368 – Definitions Relating to Corporate Reorganizations
In a reverse triangular merger under Section 368(a)(2)(E), the subsidiary merges into the target, and the target survives as a subsidiary of the parent. To qualify, the surviving corporation must hold substantially all of its own and the merged subsidiary’s properties, and the former target shareholders must exchange enough stock that the parent ends up with a controlling interest.3Office of the Law Revision Counsel. 26 USC 368 – Definitions Relating to Corporate Reorganizations The reverse structure is useful when the target holds contracts, licenses, or permits that cannot easily be transferred.
Type B: Stock-for-Stock Acquisitions
Type B is the most restrictive. The acquirer exchanges solely its voting stock (or the voting stock of its parent) for stock of the target, and must have “control” of the target immediately after. Section 368(c) defines control as at least 80% of the total combined voting power plus 80% of each class of nonvoting stock.3Office of the Law Revision Counsel. 26 USC 368 – Definitions Relating to Corporate Reorganizations
The word “solely” makes this type unforgiving. Any cash, debt assumption, or non-stock item contaminates the whole deal. The Supreme Court drew that line firmly in Helvering v. Southwest Consolidated Corp., holding that “voting stock plus some other consideration does not meet the statutory requirement.”4Justia U.S. Supreme Court Center. Helvering v. Southwest Consolidated Corp., 315 U.S. 194 (1942) The payoff is that the target survives as a separate subsidiary, keeping its contracts, legal identity, and entity-level tax attributes intact.
Type C: Asset Acquisitions
A Type C involves one corporation acquiring substantially all of another corporation’s assets in exchange for voting stock, with the target typically liquidating afterward.3Office of the Law Revision Counsel. 26 USC 368 – Definitions Relating to Corporate Reorganizations The IRS’s ruling position, drawn from Revenue Procedure 77-37, treats “substantially all” as at least 70% of gross assets and 90% of net assets.
Limited boot is allowed. The acquirer can use up to 20% of the total value in cash or other property, but only if at least 80% of the target’s property is acquired solely for voting stock. Any liabilities the acquirer assumes count as cash for that 80% test, which can eat into the allowance quickly.
Types D Through G
- Type D (corporate divisions): A corporation transfers assets to a new or existing entity and distributes stock of that entity to its shareholders. Spin-offs, split-offs, and split-ups are Type D. For divisive Type Ds, the transferor or its shareholders must have 80% control of the new entity under Section 368(c); for nondivisive Type Ds (often overlaps with Type A or C), the threshold drops to 50% of voting power or total value under Section 304(c).5Internal Revenue Service. Revenue Ruling 2015-10
- Type E (recapitalizations): A corporation reshuffles its capital structure. Swapping debt for equity, exchanging preferred for common, or modifying share-class rights all qualify.
- Type F (change in form): A mere change in identity, form, or state of incorporation, such as reincorporating from Delaware to Nevada.
- Type G (bankruptcy reorganizations): A corporation in a Title 11 case transfers assets under a court-approved plan. Special rules relax some of the usual requirements.
Continuity of Interest and Continuity of Business Enterprise
Two judge-made doctrines, now codified in Treasury Regulations, gate every reorganization type. Fail either one and the transaction is disqualified even if it perfectly matches a statutory definition.
Continuity of interest requires that target shareholders receive a meaningful equity stake in the acquiring or resulting corporation. In Helvering v. Minnesota Tea Co., the Supreme Court held that the interest received “must represent a substantial part of the value of the thing transferred.”6Justia U.S. Supreme Court Center. Helvering v. Minnesota Tea Co., 296 U.S. 378 (1935) Treasury Regulations use examples showing that a transaction preserves a substantial proprietary interest when at least 40% of the consideration is acquirer stock.1eCFR. 26 CFR 1.368-1 – Purpose and Scope of Exception of Reorganization Exchanges The IRS itself won’t issue a favorable private letter ruling below 50%. In Minnesota Tea, the Court upheld a deal with about 38.5% stock, so the absolute floor is not fixed. For deal planning, 50% equity is the safe target.
Continuity of business enterprise requires the acquirer to either continue a significant portion of the target’s historic business or use a significant portion of the target’s historic business assets in a business. The doctrine prevents an acquirer from buying and immediately liquidating a target. Section 382 imposes a separate, stricter penalty: if the new loss corporation fails to continue the old loss corporation’s business enterprise for two full years after an ownership change, the annual limitation on pre-change losses drops to zero.7Office of the Law Revision Counsel. 26 USC 382 – Limitation on Net Operating Loss Carryforwards and Certain Built-In Losses Following Ownership Change
Business Purpose and the Step Transaction Doctrine
Even a deal that satisfies the statutory type and both continuity doctrines can fail if it lacks a genuine business purpose beyond tax avoidance. That is the lesson of Gregory v. Helvering, and it remains the background test for every reorganization.
Related to it is the step transaction doctrine. When a reorganization unfolds as a series of transactions rather than a single event, the IRS or a court may collapse the steps into one and evaluate the end result. The doctrine cuts both ways: it can save a deal that looks like it fails at an intermediate step, or it can defeat one where the final combination doesn’t match any qualifying type. Courts use three tests: the end-result test (whether the steps were always meant to produce the ultimate outcome), the interdependence test (whether each step would be pointless without the others), and the binding-commitment test (whether the parties were obligated at the outset to complete every step). Revenue Ruling 2001-46 applies this idea by treating a newly formed subsidiary’s merger into a target followed by the target’s merger into the parent as a single statutory merger of the target into the parent.8Internal Revenue Service. Revenue Ruling 2001-46
What Shareholders Pay (or Don’t)
If you exchange target stock solely for acquirer stock in a qualifying reorganization, you recognize no gain or loss.9Office of the Law Revision Counsel. 26 USC 354 – Exchanges of Stock and Securities in Certain Reorganizations Your basis in the new shares equals your basis in the old, adjusted for any gain recognized and any boot received.10Office of the Law Revision Counsel. 26 USC 358 – Basis to Distributees The holding period carries over, so a later sale can still qualify for long-term capital gains treatment based on when you bought the original shares.
Boot changes the picture. If you receive cash or other non-stock property alongside the acquirer’s stock, you recognize gain up to the fair market value of the boot. You never recognize loss in a reorganization exchange.11Office of the Law Revision Counsel. 26 USC 356 – Receipt of Additional Consideration Recognized gain is sometimes treated as a dividend rather than a capital gain, depending on whether the exchange has the effect of a distribution of earnings and profits.
What Happens to the Target’s Tax Attributes
A qualifying acquisitive reorganization carries the target’s tax attributes over to the acquirer under Section 381: net operating loss carryovers, capital loss carryovers, tax credit carryovers, accounting methods, and earnings and profits history all move with the assets.12Office of the Law Revision Counsel. 26 USC 381 – Carryovers in Certain Corporate Acquisitions
Section 382 then sharply limits how fast the acquirer can actually use those pre-change net operating losses. An ownership change occurs when one or more 5-percent shareholders increase their aggregate ownership by more than 50 percentage points over the testing period, and most acquisitive reorganizations trigger it.7Office of the Law Revision Counsel. 26 USC 382 – Limitation on Net Operating Loss Carryforwards and Certain Built-In Losses Following Ownership Change
Once triggered, the annual usable amount is capped at the value of the old loss corporation multiplied by the long-term tax-exempt rate. As of early 2026, that rate is 3.51%. A target worth $10 million at the change date produces an annual cap of roughly $351,000. Unused limitation carries to the next year, but a company holding $50 million in losses may still take decades to absorb them. And if the acquirer fails to continue the target’s business for two years after the change date, the annual limitation drops to zero and the pre-change losses become permanently worthless.
Divisive Type D reorganizations and certain Type G transactions sit outside the Section 381 carryover rules altogether, so attributes don’t automatically follow the assets.
Reporting the Transaction
Every corporation that is a party to a reorganization must attach a formal statement to its tax return for the year of the deal. Treasury Regulation 1.368-3 requires the names and EINs of all parties, the date of the reorganization, and the value and basis of all assets, stock, or securities transferred.13eCFR. 26 CFR 1.368-3 – Records to Be Kept and Information to Be Filed With Returns Any significant holder files a separate statement showing the value and basis of the stock they exchanged. For publicly traded corporations, a significant holder is anyone owning at least 5% by vote or value; for private companies, the threshold is 1%.14Internal Revenue Service. Notice 2009-4 – Determination of Basis in Property Acquired in Transferred Basis Transaction
The issuer has a separate obligation under Section 6045B to report any organizational action affecting the basis of its securities. This goes on Form 8937, which must be filed with the IRS within 45 days of the reorganization or by January 15 of the following year, whichever comes first. Affected shareholders must receive the form by January 15 of the following year.15Internal Revenue Service. Instructions for Form 8937 Instead of filing directly, the issuer can post the completed form on its public website by the same deadline and keep it available for ten years. If the original issuer misses the deadline, any acquiring or successor entity becomes jointly liable.
What Can Void the Treatment After Closing
Qualifying at closing is only half the exposure. The IRS can retroactively recharacterize a reorganization as a taxable sale if later conduct shows the deal was never what it appeared to be.
The most common problem is a prearranged disposition. If target shareholders had an implicit or explicit agreement to sell the stock they received shortly after closing, continuity of interest fails and the substance looks like a cash sale. If the acquirer sells the target’s assets or shuts down its business soon after the deal, continuity of business enterprise fails.
Redemptions can produce the same result. When the acquirer redeems a large block of the stock it just issued to target shareholders, the transaction begins to resemble a leveraged buyout rather than a reorganization. Courts look at whether the redemption was part of the plan or an independent later decision.
Documentation is the backbone. Each participating board must adopt a formal plan of reorganization stating the terms, structure, and parties. Without a clear contemporaneous plan, the IRS has an easy argument that the transaction was reassembled after the fact to fit a tax-free mold. Shareholder approvals, regulatory filings, and corporate resolutions should track the plan’s timeline and terms.