An IRC Section 368 tax-free reorganization is a corporate merger, acquisition, division, recapitalization, or restructuring that fits one of seven statutory categories and therefore closes without immediate federal income tax on the corporations or their shareholders.1eCFR. 26 CFR 1.368-2 – Definition of Terms The tax is deferred, not forgiven. Basis rules follow the assets into the acquirer’s hands and follow the new shares into the shareholders’ hands, so the government keeps its claim on the built-in gain until someone eventually sells. Fitting the deal into a category is only the start. Judicial doctrines layered on top of the statute can disqualify a transaction that reads correctly on paper, and a disqualified reorganization becomes fully taxable at both the corporate and shareholder levels.
The Seven Reorganization Structures
Section 368(a)(1) sets out seven labeled categories, each built around a different deal mechanic.2Office of the Law Revision Counsel. 26 USC 368 – Definitions Relating to Corporate Reorganizations The rules differ sharply from one to the next, especially on what kind of consideration the acquirer can pay.
Type A: Statutory Merger or Consolidation
A Type A is a merger or consolidation carried out under federal or state corporate law. It is the most flexible category because the statute puts no restriction on the consideration. Voting stock, nonvoting stock, cash, debt, or a mix all work, so long as the deal still meets the continuity of interest doctrine. That flexibility makes Type A the usual structure for negotiated mergers between willing parties.
Type B: Stock-for-Stock
In a Type B, the acquirer uses solely its own voting stock, or voting stock of its parent, to pick up at least 80% of the target’s voting power and 80% of every other class of the target’s stock. “Solely for voting stock” is the strictest consideration rule in Section 368. Even a small amount of cash to target shareholders blows up the entire transaction. The target survives as a subsidiary, which helps when it holds non-assignable contracts or licenses.
Type C: Assets for Voting Stock
A Type C is an acquisition of substantially all of the target’s assets in exchange for voting stock. The default rule is solely voting stock, but the statute allows a narrow exception: if at least 80% of the fair market value of the target’s property is acquired for voting stock, up to 20% can be other consideration. Any liabilities the acquirer assumes count as money paid for purposes of that 80% test, which sharply narrows the room for cash. After the acquisition, the target must distribute what it received, along with any remaining assets, and liquidate.
Type D: Divisive Reorganizations
Type D covers transfers of assets from one corporation to another when the transferor, its shareholders, or both control the recipient right after the transfer, followed by a distribution of the recipient’s stock or securities in a qualifying corporate division or exchange. In practice, this is the spin-off, split-off, or split-up structure: a parent separates a business line into an independent entity and distributes shares to its investors. The rules of Section 355 also have to be met for the distribution to stay tax-free.
Types E, F, and G
A Type E is a recapitalization inside a single corporation, such as exchanging bonds for stock or swapping preferred shares for common. A Type F is a mere change in identity, form, or place of organization of one corporation, like reincorporating in another state. A Type G applies to transfers of assets under a court-approved plan in a federal bankruptcy proceeding, giving a distressed company a path to restructure without stacking a tax bill on top of its other problems.
Triangular Mergers
Many deals use a subsidiary rather than the parent as the merger vehicle. In a forward triangular merger, the target merges into a subsidiary of the acquiring parent and the subsidiary issues the parent’s stock. The subsidiary must acquire substantially all of the target’s properties, and the deal has to be one that would have qualified as a Type A if the target had merged directly into the parent. In a reverse triangular merger, the subsidiary merges into the target, which then survives as a subsidiary of the parent. The target must retain substantially all of its own properties plus those of the merged subsidiary, and former target shareholders must exchange a controlling amount of target stock for voting stock of the parent. For IRS ruling purposes, “substantially all” generally means at least 70% of gross assets and 90% of net assets. The triangular structures insulate the parent from the target’s liabilities while keeping the target’s contracts and legal identity in place.
The Doctrines That Sit on Top of the Statute
Meeting the mechanical requirements of a category is necessary but not enough. Four judicial and regulatory doctrines apply to every reorganization, and any one of them can disqualify a deal that otherwise checks the statutory boxes.
Continuity of Interest
Target shareholders have to end up with a meaningful equity stake in the acquirer. Treasury regulations treat this as satisfied when the acquirer’s stock received by target shareholders is worth at least 40% of the value of their old target stock.3eCFR. 26 CFR 1.368-1 – Purpose and Scope of Exception of Reorganization Exchanges For an advance private letter ruling from the IRS, the bar is higher: at least 50% of the consideration must be stock. The rest can be cash, debt, or other property, but the more non-stock consideration flows to target shareholders, the greater the risk of an IRS challenge.
Continuity of Business Enterprise
After closing, the acquirer must either continue the target’s historic business or use a significant portion of the target’s business assets in some active business. If the target ran multiple lines of business, continuing one significant line is enough. The regulation looks at the relative importance of the assets, not just their dollar value. An acquirer that shuts everything down and sells the target’s assets shortly after closing will almost certainly fail this test.
Business Purpose
Every reorganization needs a legitimate commercial reason beyond reducing taxes. The Supreme Court set this out in Gregory v. Helvering, where a corporate spin-off designed purely to convert earnings into capital gain was recharacterized as a taxable dividend.4Justia. Gregory v. Helvering, 293 US 465 Expanding into new markets, achieving operational efficiencies, and shedding underperforming divisions are the kinds of purposes that hold up. A transaction that passes every mechanical test can still be disqualified if the IRS concludes it had no economic substance beyond tax avoidance.
Step Transaction
The IRS can collapse a series of formally separate steps into one transaction if the steps were really parts of a single plan. Courts use three alternative tests. The end-result test asks whether the steps were prearranged parts of one transaction aimed at a specific outcome. The mutual interdependence test asks whether any single step would have been pointless without the others. The binding commitment test, the narrowest, applies only when there was a legally binding obligation to complete later steps at the time the first step occurred.5Internal Revenue Service. The Step Transaction Doctrine – Memorandum 200826004 Satisfying any one of the three lets the IRS treat the whole series as a single taxable transaction.
What Tax-Free Actually Means
At the Corporate Level
The target recognizes no gain or loss when it transfers property solely for stock or securities of the acquirer as part of the plan of reorganization.6Office of the Law Revision Counsel. 26 USC 361 – Nonrecognition of Gain or Loss to Corporations The acquirer pays no tax when it issues its own stock as consideration, whatever that stock is worth.7Office of the Law Revision Counsel. 26 USC 1032 – Exchange of Stock for Property
At the Shareholder Level
Shareholders who exchange target stock solely for stock in the acquirer recognize no gain or loss.8Office of the Law Revision Counsel. 26 USC 354 – Exchanges of Stock and Securities in Certain Reorganizations If they also receive “boot,” meaning cash or non-stock property, they recognize gain up to the fair market value of the boot but cannot recognize a loss regardless of the circumstances.9Office of the Law Revision Counsel. 26 USC 356 – Receipt of Additional Consideration The character of that gain depends on whether the distribution has the effect of a dividend. If it does, it is taxed as ordinary dividend income rather than at capital gains rates.
How the Deferral Is Preserved
The mechanism is basis. The acquirer takes a carryover basis in the assets it receives, equal to the target’s old basis plus any gain the target recognized on the transfer.10Office of the Law Revision Counsel. 26 USC 362 – Basis to Corporations Shareholders take a substituted basis in their new stock: the basis of the shares they surrendered, decreased by any cash or boot received, and increased by any gain they recognized.11Office of the Law Revision Counsel. 26 USC 358 – Basis to Distributees The deferred gain stays embedded in the property. When the acquirer eventually sells the assets, or when shareholders sell their new stock, that gain finally becomes taxable.
Assumed Liabilities and Loss Carryovers
In most reorganizations the acquirer takes on some or all of the target’s debts. The general rule is favorable: liability assumptions are not treated as boot and do not disqualify the exchange.12Office of the Law Revision Counsel. 26 USC 357 – Assumption of Liability Two exceptions can change that. If the principal purpose of a liability assumption is tax avoidance, or the assumption lacks a bona fide business purpose, every liability assumed in the exchange is recharacterized as cash received by the transferor. The taxpayer bears the burden of proving no avoidance purpose existed, and the absence of that motive must be “unmistakable.” Separately, in certain Type D divisive reorganizations combined with Section 355 distributions, and in Section 351 transfers, the transferor recognizes gain to the extent assumed liabilities exceed the total adjusted basis of the transferred assets, treated as gain from a sale. Liabilities whose payment would give rise to a deduction, such as accrued trade payables, are excluded from that calculation. An overleveraged target can create unexpected taxable gain even in a clean deal structure.
On the other side, the target’s tax attributes carry over to the acquirer. Section 381 lists what survives, including net operating loss carryovers, capital loss carryovers, earnings and profits, accounting methods, depreciation schedules, and charitable contribution carryforwards.13Office of the Law Revision Counsel. 26 USC 381 – Carryovers in Certain Corporate Acquisitions Section 382 then caps how much of the target’s pre-change losses the acquirer can use each year. The annual limitation equals the value of the target’s stock immediately before the ownership change, multiplied by the long-term tax-exempt rate.14Office of the Law Revision Counsel. 26 USC 382 – Limitation on Net Operating Loss Carryforwards and Certain Built-In Losses Following Ownership Change As of early 2026, that rate is 3.58%.15Internal Revenue Service. Revenue Ruling 2026-7 A target valued at $50 million would produce an annual loss limitation of roughly $1.79 million, no matter how large the actual accumulated losses. Unused amounts carry forward, but big loss balances end up stretched out over many years rather than absorbed immediately.
What Happens If the Deal Fails to Qualify
A transaction structured as tax-free that fails any qualifying requirement becomes a fully taxable event for everyone, and the recharacterization runs back to the closing date. At the corporate level, the target is treated as having sold its assets for cash, recognizing gain on every asset whose fair market value exceeds its adjusted basis. At the shareholder level, the transaction is treated as a complete liquidation, with amounts received treated as full payment in exchange for the stock.16Office of the Law Revision Counsel. 26 USC 331 – Gain or Loss to Shareholders in Corporate Liquidations Shareholders recognize capital gain or loss on the difference between what they received and their stock basis. The basis rules that would have preserved deferred gain never kick in, so the acquirer gets a fair-market-value basis in the assets instead of a carryover basis. The combined tax hit at both levels typically dwarfs any benefit from that step-up.
The common failure points are predictable: too much cash to satisfy continuity of interest, any non-voting consideration in a Type B, selling off the target’s business assets shortly after closing, or an absence of legitimate business purpose. There is no cure after the fact, which is why the planning happens up front.
Filings the Parties Must Complete
Every corporation involved must adopt a formal plan of reorganization identifying the parties, describing the structure, and stating the fair market value and adjusted basis of all stock or assets transferred. Each party attaches an information statement to its timely filed federal income tax return for the year the deal closes, confirming that the transaction qualifies for nonrecognition and providing the details the regulations require.17eCFR. 26 CFR 1.368-3 – Records to Be Kept and Information to Be Filed With Returns
When the transaction involves an acquisition of control or a substantial change in capital structure valued at $100 million or more, the corporation must also file Form 8806 within 45 days of the transaction, or by January 5 of the following year, whichever comes first.18Internal Revenue Service. Form 8806 – Information Return for Acquisition of Control or Substantial Change in Capital Structure The $100 million threshold applies to the fair market value of the stock acquired or of the cash and property distributed to shareholders, depending on the transaction type.
Issuers of securities affected by the reorganization must file Form 8937 to report how the transaction changes basis. It is due on or before the 45th day after the organizational action, or by January 15 of the following year, whichever is earlier.19Internal Revenue Service. Instructions for Form 8937 Copies must go to every security holder of record as of the date of the action and to subsequent holders through the date the statement is furnished. Companies with publicly traded stock can meet the shareholder delivery requirement by posting a completed, signed Form 8937 on their primary public website and keeping it accessible for ten years.