Corporate Reorganizations — Tax-Free Mergers, Acquisitions, and Spinoffs

When two corporations merge, when a parent spins off a subsidiary to its shareholders, or when someone contributes assets in exchange for newly-issued corporate stock, federal tax law can allow these transactions to happen without triggering immediate tax — provided the transaction meets specific technical requirements. These tax-free reorganization rules, codified at 26 U.S.C. §§ 351–368, are the backbone of corporate M&A tax planning. The key principle: if a transaction represents a genuine change in form rather than a cashing out of investment, and if shareholders maintain a continuing equity interest in the enterprise, Congress allows the transaction to occur at a rolled-over basis, with tax deferred until a future sale. Getting the details wrong — missing continuity of interest, boot triggers, or business purpose requirements — can convert a tax-free deal into a massive taxable event.

Current Law (2026)

Legal Authority

• 26 U.S.C. § 351 — Transfer to corporation controlled by transferor: if one or more persons transfer property to a corporation solely in exchange for stock, and immediately after the exchange those persons control at least 80% of the corporation's voting stock and 80% of all other classes, no gain or loss is recognized; the transferor's basis in the stock received equals the basis of property transferred; the corporation takes a carryover basis in received property
• 26 U.S.C. § 354 — Exchanges of stock and securities in reorganizations: shareholders and security holders who exchange their stock or securities pursuant to a plan of reorganization recognize no gain or loss if they receive solely qualifying stock or securities in the acquiring corporation; "boot" (cash or other property) triggers gain recognition
• 26 U.S.C. § 355 — Distribution of stock and securities of controlled corporation: a corporation may spin off a subsidiary to its shareholders tax-free if (1) it distributes 80% of the subsidiary's stock, (2) both the distributing and the subsidiary corporations have been active in a qualified trade or business for 5 years, (3) the transaction is not used principally as a device to distribute earnings and profits, and (4) there is a legitimate business purpose
• 26 U.S.C. § 356 — Receipt of additional consideration (boot): if a shareholder receives boot (cash or other property) in addition to qualifying stock in a reorganization, gain is recognized to the extent of the boot received; if the exchange has the effect of distributing a dividend (determined by applying § 302 principles), the gain may be treated as a dividend rather than capital gain
• 26 U.S.C. § 357 — Assumption of liabilities: if the acquiring corporation assumes the target's liabilities as part of a § 351 or reorganization, this generally doesn't create gain for the transferor — unless the liabilities exceed the basis of transferred property (which triggers gain) or the transfer lacks a business purpose
• 26 U.S.C. § 358 — Basis to distributees: in a tax-free reorganization, the shareholder's basis in received stock equals the basis of the surrendered stock, adjusted for boot received and gain/loss recognized
• 26 U.S.C. § 361 — Nonrecognition of gain or loss to corporations: a corporation that is a "party to a reorganization" doesn't recognize gain or loss when it transfers property to another party to the reorganization pursuant to the plan, subject to important exceptions for appreciated property
• 26 U.S.C. § 362 — Basis to corporations: the acquiring corporation takes a carryover basis in assets received in a tax-free reorganization — the built-in gain (if any) transfers with the asset
• 26 U.S.C. § 368 — Definitions: defines "reorganization" to include types A through G; also defines "party to a reorganization," "control" (80%), and "plan of reorganization"; provides the definitional backbone for all the foregoing provisions

The Seven Reorganization Types

Type A (statutory merger or consolidation): One corporation absorbs another under state merger law. The most flexible structure — no minimum amount of stock consideration is required by the statute (though continuity of interest doctrine requires enough stock to preserve tax-free treatment). In a "reverse triangular merger" (where a subsidiary merges into the target), the target survives as a subsidiary of the acquirer. In a "forward triangular merger," the target merges into the subsidiary.

Type B (stock-for-stock): The acquirer acquires control (80%) of the target using only voting stock. No cash at all — even $1 of cash consideration disqualifies a B reorganization. The target corporation survives as a subsidiary. Type B reorganizations are strict: "solely for voting stock" means exactly that.

Type C (stock-for-assets): The acquirer acquires "substantially all" of the target's assets using primarily its voting stock (up to 20% of consideration may be cash). The target distributes the acquirer's stock to its own shareholders and liquidates. "Substantially all" is not defined by statute; the IRS uses a 70% of net assets / 90% of net assets test in practice.

Type D: Used either for acquisitive transactions (where the acquired corporation ends up as a subsidiary) or divisive transactions (where a parent carves out a business and transfers it to a new subsidiary for distribution). Divisive D reorganizations always pair with a § 355 distribution.

Type E (recapitalization): A recapitalization of a single corporation — e.g., converting debt to equity, issuing new preferred stock for old common stock, or rearranging a corporation's capital structure. Must have a genuine business purpose.

Type F: A "mere change" — same business, same shareholders, just a change of state of incorporation or corporate name. The simplest and most technical reorganization type.

Type G: Reorganizations in bankruptcy proceedings under Chapter 11. Allows financially distressed corporations to transfer assets to new entities without triggering corporate-level tax, subject to creditor continuity rules.

Section 351: The Incorporation Nonrecognition Rule

Section 351 is the section most business owners encounter first: when you start a corporation and contribute cash, equipment, or other property in exchange for stock, no gain or loss is recognized — provided the person (or group of people) transferring property ends up with at least 80% control immediately after the exchange. The basis you had in the contributed property becomes your basis in the stock received (a carryover basis), and the corporation takes a carryover basis in the property.

The trap: contributing appreciated property to a corporation in which you won't have 80% control — say, you contribute a building worth $500,000 (basis $100,000) and receive 40% of the stock — is a taxable event. You've "sold" the building to the corporation at fair market value.

Services aren't property: Stock issued for services (not property) doesn't count toward the 80% control requirement and is ordinary income to the service recipient. In a typical startup, founders who contribute both cash and services need to ensure their total contribution qualifies, and service compensation is handled separately.

Section 355 Spinoffs: The Tax-Free Split

A corporate spinoff is one of the most powerful restructuring tools available. Under § 355, a parent corporation can distribute the stock of a wholly-owned subsidiary to the parent's shareholders completely tax-free, as long as:

1. The 80% distribution requirement: The parent distributes at least 80% of the subsidiary's voting stock and at least 80% of each other class of subsidiary stock
2. Active business requirement: Both the parent and the subsidiary must have been engaged in an "active trade or business" for the five years before the spinoff
3. Business purpose: A genuine corporate business purpose — separating businesses for operational, regulatory, or strategic reasons — not just distributing E&P to shareholders in a tax-favored form
4. Not a device: The spinoff cannot be used as a "device" to distribute earnings and profits; the IRS scrutinizes spinoffs where shareholders sell immediately after the distribution

A § 355 spinoff can be followed immediately by a sale of either the parent or the subsidiary to a third party — a technique sometimes called a "Morris Trust" or "Reverse Morris Trust" transaction — allowing tax-free distribution and a third-party sale, though with significant complexity.

Boot: The Taxable Trigger

"Boot" is any consideration received in a reorganization that doesn't qualify as stock of the acquiring corporation — cash, notes, assumption of liabilities in some circumstances, or other property. When a shareholder receives boot in a reorganization, they recognize gain to the extent of the boot (but never a loss). The characterization of that gain — capital gain or dividend — depends on whether the exchange "has the effect of a dividend distribution." Courts apply § 302 redemption principles to answer this question.

How It Affects You

If you're a business owner contributing appreciated property to a corporation (§ 351): The key requirement is that you (and all other contributors in the same transaction) own 80% or more of the corporation's combined voting stock immediately after the exchange. If you and a partner are both contributing, aggregate your ownership — but all contributions must be part of the "same transaction," which can be a challenge with staggered founder contributions. Also beware: if you receive any "boot" (cash or other property) in addition to stock, you recognize gain to the extent of boot received. And if you contribute property with built-in loss to avoid recognizing that loss personally, the corporation's basis in that property may be limited to its FMV at contribution — Congress closed the loss-importation loophole.

If you're a shareholder in a stock-for-stock merger: If the merger qualifies as a Type A (statutory merger), B (stock-for-stock exchange), or C (stock-for-assets) reorganization, your gain is deferred — you take the acquirer's stock with carryover basis and holding period. If you receive a mix of stock and cash ("mixed consideration" deal), you recognize gain to the extent of cash received, but only if you have gain overall (you can't recognize a loss in a reorganization). The character of gain in a boot-for-stock exchange — capital gain vs. ordinary dividend — depends on § 356 analysis: if the exchange "has the effect of distributing a dividend," the boot is treated as a dividend rather than capital gain. This matters for corporate shareholders with access to the dividends-received deduction, but also for high-bracket individuals comparing preferential capital gain rates to ordinary dividend rates.

If your company is planning a spinoff (§ 355): Request an IRS private letter ruling before you execute — the ruling takes 6-18 months and costs $50,000+ in professional fees, but for a transaction that could have hundreds of millions of tax exposure if it fails, it's worth it. The most litigated § 355 requirements: (1) business purpose — the spinoff must have a real non-tax business reason (separating business lines with different strategic futures, removing a regulated subsidiary, enabling independent M&A); (2) device prohibition — the spinoff can't be used as a tax-free way to distribute earnings and profits; and (3) active business requirement — both the distributing and controlled corporations must have conducted an active business for 5 years before the spinoff, with acquired businesses analyzed separately from historic businesses.

If you're selling a company in a stock deal and the buyer requests a § 338(h)(10) election: This election treats the stock sale as an asset sale for tax purposes — the buyer gets a stepped-up basis in all of the target's assets (enabling additional depreciation and amortization deductions), but the target pays corporate-level tax on the deemed asset sale gain. The economics must be negotiated: the buyer typically pays a gross-up premium to compensate you for the additional corporate tax; both parties then share the net tax benefit (the buyer's PV of future depreciation deductions minus the seller's additional tax). § 338(h)(10) is most valuable when the target has high-basis assets (limiting corporate gain) or when the buyer expects to hold assets for long periods (maximizing the PV of stepped-up depreciation). If you're an S corporation seller, § 338(h)(10) is common — the pass-through of the deemed asset sale gain flows to shareholders, who get capital gain treatment (avoiding C corporation-level tax entirely).

State Variations

Most states follow the federal tax-free reorganization rules under their own tax codes, but important variations include:

• State E&P and boot: Several states don't conform fully to federal reorganization rules; some states tax boot differently or have different carryover basis rules
• Transfer taxes: Several states impose real estate transfer taxes or deed recording taxes even on tax-free reorganizations involving real property — these state-level taxes apply regardless of the federal income tax treatment
• California: Generally conforms to federal reorganization rules but has aggressive combined reporting requirements that can affect the post-reorganization state tax position of the combined entity

Pending Legislation

No major changes to the tax-free reorganization rules are pending as of 2026. Proposals in recent years focused on spinoff anti-abuse rules (limiting § 355 treatment where the distributed subsidiary is immediately sold to a third party or SPAC) but were not enacted. Congressional scrutiny of large corporate tax-free transactions — particularly tech company spinoffs — continues through oversight hearings and Treasury regulatory activity rather than statutory change.

Recent Developments

The IRS has significantly curtailed the use of "cash-rich" spinoffs — transactions where the spun-off subsidiary holds primarily investment assets rather than active business assets. Final regulations under § 355 tightened the "active trade or business" requirement and created per se device rules for certain spinoffs with high investment asset ratios. Treasury also finalized regulations addressing the interaction of § 355 with the corporate earnings stripping rules and with consolidated return regulations, reducing the planning flexibility around post-spinoff structure.