IRC 368 Tax-Free Reorganization Requirements: Types A, B, C, D, and G

What IRC 368 Does and Why It Exists

When one corporation acquires another, the transaction is, at its core, a disposition of property. Absent a specific statutory carve-out, every shareholder and every entity involved would recognize gain or loss on that disposition. IRC 368 is Congress's answer to the question of when a corporate restructuring is sufficiently continuous in form and ownership to justify deferring that recognition. The statute identifies categories of transactions, called "reorganizations," in which neither the corporation nor its shareholders recognize gain or loss on the exchange, subject to precise conditions.

The economic rationale is straightforward: if a transaction is merely a change in the legal vehicle holding the same business, and if the owners maintain a meaningful continuing stake in that business, taxing the exchange as if assets had been sold would generate a liability that bears no relationship to any realized economic change. Congress designed the nonrecognition regime to remove that friction from transactions where business continuity and ownership continuity are real, not merely nominal.

This guide covers the five reorganization types most commonly encountered in M&A and restructuring practice: Type A (statutory merger or consolidation), Type B (stock-for-stock exchange), Type C (assets-for-stock exchange), Type D (both its acquisitive and divisive variants), and Type G (insolvency reorganization). Each type carries its own consideration requirements, structural mechanics, and planning traps.

Scope note: The Type F reorganization, which covers identity, form, and place-of-organization changes, is addressed in a separate practitioner guide on this site. Type F is not covered here. Types E (recapitalization) and G (treated in this guide) round out the full IRC 368(a)(1) list, though Type E is outside the M&A acquisition context and is not covered in this guide.

General Requirements Applicable to All Reorganizations

Three judge-made and regulatory requirements cut across every reorganization type. A transaction that satisfies the literal statutory description of a Type A, B, C, D, or G reorganization still fails if any of these cross-cutting conditions is not met.

Continuity of Interest (COI)

The continuity of interest doctrine requires that a substantial portion of the consideration received by target shareholders consists of a proprietary interest in the acquiring corporation, meaning stock. Treasury Regulation section 1.368-1(e) codifies this requirement and provides a safe harbor: if at least 40% of the total consideration paid to target shareholders is acquiring-corporation stock (by value), COI is satisfied. Transactions using less than 40% stock are not automatically disqualified but face a facts-and-circumstances inquiry. Verify the current safe harbor percentage at IRS.gov and confirm applicable guidance before relying on this threshold in a specific deal.

The regulation also establishes the signing-date rule: COI is measured as of the date the binding contract to reorganize is signed, not as of the closing date. Post-signing dispositions of acquiring-corporation stock by unrelated target shareholders, and post-signing declines in the acquirer's stock price that reduce the overall consideration mix, do not retroactively destroy COI that was satisfied at signing. This rule gives substantial planning certainty in deals with extended closing timelines.

Continuity of Business Enterprise (COBE)

Under Treasury Regulation section 1.368-1(d), the acquiring corporation must, after the reorganization, either (a) continue the target's historic business or (b) use a significant portion of the target's historic business assets in a business. "Historic business" means the business the target was engaged in most recently before the reorganization. COBE is tested immediately after the reorganization closes. A post-closing liquidation of the target's product line or immediate sale of its key operating assets will defeat COBE and destroy the reorganization's tax-free character.

Importantly, COBE is tested at the level of the acquiring corporation's "qualified group," meaning a group of corporations connected by 80% ownership. An acquiring parent that drops target assets into a controlled subsidiary can still satisfy COBE if the subsidiary uses those assets in a business. This flexibility is significant in multi-tier holding structures.

Business Purpose

The business purpose requirement, derived from Gregory v. Helvering and codified in Treasury Regulation section 1.368-1(b), demands that the reorganization serve a genuine business purpose independent of tax benefit. The purpose need not be the primary motivation, but it must be real. Examples of recognized business purposes include consolidating legal entities to reduce administrative costs, restructuring debt to avoid insolvency, creating a holding company structure for a public offering, and facilitating a spin-off to allow two business lines to operate independently. A transaction whose sole or dominant purpose is generating a tax benefit without any corresponding business rationale will be recharacterized.

Type A: Statutory Merger or Consolidation (IRC 368(a)(1)(A))

A Type A reorganization is a merger or consolidation effected under the corporation laws of the United States, a state, the District of Columbia, or a foreign jurisdiction (for cross-border transactions subject to additional requirements under IRC 367). In a straightforward domestic Type A merger, the target corporation merges into the acquiring corporation under state law: the target ceases to exist as a separate legal entity, and all of its assets and liabilities pass to the surviving corporation by operation of law.

The single most important advantage of the Type A over all other reorganization types is its flexibility as to consideration. There is no statutory requirement that consideration consist solely of stock. The acquiring corporation can pay a mix of its own voting stock, non-voting stock, cash, debt instruments, or other property. The constraints are those imposed by the three general requirements, principally COI: the deal must include enough stock consideration to satisfy the continuity threshold, but beyond that the parties can allocate consideration as deal economics dictate.

Liabilities of the target assumed by operation of law in a Type A merger do not give rise to gain recognition at the corporate level. This is a critical distinction from the Type C, where liabilities assumed by the acquirer count against the 20% boot cap. In a highly leveraged target, a Type A avoids a structural impediment that could blow up a Type C.

Forward Triangular Merger (IRC 368(a)(2)(D))

In a forward triangular merger, a wholly owned subsidiary of the acquiring parent (the merger sub) merges with the target, and the target merges out of existence into the merger sub, which survives as a subsidiary of the parent. The target shareholders receive stock of the parent, not stock of the merger sub. For this structure to qualify under IRC 368(a)(2)(D), the merger sub must acquire substantially all of the target's assets, and the transaction must be one that would have qualified as a Type A if the parent had merged with the target directly. Triangular mergers are the dominant structure in public company M&A because they insulate the parent's assets from the target's liabilities and avoid triggering consent requirements in the target's contracts.

Reverse Triangular Merger (IRC 368(a)(2)(E))

In a reverse triangular merger, the merger sub merges into the target, and the target survives as a wholly owned subsidiary of the parent. Target shareholders exchange their stock for parent voting stock. The reverse triangular merger qualifies as a Type A under IRC 368(a)(2)(E) if: (1) the target holds substantially all of its own assets and substantially all of the merger sub's assets after the transaction, and (2) former target shareholders exchange, in the aggregate, target stock constituting control (80% voting and 80% total shares of each class) for parent voting stock. Unlike a Type B, a reverse triangular merger can include some boot, subject to COI. The reverse triangular is preferred when the target has valuable contracts or licenses that do not survive a forward merger under their own terms.

Type B: Stock-for-Stock Exchange (IRC 368(a)(1)(B))

A Type B reorganization is an acquisition by the acquiring corporation of stock of the target corporation, using solely voting stock of the acquiring corporation (or solely voting stock of a corporation that controls the acquiring corporation, the "parenthetical B"), in exchange for at least 80% of the total combined voting power of all classes of target stock entitled to vote and at least 80% of the total number of shares of all other classes of target stock.

The defining feature of the Type B is the "solely for voting stock" requirement. The word "solely" is interpreted with no flexibility: the acquiring corporation and its affiliates may not pay any consideration other than qualifying voting stock. This rule has produced some of the most litigated outcomes in reorganization tax law. The Seagram line of cases established that even a small cash payment, made in connection with the broader stock exchange, will taint the entire transaction and convert it into a taxable purchase. There is no de minimis exception.

Because the target's shareholders receive only stock, there is no boot to tax at the shareholder level. Target shareholders take an exchanged basis in the acquiring-corporation stock equal to their basis in the target stock surrendered. The target survives as a wholly owned (or at least 80%-owned) subsidiary of the acquiring corporation. This structure preserves the target as a legal entity, which is useful when the target has valuable contracts, permits, or licenses that would not survive a statutory merger.

The Creeping Acquisition Problem

The acquiring corporation may have purchased some target stock for cash in prior, unrelated transactions before proposing the Type B reorganization. Treasury regulations take a pragmatic approach: prior acquisitions for cash that were completed as independent transactions well before the reorganization plan was adopted are generally not integrated with the reorganization. However, cash purchases that are part of the same plan or that occur within a relatively short period before the stock exchange create a serious taint risk. Practitioners should carefully document the independence of any prior cash acquisitions and obtain a tax opinion on integration risk before proceeding.

Parenthetical B Structures

In a parenthetical B, the acquiring corporation exchanges stock of its parent for target stock. The mechanics are the same as a standard Type B, but the stock consideration must be voting stock of the controlling parent, not the acquiring corporation itself. This structure allows a subsidiary to serve as the acquirer (for liability insulation or regulatory reasons) while the target shareholders receive parent-company stock with greater market liquidity.

Type C: Assets-for-Stock Exchange (IRC 368(a)(1)(C))

A Type C reorganization is an acquisition by the acquiring corporation of substantially all of the properties of the target corporation, using solely its own voting stock (or voting stock of a controlling parent corporation) as consideration, followed by the liquidation of the target corporation. The Type C accomplishes at the asset level what the Type B accomplishes at the stock level: the acquirer takes ownership of the target's business, but through an asset transfer rather than a stock exchange.

The "Substantially All" Standard

The IRC does not define "substantially all." Rev. Proc. 77-37 provides a safe harbor: the acquiring corporation must receive at least 90% of the fair market value of the target's net assets and at least 80% of the fair market value of the target's gross assets held immediately before the transfer. Assets retained by the target, assets used to pay target liabilities not assumed by the acquirer, and assets distributed to shareholders in connection with the reorganization all count as assets not transferred. This is a safe harbor, not an exclusive definition. Verify current IRS guidance at IRS.gov; the Rev. Proc. standard is widely followed but the IRS and courts have addressed "substantially all" on a facts-and-circumstances basis in contexts outside the safe harbor.

The Boot Relaxation and the Liability Cap

The Type C imposes a "solely for voting stock" requirement, like the Type B, but with a statutory relaxation: under IRC 368(a)(2)(B), up to 20% of the total fair market value of the properties acquired may consist of consideration other than voting stock (boot), provided that any liabilities of the target assumed by the acquiring corporation are counted as money paid. This means that in a highly leveraged target, assumed liabilities can quickly exhaust the 20% boot capacity, leaving no room for any cash payment. If assumed liabilities exceed 20% of gross FMV, the transaction fails the Type C test unless structured differently.

The target must distribute all of its properties (including the acquiring-corporation stock received, and any other consideration received) in complete liquidation pursuant to the plan of reorganization. This liquidation requirement means the Type C, unlike the Type B, leaves no surviving target entity. Practitioners using a Type C to acquire a target with valuable regulated licenses should confirm that those licenses transfer by operation of the asset acquisition or that the target can transfer them before completing the liquidation.

Triangular Type C

A triangular Type C is permitted under Treasury Regulation section 1.368-2(d)(4): a subsidiary of the acquiring parent can acquire substantially all of the target's assets for parent voting stock, with the same qualification conditions as the direct Type C, provided the subsidiary's acquisition is made as part of the reorganization plan. The target still must liquidate after the transfer.

Acquisitive Type D: Transfer to a Controlled Corporation (IRC 368(a)(1)(D))

The Type D reorganization covers two very different transactions that share the same statutory language: the acquisitive D and the divisive D. Both involve a transfer of assets by one corporation to another corporation that it controls, followed by a distribution of the transferee's stock to the transferring corporation's shareholders. The key distinction is the post-transfer distribution: an acquisitive D results in the transferor going out of existence (absorbed by the transferee), while a divisive D results in a separation of the transferor's business into two or more independent entities.

In an acquisitive Type D, one corporation transfers all of its assets to another corporation that it controls immediately after the transfer (or that is controlled by the same shareholders), and then distributes the transferee's stock to its own shareholders in complete liquidation. The transaction functions economically like a Type A merger, but is accomplished through an asset transfer rather than a statutory merger. It most commonly arises when two corporations under common control reorganize to combine their operations, or when one affiliated entity absorbs another.

The acquisitive D requires that the transferee corporation be controlled by the transferor corporation or by the same shareholders immediately after the transfer. "Control" for this purpose means 50% of voting power or 50% of the total value of all outstanding stock, a lower threshold than the 80% control test used in IRC 351. The transaction must also satisfy a distribution requirement: the transferor must distribute the transferee's stock (and any other properties received) under IRC 354, 355, or 356.

An acquisitive D without a compliant IRC 355 distribution at the shareholder level is treated differently than a divisive D. The corporate-level nonrecognition under IRC 361 applies to the asset transfer, but the distribution must qualify independently under IRC 354 or 356 for the shareholders to receive nonrecognition treatment. The interplay between the acquisitive D mechanics and the shareholder-level distribution rules requires precise sequencing in the transaction documents.

Divisive Type D: Spin-Off, Split-Off, and Split-Up (IRC 368(a)(1)(D) with IRC 355)

The divisive Type D reorganization is the statutory backbone of the corporate spin-off. Under IRC 368(a)(1)(D), a corporation (the distributing corporation) transfers assets constituting an active trade or business to a newly formed or existing controlled subsidiary (the controlled corporation) and then distributes the controlled corporation's stock to its own shareholders under a plan of reorganization. The IRC 368(a)(1)(D) governs the corporate-level mechanics of that transfer. IRC 355 governs whether the distribution of the controlled corporation's stock is tax-free to the distributing corporation's shareholders.

These two code sections work in tandem. A divisive D reorganization without a qualifying IRC 355 distribution is not a complete tax-free transaction: the distribution of the controlled corporation's stock is taxable to the shareholders as a dividend or a capital gain distribution. Conversely, an IRC 355 distribution that lacks the underlying asset transfer structure of a Type D cannot stand alone as a corporate-level tax-free event under IRC 361. Practitioners must satisfy both provisions simultaneously.

IRC 355 Requirements (Summary)

The distributing and controlled corporations must each be engaged in an active trade or business immediately after the distribution, and each business must have been actively conducted for at least five years before the distribution (the "active business" requirement under IRC 355(b)). The distribution must not be used principally as a device for the distribution of the earnings and profits of either the distributing or controlled corporation (the "device" test). The distributing corporation must distribute control of the controlled corporation, meaning 80% of voting stock and 80% of total shares of each class. Each of the distributing and controlled corporations must satisfy the active business requirement independently. The transaction must be carried out for a legitimate corporate business purpose.

The three common divisive structures are the spin-off (distributing corporation distributes controlled corporation stock pro rata to all shareholders, who end up holding shares in both entities), the split-off (distributing corporation distributes controlled corporation stock to some shareholders in exchange for their distributing corporation stock, creating two separate shareholder groups), and the split-up (distributing corporation transfers all of its assets to two or more controlled corporations and liquidates, distributing the controlled corporation stock to its shareholders).

Anti-Morris Trust rules under IRC 355(e) impose additional restrictions when a spin-off is followed (or preceded) by a 50%-or-greater change in ownership of either the distributing or controlled corporation within a two-year window: the gain-recognition rule of IRC 355(e) treats the stock distributed as if sold for fair market value, eliminating the distributing corporation's nonrecognition benefit.

Type G: Insolvency Reorganization (IRC 368(a)(1)(G))

The Type G reorganization was added to IRC 368 by Congress in 1980 specifically to address the intersection of corporate tax law and bankruptcy. Before Type G existed, transactions in which an insolvent corporation transferred assets to an acquiring corporation as part of a bankruptcy plan were often forced into a Type A or Type C structure, with significant difficulty satisfying the continuity of interest requirement because insolvent targets have no equity value and their shareholders receive little or nothing in the deal.

A Type G reorganization is a transfer of assets by a debtor corporation in a Title 11 bankruptcy case (or in a receivership, foreclosure, or similar proceeding in a federal or state court) to an acquiring corporation, followed by a distribution pursuant to the plan in a manner consistent with the requirements of IRC 354, 355, or 356. The transaction must be approved by the bankruptcy court as part of a confirmed plan of reorganization.

The Creditor-as-Shareholder Rule for COI

The most important modification that makes the Type G workable in insolvency is the treatment of creditors for COI purposes. Under IRC 368(a)(3)(D), in testing whether a Type G reorganization satisfies the continuity of interest requirement, creditors of the target corporation who receive acquiring-corporation stock in exchange for their claims are treated as having a "proprietary interest" in the target corporation for COI purposes. This means that when a bankrupt target's creditors (rather than its equity holders) receive the acquiring corporation's stock as part of the plan of reorganization, those creditors' receipts count toward satisfying COI, even though they were debt holders, not equity holders, immediately before the reorganization.

Without this creditor-as-shareholder rule, the COI requirement would be impossible to satisfy in most insolvency reorganizations: the target's equity is typically worthless, so shareholders receive nothing, and the deal consideration flows entirely to creditors. The Type G specifically solves this by extending the definition of "historic shareholders" for COI purposes to include the creditors who, by virtue of the insolvency, have become the effective economic owners of the debtor.

Business Purpose in Bankruptcy

The business purpose requirement is generally treated as implicit in a Type G reorganization: the bankruptcy process itself supplies a non-tax reason for the restructuring. An insolvent corporation reorganizing under Chapter 11 has obvious business purposes (preserving going-concern value, satisfying creditors, emerging from bankruptcy as a viable enterprise) that satisfy this requirement without independent analysis. Practitioners should nonetheless document the business purpose in transaction documents, particularly if the reorganization involves any unusual features that could suggest a tax-driven motivation.

Loss Carryovers in Type G Reorganizations

Type G reorganizations trigger the IRC 381 carryover rules for the debtor's tax attributes, including NOL carryforwards, tax credits, and earnings and profits. However, the debtor's NOLs are subject to the IRC 382 limitation upon the ownership change that results from the reorganization, and the bankruptcy exception under IRC 382(l)(5) may allow certain creditor-equity conversions to avoid or reduce the IRC 382 limitation if the requirements of that provision are met. The interaction between Type G, IRC 381, IRC 382, and IRC 382(l)(5) is highly complex. Verify current guidance at IRS.gov and consult current case law before advising on post-emergence NOL availability.

Boot Consequences at the Shareholder Level

When a target shareholder receives both qualifying reorganization consideration (stock) and non-qualifying consideration (boot) in an otherwise tax-free reorganization, the result is a partially taxable exchange under IRC 356. The shareholder recognizes gain (but not loss) to the extent of the lesser of: (a) the fair market value of the boot received, or (b) the gain realized on the exchange (the excess of total consideration received, including the FMV of stock received, over the shareholder's basis in the target stock surrendered). Loss is never recognized in a reorganization exchange, even if boot is received.

Dividend Equivalence Under IRC 356(a)(2)

The gain recognized on receipt of boot is ordinarily treated as capital gain. However, IRC 356(a)(2) recharacterizes that gain as ordinary dividend income to the extent the exchange "has the effect of the distribution of a dividend." The dividend-equivalence test asks: if the target shareholder had received only acquiring-corporation stock in the exchange, and then the corporation redeemed a portion of those shares for the boot amount, would that redemption be treated as a dividend under IRC 301 or as a sale under IRC 302(b)?

The dividend determination is made by reference to the shareholder's post-exchange interest in the acquiring corporation (including constructive ownership under IRC 318). Under Rev. Rul. 93-61 and related authority, the question is whether the deemed redemption produces a "meaningful reduction in proportionate interest" in the acquiring corporation. If the exchange does not alter the shareholder's relative position in the acquiring corporation (for example, a controlling shareholder who remains controlling after the merger), the boot is more likely to be dividend income. If the shareholder's interest is genuinely reduced, capital gain treatment is more likely.

The boot dividend analysis is inherently facts-and-circumstances. It must be run separately for each class of shareholder with materially different ownership percentages before and after the reorganization. The dividend-equivalence analysis under IRC 356(a)(2) requires a facts-and-circumstances determination; consult current IRS guidance at IRS.gov before advising on expected tax treatment.

Boot at the Corporate Level: IRC 361

At the corporate level, the target corporation generally does not recognize gain or loss on the transfer of its assets to the acquiring corporation in exchange for stock and boot, under IRC 361(a). However, if the target distributes the boot to its shareholders in connection with the reorganization, IRC 361(b)(1) requires gain recognition to the extent the boot is not so distributed. Boot retained by the target corporation is effectively treated as taxable proceeds. In a Type C, where the target must liquidate, IRC 361(b)(3) provides an additional rule: boot received that consists of property other than money or acquiring-corporation obligations must be distributed within the plan to avoid gain recognition.

Comparison Table: IRC 368 Reorganization Types A, B, C, D, and G

The table below compares the five reorganization types covered in this guide across ten key attributes. Practitioners should use it as a starting screen, not a substitute for detailed analysis of the specific transaction.