A split-off is a corporate division in which a parent company transfers a business line to a subsidiary and then offers that subsidiary’s stock to selected shareholders in exchange for their parent company shares. Participating shareholders hand back their parent stock and walk away owning the separated business; everyone else keeps their parent shares unchanged. When the transaction meets the conditions of Section 355 of the Internal Revenue Code, neither the corporation nor the exchanging shareholders recognize gain at the time of the exchange. Miss one of those conditions, and the whole distribution becomes taxable.
How the Exchange Works
The parent, called the “distributing corporation” in the tax code, first transfers the assets and liabilities of the business unit to a subsidiary (the “controlled corporation”). In return, the parent receives all of the subsidiary’s stock. That internal step is tax-free to the corporation under Section 361, provided the parent controls the subsidiary immediately afterward.
The parent then makes a formal exchange offer to its shareholders. The offer identifies who is eligible to participate, states the exchange ratio of subsidiary shares per parent share, and sets a tender period. Each eligible shareholder decides individually whether to take the deal. Those who tender give up some or all of their parent stock and receive subsidiary stock; those who don’t tender keep what they had.
When the exchange closes, two independent companies remain. The parent continues with its other operations and fewer outstanding shares, because the tendered stock is retired. The subsidiary operates the separated business, now owned entirely by the shareholders who participated. Common motivations include resolving disputes between shareholder factions headed in different directions, shedding a division that no longer fits the parent’s strategy, and removing regulatory frictions created by housing unrelated businesses together.
Split-Off vs. Spin-Off vs. Split-Up
Section 355 covers three forms of corporate division. They differ in how stock moves and whether shareholders give anything up.
- In a spin-off, the parent distributes subsidiary stock to all shareholders pro rata. Nobody surrenders parent shares. Every shareholder ends up holding both companies in the same proportion they held before.
- In a split-off, the parent distributes subsidiary stock only to shareholders who voluntarily exchange their parent shares for it. The distribution is not pro rata, and participants give up their ownership in the parent.
- In a split-up, the parent distributes stock of two or more subsidiaries in exchange for all outstanding parent shares, and the parent ceases to exist.
The split-off sits in the middle. It targets a specific shareholder group rather than distributing to everyone, and it shrinks the parent’s outstanding share count. That makes it a natural tool when one faction wants out while another wants to stay with the remaining business.
What Makes a Split-Off Tax-Free
Nonrecognition under Section 355 depends on several conditions drawn from the statute and Treasury regulations. If any one fails, the distribution is taxable: shareholders are treated as receiving a dividend to the extent of earnings and profits (taxed at ordinary income rates), and the distributing corporation may recognize corporate-level gain.
Corporate Business Purpose
The transaction must be driven by a real, substantial, non-tax business reason tied to the distributing corporation, the controlled corporation, or their affiliated group. Treasury regulations define this as “a real and substantial non Federal tax purpose germane to the business” of those entities. A shareholder’s personal planning goals, standing alone, do not qualify, and reducing federal taxes is explicitly insufficient. Acceptable purposes include resolving a regulatory conflict, attracting outside investment to a division that is undervalued inside the combined entity, enabling management incentive plans tied to a specific business, or separating operations whose regulatory requirements create friction for each other.
Active Trade or Business
Both the distributing and controlled corporations must be engaged in the active conduct of a trade or business immediately after the distribution. The statute adds a look-back: each business must have been actively conducted throughout the five-year period ending on the distribution date, and it cannot have been acquired in a taxable transaction during that window. Holding investments, rental property, or idle assets does not count.
The five-year seasoning rule prevents a company from buying a business, parking it briefly, and spinning it off to extract value. Both sides of the division need genuine operating histories.
The Device Test
The split-off cannot be used principally as a device to distribute corporate earnings and profits at favorable tax rates. This is the anti-abuse backstop of Section 355. The IRS weighs “device factors” against “non-device factors” to decide whether the transaction is really a dressed-up dividend.
Factors suggesting a device include a large concentration of cash or liquid assets not needed for business operations in either corporation, and a planned sale of either company’s stock shortly after the distribution. Factors cutting the other way include a strong, independently verifiable business purpose and the fact that the distributing corporation’s stock is publicly traded and widely held. The stronger the evidence of device, the stronger the business purpose has to be to overcome it.
Continuity of Interest
One or more persons who owned the enterprise before the distribution must maintain a continuing equity interest in each of the resulting corporations. The regulations frame this as ensuring the transaction “effects only a readjustment of continuing interests in the property of the distributing and controlled corporations.” There is no bright-line percentage. The IRS looks at whether the prior ownership group, in the aggregate, retains enough equity in both entities to show the division is a change in corporate form rather than a disposition.
Continuity fails if, as part of the same plan, an outside buyer acquires so much stock that the original shareholders collectively no longer hold a meaningful stake in one of the two resulting companies. A pre-arranged cash-out of the departing shareholders shortly after the exchange is the classic failure pattern.
Distribution of Control
The distributing corporation must give up control of the subsidiary. It can either distribute every share it holds, or distribute at least enough to constitute “control” under Section 368(c): at least 80% of the total combined voting power of all voting stock classes, and at least 80% of the total shares of every other class of stock. If the parent keeps more than 20% of any class, the distribution fails this test unless the IRS is satisfied the retention is not motivated by tax avoidance.
When Shareholders Receive Cash or Other Property
A tax-free split-off contemplates stock for stock. When shareholders receive cash, excess debt securities, or any other non-stock property alongside the subsidiary shares, that extra value is called “boot,” and Section 356 governs the consequences.
The shareholder recognizes gain, but only up to the amount of boot received. If the shareholder has an overall loss on the exchange, the loss is not recognized at all. The recognized gain then faces an added layer of scrutiny: if the exchange “has the effect of the distribution of a dividend,” some or all of the gain is recharacterized as dividend income rather than capital gain, up to the shareholder’s ratable share of the corporation’s accumulated earnings and profits. Any remaining recognized gain is treated as capital gain from the sale of property.
Because boot triggers immediate tax on what would otherwise be deferred, careful structuring avoids it. Even small amounts of cash included to equalize an exchange ratio can create taxable boot for every participating shareholder.
Rules That Can Tax the Corporation Even If Shareholders Are Protected
Two statutory provisions can strip the tax benefit at the corporate level even when the shareholder-side requirements are met. Both target transactions where the division is connected to an acquisition.
Section 355(d): Purchased Stock
If any person holds “disqualified stock” in either the distributing or controlled corporation amounting to a 50% or greater interest immediately after the distribution, the transaction becomes a disqualified distribution. Disqualified stock means shares acquired by purchase during the five-year period ending on the distribution date. The consequence falls on the corporation: the distributing corporation recognizes gain as though it sold the controlled corporation’s stock at fair market value. The target is an acquirer who buys a controlling stake in the parent and then engineers a split-off to pull out an appreciated subsidiary without corporate-level tax.
Section 355(e): Acquisitions Connected to the Distribution
Section 355(e) sweeps more broadly. If the distribution is part of a plan (or series of related transactions) under which one or more persons acquire a 50% or greater interest in either the distributing or controlled corporation, the distributing corporation recognizes gain on the distribution. Shareholders are not directly affected; the tax falls on the company.
The statute creates a strong presumption: any acquisition of a 50% or greater interest during the four-year window beginning two years before the distribution date is presumed part of such a plan. The presumption is rebuttable, but the taxpayer bears the burden of proving the distribution and the acquisition were genuinely independent. This provision, sometimes called the anti-Morris Trust rule, effectively blocks a company from splitting off a subsidiary and immediately merging one of the resulting entities with a third party in a prearranged deal.
How Participating Shareholders Calculate Basis in the New Stock
Shareholders who tender parent stock in a split-off do not reset their basis to fair market value. Section 358 carries their basis over. The shareholder’s basis in the subsidiary stock received equals the basis of the parent stock surrendered, decreased by any cash or fair market value of other boot received, and increased by any gain recognized on the exchange.
Shareholders who held multiple blocks of parent stock purchased at different times and prices have to compute the exchange separately for each block. Gains on one block cannot be netted against losses on another. The allocation of basis between any retained parent stock and the new subsidiary stock follows the relative fair market values of each on the distribution date. The allocation matters for future sales: an incorrect split can lead to over- or under-reporting gain when either position is eventually sold.