A split-off is a corporate division in which a parent company moves a business line into a subsidiary and then offers that subsidiary’s stock to a selected group of its own shareholders, who must hand back their parent-company shares to receive it. When it meets the requirements of Section 355 of the Internal Revenue Code, neither the corporation nor the participating shareholders recognize gain on the exchange. Miss any one of those requirements and the entire distribution becomes taxable.
How a Split-Off Works
The parent company (the “distributing corporation” in tax terms) transfers the assets and liabilities of a business unit to a subsidiary (the “controlled corporation”) in exchange for all of that subsidiary’s stock. The parent then makes an exchange offer to a chosen group of its shareholders: turn in your parent shares and receive subsidiary stock in return. The offer is voluntary. Only shareholders who tender end up owning the separated business.
Two independent companies come out the other side. The parent keeps its remaining operations with a smaller share count, because the tendered shares are retired. The subsidiary runs the separated business, owned entirely by the shareholders who took the deal.
Companies use split-offs for practical reasons. They can resolve disputes between shareholder factions who disagree about the company’s direction, letting one group take a business unit and go. They can shed a division that no longer fits the parent’s strategy. They can remove regulatory friction that comes from housing unrelated businesses under one roof.
How a Split-Off Differs From a Spin-Off or Split-Up
Section 355 authorizes three forms of corporate division, and they are easy to mix up. The differences turn on who receives stock and whether shareholders give anything up.
- In a spin-off, the parent distributes subsidiary stock to every shareholder on a pro-rata basis. Nobody surrenders parent shares. Everyone ends up holding both stocks.
- In a split-off, the parent distributes subsidiary stock only to shareholders who choose to exchange their parent shares for it. The distribution is not pro rata, and participants give up their parent-company ownership.
- In a split-up, the parent distributes stock of two or more subsidiaries in exchange for all of its outstanding shares, and the parent itself ceases to exist.
The split-off sits in the middle. It targets specific shareholders instead of everyone, and it shrinks the parent’s outstanding share count. That makes it a good fit when one faction of shareholders wants out while the other stays.
What Makes a Split-Off Tax-Free
A split-off qualifies for nonrecognition only if it clears a set of requirements built into Section 355 and the 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 rates), and the distributing corporation can recognize corporate-level gain.
Corporate Business Purpose
The transaction has to be driven by a real, substantial, non-tax business reason tied to the distributing corporation, the controlled corporation, or their affiliated group. The regulations describe this as “a real and substantial non Federal tax purpose germane to the business” of those entities. A shareholder’s personal planning goals do not qualify on their own, and reducing federal taxes is explicitly not enough. Resolving a regulatory conflict, attracting outside investment to an undervalued division, enabling business-specific management incentive plans, and separating operations whose regulatory requirements collide with each other are all accepted purposes.
Active Trade or Business
Both the distributing and the controlled corporations must be actively conducting a trade or business immediately after the distribution. Each business must also have been actively conducted throughout the five-year period ending on the distribution date, and neither can have been acquired in a taxable transaction during that window. Holding investments, rental property, or idle assets does not count.
The five-year rule blocks a common workaround: buying a business, holding it briefly, and spinning it off to extract cash. Both sides need genuine operating history under the corporate umbrella.
The Device Test
The split-off cannot be used principally as a device to distribute earnings and profits at favorable 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 essentially a disguised dividend. Concentrations of cash or liquid assets that the business does not need, and a planned sale of either company’s stock shortly after the distribution, both point toward device. A strong, independently verifiable business purpose and public, widely held ownership of the distributing corporation both point away from it. The stronger the device evidence, 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 keep a continuing equity interest in each of the resulting corporations. The regulation frames the split-off as effecting “only a readjustment of continuing interests in the property of the distributing and controlled corporations.” There is no fixed percentage. The IRS looks at whether the prior ownership group, in the aggregate, retains enough equity in both entities to show a change in corporate form rather than a disposition. A pre-arranged cash-out of the departing shareholders shortly after the exchange is the classic way to break continuity.
Distribution of Control
The distributing corporation must give up control of the subsidiary. It can either distribute every share of subsidiary stock it holds or distribute at least enough to constitute “control” under Section 368(c): at least 80% of the total combined voting power and at least 80% of the shares of every other class. Retaining more than 20% of any class fails this test unless the IRS accepts that the retention is not motivated by tax avoidance.
When Cash or Other Property Enters the Deal
A tax-free split-off is a stock-for-stock exchange. Anything else the shareholder receives — cash, excess debt securities, other property — is “boot,” and Section 356 governs it.
The shareholder recognizes gain, but only up to the boot received. If the exchange produces an overall loss, the loss is not recognized at all. Any recognized gain gets a second look: if the exchange “has the effect of the distribution of a dividend,” some or all of the gain is recharacterized as dividend income (up to the shareholder’s ratable share of accumulated earnings and profits) rather than capital gain. Whatever remains is capital gain from the sale of property.
Because boot triggers immediate tax on gain that would otherwise defer, deals are usually structured to avoid it. Even a small amount of cash added to even out the exchange ratio can create taxable boot for every participating shareholder.
Corporate-Level Traps: Sections 355(d) and 355(e)
Two additional statutory rules can strip out the tax benefit at the corporate level even when everything else lines up. Both target divisions connected to an acquisition.
Section 355(d): Purchased Stock
If any person holds “disqualified stock” — shares acquired by purchase during the five-year period ending on the distribution date — amounting to a 50% or greater interest in either the distributing or controlled corporation immediately after the distribution, the distribution is disqualified. The distributing corporation then recognizes gain as if it had sold the controlled corporation’s stock at fair market value. Shareholders are not directly affected. The rule targets acquirers who buy a controlling stake in a parent and then engineer a split-off to pull an appreciated subsidiary out without corporate-level tax.
Section 355(e): Acquisitions Connected to the Distribution
Section 355(e) is broader. 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 corporation, the distributing corporation recognizes gain. Shareholders again are not directly hit.
Any acquisition of a 50% or greater interest occurring in the four-year window that begins two years before the distribution is presumed to be part of such a plan. The presumption is rebuttable, but the taxpayer carries the burden of proving the distribution and the acquisition were independent. This provision, sometimes called the anti-Morris Trust rule, effectively blocks splitting off a subsidiary and immediately merging one of the resulting entities with a third party under a prearranged deal.
How Shareholders Figure Their Basis Afterward
Basis carries over rather than resetting. Under Section 358, a 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 bought at different times and prices must compute the exchange separately for each block. Gains on one block cannot be netted against losses on another. If a shareholder ends up holding both retained parent stock and new subsidiary stock, basis is allocated between them by relative fair market values on the distribution date. Getting this allocation wrong distorts the gain reported whenever either position is later sold.
Reporting the Transaction
The distributing corporation must attach a disclosure statement to its federal tax return for the year of the distribution. Treasury Regulation 1.355-5 sets out what it needs to contain: the name and employer identification number of the controlled corporation, the name and taxpayer identification number of every significant distributee, the date of the distribution, and the aggregate fair market value of the distributed stock or securities. If the distributing corporation is a controlled foreign corporation, each U.S. shareholder must include the same statement with their own return.
When the split-off involves the dissolution or partial liquidation of the parent, Form 966 must be filed within 30 days of adopting the resolution or plan. Any later amendment triggers another Form 966 within 30 days. Those deadlines are firm and easy to miss inside a larger restructuring timetable.