Tax-Free Spin-Off Requirements Under Section 355

To qualify as a tax-free spin-off under Section 355, a distribution has to clear six interlocking hurdles: the parent must “control” the subsidiary by owning at least 80% of the vote and 80% of every other class of stock; both companies must be actively running trades or businesses with at least five years of history; the transaction must serve a real corporate business purpose that actually requires distributing stock to shareholders; it cannot be used principally as a device for bailing out earnings and profits; the historic shareholders must keep a continuing equity interest in both entities; and the deal must avoid the anti-abuse triggers in Sections 355(d) and 355(e) that treat certain acquisition-linked distributions as taxable at the corporate level.¹ Miss any one and the distribution becomes taxable, usually at both corporate and shareholder levels.

The 80% Control and Distribution Rule

The distributing corporation must control the controlled corporation immediately before the distribution. Section 368(c) defines control as ownership of stock possessing at least 80% of the total combined voting power of all voting classes and at least 80% of the total number of shares of every other class.² Both prongs matter. A parent holding 90% of the vote but only 70% of a nonvoting preferred class does not have control.

The parent then has to distribute either all of the controlled corporation stock and securities it holds, or at least enough to constitute control (that same 80% figure). Full distribution is the norm. Retaining any shares creates an added burden: the parent has to establish to the IRS that the retention is not part of a plan to avoid federal income tax.¹

Section 355 accommodates three structural variants — a straight spin-off, a split-off in which shareholders exchange parent stock for subsidiary stock, and a split-up in which the parent liquidates into two or more new corporations — but the requirements below apply to all of them.

Non-Qualifying Property (Boot)

The distribution has to consist solely of stock or securities of the controlled corporation. If the parent also hands out cash or other non-qualifying property, that property is boot. Shareholders receiving boot recognize gain up to the lesser of the boot’s value or their built-in gain in the distributing corporation stock, and the parent itself recognizes gain on any appreciated non-qualifying property distributed, as if it had sold that property at fair market value.¹ Cash paid in lieu of fractional shares is a common (and usually small) example.

Active Trade or Business for Five Years, on Both Sides

Both the distributing and controlled corporations must be engaged in the active conduct of a trade or business immediately after the distribution. This is the most objective of the Section 355 tests and the one that trips up the most transactions. It has three moving parts.

The Five-Year History

Each qualifying business must have been actively conducted throughout the entire five-year period ending on the distribution date.¹ The clock runs independently on the business the parent keeps and the business it separates. A company cannot launch a new line in year three and spin it off in year five, and preparatory or startup activity inside the window does not count toward the requirement.

What Counts as Active

A business qualifies only if the corporation carries on substantial managerial and operational functions through its own officers and employees.³ Collecting dividends, holding investment securities, or owning property purely for appreciation does not qualify. Manufacturing, retail operations, and technology development are the classic examples on the other side of the line.

Real estate holdings draw particular scrutiny. Simply owning and leasing property usually fails. A corporation that runs a commercial building through its own staff — maintenance, security, tenant services — is much more likely to meet the standard. The line is whether the corporation’s employees are doing substantial, ongoing operational work tied to the business itself.

The Bar on Purchased Businesses

A business does not qualify if it, or control of the corporation conducting it, was acquired in a taxable transaction within the five-year pre-distribution window.¹ A parent cannot buy a subsidiary for cash and immediately spin it off tax-free. The business has to have been developed internally or picked up in a tax-free reorganization. If control was acquired in a nontaxable exchange, the five-year test is satisfied as long as the underlying business itself operated for the full five years.

Growth inside the window is generally fine. Expanding an existing business does not restart the clock. But an expansion so dramatic that it amounts to a new line of business may not clear the five-year test as to that new portion.

A Real Business Purpose That Needs the Distribution

Every Section 355 distribution has to be motivated by one or more genuine corporate business purposes. This is a regulatory requirement, not a statutory one, and it kills more proposed spin-offs than any other test. The Treasury Regulations say the transaction qualifies only if it is “motivated, in whole or substantial part, by one or more corporate business purposes,” and those purposes must be “real and substantial” and “germane to the business” of the distributing corporation, the controlled corporation, or the affiliated group.⁴ Tax savings alone never qualify.

The IRS has accepted a range of purposes in private letter rulings and published guidance: separating a high-risk division from a low-risk one to improve borrowing terms, resolving management or shareholder disputes that threaten operations, reducing regulatory compliance costs in heavily regulated industries, and using equity compensation in a more focused public company to attract or retain key talent. The purpose has to be real and documented, not reverse-engineered to justify a distribution already decided upon.

Having a good reason is not enough on its own. The regulations further require that the distribution of controlled corporation stock specifically be necessary to accomplish the business purpose. If the same objective could be reached through a less tax-significant transaction that does not involve distributing stock to shareholders, the spin-off fails this test.⁴ For example, if a regulatory compliance problem could be solved by dropping the business into a wholly owned subsidiary without distributing its stock, the distribution is unnecessary.

Not a Device for Distributing Earnings and Profits

Section 355(a)(1)(B) requires that the transaction not be used principally as a device for distributing earnings and profits. In plainer terms, the spin-off cannot be a disguised dividend. The concern is that shareholders could use the mechanics of a spin-off to pull out corporate earnings at capital gains rates, by selling the distributed stock, instead of receiving a taxable dividend.¹

The Treasury Regulations list factors that point toward device treatment.⁴ A pro rata distribution, where every shareholder gets controlled corporation stock in proportion to existing holdings, looks more like a dividend than a structural separation. A prearranged sale of the distributed stock is strong evidence of device — the larger the percentage sold and the shorter the interval, the worse it looks. Significant non-business assets on either side, like idle cash or liquid investments, also raise suspicion, because those assets could have been paid out as a dividend instead.

Factors cutting the other way include a strong corporate business purpose, a widely held publicly traded distributing corporation where no single shareholder can engineer a disguised dividend, and the absence of any prearranged sale. The determination is made by weighing all facts and circumstances, and no single factor is automatically disqualifying.

Continuity of Shareholder Interest

The shareholders who owned the distributing corporation before the spin-off have to maintain a continuing equity stake in both companies afterward. This continuity of interest requirement ensures the transaction is a genuine rearrangement of corporate structure rather than a disguised sale or liquidation.⁴

There is no bright-line percentage in the statute. Regulatory examples suggest that 50% aggregate ownership retained by historic shareholders is sufficient, while 20% is not. Anything between involves judgment and risk. Sales or dispositions of a large portion of stock shortly after the distribution can break continuity, and when a post-spin merger or acquisition is integrated with the distribution itself, the resulting shift in ownership may retroactively disqualify the spin-off.

The Anti-Abuse Rules: Sections 355(d) and 355(e)

Two provisions in Section 355 target spin-offs that are really a prelude to selling a business. They have different triggers and different lookback windows, but both strip the parent’s nonrecognition treatment and force it to recognize gain as if it had sold the controlled corporation stock at fair market value.

Section 355(d): Disqualified Distributions

Section 355(d) applies when, immediately after the distribution, any person holds “disqualified stock” amounting to 50% or more of the vote or value of either the distributing or the controlled corporation. Stock is disqualified if it was acquired by purchase within the five-year period ending on the distribution date.¹ Controlled corporation stock received by these shareholders is also disqualified to the extent it traces back to the purchased distributing corporation stock. Shareholders are not directly taxed by this provision, but corporate-level gain can be enormous.

Section 355(e): The Anti-Morris Trust Rule

Section 355(e) is broader and more commonly encountered. It applies when the distribution is part of a plan under which one or more persons acquire 50% or more of the vote or value of either the distributing or controlled corporation.¹ The statute creates a rebuttable presumption that any qualifying acquisition inside a four-year window — opening two years before the distribution and closing two years after — is part of a plan. Acquisitions inside that window are presumed related unless the corporation proves otherwise, and acquisitions outside it are presumed unrelated, though the IRS can still challenge them.

Whether a distribution and acquisition are actually part of a plan comes down to facts and circumstances. The regulations flag factors on both sides, including pre-distribution discussions with the acquirer as evidence of a plan and unexpected capital needs as evidence against one. There are also specific safe harbors that automatically treat an acquisition as not plan-related. One covers certain public-market trading where the buyers and sellers are not insiders or large shareholders, defined as those owning 10% or more of any class of stock.⁵

How the Two Rules Differ

Section 355(d) looks backward at whether someone purchased into the parent before the spin-off, using a five-year lookback from the distribution date. Section 355(e) looks at whether the spin-off is connected to an acquisition of either entity, using the four-year window centered on the distribution. Both impose corporate-level gain, but Section 355(d) can apply without a plan connecting the purchase to the distribution. A single transaction can trigger both.

What Happens When the Requirements Are Met — and When They Are Not

When the spin-off is structured as a divisive reorganization under Sections 368(a)(1)(D) and 355, Section 361 gives the distributing corporation nonrecognition treatment on the distribution of “qualified property,” which includes stock and securities of the controlled corporation.⁶ Appreciated property that is not qualified triggers gain as if it had been sold at fair market value, and if distributed property is subject to liabilities, the fair market value used for the gain calculation cannot be less than the liability amount. This corporate-level protection is what makes Section 355 valuable; for large companies, the built-in gain in a subsidiary’s stock can run into the billions. Sections 355(d) and 355(e) work by stripping this protection away.

Shareholders in a qualifying spin-off do not recognize gain or loss when they receive controlled corporation stock. They do, however, need to split their existing basis in the distributing corporation stock between the two companies, based on relative fair market values immediately after the distribution.⁷ The distributing corporation typically sends an information letter with the allocation percentages, but shareholders are responsible for the calculation on their own returns.

If the distribution fails to qualify, the fallout hits both levels. The distributing corporation recognizes gain as if it sold the controlled corporation stock at fair market value.¹ Shareholders treat the stock they received as a taxable distribution, characterized as a dividend to the extent of the distributing corporation’s earnings and profits, then as a return of capital reducing basis, then as capital gain. The double-taxation outcome is why companies invest heavily in structuring these transactions correctly.

Getting IRS Comfort Before Closing

Given the stakes, corporations planning a spin-off often seek a private letter ruling before executing the transaction. A favorable ruling provides comfort that the IRS has reviewed the facts and agrees the distribution qualifies. But the IRS limits what it will rule on: it generally does not issue advance rulings on whether a transaction satisfies the device prohibition, the business purpose requirement, or whether a distribution is part of a plan under Section 355(e).

Under Rev. Proc. 2017-52 and subsequent guidance, the IRS issues “transactional rulings” covering the overall federal tax consequences of a covered Section 355 transaction and “significant issue rulings” on specific technical questions. Rev. Proc. 2025-30 updated ruling procedures for certain liability assumption and debt satisfaction issues that come up in divisive reorganizations, and it encourages pre-submission conferences before filing a request.⁸ Most large spin-offs are preceded by months of engagement with the IRS National Office, and because rulings do not cover the device, business purpose, or plan questions, companies rely heavily on opinions from outside tax counsel to document compliance on those points.

1
Office of the Law Revision Counsel. 26 U.S. Code 355 – Distribution of Stock and Securities of a Controlled Corporation
2
Office of the Law Revision Counsel. 26 U.S. Code 368 – Definitions Relating to Corporate Reorganizations
3
eCFR. 26 CFR 1.355-3 – Active Conduct of a Trade or Business
4
eCFR. 26 CFR 1.355-2 – Limitations
5
eCFR. 26 CFR 1.355-7 – Recognition of Gain on Certain Distributions of Stock or Securities in Connection With an Acquisition
6
Office of the Law Revision Counsel. 26 U.S. Code 361 – Nonrecognition of Gain or Loss to Corporations
7
eCFR. 26 CFR 1.358-2 – Allocation of Basis Among Nonrecognition Property
8
Internal Revenue Service. Revenue Procedure 2025-30