Splitting a company into two independent entities can be done without immediate tax on the corporation or its shareholders, but only if the transaction satisfies Internal Revenue Code Section 355 and a handful of related anti-abuse rules. Beyond the tax analysis, the split requires choosing a legal structure, dividing every asset and liability, protecting creditors, obtaining board and shareholder approval, and filing formation documents with the state and, for public companies, registration materials with the SEC. The stakes are high on the tax side: a misstep can trigger corporate-level gain on appreciated assets and dividend treatment for shareholders, wiping out the value the separation was supposed to create.
Three Ways to Structure the Split
How shareholders end up holding stock in the new entity determines which of three structures you are using.
Spin-Off
A spin-off is the most common approach. The parent transfers a business unit’s assets and liabilities to a newly formed subsidiary, then distributes that subsidiary’s stock to existing shareholders in proportion to their current holdings. Shareholders end up owning both companies without giving anything up, and both entities continue operating independently.
Split-Off
A split-off uses an exchange offer. Shareholders choose whether to swap some or all of their parent stock for shares in the new entity. Those who participate reduce their ownership in the original company; those who don’t stay put. This structure works well when shareholder factions disagree about direction, because one group can exit the parent entirely.
Split-Up
A split-up ends the original company. The parent transfers all of its assets and liabilities to two or more newly formed corporations, distributes their stock to shareholders, and then dissolves. One company is fully replaced by multiple successors.
Qualifying for Tax-Free Treatment Under Section 355
By default, a corporate separation is a taxable event. Shareholders would owe tax on the stock they receive as if it were a dividend, and the distributing corporation would owe tax on the built-in gain in the assets it moved out. Section 355 is the only route to avoid both layers of tax, and it allows tax-free treatment when the split is a genuine business restructuring rather than a disguised distribution of earnings.1Office of the Law Revision Counsel. 26 U.S. Code 355 – Distribution of Stock and Securities of a Controlled Corporation
The statute and Treasury Regulations impose several interlocking requirements. Miss any one of them and the whole transaction becomes taxable.
Control
The distributing corporation must own stock representing “control” of the subsidiary it plans to distribute. Control has a precise definition under IRC Section 368(c): at least 80% of the total combined voting power of all classes of voting stock, plus at least 80% of the total shares of every other class of stock.2Office of the Law Revision Counsel. 26 U.S. Code 368 – Definitions Relating to Corporate Reorganizations In the distribution itself, the parent must either distribute all the subsidiary stock it holds or distribute at least enough to meet the 80% threshold and convince the IRS that any retained shares were not held for tax-avoidance reasons.
Active Trade or Business
Both the distributing corporation and the controlled corporation must each be conducting an active trade or business immediately after the split. Each business must have been actively conducted for the five-year period ending on the distribution date.3Internal Revenue Service. Rev. Rul. 2001-29 – Active Conduct of a Trade or Business
The five-year history carries a catch. The business cannot have been acquired in a taxable transaction during that window. If the parent bought a business three years ago and recognized gain on the purchase, that business does not qualify. The IRS also looks for substantial managerial and operational involvement, so a largely passive holding in an enterprise someone else runs will not pass.
Not a Device for Distributing Earnings
The separation cannot function primarily as a device for distributing earnings and profits at capital gains rates instead of as a taxable dividend. A subsequent sale of stock by shareholders does not by itself prove device status, but a prearranged sale points the other way. The IRS weighs several factors: a large percentage of stock sold shortly after the separation is strong evidence, and a disproportionate allocation of cash, investment securities, or other non-operating assets to one entity signals an intent to extract value. A separation is less likely to be flagged when the distributing corporation has minimal accumulated earnings and profits, because there is little dividend to disguise in the first place.
Business Purpose
The separation must be driven by a real, substantial business reason unrelated to reducing federal income taxes. Treasury Regulations describe this as a purpose “germane to the business” of the distributing or controlled corporation.4eCFR. 26 CFR 1.355-2 – Limitations Common accepted purposes include resolving irreconcilable disputes among shareholders, meeting regulatory requirements that prevent one entity from holding certain businesses, and enabling each company to pursue a capital structure suited to its own risk profile. Tax savings alone will never satisfy this requirement, and the stated purpose must be the genuine motivation, not a rationale assembled after the deal is drafted.
Continuity of Interest
The pre-split shareholders must maintain a continuing equity stake in both entities. The regulation does not set a specific percentage, but tax practitioners generally treat aggregate ownership of roughly 50% of each entity’s stock value as the minimum safe zone, borrowing from the continuity of interest standards used in corporate reorganizations. Section 355 is meant for restructurings where the same economic owners continue in a modified form, not for transactions that are really a sale to new buyers.
The Two Anti-Abuse Traps: Sections 355(d) and 355(e)
Passing the core Section 355 tests isn’t the end of the analysis. Two additional provisions can still impose corporate-level tax when a separation is connected to outsiders acquiring control.
Section 355(e): The Anti-Morris Trust Rule
If the distribution is part of a plan under which one or more persons acquire 50% or more of the stock (by vote or value) of either the distributing or the controlled corporation, the distributing corporation must recognize gain on the appreciated stock it distributed. The tax hits the corporation, not individual shareholders, but on a large separation the bill can be enormous.
Any acquisition occurring within two years before or after the distribution is presumed to be part of such a plan unless the company can prove otherwise. This is where many post-separation merger discussions run into trouble. A company that spins off a division and then merges with an acquirer within two years faces intense IRS scrutiny over whether the two steps were linked from the start.
Section 355(d): Disqualified Distributions
Section 355(d) targets a different pattern. If any person holds “disqualified stock” representing a 50% or greater interest in either entity immediately after the distribution, the distributing corporation recognizes gain. Disqualified stock means shares acquired by purchase within the five-year period ending on the distribution date. The concern is concentrated ownership built through recent purchases: if a private equity fund spent the last four years accumulating a majority stake in the parent, a subsequent spin-off would likely trigger 355(d) and force the parent to recognize gain on the distributed stock.
What a Failed Section 355 Transaction Costs
A failed separation hits both sides of the ledger. The distributing corporation recognizes gain as though it had sold the controlled corporation’s stock at fair market value on the distribution date. For a separation involving billions in appreciated assets, that corporate-level tax alone can dwarf the deal’s expected benefits.
Shareholders fare no better. They owe tax on the fair market value of the controlled corporation stock they receive. The IRS treats the distribution as a dividend to the extent of the distributing corporation’s accumulated earnings and profits, with any excess taxed as capital gain. Between the corporate tax and the shareholder tax, a failed split can consume a large portion of the value the transaction was supposed to unlock. That is why virtually every significant separation involves months of tax analysis and, in many cases, a Private Letter Ruling from the IRS before closing.
Dividing Assets, Liabilities, and Contracts
The mechanical work of a separation is allocating everything the company owns and owes to one entity or the other. This process also determines whether the active trade or business requirement holds up in practice.
Valuation and Allocation
Every tangible and intangible asset needs a fair market valuation: real estate, equipment, patents, trademarks, software, customer lists, goodwill. Liabilities go through the same exercise. Outstanding loans, accounts payable, lease obligations, pending litigation, and environmental cleanup responsibilities are each assigned to the entity whose business generated them.
The division must avoid stacking cash, marketable securities, and other non-operating assets disproportionately into one company. That lopsided pattern is exactly what the device test is designed to catch. The full schedule of transfers becomes an exhibit to the Separation Agreement, the master contract governing the transaction.
Contract Assignment and IP Transfers
Commercial contracts, vendor agreements, customer relationships, and real estate leases must be formally assigned to whichever successor entity will carry on that relationship. Many agreements include change-of-control or anti-assignment clauses requiring the counterparty’s written consent, and failing to obtain that consent can let the counterparty terminate the contract. Intellectual property transfers need their own instruments to legally move ownership of patents, trademarks, and licensed software.
Employees and Benefits
Every employee must be assigned to one entity or the other. If the separation triggers significant layoffs, federal law may require 60 days’ advance notice under the Worker Adjustment and Retraining Notification Act.5U.S. Department of Labor. WARN Act Compliance Assistance Retirement plans, health insurance, and other benefits governed by the Employee Retirement Income Security Act must be formally divided or replicated for the new workforce.6U.S. Department of Labor. ERISA The new company needs its own payroll, HR, and benefits infrastructure running by day one, or a transitional arrangement in place to bridge the gap.
Creditor Protections and Debt Covenants
A split creates obvious risk for creditors. If the separation strips the distributing corporation of assets while its debts remain, or loads a successor with obligations it cannot service, creditors have legal recourse.
Fraudulent Transfer Exposure
A separation can be challenged as a fraudulent transfer if the distributing corporation received less than reasonably equivalent value for the assets it transferred and was insolvent at the time, was rendered insolvent by the transfer, or was left with unreasonably small capital to operate. Creditors who succeed can recover the transferred property or its value from the recipient entity. Federal bankruptcy law reaches transfers made within two years before a bankruptcy filing, while state fraudulent transfer statutes typically reach back four to six years. The standard defense is a solvency opinion from an independent financial advisor confirming that both entities are adequately capitalized after the split.
Existing Bonds and Credit Agreements
Bondholders and lenders rarely stay quiet during a corporate split. Because spin-offs are structured as distributions of subsidiary stock, they can trigger restricted-payment covenants in high-yield bond indentures. If the value of the distributed stock exceeds what the covenants permit, the company must either obtain bondholder consent or redeem the bonds before proceeding. Asset sale covenants may also apply, requiring the separation to be conducted at fair market value with proceeds used to repay senior debt or purchase replacement assets within a set period. Investment-grade covenants are usually less restrictive, but every credit agreement needs to be reviewed before an announcement.
Board Approval, Shareholder Votes, and Fiduciary Duties
The board of directors formally approves the separation by resolution. For most public companies, a shareholder vote follows, typically requiring approval by a majority of outstanding shares entitled to vote.
Directors owe fiduciary duties throughout the process, and conflicts of interest raise the level of scrutiny. When insiders or controlling shareholders stand to benefit disproportionately from the structure, a special committee of independent directors is usually formed to evaluate and negotiate the terms. Under Delaware law, which governs many large corporations, a conflicted transaction that has not gone through proper procedural safeguards can be subjected to “entire fairness” review, requiring directors to prove the transaction was fair in both process and price. Approval by a properly constituted special committee can shift the burden of proof and bring the transaction within statutory safe harbors.
Shareholders must receive a proxy statement disclosing the separation’s terms, business purpose, financial impact, and risk factors. Public companies must comply with Schedule 14A and file the proxy statement with the SEC before distributing it.7eCFR. 17 CFR 240.14a-101 – Schedule 14A Information Required in Proxy Statement
State Formation Filings and SEC Registration
The new entity’s legal existence begins when its foundational documents are filed with the state where it will be incorporated. The specific document varies by state but is generally called the Certificate of Incorporation or Articles of Incorporation. Filing fees run from nominal to a few hundred dollars depending on the state. In a split-up, the original company must also file articles of dissolution with its state of incorporation once all assets have been distributed.
For a public company, the controlled corporation must file a Form 10 registration statement with the SEC to register its securities under Section 12 of the Securities Exchange Act. The Form 10 functions as the new company’s initial public disclosure and includes a full description of the business, risk factors, management compensation, audited financial statements under Regulation S-X, and roughly the same scope of information investors would see in an IPO prospectus.8U.S. Securities and Exchange Commission. Form 10 – General Form for Registration of Securities
IRS Reporting and Private Letter Rulings
The distributing corporation must report a tax-free distribution by attaching a detailed statement to its federal income tax return for the year of the distribution, describing the transaction and identifying the stock distributed.
For high-value or complex separations, corporate counsel often request a Private Letter Ruling from the IRS before closing. A PLR is a written determination that the proposed transaction qualifies under Section 355. It eliminates the risk of a post-closing IRS challenge and gives both the corporation and its shareholders certainty. The process adds months to the timeline and requires extensive factual submissions, but when the tax exposure runs to billions, the cost of the ruling is a rounding error.
Agreements That Govern Life After the Split
The Separation Agreement is the master contract, but several specialized agreements typically sit alongside it to govern the ongoing relationship between the two entities.
Tax Matters Agreement
A Tax Matters Agreement allocates responsibility for pre-split tax liabilities, ongoing tax return preparation, management of IRS audits, and the consequences if either company takes an action that jeopardizes the separation’s tax-free status. It spells out who pays if a pre-separation tax year is audited and additional liability surfaces, and it typically includes indemnification provisions requiring one party to make the other whole for a tax loss it caused. Because a single misstep by either entity can retroactively undo Section 355 treatment for the entire transaction, these indemnification clauses carry real teeth.
Transitional Service Agreements
No newly separated company has every operational system in place on day one. Transitional Service Agreements are short-term contracts under which the former parent provides IT, payroll, accounting, and HR services to the new entity while it builds its own capabilities. These agreements typically run 6 to 24 months and are priced on a cost-plus basis with a modest single-digit markup. The limited duration matters. Indefinite shared services would undermine the premise that the companies are truly independent, which could raise questions under Section 355’s active trade or business and continuity requirements. Pricing must reflect arm’s-length terms to withstand both tax and regulatory scrutiny.
Cross-Indemnification
Beyond taxes, the two entities generally agree to indemnify each other for liabilities arising from their respective pre-split operations. If a product liability lawsuit tied to the parent’s legacy business surfaces three years after the split, the indemnification agreement determines which entity bears the cost. These provisions are negotiated in detail because the allocation of unknown future liabilities is one of the hardest parts of any corporate separation.