When a buyer and seller agree in principle that a transaction should happen, one of the first and most consequential legal and tax decisions they face is how to structure it. Deal structure is not merely a technical matter for lawyers and accountants. It directly affects how much money the seller keeps after taxes, what liabilities the buyer inherits, whether third-party consents are required, and what the purchase price must be to make the deal work for both sides. Business owners who understand the basic landscape of deal structures are far better equipped to negotiate intelligently and to avoid being disadvantaged by a buyer who is more sophisticated about the implications of these choices.
The Three Basic Structures: Asset Purchase, Stock Purchase, and Merger
In an asset purchase, the buyer acquires specific assets of the selling company rather than acquiring the company itself. The seller’s corporate entity remains intact, and the buyer gets a defined set of assets — equipment, inventory, intellectual property, customer contracts, goodwill, and other specified items — along with whatever liabilities the parties agree to include. The buyer does not automatically inherit liabilities that are not expressly assumed in the asset purchase agreement. This is the key structural advantage of an asset deal for buyers: they can leave behind unknown or contingent liabilities, including tax liabilities, environmental liabilities, litigation exposure, and pension obligations.
In a stock purchase, the buyer acquires the equity interests (shares of stock or LLC membership interests) of the selling company directly from its owners. The company itself changes hands; the legal entity continues in existence but now has a new owner. Because the legal entity is unchanged, the buyer inherits all of its liabilities — both known and unknown. A buyer who purchases stock is stepping into the shoes of the prior owners for every obligation the company has ever incurred, even if those obligations are not disclosed or discovered during due diligence. This is why buyers generally prefer asset deals and sellers often prefer stock deals.
A statutory merger is a transaction structure in which two entities combine under state corporate law, with one entity surviving and the other ceasing to exist by operation of law. The assets and liabilities of the non-surviving entity transfer automatically to the surviving entity. Mergers can be structured as direct mergers (the seller merges directly into the buyer or vice versa), forward triangular mergers (the seller merges into a subsidiary of the buyer), or reverse triangular mergers (a subsidiary of the buyer merges into the seller, with the seller surviving as a subsidiary of the buyer). Mergers are commonly used in deals involving public companies and in situations where the transfer of specific assets or contracts would be cumbersome or require widespread consents.
Tax Consequences for Sellers: The Central Tension
For most sellers, the dominant tax concern in an M&A transaction is the difference between capital gains treatment and ordinary income treatment. When a seller sells stock that has been held for more than one year, the gain is typically taxed at the long-term capital gains rate, which is currently lower than the ordinary income rate applicable to individuals. When a seller sells assets, the tax character of the gain depends on the nature of each asset: tangible assets like equipment may give rise to depreciation recapture taxed at ordinary rates, while intangible assets like customer relationships and goodwill typically produce capital gain. The aggregate tax cost of an asset sale is therefore generally higher for a seller than a stock sale, which is why sellers almost universally prefer stock deals from a tax perspective.
For sellers who are S corporations, partnerships, or LLCs taxed as pass-throughs, the comparison is slightly more nuanced because the entity-level gain flows through directly to the owners. For C corporation sellers, a straight asset sale creates two levels of tax: the corporation pays corporate income tax on the gain from the asset sale, and the shareholders then pay capital gains tax when the after-tax proceeds are distributed as a dividend or liquidating distribution. This double tax is a powerful argument for sellers who want stock deal treatment.
Tax Consequences for Buyers: The Step-Up Advantage
From the buyer’s perspective, the most important tax consideration is the tax basis it will have in the assets it acquires. In an asset purchase, the buyer receives a stepped-up tax basis in the acquired assets equal to the purchase price allocated among them. This means the buyer can depreciate or amortize the full purchase price over time, generating tax deductions that offset future income. Section 197 of the Internal Revenue Code allows buyers to amortize most acquired intangibles, including goodwill and customer lists, over a 15-year period on a straight-line basis. The ability to amortize a significant portion of the purchase price is a substantial economic benefit to the buyer, and it is one reason buyers prefer asset deals.
In a stock purchase, the buyer takes the target company’s existing tax basis in its assets, which may be far lower than the purchase price. The buyer gets no step-up in the value of the underlying assets simply by virtue of buying the stock. This means less depreciation and amortization, and therefore less tax shelter in the years following the acquisition. The difference in after-tax economics between a step-up and a no-step-up scenario can be worth a meaningful percentage of the purchase price over the relevant depreciation and amortization periods.
Section 338(h)(10) and Section 336(e) Elections: Bridging the Gap
The tax conflict between sellers who prefer stock deals and buyers who prefer asset deals has a partial legislative solution in the form of Sections 338(h)(10) and 336(e) of the Internal Revenue Code. These provisions allow the parties to structure a transaction legally as a stock purchase while treating it for federal income tax purposes as if the seller had sold the underlying assets. The buyer gets the step-up it wants; the seller gets simplified transfer logistics and, in some cases, a reduced overall tax cost because the entity-level gain is taxed only once.
A Section 338(h)(10) election is available when the buyer is a corporation and the target is either an S corporation or a member of a consolidated group of corporations. Both the buyer and the seller must jointly make the election by filing Form 8023 with the IRS. The effect is a deemed liquidation of the target: the target is treated as if it sold all of its assets at fair market value and then distributed the proceeds to its shareholders. For S corporation sellers, this usually means a single level of tax at the shareholder level, which can be more favorable than an outright asset sale. For consolidated group targets, the election allows the gain to be reported within the group’s tax return structure.
A Section 336(e) election is a broader provision that was enacted to extend similar treatment to situations not covered by Section 338(h)(10). Under Section 336(e), a domestic corporation can make a deemed asset sale election when it disposes of stock of a domestic subsidiary in a qualified stock disposition, which includes sales to non-corporate buyers (such as private equity funds) and sales that do not qualify for a Section 338(h)(10) election for other reasons. Unlike Section 338(h)(10), the Section 336(e) election is made unilaterally by the seller, without the buyer’s participation, though its effect on the buyer’s tax position depends on the specific circumstances.
The negotiation over whether to make a Section 338(h)(10) or 336(e) election is fundamentally a tax economics negotiation. The buyer benefits from the step-up; the seller incurs additional tax compared to a pure stock sale. The common resolution is that the buyer pays a price premium — sometimes called a gross-up — to compensate the seller for the incremental tax cost of agreeing to the election. Calculating that gross-up accurately requires detailed tax modeling, and sellers should engage tax counsel to ensure they are not underestimating their incremental cost.
Forward and Reverse Triangular Mergers
Triangular mergers are a structural approach commonly used in both taxable and tax-free transactions. They involve a subsidiary (a merger sub) created by the buyer specifically for the transaction, which is then merged with or into the target company.
In a forward triangular merger, the target company merges into the buyer’s newly formed subsidiary, with the subsidiary surviving. The target’s assets and liabilities transfer automatically to the subsidiary by operation of law. The sellers receive consideration — cash, stock in the buyer’s parent, or a combination — in exchange for their target company shares. A forward triangular merger can qualify as a tax-free reorganization under Section 368(a)(2)(D) if at least 80 percent of the consideration paid to target shareholders consists of stock in the buyer’s controlling parent corporation and certain other requirements are met. From the buyer’s perspective, the primary advantage is that the target’s liabilities are isolated in a subsidiary rather than flowing directly onto the buyer’s balance sheet.
In a reverse triangular merger, the buyer’s newly formed subsidiary merges into the target company, with the target surviving as a subsidiary of the buyer. The sellers exchange their target company shares for consideration from the buyer. The reverse triangular merger is frequently preferred when the target holds licenses, contracts, or regulatory approvals that cannot be transferred or assigned without consent. Because the target entity survives, those agreements remain in place without triggering assignment or change of control provisions — at least as a technical legal matter, though sophisticated contract counterparties are increasingly drafting change of control provisions that capture reverse triangular mergers as well. A reverse triangular merger can qualify as a tax-free reorganization under Section 368(a)(2)(E) if at least 80 percent of the target’s stock is acquired solely for voting stock of the buyer’s controlling parent.
How Structure Affects Price
Deal structure and purchase price are inextricably linked. Because an asset deal imposes additional tax costs on the seller, sellers will typically demand a higher headline price in an asset deal than in a stock deal to achieve the same after-tax proceeds. Conversely, buyers who receive the benefit of a stepped-up tax basis in an asset deal may be willing to pay more, because the present value of the future tax deductions generated by depreciation and amortization offsets a portion of the premium. The negotiation over price should therefore always be conducted with an understanding of the net after-tax economics on both sides.
When a Section 338(h)(10) or 336(e) election is being considered, the purchase price negotiation includes an explicit discussion of the gross-up. The parties typically agree on a formula under which the buyer pays additional consideration equal to the seller’s incremental tax cost from the deemed asset sale treatment, sometimes shared between the parties based on a negotiated split of the buyer’s step-up benefit.
Liability Allocation and Indemnification
One of the most important practical differences between asset deals and stock deals is the default allocation of liabilities. In an asset deal, the buyer assumes only those liabilities explicitly set out in the asset purchase agreement. Everything else remains with the seller’s corporate entity. This clean liability profile is a central reason buyers prefer asset deals, particularly in transactions involving environmental risk, product liability exposure, employment litigation, or unknown tax liabilities.
Despite this general rule, buyers in asset deals are not immune from all successor liability risks. Courts in many states have recognized doctrines — including the mere continuation doctrine, the de facto merger doctrine, and product line liability — under which a buyer who continues a seller’s business operations can be held liable for certain pre-closing obligations even in an asset deal. These doctrines are particularly active in product liability and employment law contexts. Buyers should not assume that an asset purchase structure categorically eliminates all inherited liability risk.
In a stock deal, the buyer’s exposure to inherited liabilities is inherent in the structure. The primary protection available to the buyer is the seller’s representations and warranties in the purchase agreement, backed by an indemnification obligation. The seller represents that the company’s financial statements are accurate, that there are no undisclosed liabilities, that the company is in compliance with applicable law, and that specific risk areas have been disclosed. If those representations prove false, the seller has an obligation to indemnify the buyer for resulting losses. The scope, caps, baskets, and survival periods applicable to those indemnification obligations are among the most heavily negotiated provisions in any stock purchase agreement.
Consent Requirements
A critical practical consideration in deal structure is the consent requirements triggered by different structures. In an asset deal, transferring specific contracts, licenses, permits, and leases from the seller to the buyer typically requires the counterparty’s consent. If the seller has hundreds of customer agreements, supplier contracts, and government licenses, obtaining all of those consents before closing can be a massive logistical undertaking that adds time and uncertainty to the deal. Counterparties who learn of the pending transaction may use the consent solicitation process as an opportunity to renegotiate unfavorable terms or to extract concessions.
In a stock deal or reverse triangular merger, because the target entity survives with its contracts and licenses in place, consent requirements are triggered only by explicit change of control provisions in those contracts and applicable licenses. Many standard commercial contracts lack change of control provisions, which means a stock deal can often be consummated without widespread third-party consent. Sellers with significant contract portfolios often have a strong structural preference for stock deals or reverse triangular mergers for this reason.
The choice between asset deal, stock deal, and merger is one of the most important decisions in any M&A transaction. It is not a binary choice to be made in the abstract; it is a negotiation that must account for the specific facts of the business, the tax positions of both parties, the nature of the company’s assets and contracts, and the relative bargaining power of the buyer and seller. Business owners who understand the terrain of this negotiation are far better positioned to achieve a structure that serves their interests.