Asset Sale vs Stock Sale: Tax, Liability, and Deal Structure

In an asset sale, the buyer chooses the assets and liabilities it takes, and it usually gets a tax basis step-up that it can depreciate and amortize. In a stock sale, the buyer takes the entity itself, with its contracts, permits, employees, and history, and the seller usually pays capital gains tax once on the shares. Buyers lean toward asset deals for liability control and the step-up, and sellers lean toward stock deals for a single layer of tax and a clean exit. Elections under Sections 338(h)(10) and 336(e), and the F reorganization used with S corporations, let a deal transfer stock or an entity legally while the tax law treats it as an asset purchase.

Asset deals are the minority in larger private transactions: they made up 21% of the 139 agreements in the American Bar Association's 2025 Private Target Deal Points Study, and the rest were stock purchases or mergers. The choice turns on three questions: who carries the target's history, which third parties must consent, and whether the step-up is worth more to the buyer than it costs the seller. The rules below describe the law as of September 2026; work with deal counsel and a tax adviser on the structure of any specific deal.

How do asset sales and stock sales compare?

The table sets the two structures side by side on the terms that matter after closing.

Which liabilities does the buyer take?

An asset buyer takes only the liabilities the agreement lists as assumed, and a stock buyer takes all of them. In an asset purchase, the assumed liabilities are typically trade payables and post-closing obligations under assigned contracts, and everything else stays with the seller as an excluded liability, including pre-closing taxes, litigation, and most employment claims. That protection has limits: state successor liability doctrines can reach a buyer that is a mere continuation of the seller or that bought in a transaction a court treats as a de facto merger, and some federal statutes, including environmental cleanup law, apply their own successor rules.

In a stock purchase, the entity keeps every liability it ever incurred, and the buyer protects itself through representations, an indemnity, an escrow, and often representations and warranties insurance. Tax history follows the shares, which is why tax due diligence runs broader in a stock deal: every return position, state nexus gap, and worker classification problem comes with the entity.

How are asset sales and stock sales taxed?

The buyer's result depends on basis. In an asset purchase, the buyer's basis in each asset equals the price allocated to it, so a buyer that pays $60 million for assets with a $12 million tax basis steps the basis up by $48 million. Goodwill, customer relationships, and most other acquired intangibles amortize over 15 years under Section 197. Equipment recovers faster: IRS Notice 2026-11 describes the permanent 100% first-year deduction that Public Law 119-21 created for qualified property acquired after January 19, 2025. In a stock purchase, the entity keeps its historical basis, so the buyer gets no step-up and inherits the target's tax attributes, including net operating losses that Section 382 limits after an ownership change.

The seller's result depends on the entity type. A C corporation that sells its assets pays the 21% corporate tax under Section 11(b), and its shareholders pay tax again when it distributes the proceeds, at up to 20% on long-term capital gain plus the 3.8% net investment income tax. In a stock sale, the shareholders pay only the second tax, and holders of qualified small business stock may exclude part or all of their gain under Section 1202; for stock acquired after July 4, 2025, the exclusion is 50% after three years, 75% after four, and 100% after five, on gain up to the greater of $15 million per issuer or 10 times the basis of the shares sold. S corporations and partnerships pass gain through to their owners, so an asset sale adds no corporate tax, but it can change the character of the gain: depreciation recapture under Section 1245 is ordinary income, and an S corporation still inside the five-year recognition period after converting from C status owes corporate-level tax on its built-in gain under Section 1374.

Section 338(h)(10) and Section 336(e) elections

A Section 338(h)(10) election treats a stock purchase as an asset purchase for tax. The buyer must be a corporation making a qualified stock purchase, meaning it buys stock that meets the 80% vote and value test of Section 1504(a)(2) within a 12-month acquisition period, and under Treasury Regulation 1.338(h)(10)-1 it must buy from a selling consolidated group, a selling affiliate, or the shareholders of an S corporation. The buyer and sellers make the election jointly on Form 8023, and S corporation shareholders who do not sell must consent. The old target is treated as selling its assets and liquidating, the sellers recognize no gain on the stock itself, and the buyer takes a stepped-up basis. The election fits two common deals: an S corporation sold to a corporate buyer, and a subsidiary sold out of a consolidated group, where the cost depends on how the parent's basis in the subsidiary's stock compares with the subsidiary's basis in its assets.

A Section 336(e) election reaches the same deemed asset sale without a corporate buyer. Under Treasury Regulation 1.336-1, the purchaser can be one or more persons, including a private equity fund organized as a partnership, as long as the seller, which must be a domestic corporation or the shareholders of an S corporation, disposes of at least 80% of the target's stock to unrelated persons within a 12-month disposition period. Under Treasury Regulation 1.336-2, the seller and target make the election by written, binding agreement and attach a statement to their returns, and for an S corporation target, every shareholder must sign, including those who keep their stock. Both elections depend on a valid S election when the target is an S corporation: if the election was never valid or has terminated, the step-up the buyer paid for can disappear.

The F reorganization for S corporations

The pre-closing F reorganization gives the buyer of an S corporation the same step-up while protecting it from a defective S election. The shareholders form a new holding company, contribute the target's stock to it, and elect to treat the target as a qualified subchapter S subsidiary. Revenue Ruling 2008-18 holds that this sequence qualifies as a reorganization under Section 368(a)(1)(F), that the S election continues for the new holding company, and that the holding company needs a new employer identification number while the target keeps its own. The target then converts to a limited liability company that is disregarded for tax, and the buyer's purchase of the LLC interests is treated as a purchase of assets. Torys' April 2026 analysis notes that the buyer receives a step-up equal to the fair market value of the assets whether or not the original S election was valid, and that the steps run on a strict pre-closing timetable. The operating company remains the same legal entity, so its contracts and permits usually stay in place, though some contracts treat the conversion or the new owner as an assignment or change of control.

Section 1060 allocation and Form 8594

An asset purchase of a trade or business allocates the price under Section 1060 by the residual method. The price fills seven classes in order, each up to the fair market value of its assets: Class I cash and deposit accounts, Class II actively traded property such as securities, Class III receivables and other mark-to-market assets, Class IV inventory, Class V equipment, buildings, and land, Class VI Section 197 intangibles other than goodwill, and Class VII goodwill and going concern value. Both parties report the allocation on Form 8594 with their returns for the year of the sale, and a written allocation agreement binds both of them. The allocation sets the character of the seller's gain and the speed of the buyer's deductions, so the parties negotiate it in the agreement. The book allocation under ASC 805 is a separate exercise, covered in our guide to purchase price allocation.

What do the asset purchase agreement and stock purchase agreement contain?

Both agreements share a skeleton of price mechanics, representations, covenants, closing conditions, and indemnification. They differ in what the buyer receives and how it takes title.

Two schedules carry most of the negotiation in an asset deal: the assumed liabilities and the contracts the seller will assign. In a stock deal, the disclosure schedules against the representations carry that weight, because they record what the buyer knew before signing. BD Emerson's diligence findings feed those schedules, while deal counsel drafts the agreement itself.

How does the structure change diligence scope?

An asset deal moves diligence toward everything that must transfer. The team builds a consent inventory of contracts with anti-assignment clauses, ranked by revenue at risk, and a map of which licenses and permits transfer, which must be reissued, and how long each agency takes. IT diligence covers software licenses that cannot move without vendor consent, cloud tenants, domains, and the data that must be separated from systems the seller keeps. Employee transfers need offers, benefit plans, and WARN Act planning: under 29 U.S.C. 2101(b)(1), the seller gives notice of plant closings and mass layoffs up to the effective date of the sale, the buyer after it, and the seller's employees on that date are treated as the buyer's employees immediately afterward.

When the target is a division of a larger seller, the buyer usually needs a transition services agreement for payroll, IT, and finance until its own systems take over. Our carve-out advisory team scopes those services and the stranded costs before signing. A stock deal moves diligence back toward history: tax exposure, litigation, compliance, security incidents, and contracts with change-of-control clauses. Regulated licenses still need attention in a stock sale. 47 U.S.C. 310(d) bars the transfer of an FCC license "by transfer of control of any corporation holding such permit or license" without Commission approval, so buying the shares does not avoid that consent.

How does BD Emerson decide between an asset and a stock structure?

BD Emerson applies three tests in order. First, price the step-up: pursue an asset-equivalent tax result when the present value of the buyer's added deductions exceeds the seller's added tax, including any gross-up. Second, take a legal transfer of assets only when liability protection or a partial purchase justifies the consent work, because an election or an F reorganization delivers the tax result while leaving contracts in place. Third, when contracts, licenses, or permits that carry the revenue cannot move before closing, keep the entity through a stock purchase, a merger, or an F reorganization.

A worked example shows the first test. A buyer pays $60 million, cash-free and debt-free, for a business whose assets have a $12 million tax basis, and the full $48 million step-up is goodwill and other Section 197 intangibles. Amortized over 15 years, the step-up produces $3.2 million of deductions a year, worth $672,000 a year to a corporate buyer at the 21% rate. Discounted at 10% over 15 years, an annuity factor of 7.606, that stream is worth about $5.11 million today, or 8.5% of the price.

For the S corporation, asset treatment only changes the character of $4 million of depreciation recapture, so the added tax is $680,000, and because the gross-up is itself taxed as capital gain, holding the seller even takes $680,000 divided by 0.80, or about $850,000. The buyer keeps roughly $4.26 million of value. For the C corporation, assume the shareholders' stock basis is also $12 million. A stock sale leaves them $48.58 million after a 23.8% tax on their $48 million gain. An asset sale first costs the corporation $10.08 million, and the shareholders then pay 23.8% on a $37.92 million liquidation gain, leaving $40.90 million. The $7.68 million gap exceeds the $5.11 million the step-up is worth, so no price increase compensates the sellers and leaves the buyer ahead. The figures use federal rates only and assume no net operating losses; losses that absorb the corporate gain, or a corporate parent selling a subsidiary, can change the C corporation answer.

Where do mergers fit?

A merger is the third structure, and it is the usual route when a target has too many shareholders for each of them to sign a stock purchase agreement. Under Section 251 of the Delaware General Corporation Law, a merger generally needs board approval and a majority of the outstanding stock entitled to vote, and it then binds every holder, subject to appraisal rights for dissenters. In a reverse triangular merger, the buyer's new subsidiary merges into the target, which survives as the buyer's subsidiary with its contracts and permits in place. The Delaware Court of Chancery held in Meso Scale Diagnostics v. Roche Diagnostics in 2013 that a reverse triangular merger did not assign the surviving company's contracts by operation of law. In a forward merger, the target merges into the buyer or its subsidiary and disappears, so its contracts pass by operation of law, which some anti-assignment clauses expressly cover. For tax, a cash reverse triangular merger is generally treated as a stock purchase and a cash forward merger as an asset purchase, and a merger paid mostly in buyer stock can qualify as a tax-free reorganization under Section 368. Our guide to types of mergers covers these structures.

Frequently asked questions

What is the difference between an asset sale and a stock sale? In an asset sale, the buyer purchases selected assets and assumes only the liabilities the agreement lists, and it usually gets a stepped-up tax basis. In a stock sale, the buyer purchases the shares and takes the entity with all its contracts, permits, and liabilities, and the seller usually pays capital gains tax once. Elections such as 338(h)(10) combine a stock transfer with asset tax treatment.

Why do buyers prefer asset purchases? Buyers prefer asset purchases because they choose which liabilities to assume and receive a stepped-up tax basis. The step-up turns much of the price into depreciation and 15-year amortization deductions under Section 197, and excluded liabilities stay with the seller. The costs are third-party consents for contracts and permits, employee transfers, and a seller that may ask for a higher price to cover its added tax.

Why do sellers prefer stock sales? Sellers prefer stock sales because the gain is usually taxed once, as long-term capital gain on the shares, and the buyer takes the company's liabilities with it. A C corporation that sells assets pays corporate tax on the gain, and its shareholders pay tax again on the distribution. Holders of qualified small business stock may also exclude some or all of their gain under Section 1202.

When does a 338(h)(10) election make sense? A Section 338(h)(10) election fits when a corporate buyer acquires at least 80% of a target's stock from a consolidated group, a selling affiliate, or S corporation shareholders, and the step-up is worth more than the seller's added tax. The parties elect jointly on Form 8023. Buyers that are not corporations use a Section 336(e) election or an F reorganization instead.

What is the difference between an asset purchase agreement and a stock purchase agreement? An asset purchase agreement lists the assets bought, the liabilities assumed, and the excluded items that stay with the seller, and it closes with a bill of sale, assignment agreements, and third-party consents. A stock purchase agreement transfers all of the target's shares, so its representations, disclosure schedules, and indemnity carry the protection, and it closes with stock powers, resignations, and payoff letters.

Is a merger an asset sale or a stock sale? A merger is a third structure that combines entities under a state statute and binds every shareholder once the board and the required vote approve it. For tax, a cash reverse triangular merger is generally treated as a stock purchase and a cash forward merger as an asset purchase. A merger paid mostly in buyer stock can qualify as a tax-free reorganization under Section 368.

If you are weighing structures for a pending deal, our M&A tax due diligence team can model the step-up, the seller's added tax, and the exposures each structure leaves with the buyer, so the structure negotiation starts from numbers.