Key takeaways
- Buyers prefer asset sales for tax step-up, sellers prefer stock sales for tax treatment.
- The purchase price premium a buyer offers for a stock sale often doesn't cover the tax gap.
- Section 338(h)(10) elections can bridge the structure gap in some deal contexts.
- Understand your tax basis before you engage a banker, not after you receive an LOI.
- Structure negotiations happen faster when the seller understands both sides of the equation.
~7–15% after-tax gap
Asset vs. stock on same price
C-corp seller premium
Stock sale preferred
IRC 338(h)(10)
Hybrid election path
Deal-killer risk
Undisclosed liabilities in stock
7–15% is the typical after-tax proceeds gap between an asset sale and a stock sale at the same headline purchase price, representing $700K–$3M+ in additional after-tax founder income on a $10–25M transaction (Deloitte M&A Tax Practice 2024). The gap is driven by depreciation recapture taxed at ordinary income rates in asset deals versus capital gains treatment in stock sales.
In 68% of middle market transactions where a buyer proposed an asset deal structure, the seller's tax advisor was not involved in the LOI stage negotiations, meaning the structure was effectively accepted before the tax cost was modeled (SRS Acquiom 2024). By the time the purchase agreement is being drafted, the buyer's position has calcified.
A 338(h)(10) election, available to S-corp sellers, allows the transaction to be executed as a stock sale for legal purposes but treated as an asset sale for tax purposes, with the buyer receiving the step-up in basis they want. Buyers often gross up the price to compensate the seller for the incremental tax cost, making this the most common negotiated resolution in LMM transactions where buyer and seller preferences conflict.
The question of asset sale versus stock sale is not an accounting technicality. It is the deal term that most directly determines how much of the purchase price the seller actually retains. For founder-owned and family-owned middle market businesses, the structural decision can shift after-tax proceeds by seven figures on a typical transaction, without changing the headline price at all.
What each structure means
In an asset sale, the buyer purchases specific assets of the business, equipment, contracts, intellectual property, customer lists, goodwill, and assumes only specified liabilities. The seller retains the legal entity and distributes the proceeds. In a stock sale, the buyer acquires the ownership interests (shares) of the entity directly. The entity, with all its assets, liabilities, and history, transfers to the buyer in full.
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Why buyers prefer asset sales
Buyers prefer asset sales for two reasons. First, they receive a stepped-up basis in the acquired assets, which allows them to depreciate or amortize the purchase price over the asset's useful life. That tax benefit can be worth millions of dollars in present value over the depreciation period. Second, they do not inherit the seller's historical liabilities. In a stock sale, the buyer acquires the entity with all its history, including environmental exposures, pending litigation, employment claims, and tax positions the seller may not fully know about.
A buyer's preference for an asset sale is not just about tax. It is about liability insulation. When a buyer acquires the stock of a company, they step into the seller's shoes entirely, including disputes that have not yet surfaced. Reps and warranties insurance can mitigate this, but it does not eliminate it. This is why most strategic acquirers and many PE platforms default to asset deal structures in the lower middle market.
Why sellers prefer stock sales
Sellers prefer stock sales because the proceeds are taxed as capital gains rather than as a mix of ordinary income and capital gains. For most middle market founders, the federal long-term capital gains rate (currently 20% at the top bracket, plus 3.8% net investment income tax) is materially lower than the ordinary income rate that applies to depreciation recapture and certain asset categories in an asset sale.
The actual difference depends on the asset composition, how much depreciation recapture is embedded, how much goodwill and intangibles exist, and the seller's overall tax situation. But the direction is consistent: stock sales are almost always more tax-efficient for the seller at the same purchase price.
IRC 338(h)(10): the hybrid election
For S-corporation sellers, there is a third path: the Section 338(h)(10) election. This structure allows the transaction to be treated as an asset sale for tax purposes while being executed as a stock sale for legal purposes. The buyer gets the stepped-up basis they want. The seller avoids the administrative complexity of transferring individual assets and contracts.
The trade-off is tax treatment: the seller pays as if they sold assets, not stock. Whether that cost is acceptable depends on the asset composition of the business, the embedded recapture, and how much the buyer is willing to pay to get the tax benefit. In many middle market transactions, buyers will increase the purchase price to compensate the seller for the incremental tax cost of an asset deal or a 338(h)(10) election, effectively grossing up the price to make the seller whole after-tax.
How structure gets negotiated in practice
In most middle market processes, structure is not presented as a binary choice. It is negotiated through price and allocation. The buyer proposes an asset deal; the seller demands a premium to compensate for the tax difference; both parties model whether the deal still makes economic sense.
Transaction Structure Negotiation Sequence
Step 1: Identify default
Determine what structure the buyer is assuming in their letter of intent, most LOIs do not specify
Step 2: Model the gap
Estimate after-tax proceeds under asset sale vs. stock sale at the proposed price
Step 3: Propose the gross-up
If buyer wants asset sale, calculate the price increase needed to make seller whole after-tax
Step 4: Evaluate total economics
Assess whether the grossed-up price is within buyer's valuation range and deal thesis
Step 5: Negotiate allocation
If asset deal proceeds, negotiate the purchase price allocation across asset classes, it affects both seller's tax and buyer's depreciation schedule
A $14M HVAC services business received an LOI from a strategic acquirer at $9.8M, a number that felt strong relative to the seller's expectations. The LOI did not specify asset sale or stock sale, and the seller's advisors did not raise the question before signing. Thirty days into exclusivity, the buyer's counsel proposed an asset deal structure. The seller's CPA modeled the after-tax impact: under the asset deal, depreciation recapture on $2.3M of equipment at ordinary income rates reduced net proceeds by approximately $480K versus a stock sale at the same price. The buyer offered a $310K gross-up to compensate for part of the differential. Final realized proceeds after tax: $7.9M on a $10.11M grossed-up headline, versus a modeled $8.4M under a stock sale at the original $9.8M. The $500K gap was entirely a function of structure, not price.
Founders who do not understand the structure question are vulnerable to accepting an asset deal at a price that a stock deal would have provided net of tax. The right time to raise structure is before the LOI is signed, not during the purchase agreement negotiation when the buyer's position has calcified.
Frequently asked questions
What is the difference between an asset sale and a stock sale?
In an asset sale, the buyer acquires specific business assets and assumed liabilities only. In a stock sale, the buyer acquires the equity of the legal entity, including all assets, liabilities, and history. The structure affects tax treatment, liability exposure, and after-tax proceeds, without necessarily changing the headline purchase price.
Which structure is better for the seller?
Stock sales are generally more favorable for sellers because proceeds are taxed at capital gains rates rather than as ordinary income. Asset sales trigger ordinary income tax on depreciation recapture and certain asset classes. The gap in after-tax proceeds between the two structures can be seven figures on a typical middle market transaction.
What is a 338(h)(10) election?
A 338(h)(10) election allows an S-corporation stock sale to be treated as an asset sale for tax purposes. The buyer gets a stepped-up basis; the seller faces asset-sale tax treatment. Buyers often compensate sellers for the incremental tax cost through a higher purchase price. It requires both parties to jointly file and is irrevocable once made.
How does purchase price allocation work in an asset sale?
The total purchase price is allocated across asset classes (inventory, equipment, customer lists, goodwill, non-competes, etc.) according to IRS rules. The allocation affects how the seller is taxed (ordinary income on some classes, capital gains on others) and how the buyer depreciates and amortizes the acquired assets. This allocation is negotiated, it should not be accepted as a buyer default.
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Most useful when a buyer has expressed interest or a [letter of intent](/insights/letter-of-intent-ma-founder-guide) is being discussed.
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