Two acquisitions can carry the identical $10 million price tag and leave the parties in wildly different after-tax positions — because the structure, not the sticker, decides how much of that price the IRS keeps. Deal structure determines whether the seller pays one layer of tax or two, whether the buyer gets a depreciable stepped-up basis or inherits the seller's old basis, and whether gain is recognized now or deferred for years. In many transactions, the tax delta between a well-structured and a poorly-structured deal exceeds the entire difference the parties spent months negotiating on headline price.
There are three broad paths: a taxable asset acquisition, a taxable stock acquisition, and a tax-free reorganization under IRC Section 368. Each shifts value between buyer and seller through basis, tax rate, and timing. The buyer wants basis it can write off and liabilities it can avoid; the seller wants a single layer of tax at capital-gain rates and, sometimes, deferral. Understanding where those interests collide — and where an election or a stock swap can reconcile them — is the heart of acquisition tax structuring.
The three structures, and who each one favors
Every acquisition ultimately resolves into one of three tax structures. The choice governs the seller's tax bill today, the buyer's write-offs tomorrow, and which liabilities travel with the deal.
| Structure | Seller's tax | Buyer's basis |
|---|---|---|
| Taxable asset acquisition | Gain recognized now; double tax for C-corps | Stepped-up to purchase price — depreciable/amortizable |
| Taxable stock acquisition | One layer of capital gain on the shares | Carryover — buyer steps into old inside basis |
| Tax-free reorganization (Sec. 368) | Deferred; boot is taxed immediately | Carryover basis in the acquired assets/stock |
The pattern is consistent: whenever the seller gets a better tax result (deferral, single layer), the buyer usually gives up basis, and vice versa. Structuring is the negotiation over who captures the tax benefit — and it is almost always priced into the deal, whether the parties name it or not.
The C-corporation double-tax problem
The single biggest structural driver is entity type. When a C-corporation sells its assets, the corporation pays tax on the gain, and then shareholders pay tax again when the after-tax proceeds are distributed in liquidation. That second layer is why C-corp sellers resist asset deals so strongly.
C-corporation asset sale
- Corporate-level tax on the full gain first
- Second tax when proceeds are distributed to shareholders
- Effective combined rate can approach the mid-40s%
- Buyer gets the stepped-up basis it wants
- Seller nets far less than the headline price
Pass-through (S-corp / partnership) asset sale
- Gain flows through to owners — taxed once
- No separate entity-level tax layer to distribute past
- Owners taxed at their individual capital-gain / ordinary mix
- Buyer still gets a stepped-up, depreciable basis
- Structure is far friendlier to an asset deal
This is why so many closely held acquisitions hinge on whether the target is a C-corp or a pass-through. A pass-through can often accept the buyer's preferred asset structure without ruinous double taxation. A C-corp typically cannot — pushing the deal toward a stock sale or a special election.
Taxable vs. tax-free: it's really "tax now" vs. "tax later"
A tax-free reorganization does not make tax disappear — it defers it. Under Section 368, if the seller's shareholders receive mostly acquirer stock (satisfying the "continuity of interest" and other requirements), they recognize no gain on the exchange and carry their old basis into the new shares. Gain is postponed until they sell that stock.
Any consideration in a reorganization that is not acquirer stock — cash, notes, or other property, collectively called "boot" — is generally taxable to the seller's shareholders in the year of the transaction, up to the amount of their gain. A deal marketed as "tax-free" is only tax-deferred to the extent the shareholders take stock. The more cash the seller pulls out at closing, the more current tax they trigger. Mixed cash-and-stock deals must model the boot carefully before anyone signs.
Deferral is valuable to a seller who believes in the acquirer's stock and doesn't need liquidity today. It's worthless to a seller who wants to cash out and diversify — that seller would rather take a taxable deal, pay the capital-gain tax now, and walk away clean. The right answer depends on the seller's liquidity needs and their view of the buyer's equity, not on a blanket preference for "tax-free."
The Section 338(h)(10) bridge
When a buyer wants asset-sale tax treatment (stepped-up basis) but the parties are transacting in stock — common when the target is an S-corp or a corporate subsidiary — the Section 338(h)(10) election lets them treat a stock purchase as if it were an asset sale for tax purposes.
Confirm eligibility
The target must generally be an S-corporation or a corporate subsidiary in a consolidated group, and the buyer must be a corporation acquiring a qualifying stock percentage.
Make the joint election
Buyer and seller elect jointly — one side can't do it alone — filing Form 8023 to treat the stock sale as a deemed asset sale.
Reallocate the tax result
The seller is taxed as if it sold assets; the buyer takes a stepped-up basis in those deemed-acquired assets, unlocking future depreciation and amortization.
Price the tax delta
The election can raise or lower the seller's tax versus a plain stock sale. The party that benefits typically compensates the other so the after-tax economics stay fair.
The election is powerful precisely because it decouples the legal form (a clean stock transfer, which avoids retitling assets and reassigning contracts) from the tax form (asset treatment, which delivers basis step-up). But it only works when both sides sign, and it changes the seller's tax — so it must be modeled and priced, never assumed.
Where structure quietly moves millions
Beyond the headline choice, several structural details silently reallocate value. Purchase-price allocation, net operating losses, and the treatment of intangibles each carry tax consequences that rarely make it into the term sheet but always make it into the tax return.
- Purchase-price allocation across asset classes — allocations to depreciable equipment and amortizable intangibles help the buyer; allocations to goodwill and going-concern value are amortized over 15 years
- Net operating loss carryforwards — a stock deal may preserve the target's NOLs, but Section 382 limits how fast the buyer can use them after an ownership change
- Section 197 intangibles — acquired goodwill and most intangibles amortize over 15 years in an asset deal, a benefit the buyer loses in a carryover-basis stock deal
- Working-capital and earnout structure — how contingent payments are characterized affects both timing and the ordinary-vs-capital rate applied to them
- State-level exposure — an asset deal can leave certain successor liabilities and nexus history behind that a stock deal carries forward
Structure the tax analysis before the letter of intent is signed, not after. Once an LOI commits to "a stock purchase for $X," reopening the structure to capture a basis step-up or avoid a double tax becomes a renegotiation — with far less leverage. The cheapest time to optimize the tax is while the price is still being set, because any tax cost can simply be built into that price.
Deal structure, not deal price, usually decides the after-tax outcome. Map it in this order: identify the target's entity type (a C-corp's double-tax exposure changes everything), decide between a taxable deal and a Section 368 reorganization based on the seller's liquidity needs and appetite for the buyer's stock, and where a buyer wants basis in a stock deal, evaluate a Section 338(h)(10) election and price the resulting tax delta into the terms. Run this analysis before the LOI locks the structure — that is the moment the tax bill is actually set.
Structure the deal before you sign the LOI
The asset-vs-stock and taxable-vs-reorganization tradeoffs affect both sides of a deal differently. Talk to our team before you sign the LOI, so the structure you agree to is the one that keeps the most value after tax.
Talk to a tax proSources
- IRS — Publication 542, Corporations
- IRC Section 368 — Definitions Relating to Corporate Reorganizations
- IRC Sections 331 and 336 — Corporate Liquidations and Gain or Loss on Distributions
- IRS — Form 8023 and Instructions, Elections Under Section 338 for Corporations Making Qualified Stock Purchases
- IRC Section 382 — Limitation on Net Operating Loss Carryforwards After Ownership Change
- IRC Section 197 — Amortization of Goodwill and Certain Other Intangibles
Frequently asked questions
In a taxable acquisition, the seller recognizes gain immediately and pays tax now; the buyer usually gets a cost basis in what it acquired. In a tax-free reorganization under IRC Section 368, the seller receives mostly acquirer stock and defers gain until those shares are sold — but the buyer inherits the seller's old (carryover) basis instead of a stepped-up one. Neither is universally better; it depends on whether cash or stock is changing hands and which party values basis more.
A buyer generally prefers an asset deal because it gets a stepped-up, depreciable/amortizable basis and can leave unknown liabilities behind. A seller usually prefers a stock deal because it's taxed once at capital-gain rates rather than facing the double tax that hits a C-corporation asset sale. That structural tension is the core of most M&A tax negotiation.
No — "tax-free" really means "tax-deferred." The seller postpones gain by taking acquirer stock and carrying over its old basis into those shares. When the shareholder eventually sells the stock, the deferred gain is recognized. Any cash or non-stock consideration ("boot") received in the deal is taxable in the year of the transaction.
Entity type is decisive. A C-corporation asset sale is taxed twice — once at the corporate level on the gain, again when proceeds are distributed to shareholders. S-corporations and partnerships are generally pass-through, so an asset sale is taxed once at the owner level. That single difference frequently determines whether a deal is structured as an asset sale, a stock sale, or an election like Section 338(h)(10).
