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Same business, same price — but the structure decides who keeps the skeletons in the closet.

One of the first and most consequential decisions in buying or selling a business is how to structure the deal: as an asset purchase or a stock purchase. It sounds technical, but it determines which liabilities transfer, how the transaction is taxed, and how much post-closing risk each side carries. Buyers and sellers often prefer opposite structures for exactly these reasons, which is why it becomes a point of negotiation. This guide explains the difference and the trade-offs so you can approach that negotiation informed.

We help businesses get this right from the start. This is general information, not advice on a specific situation.

The structure decides who keeps the skeletons in the closet.

What an asset purchase is

In an asset purchase, the buyer acquires specific assets of the business — equipment, inventory, intellectual property, customer relationships — and typically assumes only the liabilities it expressly agrees to. Most other liabilities stay with the seller. Buyers often favor this structure because it limits inherited risk and can offer tax advantages, including a stepped-up basis in the acquired assets. The IRS addresses how buyers and sellers allocate the price across asset classes through irs.gov. The trade-off is complexity: each asset, contract, and license may need to be individually transferred.

Buyers usually prefer assets; sellers often prefer stock — and that tension is the negotiation.

What a stock purchase is

In a stock or equity purchase, the buyer acquires the ownership interests of the entity itself, and the business continues as the same legal entity — now under new ownership. Because the entity is unchanged, its assets, contracts, and liabilities generally come along automatically, including liabilities the buyer may not fully know about. Sellers often prefer this structure for its cleaner exit and typically more favorable tax treatment. The Legal Information Institute’s overview of law.cornell.edu situates both structures within the broader landscape of acquisitions.

Liability: the core difference

The central distinction is liability. An asset purchase lets a buyer largely choose which obligations to assume, leaving unknown or unwanted liabilities behind — subject to some exceptions the law imposes. A stock purchase transfers the entity whole, so its liabilities, known and unknown, travel with it. That is why buyers gravitate toward asset deals and sellers toward stock deals. Where the parties land is negotiated, and the purchase agreement’s representations, warranties, and indemnities are used to allocate the remaining risk either way.

Taxes and contract transfers

Tax treatment often differs sharply between the two structures and frequently drives the choice; the irs.gov resource outlines the considerations, and professional tax advice is essential. Contract transfer also differs: in a stock deal, contracts usually stay with the unchanged entity, while in an asset deal, many must be individually assigned and may require third-party consent. Neither structure is inherently better — the right one depends on the business, its liabilities, and both parties’ tax positions. That is exactly why the decision belongs early in the process, with legal and tax input.

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