In a stock sale, the buyer acquires equity from the target company's shareholders. Gains from the sale, exchange or other disposition of any kind of property are taxable under the Pennsylvania personal income tax (PA PIT) law.There are two primary ways to structure the taxable purchase and sale of an incorporated business. The parties may engage in an asset acquisition. All things being equal, buyers prefer an asset sale while sellers prefer a stock sale. One major difference between a stock sale and asset sale is that the buyer typically does not acquire the existing liabilities of the selling company. While an asset sale outshines a stock sale in company structure support, it loses a fair amount of points when it comes to tax implications. There are two basic ways to sell a business: a stock deal or an asset deal.