Goodwill in accounting is an intangible asset that arises when a buyer acquires an existing business. Goodwill represents assets that are not separately identifiable. Goodwill does not include identifiable assets that are capable of being separated or divided from the entity and sold, transferred, licensed, rented, or exchanged, either individually or together with a related contract, identifiable asset, or liability regardless of whether the entity intends to do so. Goodwill also does not include contractual or other legal rights regardless of whether those are transferable or separable from the entity or other rights and obligations. Examples of identifiable assets that are not goodwill include a company’s brand name, customer relationships, artistic intangible assets, and any patents or proprietary technology. The goodwill amounts to the excess of the "purchase consideration" (the money paid to purchase the asset or business) over the total value of the assets and liabilities. It is classified as an intangible asset on the balance sheet, since it can neither be seen nor touched. Under US GAAP and IFRS, goodwill is never amortized. Instead, management is responsible for valuing goodwill every year and to determine if an impairment is required. If the fair market value goes below historical cost (what goodwill was purchased for), an impairment must be recorded to bring it down to its fair market value. However, an increase in the fair market value would not be accounted for in the financial statements. Private companies in the United States, however, may elect to amortize goodwill over a period of ten years or less under an accounting alternative from the Private Company Council of the FASB.
In order to calculate goodwill, the fair market value of identifiable assets and liabilities of the company acquired is deducted from the purchase price. For instance, if company A acquired 100% of company B, but paid more than the net market value of company B, a goodwill occurs. In order to calculate goodwill, it is necessary to have a list of all of company B's assets and liabilities at fair market value.
In order to acquire company B, company A paid $20. Hence, goodwill would be $11 ($20 - $9). The journal entry in the books of company A to record the acquisition of company B would be:
Goodwill is a special type of intangible asset that represents that portion of the entire business value that cannot be attributed to other income producing business assets, tangible or intangible.
For example, a privately held software company may have net assets (consisting primarily of miscellaneous equipment and/or property, and assuming no debt) valued at $1 million, but the company's overall value (including customers and intellectual capital) is valued at $10 million. Anybody buying that company would book $10 million in total assets acquired, comprising $1 million physical assets and $9 million in other intangible assets. And any consideration paid in excess of $10 million shall be considered as goodwill. In a private company, goodwill has no predetermined value prior to the acquisition; its magnitude depends on the two other variables by definition. A publicly traded company, by contrast, is subject to a constant process of market valuation, so goodwill will always be apparent.