Under US GAAP, goodwill impairment is governed by ASC 350, issued by the Financial Accounting Standards Board. It requires companies to test goodwill for impairment at least once a year at the reporting unit level, and more often if a triggering event suggests the value may have declined. Companies may first perform a qualitative assessment before moving to a quantitative test. Any im... https://thealgebragroup.com/what-is-goodwill-impairment