Walk me through goodwill and how it gets created.

Goodwill is the accounting plug that gets created in an acquisition when the price paid exceeds the fair value of the identifiable net assets acquired. It's the premium for the things you can't put on a balance sheet — brand, customer relationships not separately identifiable, workforce, expected synergies.

The mechanics: when you acquire a target, you do purchase accounting. You revalue the target's assets and liabilities to fair market value at close — that's the "step-up." Tangible assets like PP&E may be marked up. Identifiable intangibles like customer contracts, trade names, technology, and non-compete agreements get put on the balance sheet at their appraised values, even if they weren't there before. Liabilities are also revalued.

Net identifiable assets at fair value equals the new asset side minus the liability side. The purchase price minus net identifiable assets at fair value equals goodwill. So if you buy a company for $1 billion and the fair value of net identifiable assets is $700 million, goodwill is $300 million.

Goodwill sits on the balance sheet as an intangible asset. Under GAAP, goodwill is not amortized — it's tested for impairment annually, or more often if there's a triggering event. If the carrying value of the reporting unit exceeds its fair value, you take an impairment charge that hits the income statement. That charge is non-cash but it's real for GAAP earnings — it's why you sometimes see massive write-downs years after a deal that didn't work.

Identifiable intangibles are different — most of them DO get amortized over their useful lives, which creates ongoing P&L drag and is why bankers show "cash EPS" excluding deal amortization in accretion / dilution.

Tax treatment matters too: in a stock deal, goodwill is typically not tax-deductible. In an asset deal, both goodwill and intangible step-ups are amortizable over 15 years for tax purposes — that's why buyers prefer asset deals.