How Purchase Accounting Changes Post-Deal EPS

When one company buys another, the acquirer doesn't just add the target's old balance sheet numbers to its own. Under purchase accounting, the acquirer must restate the target's identifiable assets and liabilities to their fair value as of the acquisition date, and any amount paid above that fair value gets recorded as goodwill. This single requirement can materially change what the combined company's earnings look like going forward, entirely separate from how the underlying businesses actually perform.

Where the new charges come from

Two things typically get revalued upward in an acquisition: tangible assets like property, plant and equipment, and — usually far larger — identifiable intangible assets such as customer relationships, brand names, and technology, which the target may never have carried on its own balance sheet at all. Both are then depreciated or amortized over their useful lives, creating new non-cash expense that didn't exist in either company's standalone financials before the deal. Whatever's left of the purchase price after all identifiable assets and liabilities are fairly valued becomes goodwill, which — unlike the identifiable intangibles — is not amortized under current US GAAP, but is tested annually for impairment.

Worked example

An acquirer pays $1 billion for a target whose net tangible assets have a fair value of $300 million. An appraisal identifies $400 million of newly recognized customer relationships and technology, amortized straight-line over 10 years.

1. New annual amortization: \400\text{m} / 10 = $40$ million a year in new non-cash expense that appears on the combined income statement, on top of whatever the target was already expensing.
2. Goodwill: the remainder of the price, \1{,}000\text{m} - $300\text{m} - $400\text{m} = $300$ million, is recorded as goodwill and is not amortized, though it sits on the balance sheet subject to future impairment testing.
3. EPS effect: the extra $40 million of annual amortization reduces pre-tax reported net income by that amount, pulling down reported EPS relative to what a simple combination of the two companies' pre-deal net incomes would have suggested — even though cash flow is unaffected, since amortization is a non-cash charge.

What this means in practice

Because the new intangible amortization is non-cash, most analysts and many bankers look past it and focus on adjusted or cash EPS, which adds the deal-related amortization back — a deal that looks dilutive on reported EPS in year one can look accretive on a cash basis, and management teams generally emphasize whichever metric supports the deal's rationale. Goodwill impairment is the other side of the risk: if the acquired business subsequently underperforms, the company may have to write down goodwill in a later period, creating a large one-time non-cash charge to earnings.