Cash vs. Stock Consideration

Step 1: After-Tax Proceeds — Cash Deal

Using the purchase price ($400.0m), tax basis ($250.0m), and capital gains tax rate (20%, 0.20):

After-Tax Proceeds = $400.0m − [($400.0m − $250.0m) × 0.20] = $400.0m − $30.0m = $370.0m

In a cash deal, the seller's gain is realized immediately and taxed in the year of closing. The $30.0m tax bill is unavoidable — the seller cannot defer it by choosing a different closing date, only by choosing a different form of consideration.

Step 2: Shares Received — Stock Deal

Using the purchase price ($400.0m) and the acquirer's share price ($50.00):

Shares Received = $400.0m / $50.00 = 8.0m shares

Because the seller exchanges target stock for acquirer stock rather than cash, the transaction can typically qualify for tax deferral under a reorganization — the gain is not taxed until the seller eventually sells the acquirer shares. Whether it fully qualifies depends on meeting continuity-of-interest and other statutory requirements, which is why stock-for-stock structuring is a specialized area of M&A tax law.

Step 3: Seller's Pro-Forma Ownership

Using the shares received (8.0m) and acquirer shares outstanding pre-deal (100.0m):

Pro-Forma Ownership % = 8.0m / (100.0m + 8.0m) = 8.0m / 108.0m = 7.4%

This is the stake the seller now holds in the combined entity. It's a small slice of a much larger company, but it's a real, ongoing position — unlike a cash sale, where the seller's relationship with the business ends at closing.

Step 4: Seller's Exposure to Synergy Value

Where: PV of Expected Synergies = $60.0m, Pro-Forma Ownership % = 7.4%.

Seller's Synergy Capture = 7.4% × $60.0m = $4.4m

In the stock deal, the seller participates in $4.4m of the value the deal is expected to create — but also bears their pro-rata share of the risk if those synergies don't materialize, or if the combined company's stock underperforms for unrelated reasons. In the cash deal, the seller's synergy capture is $0: once the deal closes, all upside (and downside) belongs entirely to the acquirer's existing shareholders.

Final Results

• After-tax proceeds, cash deal: $370.0m
• Shares received, stock deal: 8.0m shares (7.4% of the combined company)
• Seller's synergy value capture: $4.4m (stock deal) vs. $0 (cash deal)

This comparison is the economic core of the cash-vs-stock decision: cash gives the seller certainty and an immediate, fully taxed exit, while stock defers the tax bill but ties the seller's remaining wealth to the success of the very deal they just agreed to — which is also why the market often reads an all-stock offer as a signal that the buyer is less confident the combined entity will outperform on its own, since a truly confident acquirer would rather keep more of the upside for its existing shareholders by paying cash.

Would you like to explore how a collar mechanism can protect both sides against acquirer share price swings between signing and closing?