Cash vs. stock: how a deal is paid for
By SuperdayReps · Wharton MBA · ex-Greenhill · investment banking interview coaching
6 min read · updated July 2, 2026
Before an acquirer worries about strategy, it has to answer a plainer question: how do we pay for this? Cash, borrowed money, its own stock, or some mix. That choice isn't cosmetic. It changes the earnings per share math, it changes the risk the buyer takes on, and it tells the market what the buyer thinks its own shares are worth.
Three ways to fund a purchase. Each carries a different "cost" that eats into combined earnings.
| Consideration | What it costs the buyer | Rough size of that cost |
|---|---|---|
| Cash on hand | Forgone interest income | Low (a few percent) |
| New debt | After-tax interest expense | Low to moderate |
| New stock | A slice of every future dollar of earnings | High for most buyers |
This is the whole game. Understand why the three costs differ and the accretion/dilution answer falls out almost every time. Skip it, and you'll memorize a rule that breaks the moment the deal mix changes.
Cash and debt are usually cheap
Say a company sits on idle cash earning 4%. Use it to buy a business and you give up that 4% (less tax). That forgone interest is the only "cost" of paying cash. Now compare it to the earnings you're buying: if the target earns a 10% return relative to its price, you're swapping a 4% yield for a 10% one. EPS goes up. The deal is accretive.
Debt works the same way, just with borrowed money. If a buyer issues debt at 6% and the interest is tax-deductible, the after-tax cost of that debt at a 25% tax rate is only 4.5%. That deductibility is a real tax shield. Again you're funding an earnings stream that yields more than the financing costs, so EPS rises.
Cash and debt look accretive for the same reason: their after-tax cost is usually lower than the earnings yield of the company being bought. When financing is cheaper than what you're buying, combined EPS climbs. Stock is the expensive option because you hand over a permanent claim on every future dollar the combined company earns, not a fixed 4% or 6% coupon.
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Frequently asked
- How does paying in cash versus stock change whether a deal is accretive?
- Each source carries a cost that eats into combined earnings. Cash costs forgone interest income and debt costs after-tax interest, both usually below the target's earnings yield, so they tend to be accretive. Stock costs a permanent slice of every future dollar earned, so its answer depends entirely on relative P/E.
- Why are cash and debt deals usually accretive?
- Because their after-tax cost is usually lower than the earnings yield of the company being bought. Idle cash earning 4%, or debt costing 4.5% after tax, funds an earnings stream that yields more, so combined EPS climbs. Stock is the expensive option because you hand over a permanent claim on every future dollar earned.
- What does the way a buyer pays signal to the market?
- How you pay is a message. Paying cash signals the buyer thinks its shares are worth at least what they trade for, so it would rather spend cash than dilute. Paying stock can signal management believes its shares are richly priced and wants the seller to share the risk. All-stock deals draw more skeptical reactions.
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