Considering Debt, Cash, and Stock in M&A

An acquirer can fund a purchase with cash on its balance sheet, new debt, newly issued stock, or some combination of the three. That funding generally covers the target’s equity purchase price, refinanced debt, transaction fees, and other required uses of funds.

Cash and debt both let the buyer avoid issuing new shares, but they are economically different. Using cash reduces liquidity and sacrifices the interest that cash could have earned. Debt preserves cash but creates interest expense, repayment obligations, and additional financial risk. Stock avoids a fixed repayment obligation but gives part of the combined company to the seller.

In a simplified merger model, the relevant cost of debt is after-tax interest expense. Interest is generally tax-deductible, subject to applicable limitations. If debt carries a 6% interest rate and the effective tax rate is 25%, its simplified after-tax cost is 4.5%.

Cash has an economic cost too: the after-tax interest income the acquirer will no longer earn. Stock’s simplified cost can be viewed through the buyer’s earnings yield, calculated as earnings per share divided by share price. A buyer trading at a high price-to-earnings multiple has a low earnings yield, which can make stock relatively attractive for EPS accretion purposes.

• Cash: no new interest expense or share dilution, but lower liquidity and lost interest income.
• Debt: no new shares, but higher interest expense, leverage, and default risk.
• Stock: no mandatory repayment, but more shares outstanding and potential loss of control for existing owners.

Many deals use more than one funding source, so model the mix in separate pieces rather than applying one blended assumption to the entire purchase price. Start with total uses of funds, then assign a dollar amount to balance-sheet cash, each new debt tranche, and stock consideration. The sources should equal the transaction’s total uses.

Calculate the effect of each piece independently. Apply the relevant foregone yield to cash used, the stated interest rate and tax treatment to each debt tranche, and the assumed issuance price to the stock portion to determine new shares. Then combine those effects in pro forma net income and diluted shares. This keeps a cheap source from masking the constraints or costs of another.

A practical sensitivity table can compare a 100% balance-sheet cash case, a 100% debt case, a 100% stock case, and one or more feasible combinations. Track EPS accretion or dilution, remaining cash, leverage, and pro forma ownership under each scenario. The final mix is a judgment call, even when one scenario leads on EPS. Firm capacity, market conditions, and deal terms may rule out the mathematically cheapest option.

The lowest modeled financing cost may not be feasible. A highly leveraged buyer may be unable to borrow more without threatening its credit profile or violating debt covenants. Even a cash-rich buyer may need to retain liquidity for operations, capital expenditures, or unexpected losses.

Stock shifts some transaction risk to the seller because the seller participates in the combined company’s future performance. It can also help the buyer preserve borrowing capacity. However, issuing stock dilutes existing shareholders’ ownership and may give the seller meaningful voting power.

The parties must also decide whether the stock consideration is based on a fixed number of shares or a fixed dollar value (a detail that often gets missed under interview pressure). Market-price movements can change the number of shares issued or the value received. Tax treatment, financing certainty, and seller preferences also matter, and the exact implications vary by transaction and jurisdiction.

An acquisition is EPS-accretive when the buyer’s pro forma earnings per share exceed its standalone EPS. It is dilutive when pro forma EPS is lower. Financing affects both the numerator and denominator of that calculation.

Cash financing reduces the numerator through after-tax interest income forgone. Debt financing reduces it through after-tax interest expense. Stock financing increases the denominator by adding newly issued shares. A complete model must also include the target’s earnings, lost or gained interest, purchase accounting adjustments, synergies, new amortization, and transaction-specific tax effects.

1. Calculate the target’s earnings contribution and any synergies.
2. Subtract after-tax financing costs and purchase accounting impacts.
3. Divide combined net income by the buyer’s pro forma diluted shares.
4. Compare pro forma EPS with the buyer’s standalone EPS.

When asked whether a buyer should use debt, cash, or stock, do not base your answer only on EPS. First compare the after-tax costs. Then discuss balance-sheet capacity, liquidity, ownership dilution, control, market valuation, and execution risk.

For an accretion/dilution question, explain that cheaper financing generally supports accretion, all else equal. Then identify what changes in the model: cash creates foregone interest, debt creates interest expense, and stock increases shares outstanding. Finish by noting that synergies, purchase accounting, and the relative valuations of the buyer and target can change the result.

• Cash sacrifices liquidity and interest income; debt adds interest expense and leverage; stock increases shares and dilutes ownership.
• Accretion/dilution depends on the target’s earnings contribution relative to financing costs, purchase accounting effects, and new shares issued.
• A high-valuation buyer may find stock attractive because its earnings yield is low, while a constrained balance sheet may limit debt or cash funding.
• The financing mix should balance EPS impact with risk, control, liquidity, valuation, and transaction certainty.