In the static trade-off theory of capital structure, the optimal debt level occurs where which two components balance?

• A. Tax shield benefits and agency costs
• B. Interest payments and taxes
• C. Bankruptcy costs and firm size
• D. Tax shield benefits and bankruptcy/distress costs

Answer: (D)

The key idea is that the value of debt comes from the tax savings on interest, but this value is offset by the costs that arise if the firm becomes financially distressed. In the static trade-off framework, a company should choose its debt level where the extra value from one more dollar of debt—the tax shield benefit—just equals the extra expected cost from potential distress and bankruptcy. If debt is too low, the tax benefits aren’t fully exploited; if debt is too high, the risk and costs of distress erode value. The balance point, where these marginal effects are equal, determines the optimal debt level.

The tax shield benefits come from interest being deductible, reducing taxable income. The bankruptcy or distress costs include direct costs of financial trouble (legal fees, court costs) and indirect costs (lost customers, disrupted operations, higher borrowing costs, loss of flexibility) that can devalue the firm.