Cost of Debt Calculator India (2026) – After-Tax Capital Tool

In corporate finance, the Cost of Debt (Kd) is the effective rate that a company pays on its borrowed funds, such as loans, bonds, and other forms of debt. While the nominal interest rate on a loan might be 9%, the actual economic cost to the company is often significantly lower due to the tax treatment of interest expenses in India.

The **Cost of Debt Calculator India (2026)** is a professional-grade tool designed for finance students, business owners, and analysts. It goes beyond the simple interest calculation to incorporate the "Tax Shield"—the government's implicit subsidy on business borrowing. Because interest is an expense that reduces taxable income, the government effectively pays for a portion of your debt.

Tax Shield: Why Debt is "Cheaper" Than Equity

One of the most important principles in the Modigliani-Miller theorem and modern capital structure theory is that debt is generally cheaper than equity. There are two primary reasons for this:

• Lower Risk for Investors: Lenders have a priority claim on a company's assets and earnings. If a company fails, debt holders are paid before equity holders. This lower risk translates to a lower required return (interest rate).
• Tax Deductibility: In India, interest paid on business debt is a tax-deductible expense. Dividends paid to equity holders, however, are paid out of *after-tax* profits. This makes the "real" cost of debt much lower for a profitable company.