FD Calculator

An FD (Fixed Deposit) calculator is an online financial tool that helps investors compute the maturity amount, interest earned, and effective yield of a fixed deposit — based on inputs of the principal amount, interest rate, tenure, and compounding frequency. For cumulative FDs (where interest is compounded and paid at maturity), the maturity amount is calculated as: A = P × (1 + r/n)^(n×t), where P is the principal, r is the annual interest rate, n is the compounding frequency per year, and t is the tenure in years. For non-cumulative FDs (where interest is paid out periodically), the calculator shows the regular income the investor will receive. In India, FD interest rates vary across institutions — typically ranging from 5.5% to 7.5% for regular bank FDs, with senior citizen rates 0.25% to 0.5% higher, and small finance bank FDs offering up to 8.5% to 9%. An FD calculator helps investors compare the maturity amounts across different institutions, tenures, and compounding frequencies before making a deposit decision. It also enables comparison of post-tax FD returns against alternative instruments like debt mutual funds and bonds — factoring in that FD interest is fully taxable at the investor's applicable income tax slab rate, which significantly reduces net returns for investors in the 30% bracket.