FD Calculator
Calculate fixed deposit maturity value and interest with quarterly compounding.
About the FD Calculator
A Fixed Deposit (FD) remains the most trusted savings instrument in India. The AlarmDaddy FD Calculator computes the maturity amount and total interest on any bank or post-office FD using quarterly compounding — the method almost all Indian banks actually use.
Enter your deposit amount, the annual interest rate (FD rates in 2026 range from about 6.5% to 7.75% for general citizens, with senior citizens getting an extra 0.5%), and the tenure. The calculator returns the maturity value and the interest earned. It is handy for comparing a 1-year versus 5-year FD, or for checking whether a small finance bank's higher rate is worth the deposit-insurance consideration.
Remember that FD interest is fully taxable as per your income slab, and banks deduct TDS if interest crosses ₹40,000 in a year (₹50,000 for senior citizens). The maturity figure here is pre-tax.
How to use this calculator
- 1Enter the FD deposit amount.
- 2Enter the annual interest rate offered by your bank.
- 3Enter the tenure in years (and months if needed).
- 4Read the maturity value and total interest earned.
The formula
Where P is the principal, r is the annual interest rate (decimal), and t is the tenure in years. The /4 and ×4 reflect quarterly compounding, which is the standard for Indian bank FDs.