What Is a Fixed Deposit (FD) Calculator?
A Fixed Deposit (FD) Calculator computes the maturity amount and interest earned on a bank or post office fixed deposit. FDs are India's most popular guaranteed savings instrument, offering fixed interest rates over a predetermined tenure ranging from 7 days to 10 years.
As of 2026, leading Indian banks offer FD rates between 6.5% and 9.5% per annum — with small finance banks and senior citizens receiving preferential rates.
FD Maturity Amount Formula
Simple Interest FD:
Maturity = P + (P × r × t / 100)
Compound Interest FD (quarterly compounding):
M = P × (1 + r/4)^(4t)
Where: P = Principal, r = Annual interest rate,t = Tenure in years.
Example: ₹1 lakh at 8% p.a. for 5 years with quarterly compounding gives a maturity amount of ₹1,48,451.
FD Interest Rates Comparison 2026
| Bank | General (1–3 yr) | Senior Citizen |
|---|---|---|
| SBI | 6.80% | 7.30% |
| HDFC Bank | 7.00% | 7.50% |
| ICICI Bank | 6.90% | 7.40% |
| Small Finance Banks | 8.50–9.50% | 9.00–10.00% |
FD Tax Treatment in India
- FD interest is 100% taxable as "Income from Other Sources" at your applicable slab rate.
- TDS is deducted at 10% if annual interest exceeds ₹40,000 (₹50,000 for senior citizens).
- Submit Form 15G/15H if income is below taxable limit to avoid TDS.
- 5-year tax-saving FD qualifies for 80C deduction up to ₹1.5 lakh, but interest remains taxable.