The FD calculator (FD interest calculator) shows the maturity value and interest on any bank or post office fixed deposit, with quarterly, monthly, half-yearly or yearly compounding, plus a senior citizen option.
FD maturity examples
- Rs. 1 lakh for 3 years at 7%, quarterly compounding: Rs. 1,23,144 (interest Rs. 23,144).
- Rs. 5 lakh for 5 years at 7.5%, quarterly compounding: about Rs. 7.25 lakh (interest about Rs. 2.25 lakh).
Maturity = P x (1 + r / n)^(n x t) P = deposit, r = annual rate, n = compounding periods a year (4 for quarterly), t = years
Post Office time deposit rates
| Post Office TD | Rate (Oct-Dec 2026) |
|---|---|
| 1 year | 6.9% |
| 2 years | 7.0% |
| 3 years | 7.1% |
| 5 years (80C) | 7.5% |
Post Office TD interest is calculated quarterly and paid annually. Bank FD rates differ by bank and change often; check your bank’s current card.
Tax and TDS on FD
- FD interest is fully taxable at your slab rate, every year, even on cumulative FDs.
- Banks deduct TDS if interest from one bank exceeds Rs. 50,000 a year (Rs. 1 lakh for senior citizens).
- Submit Form 15G (or 15H for seniors) if your total income is below the taxable limit.
- Only the 5-year tax-saver FD qualifies for 80C, in the old regime.
Frequently asked questions
How is FD interest calculated quarterly?
The annual rate is divided by 4 and applied every quarter on the principal plus interest already added. That is why the effective yield is a little higher than the quoted rate.
FD or NPS for retirement?
FD is safe and liquid but fully taxable and usually below inflation after tax. For long-term retirement savings, NPS or PPF are more efficient; FDs suit emergency funds and near-term needs.