FD Calculator
Calculate Fixed Deposit maturity with quarterly, monthly or yearly compounding. Enter principal, rate and tenure to see interest earned and the maturity value.
Updated 2026-06-14 · Free · No sign-up · Runs privately in your browser
Show the formula & steps
How the FD Calculator Works
This calculator estimates the maturity value of a Fixed Deposit (FD). Enter your principal, the annual interest rate, the tenure in years and the compounding frequency, and it returns the interest earned and the final maturity amount. A fixed deposit locks a lump sum for a set term at a guaranteed rate, with interest compounding (most commonly quarterly).
The Formula
A cumulative FD grows by compound interest:
Maturity = Principal × (1 + rate ÷ n)^(n × years)
where:
- Principal = the amount deposited
- rate = annual interest rate as a decimal (e.g. 7% = 0.07)
- n = number of compoundings per year (4 for quarterly, 12 for monthly, 2 for half-yearly, 1 for yearly)
- years = tenure
Interest earned = Maturity − Principal
Worked Example
Suppose you deposit ₹1,00,000 at 7% per annum, compounded quarterly, for 5 years:
- n = 4, so rate ÷ n = 0.07 ÷ 4 = 0.0175
- Maturity = 1,00,000 × (1.0175)^(4 × 5) = 1,00,000 × (1.0175)^20
- Maturity ≈ ₹1,41,478
- Interest earned = 1,41,478 − 1,00,000 = ₹41,478
Maturity at Different Tenures (₹1,00,000 at 7%, quarterly)
| Tenure | Maturity value | Interest |
|---|---|---|
| 1 year | ₹1,07,186 | ₹7,186 |
| 3 years | ₹1,23,144 | ₹23,144 |
| 5 years | ₹1,41,478 | ₹41,478 |
| 10 years | ₹2,00,160 | ₹1,00,160 |
Why Compounding Frequency Matters
The more often interest compounds, the higher the maturity for the same nominal rate. Quarterly compounding (the bank default) beats yearly compounding, and monthly compounding beats quarterly — though the difference is small at typical FD rates.
Important Notes
- Most cumulative bank FDs compound quarterly; choose the frequency your bank states for an accurate figure.
- FD interest is fully taxable and may attract TDS.
- Senior citizens usually get a higher rate — enter that rate to see the better maturity.
- Premature withdrawal typically reduces the interest rate and may carry a penalty.
For monthly investing instead of a lump sum, use a recurring deposit calculator; for tax-free long-term saving, compare a PPF account.
Frequently asked questions
How is FD maturity amount calculated?+
A fixed deposit uses compound interest: maturity = principal × (1 + rate ÷ n) raised to (n × years), where n is the number of compoundings per year. Most cumulative bank FDs compound quarterly, so n is 4. The interest earned is the maturity minus the principal.
How much will 1 lakh become in an FD after 5 years?+
Investing ₹1,00,000 at 7% per annum compounded quarterly for 5 years gives a maturity of about ₹1,41,478 — roughly ₹41,478 in interest. The exact figure depends on the rate and the bank's compounding frequency.
What is the difference between cumulative and non-cumulative FD?+
A cumulative FD reinvests the interest and pays the full amount at maturity, so it compounds. A non-cumulative FD pays interest out monthly, quarterly or annually, so the principal stays the same and there is no compounding on the paid-out interest. This calculator models a cumulative FD.
Is FD interest taxable?+
Yes. Interest on a fixed deposit is fully taxable as income from other sources at your slab rate, and banks deduct TDS when annual interest crosses the threshold. A 5-year tax-saver FD qualifies for a Section 80C deduction, but the interest remains taxable.
Do senior citizens get a higher FD rate?+
Yes. Most Indian banks offer senior citizens an extra 0.25% to 0.75% over the standard rate. Enter the applicable senior-citizen rate in the calculator to see the higher maturity value.