FD Calculator
Find the maturity amount and interest on a fixed deposit for any compounding frequency.
How it works
Enter the principal, the interest rate and the period, then choose a compounding frequency. The rate is divided by the number of compounding periods a year, and the principal grows once per period for the whole deposit term.
Maturity = P × (1 + r ÷ n)^(n × t)
Interest = Maturity − PExample
₹1,00,000 at 7% a year for 5 years, compounded quarterly: n = 4, so Maturity = 1,00,000 × (1.0175)^20 = ₹1,41,478. The interest earned is ₹41,478.
Common mistakes
- Ignoring the compounding frequency. At the same quoted rate, more frequent compounding gives a slightly higher maturity amount.
- Entering months while the unit is years. 18 years is very different from 18 months.
- Forgetting tax on the interest, which reduces what you keep.
Results are estimates and are for informational purposes only.
About this calculator
Enter the amount you deposit, the annual interest rate and the period, in years or months. Pick how often interest is compounded and the calculator returns the interest earned, the maturity amount and the effective annual yield.
Quarterly compounding is selected by default because it is common among Indian banks, but it is a convention and not a rule, so check what your bank uses. Tax deducted at source, early-withdrawal penalties and special rates for senior citizens are not included.
Frequently asked questions
How is FD maturity calculated?
With Maturity = P × (1 + r ÷ n)^(n × t), where r is the annual rate as a decimal, n is the number of compounding periods a year and t is the time in years. ₹1,00,000 at 7% for 5 years, compounded quarterly, becomes about ₹1,41,478.
Does the compounding frequency matter?
A little. For ₹1,00,000 at 8% for one year the maturity is ₹1,08,000 compounded annually, ₹1,08,243.22 quarterly and ₹1,08,299.95 monthly. The calculator shows the effective annual yield so you can compare.
Which compounding frequency should I pick?
Use the one your bank states for the deposit. Quarterly is common in India and is the default here, but banks decide their own convention.
Does this include TDS or penalties?
No. It shows the gross maturity amount at the rate and period you enter. Tax deducted at source and early-withdrawal penalties are not applied.