FD calculator
Estimate your fixed deposit maturity and interest earned. Enter the amount, rate, tenure and compounding. Runs entirely in your browser, before tax.
How FD interest is calculated
Banks pay compound interest on most fixed deposits, usually compounded quarterly. Each quarter the interest is added to your balance, and the next quarter earns interest on that larger balance. The formula is:
A = P × (1 + r / n) ^ (n × t)
where P is your deposit, r is the annual rate as a decimal (for example 7.5 percent is 0.075), n is how many times a year interest compounds (4 for quarterly) and t is the tenure in years. Interest earned is simply A minus P.
More frequent compounding raises the maturity slightly for the same headline rate, which is why banks quote an annualised yield alongside the rate. Short deposits below six months are often paid simple interest instead. The rates on this site are indicative and change often, so use your bank's exact rate here and confirm the maturity with them.
Frequently asked questions
How is FD interest calculated?
Most banks compound fixed deposit interest quarterly. Maturity is P times (1 plus r divided by n) to the power of n times t, where P is the principal, r is the annual rate as a decimal, n is the number of compounding periods a year (4 for quarterly) and t is the tenure in years. This calculator uses that formula.
Does this calculator deduct tax?
No. It shows the gross maturity and interest before tax. FD interest is taxable at your income slab and TDS may apply above the annual threshold, so your in-hand return will be lower. This is not investment advice.
Which compounding should I choose?
Quarterly is the most common for bank FDs, so it is the default. Some banks or schemes compound monthly, half-yearly or yearly. More frequent compounding gives a slightly higher maturity for the same rate. Use whatever your bank applies.
Are the results exact?
They are a close estimate. Banks may round differently, use simple interest for short tenures, or apply the exact day count. Always confirm the maturity with your bank. Rates here are indicative and change often.