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Fixed Deposit Calculator
Find the maturity value and interest earned on a fixed deposit using compound interest, and watch how the deposit grows over the term. Enter your numbers and press Calculate.
Written by TopicDrill Editorial Team·Updated June 2026
Deposit growth over time
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How a fixed deposit works
A fixed deposit, also called a term deposit, is a lump sum you lock away with a bank for a set period at a fixed interest rate. In exchange for not touching the money, you earn a guaranteed return that is usually higher than a regular savings account. The interest compounds, so each period you earn interest on both the deposit and the interest already credited.
The growth chart shows this clearly. The line curves upward slightly because compounding accelerates the balance the longer the money stays invested.
A quick example
Deposit $10,000 at 5% for 5 years with quarterly compounding. The maturity value works out to roughly $12,820, meaning about $2,820 in interest. Choosing monthly compounding or a longer term would nudge that figure a little higher.
Things to keep in mind
The rate is fixed for the whole term, which protects you if rates fall but means you miss out if they rise. Interest is generally taxable, and early withdrawal usually reduces your return. For a deeper look at how compounding builds wealth, try our compound interest calculator or compare it with our simple interest calculator.
Frequently asked questions
How is FD maturity value calculated?
Most fixed deposits use compound interest with the formula A = P(1 + r/n)^(n·t), where P is the deposit, r is the annual rate as a decimal, n is the number of times interest compounds per year, and t is the term in years. The interest earned is the maturity value minus your original deposit.
Does compounding frequency change my return?
Yes, though the effect is modest. For the same nominal rate, more frequent compounding such as monthly or quarterly produces a slightly higher maturity value than yearly compounding, because interest starts earning interest sooner. The longer the term, the more this adds up.
What happens if I withdraw an FD early?
Breaking a fixed deposit before maturity usually means a lower interest rate and sometimes a penalty, so you receive less than the figure shown here. Only deposit money you are comfortable locking away for the full term.
Is FD interest taxable?
In most places the interest you earn on a fixed deposit is taxable income in the year it is credited. This calculator shows the gross amount before tax. Check your local rules to estimate the after-tax return.
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