Fixed Deposit Calculator
Maturity amount and profit on a fixed deposit, with the profit rate and tax you enter.
Savings & Growth
Compound Interest Calculator
See how money grows when the return itself earns a return. Enter a starting amount, what you add each month, and the annual return you assume, and this calculator shows the final amount, how much you put in, how much is growth, and the balance at the end of every year.
No live data. Every rate, price, and percentage on this page is entered by you. Nothing is fetched from a bank, a market, or a government source, and no figure here is presented as a live or official rate.
Your result will appear here.
Enter your details to see your result.
You will see your answer with the figures shown, so you can check it.
Result
Total you put in
Interest earned
| Year | Balance | Total put in | Interest earned |
|---|
Estimate only — check important figures before acting. Read the full disclaimer.
How it works
- Enter the amount you start with (0 is fine), the amount you add each month, and the annual return you assume.
- Choose how often the return is compounded. Monthly compounding is the default; quarterly, half-yearly, and annual are also available.
- You see the final amount, the total you put in, and the interest earned, plus a table showing the balance at the end of each year.
Contributions are treated as added at the end of each compounding period, so they start earning a return from the next period. The return you enter is an assumption — real returns vary and are never guaranteed.
Formula
Balance after each period = Previous balance × (1 + annual rate ÷ periods per year) + contribution for the period
With no contributions, this is the familiar form: Final amount = Principal × (1 + r ÷ n)n × t, where r is the annual rate, n is the number of compounding periods per year, and t is the number of years.
Interest earned = Final amount − Total put in (starting amount + all monthly contributions).
Worked example
Example: Rs 100,000 to start, Rs 5,000 a month, at 10% a year compounded monthly for 10 years, grows to Rs 1,294,929.07. You put in Rs 700,000 in total (Rs 100,000 + Rs 5,000 × 120 months), so Rs 594,929.07 is interest. After year 1 the balance is Rs 173,299.13, and after year 5 it is Rs 551,716.24.
Frequently asked questions
What is compound interest?
Compound interest is a return earned on both the original amount and the returns already added. That is why growth speeds up over time: each year the return is worked out on a larger balance.
Does the starting amount or the monthly contribution matter more?
Both matter. The starting amount has the longest time to grow, while regular monthly contributions add up steadily. In the worked example, Rs 5,000 a month for 10 years adds Rs 600,000 of the Rs 700,000 total put in.
What return should I enter?
Enter a return you are comfortable assuming, and try a lower one too, so you can see the range. The calculator does not know or suggest any real rate, and no return is guaranteed.
How does compounding frequency change the result?
More frequent compounding adds the return to the balance more often, so the balance grows slightly faster at the same annual rate. Monthly compounding gives a little more than annual compounding over the same years.
Are tax and charges included?
No. The result is before any tax, fees, or charges. A real account or fund may deduct these, so the amount you receive could be lower.
Can I use this for a loan as well?
The maths is similar, but loans reduce the balance with each payment. For a loan, use the EMI / Loan Calculator, which shows the instalment and the full repayment schedule.
Still have a question? Contact us.
Important — please read
Results are illustrations based on the return and contributions you enter. The return is your assumption, not a forecast and not a promise from any bank or fund. Real returns vary, charges and tax are not included, and past growth does not guarantee future growth. This is not investment advice.