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Compound Interest Calculator
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Compounding can help your investments grow significantly. You can also use a compound interest calculator to understand how compounding can help you earn high returns.
What is Compound Interest?
Let’s understand this with an example-
You invest Rs. 2 Lakhs in an investment instrument that compounds interest once every year. This investment pays 10% interest annually. In this case, the interest amount will be Rs. Rs. 20,000 after one year.
Due to compound interest, in the next year, you’ll earn interest based on the new amount, which is the sum of the principal amount of Rs. 2 Lakhs and the interest of Rs. 20,000. For the next term, interest will be calculated on Rs. 2,20,00. Therefore, the interest amount will be Rs. 22,000.
Thus, with the help of compound interest, the interest amount you earn will increase every year. Furthermore, it’s recommended to stay invested for a longer tenure to build wealth.
What is a Compound Interest Calculator?
How to Use the ABCD Compound Interest Calculator?
- Enter the principal amount (initial investment).
- Choose the compounding frequency (daily, monthly, quarterly, semi-annually, or annually).
- Input the rate of interest (%) and the time period (in days, weeks, months, quarters, or years).
- Click ‘Calculate’ to see the maturity amount.
- The calculator will display the final compounded amount and total interest earned.
What is Compound Interest Formula?
A = P(1+r/n)^nt
- A is the future value of the investment
- P is the principal amount
- r is the rate of interest
- n is the number of times interest is compounded every term
- t is the term of the investment
Here’s an example of how compounding helps your investment grow-
You make an investment of Rs. 10,000. It offers 5% interest every year for a tenure of 5 years.
| Year | Principal Amount | Interest Earned | New Balance Amount |
| Year 1 | Rs. 10,000 | Rs. 500 | Rs. 10,500 |
| Year 2 | Rs. 10,500 | Rs. 525 | Rs. 11,025 |
| Year 3 | Rs. 11,025 | Rs. 551.25 | Rs. 11,576.25 |
| Year 4 | Rs. 11,576.25 | Rs. 578.81 | Rs. 12,155.06 |
| Year 5 | Rs. 12,155.06 | Rs. 607.75 | Rs. 12,762.82 |
You can calculate the future value of your investment using this formula. However, manual calculations might lead to errors. To avoid this, you can use a compound interest calculator.
Compound Interest Example
- Year 1:
- Interest earned in the first quarter: ₹10,000 * (6%/4) = ₹150
- Principal after the first quarter: ₹10,000 + ₹150 = ₹10,150
- This process repeats for the next three quarters. Each quarter, the interest is calculated on the new principal, which includes the accumulated interest from previous quarters.
- Year 2:
- The interest is now calculated on the principal amount at the end of Year 1, which is higher than the initial ₹10,000 because of the compounded interest.
- Years 3, 4, and 5:
- This pattern continues. The interest earned each year is greater than the interest earned the previous year because the principal keeps increasing.
- A = Final Amount (what we want to find)
- P = Principal Amount (₹10,000)
- R = Annual Interest Rate (6% or 0.06)
- N = Number of times interest is compounded per year (quarterly, so 4)
- T = Number of years (5)
A = ₹10,000 (1 + 0.06/4)^(4 * 5) = ₹10,000 (1 + 0.015)^20 = ₹10,000 (1.015)^20 = ₹10,000 * 1.346855 = ₹13,468.55
So, after 5 years, your initial investment of ₹10,000 would grow to approximately ₹13,468.55. The total interest earned would be ₹13,468.55 - ₹10,000 = ₹3,468.55.
Simple Interest vs. Compound Interest
| Simple Interest | Compound Interest |
|---|---|
| Interest is earned only on the initial principal amount. | Interest is earned on both the principal and the accumulated interest from previous periods. |
| The principal remains unchanged throughout the investment period. | The principal increases after each compounding period. |
| Formula: SI = (P × T × R) / 100 | Formula: CI = P (1 + r/n)ⁿᵗ |
Simple Interest:
Simple interest is calculated only on the principal amount.
- Formula: SI = (P × R × T) / 100
- Example: A ₹10,000 investment at 5% per year for 3 years yields ₹1,500 in interest.
Compound Interest:
Compound interest is calculated on both principal + accumulated interest.
- Formula: A = P (1 + R/N)^(N × T)
- Example: The same ₹10,000 investment at 5% compounding annually for 3 years yields ₹1,576 in interest.
What are the Benefits of Compound Interest Calculator?
Helps You Calculate the Maturity Amount Easily
Helps You Pick the Right Investment Option
Helps You Understand the Value of Compounding
How Can You Benefit From Compound Interest?
- Compound interest allows investments to grow exponentially over time.
- The longer the duration, the greater the compounding effect.
- It is beneficial for long-term wealth creation through savings, FD, PPF, mutual funds, etc.
- Helps in achieving financial goals like retirement planning, children’s education, and wealth accumulation.
- Useful for investors who want to maximise returns by reinvesting earnings.
Use a Compound Interest Calculator to Calculate the Maturity Value of Your Investment
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FAQs (Frequently Asked Questions)
How does the ABCD Compound Interest Calculator help in choosing investments?
It helps estimate returns for different investment products like FDs, mutual funds, and PPF.
Why is compound interest so powerful?
Because it generates interest on both the initial investment and previously earned interest, increasing wealth over time.
What are some good compound interest investment options?
Fixed Deposits (FDs), Recurring Deposits (RDs), Mutual Funds, PPF, NPS, and reinvested dividends.
What is the 8-4-3 rule of compounding?
The 8-4-3 rule states that at an 8% annual return, your money will quadruple in 9 years and triple in 10 years. It helps investors estimate how quickly their wealth can grow through compounding.
What is the golden rule of compounding?
The golden rule of compounding is to start early, invest consistently, and stay invested for the long term. The longer you stay invested, the greater the exponential growth of your wealth.
DisclaimerThe information contained herein is generic in nature and is meant for educational purposes only. Nothing here is to be construed as an investment or financial or taxation advice nor to be considered as an invitation or solicitation or advertisement for any financial product. Readers are advised to exercise discretion and should seek independent professional advice prior to making any investment decision in relation to any financial product. Aditya Birla Capital Group is not liable for any decision arising out of the use of this information.