Compound Interest Calculator
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A compound interval refers to the frequency at which interest is added to the principal amount in a compounding process. Yearly
Half-Yearly
Quarterly
Monthly
A compound interest calculator estimates how your money grows over time by compounding. By entering your principal, interest rate, and compounding frequency, it shows how small, consistent investments can accumulate into potential growth.
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Compound interest example
Let us understand the power of compounding with a simple example. Suppose you invest ₹50,000 at an assumed annual rate of return of 10% for 5 years with yearly compounding.
The compound interest formula used earlier helps calculate the total investment value at the end of the investment period:
A = P (1 + r/n)nt
Another commonly used formula is:
CI = P [(1 + r/n)nt – 1]
Where:
• CI is the compound interest earned
• P is the initial investment amount
• r is the annual rate of return
• n is the number of times interest compounds in a year
• t is the investment duration
The difference between the two formulas is simple:
• The first formula calculates the total investment value at maturity.
• The second formula calculates only the compound interest earned.
Here’s how the investment may potentially grow over 5 years:
| Year | Opening Amount | Interest Earned (10%) | Closing Amount |
| 1 | ₹ 50,000 | ₹ 5,000 | ₹ 55,000 |
| 2 | ₹ 55,000 | ₹ 5,500 | ₹ 60,500 |
| 3 | ₹ 60,500 | ₹ 6,050 | ₹ 66,550 |
| 4 | ₹ 66,550 | ₹ 6,655 | ₹ 73,205 |
| 5 | ₹ 73,205 | ₹ 7,320 | ₹ 80,526 |
In this example, the interest earned increases every year because returns are calculated on the growing investment amount instead of only the original investment.
The figures shown are for illustrative purpose only.
Daily vs monthly vs quarterly vs yearly compounding
The frequency of compounding can influence how often returns get added back to your investment and how your investment may potentially grow over time:
Daily compounding
In daily compounding, interest is calculated and added to the investment every day. Since returns are added more frequently, the investment may potentially grow slightly faster over time compared to lower compounding frequencies.
Monthly compounding
In monthly compounding, interest is added to the investment once every month. This compounding frequency is commonly seen in certain investment and savings products.
Quarterly compounding
In quarterly compounding, interest is calculated and added every three months. This gives the investment four compounding cycles in a year, which may influence the overall investment value over time.
Yearly compounding
In yearly compounding, interest is added to the investment once at the end of each year. While compounding happens less frequently, long-term investing may still benefit from the power of compounding over time.
The actual impact of compounding frequency may vary depending on the investment product, applicable returns, and investment duration.
Difference Between Simple Interest and Compound Interest
Simple interest and compound interest both help calculate returns, but the way interest is calculated in each method is different:
| Basis | Simple Interest | Compound Interest |
| Interest Calculation | Interest is calculated only on the original investment amount | Interest is calculated on the original investment amount and the accumulated interest |
| Principal Amount | The principal amount remains the same throughout the investment period | The principal amount changes after every compounding cycle as returns get added back |
| Growth Pattern | Investment growth usually remains steady over time | Investment growth may potentially increase over time through the power of compounding |
| Formula | SI = (P × R × T) / 100 | CI = P [(1 + r/n)^nt – 1] |
| Suitable For | Commonly used for short-term borrowing or lending | Commonly considered for long-term investing and wealth accumulation goals |
| Return Potential | Potential returns may be comparatively lower over longer periods | Returns may potentially accumulate over longer investment durations |
Benefits of compound interest
Compound interest can play an important role in long-term financial planning by helping your investments accumulate over time:
Long-term growth
The longer you stay invested, the more time your investments get to benefit from the power of compounding.
Investment discipline
Regular investing over time can help you build consistent financial habits.
Inflation management
Investments with long-term growth potential may help manage the impact of inflation on savings over time.
Financial goals
Compound interest can support long-term goals such as retirement, higher education, or buying a home.
SIP investing
Regular investments through an SIP can help investors participate in long-term market-linked growth and compounding potential.
Factors that affect compound interest returns
Several factors can influence how your investments potentially grow over time through the power of compounding:
Investment amount
A higher investment amount can increase the overall return potential over time.
Rate of return
The expected rate of return plays an important role in determining the future investment value.
Investment duration
Longer investment periods give your investments more time to compound.
Compounding frequency
More frequent compounding can slightly increase the overall investment value over time.
Regular investing
Consistent investments, such as through an SIP, can support long-term wealth accumulation potential.
How to use the Bajaj Finserv AMC compound interest calculator
The Bajaj Finserv AMC compound interest calculator helps you estimate how your investments may potentially grow over time in just a few simple steps:
1. Enter your principal investment amount using the slider or input field.
2. Select the assumed rate of return based on your investment expectations.
3. Choose the time period for which you plan to stay invested.
4. Select the compounding interval such as monthly, quarterly, half-yearly, or yearly.
5. View the estimated maturity amount, total principal invested, and potential returns instantly.
6. Adjust different values to compare multiple investment scenarios and understand the power of compounding more effectively.
You can use this free compound interest calculator as many times as you like to compare different investment scenarios and plan your financial goals with greater clarity.
The calculator is an aid, not a prediction tool. It may provide only an indicative picture.
Advantages of using the Bajaj Finserv AMC compound interest calculator
Here are some advantages of using the Bajaj Finserv AMC compound interest calculator:
Quick estimates
The calculator gives you instant estimates without the need for manual calculations.
Simplifies financial planning
You can explore how different investment amounts, returns, and time periods may influence future investment value.
Helps compare scenarios
The calculator makes it easier to compare multiple investment scenarios in one place.
Easy to use
The simple layout allows you to calculate potential returns quickly and conveniently.
Supports goal-based investing
The compound interest calculator can help you estimate investments for long-term financial goals while understanding the power of compounding.
How does the power of compounding work in mutual funds?
In mutual funds, the power of compounding works when your invested money and the potential returns earned on it remain invested over time. As returns stay invested, they may continue generating additional returns, which can support long-term wealth accumulation potential.
This is why many investors choose to stay invested for longer periods instead of focusing on short-term market movements. Starting early and investing consistently through a Systematic Investment Plan (SIP) may further support the long-term benefits of compounding.
Mutual Fund investments are subject to market risks, read all scheme related documents carefully.
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FAQs
What is compound interest in simple terms?
Compound interest is the interest earned on both your original investment and the returns already added to it over time. This is why it is often called “interest on interest”.
What is the formula for compound interest?
The compound interest formula is:
A = P (1 + r/n)^nt
Here, P is the principal amount, r is the annual rate of return, n is the compounding frequency, and t is the investment duration.
What is the difference between simple and compound interest?
Simple interest is calculated only on the original investment amount, while compound interest is calculated on both the principal amount and accumulated returns.
What is daily, monthly and yearly compounding?
Daily, monthly, and yearly compounding refer to how often interest or returns get added back to your investment. More frequent compounding can slightly increase the overall investment value over time.
Can I calculate compound interest with monthly contributions?
Yes, a compound interest calculator can help you estimate how your investments may potentially grow over time with regular monthly contributions such as a Systematic Investment Plan (SIP).
Is compound interest better than simple interest?
Compound interest is commonly considered more suitable for long-term investing because returns remain invested and can potentially generate additional returns over time.
How much will ₹1 lakh grow in 10 years with compound interest?
At an assumed annual rate of return of 12%, ₹1 lakh could potentially grow to around ₹3.11 lakh over 10 years through yearly compounding.
The figures shown are for illustrative purpose only.
Which investments offer compound growth?
Investment options such as mutual funds, SIPs, Public Provident Fund (PPF), Fixed Deposits (FDs), and National Pension System (NPS) can offer compounding benefits over time.
What factors affect compound interest?
Factors such as investment amount, expected rate of return, investment duration, compounding frequency, and regular contributions can affect compound interest returns.
How does compounding help in mutual funds?
In mutual funds, the potential returns earned remain invested and may continue generating additional returns over time, which can support long-term wealth accumulation goals.
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Disclaimer
The calculator alone is not sufficient and shouldn’t be used for the development or implementation of an investment strategy. This tool is created to explain basic financial / investment related concepts to investors. The tool is created for helping the investor take an informed investment decision and is not an investment process in itself. Bajaj Finserv AMC has tied up with AdvisorKhoj for integrating the calculator to the website. Mutual Fund does not provide guaranteed returns. Also, there is no assurance about the accuracy of the calculator. Past performance may or may not be sustained in future, and the same may not provide a basis for comparison with other investments. Investors are advised to seek professional advice from financial, tax and legal advisor before investing in mutual funds.
