Compound Interest Calculator

Shawn Plummer, CRPC

Chartered Retirement Planning Counselor

Compound Interest Calculator

A compound interest calculator is a tool that helps calculate the growth of an investment or loan over time, taking into account both the initial amount and the interest earned. It factors in compounding periods (annually, quarterly, semi-annually, monthly, weekly, and daily), interest rate, and time to provide accurate results. Individuals and financial professionals commonly use this calculator to plan and project future earnings or debts.

Our Favorite Rates To Grow Your Money

TermSavings AccountInstitutionAPY
N/AMoney Market AccountUncle Credit Union5.23%
N/ASavings AccountNexBank5.26%
12 MonthsCDBread Savings5.25%
5 YearsFixed AnnuityWichita National6.30%

Disclaimer: This is a comparison review. The Annuity Expert is not associated with a bank or credit union. We aim to help you find the highest interest rates for your savings. We may receive a small referral fee if you purchase something using a link in this guide.

What is Compound Interest?

Compound interest is the interest on a loan or deposit calculated based on both the initial principal and the accumulated interest from previous periods. It differs from simple interest, where interest is calculated solely on the principal amount.

How Does Compound Interest Work?

Compound interest grows at a faster rate than simple interest because it calculates interest on the accumulated interest over time. This means the amount of interest earned increases each period.

There are many different places you can save your money with various compounding periods. For example, you could save it in a savings account, a Roth IRA, or a traditional IRA. You could also save it in a certificate of deposit (CD) or annuity.

What Is Compounding

Example of Compound Interest Calculation:

For instance, if you invest $1,000 at an annual interest rate of 5%, compounded annually for 5 years, the calculation would be:

  • Year 1: $1,000 x 5% = $50 (Interest)
  • Year 2: ($1,000 + $50) x 5% = $52.50 (Interest)
  • And so on…
Savings Account Compounded Daily

How To Calculate Daily Compound Interest

To calculate daily compound interest, use the formula A = P(1 + r/n)^(nt), where A is the final amount, P is the principal, r is the annual interest rate, n is the number of times interest is compounded per year, and t is the number of years. Plug in the values and solve for A.

How Does Your Money Grow Interest Calculator

How To Calculate Interest Rate Per Month

To calculate the interest rate per month, divide the annual interest rate by 12. For example, if the annual interest rate is 6%, the monthly interest rate would be 0.5%.

How to calculate interest rate

How To Calculate Annual Interest Rate

To calculate the annual interest rate, divide the total interest paid by the principal amount and multiply it by the number of periods within a year. This formula is commonly used for loans and investments, providing an accurate measure of the annual interest rate.

Examples Of Interest Compounding

Compound interest means you earn money on the amount you saved or invested, plus on any interest you’ve already gotten. The more often your interest is calculated and added to your account, the more money you make. Here’s how it works in different situations:

  • Savings Accounts: You put money in the bank, and the bank gives you interest. If they calculate interest once a year, you’ll get interest on your first year’s interest during the second year. So, your money grows more each year because you’re earning interest on a bigger amount.
  • Certificates of Deposit (CDs): This is money you leave in the bank for a set time, and the bank pays you more interest. They might calculate your interest in different ways, affecting how much you get in the end.
  • Loans: When you borrow money, you have to pay interest. The way they calculate your interest can make a big difference in how much you end up paying back in total.

In all these cases, you’re making money not just on your original amount but also on the interest that keeps getting added to it. This cycle continues, and over time, it can lead to you earning or owing much more.

Define Compounding Interest

Why Use A Compound Interest Calculator

A compounding calculator is a handy tool for several reasons:

  • No Hard Math: Calculating compound interest by hand is complicated. This tool does the math for you accurately and quickly, so you don’t have to worry about making mistakes.
  • Planning Your Money: Knowing how compound interest will affect your savings, investments, or loans is essential. This calculator shows how your money will grow or how much a loan will cost you over time, helping you with your financial plans.
  • Choosing Between Options: If you’re considering different ways to invest your money, this tool can show you which might make you the most. It uses your starting amount, interest rate, and time to show you the future balance.
  • Setting Goals: When you have financial targets, like buying a house or retiring comfortably, the calculator helps you figure out how much you need to save or invest regularly to reach your goal on time.
  • Smart Decisions: This tool helps you see the long-term effects of your financial choices. You can check whether it’s better to start saving now or later or how different loan terms will affect your repayments.
  • Learning Tool: It’s also great for learning more about money matters. By trying out different scenarios, you can see how saving a little bit now can lead to big returns later because of compound interest.
What Is Compound Interest

Compound Interest Formula

The compound interest formula calculates the interest earned on an investment or loan that is compounded over time. The formula considers the principal amount, the interest rate, the number of compounding periods per year, and the period of the investment or loan.

The formula is:

A = P(1 + r/n)^(nt)


A = the future value of the investment or loan, including interest P = the principal amount (the initial investment or loan amount), r = the interest rate (expressed as a decimal), n = the number of times the interest is compounded per year t = the period (in years) of the investment or loan

To use the formula, you would plug in the values for P, r, n, and t and solve for A. For example, if you invest $1,000 at an annual interest rate of 5%, compounded quarterly for five years, the formula would be:

A = 1000(1 + 0.05/4)^(4*5) A = $1,283.35

Your investment would be worth $1,283.35 after five years, with $283.35 in interest earned.

Helpful Tool: Simple Interest Calculator

Daily Compound Interest Savings Account

Who Benefits From Compound Interest?

Compound interest benefits lenders, borrowers, and investors by accruing on both the initial principal and accumulated interest. Lenders, like banks, earn more compared to simple interest. Borrowers gain if they invest borrowed money at higher rates. Investors enhance returns through reinvestment in avenues like stocks or mutual funds, leveraging the compounding effect. Overall, it empowers individuals to increase wealth over time.

What Is Compounding Interest

Types Of Accounts Offer Compound Interest

The following savings plans offer compound growth at a daily, monthly, or annual rate:

Savings Account That Compounds Daily

Accounts That Charge Compound Interest

The following lines of credit charge compound interest:

  • Mortgage
  • Home equity loans
  • Auto loan
  • Student loan
  • A personal loan from a bank or credit union
  • Small business loan
  • Credit card accounts

Triple Compounding: The Power of Tax-Deferral

Now that you understand how compound interest grows, learn how to speed up your savings account’s compound annual growth rate. Here’s how triple compounding with tax-deferred growth works with savings accounts:

  • First, the initial investment earns compounding interest on your principal.
  • Second, the principal amount then earns compounded interest on your interest earned.
  • Finally, the initial principal earns interest on the money you usually lose to taxes.

Your annual interest rate compounds faster than any bank account, including savings, money market accounts, and CDs.

Compounding Interest Calculator

Next Steps

If you want to know how much interest your investment will earn, our compound interest calculator can help. The Calculator employs compound interest calculations to determine the future value of investments, incorporating various compounding periods. These include annual, semi-annual, monthly, weekly, and options for compounding daily to calculate the total interest accrued. Contact us today to request a service quote or learn more about our products and solutions.

Compound Interest Calculator

Compound Interest Quotes

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Frequently Asked Questions

How much interest do 2 million dollars earn?

Using our compound interest calculator, $2,000,000 invested can earn up to $335,480 in interest over five years. The interest is determined by the premium amount, the annuity’s term, and income withdrawn.

How much interest do 5 million dollars earn per year?

Using our compound interest calculator, $5,000,000 invested in a fixed deferred annuity can earn up to $167,740 per year in interest over five years. The interest is determined by the premium amount, the annuity’s term, and income withdrawn.

What is the yearly interest on 10 million dollars?

Using our compound interest calculator, $10,000,000 invested in a fixed deferred annuity can earn up to $335,480 per year in interest over five years. The interest is determined by the premium amount, the annuity’s term, and income withdrawn.

How much interest do 20 million dollars earn?

Using our compound calculator, $20,000,000 invested in a fixed deferred annuity can earn up to $3,354,800 in interest over five years. The interest is determined by the premium amount, the annuity’s term, and income withdrawn.

How much interest will I earn per month?

Assuming you’re asking how much interest you’ll earn on your savings account balance, the answer depends on the account’s interest rate and how much money is in the account. For example, if you have a savings account with a $10,000 balance and an interest rate of 1%, you’ll earn $100 in interest each month.

How much is $1,000 worth at the end of 2 years if the interest rate of 6% is compounded daily?

The future balance of $1,000 will be worth $1,127.49 after two years if the compounding period is daily.

What will $100k be worth in 20 years?

If the nominal annual interest rate is 4%, a beginning balance of $100,000 will be worth $219,112.31 after twenty years if compounded annually.

What is the future value of $1,000 after five years at 8% per year?

If compounding monthly, $1,489.85 is the total compound interest value after five years.

How do you compound interest monthly?

CI = P(1 + (r/12) )12t – P is the formula of monthly compound interest where P is the principal amount, r is the interest rate in decimal form, and t is the time.

Do banks offer compound interest?

For an excellent savings account, look for one at a bank that compounds interest daily and doesn’t charge monthly fees. Remember that banks usually express their interest rates as an annual percentage yield (APY) to account for the compounding effect.

What is the power of compound interest?

The power of compound interest lies in its ability to generate exponential growth over time by reinvesting earnings, leading to significant wealth accumulation and long-term financial advantages.

What is a compounding interest calculator?

A compounding interest calculator is a tool that helps individuals determine the growth of their investment over time. It takes into account the initial deposit, interest rate, compounding frequency, and duration of the investment. By using this calculator, users can accurately estimate the total amount they will have in the future.

How much interest will I earn on 50,000 in a year?

If someone invests $50,000 for a year, the amount of interest earned will depend on the interest rate offered by the financial institution. For example, if the rate is 3%, the person would earn $1,500 in interest. However, the actual amount will vary based on the specific terms and conditions of the investment.

What is compound interest?

Compound interest is the interest on a loan or deposit calculated based on the initial principal and the accumulated interest from previous periods. It differs from simple interest, which is calculated solely on the principal amount.

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*Disclosure: Some of the links in this guide may be affiliate links. I may receive a commission at no cost to you if you purchase a policy. It helps us keep the lights on!

Shawn Plummer, CRPC

Chartered Retirement Planning Counselor

Shawn Plummer is a Chartered Retirement Planning Counselor, insurance agent, and annuity broker with over 14 years of first-hand experience with annuities and insurance. Since beginning his journey in 2009, he has been pivotal in selling and educating about annuities and insurance products. Still, he has also played an instrumental role in training financial advisors for a prestigious Fortune Global 500 insurance company, Allianz. His insights and expertise have made him a sought-after voice in the industry, leading to features in renowned publications such as Time Magazine, Bloomberg, Entrepreneur, Yahoo! Finance, MSN, SmartAsset, The Simple Dollar, U.S. News and World Report, Women’s Health Magazine, and many more. Shawn’s driving ambition? To simplify retirement planning, he ensures his clients understand their choices and secure the best insurance coverage at unbeatable rates.

The Annuity Expert is an independent online insurance agency servicing consumers across the United States. The goal is to help you take the guesswork out of retirement planning and find the best insurance coverage at the cheapest rates

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