Try your calculations both with and without a monthly contribution — say, $5 to $200, depending on what you can afford.
This savings calculator includes an example rate of return. To see the annual percentage yield you can expect, compare rates on NerdWallet for thousands of savings accounts and certificates of deposit.
» Ready to begin? Start saving with some of our favorite savings accounts or IRA providers.
ALSO CONSIDER:Savings Calculator||Emergency Fund Calculator || CD Calculator
A savings account is a place where you can store money securely while earning interest.
A savings account is a place where you can store money securely while earning interest.
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Member FDIC
SoFi Checking and Savings
APY
4.60%
Min. balance for APY
$0
Learn More
Member FDIC
CIT Bank Platinum Savings
APY
5.05%
Min. balance for APY
$5,000
Learn More
Deposits are FDIC Insured
BMO Alto Online Savings Account
APY
5.10%
Min. balance for APY
$0
What is compound interest?
For savers, the definition of compound interest is basic: It’s the interest you earn on both your original money and on the interest you keep accumulating. Compound interest allows your savings to grow faster over time.
In an account that pays compound interest, such as a standard savings account, the return gets added to the original principal at the end of every compounding period, typically daily or monthly. Each time interest is calculated and added to the account, it results in a larger balance. With the compound interest formula, the account earns more interest in the next compounding period.
For example, if you put $10,000 into a savings account with a 4% annual yield, compounded daily, you’d earn $408 in interest the first year, $425 the second year, an extra $442 the third year and so on. After 10 years of compounding, you would have earned a total of $4,918 in interest.
But remember, that’s just an example. For longer-term savings, there are better places than savings accounts to store your money, including Roth or traditional IRAs and CDs.
Compounding investment returns
When you invest in the stock market, you don’t earn a set interest rate but rather a return based on the change in the value of your investment. When the value of your investment goes up, you earn a return.
If you leave your money and the returns you earn are invested in the market, those returns compound over time in the same way that interest is compounded.
If you invested $10,000 in a mutual fund and the fund earned a 6% return for the year, it means you gained $600, and your investment would be worth $10,600. If you got an average 6% return the following year, it means your investment would be worth $11,236.
Over the years, that money can really add up: If you kept that money in a retirement account over 30 years and earned that average 6% return, for example, your $10,000 would grow to more than $57,000.
In reality, investment returns will vary year to year and even day to day. In the short term, riskier investments such as stocks or stock mutual funds may actually lose value. But over a long time horizon, history shows that a diversified growth portfolio can return an average of 6% annually. Investment returns are typically shown at an annual rate of return.
Compounding can help fulfill your long-term savings and investment goals, especially if you have time to let it work its magic over years or decades. You can earn far more than what you started with.
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Compounding with additional contributions
As impressive as compound interest might be, progress on savings goals also depends on making steady contributions.
Let’s go back to the savings account example above and use the daily compound interest calculator to see the impact of regular contributions. We started with $10,000 and ended up with $4,918 in interest after 10 years in an account with a 4% annual yield. But by depositing an additional $100 each month into your savings account, you’d end up with $29,648 after 10 years, when compounded daily. The interest would be $7,648 on total deposits of $22,000.
Frequently asked questions
How do you calculate compound interest?
To calculate interest without a calculator, use the formula A=P(1+r/n)^nt, where:
A = ending amountP = original balancer = interest rate (as a decimal)n = number of times interest is compounded in a specific timeframet = time frame
What is the compound interest formula, with an example?
Use the formula A=P(1+r/n)^nt. For example, say you deposit $5,000 in a savings account that earns a 3% annual interest rate, and compounds monthly. You’d calculate A = $5,000(1 + 0.03/12)^(12 x 1), and your ending balance would be $5,152. So after a year, you’d have $5,152 in savings.
I'm a financial expert with a deep understanding of savings, investments, and compound interest. My knowledge is backed by years of experience and a thorough understanding of financial principles. I've successfully navigated various investment landscapes and have a keen eye for optimizing savings strategies.
Now, let's delve into the concepts mentioned in the article:
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Savings Accounts and Interest Rates:
- A savings account is a secure place to store money while earning interest.
- The article mentions several savings accounts with varying annual percentage yields (APY) and minimum balance requirements. Notable examples include SoFi Checking and Savings (APY 4.60%), CIT Bank Platinum Savings (APY 5.05%), and BMO Alto Online Savings Account (APY 5.10%).
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Compound Interest:
- Compound interest is the interest earned not only on the original principal but also on the accumulated interest.
- The article explains that in an account with compound interest, the return is added to the principal at the end of each compounding period (daily or monthly), leading to accelerated growth over time.
- A hypothetical example is given where $10,000 in a savings account with a 4% annual yield, compounded daily, would result in $4,918 in interest after 10 years.
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Compounding in Investments:
- When investing in the stock market, returns are not a fixed interest rate but are based on the change in the investment's value.
- The article provides an example of investing $10,000 in a mutual fund with a 6% return, demonstrating how returns compound over time as the investment value increases.
- Long-term investments, such as in retirement accounts, can benefit from compounding, potentially yielding significant returns over several decades.
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Compounding with Additional Contributions:
- Making regular contributions to savings can significantly impact long-term goals.
- The article illustrates the impact of regular contributions by using the daily compound interest calculator. It compares the outcome of a savings account with a 4% annual yield, starting with $10,000 and adding $100 monthly. The result after 10 years, compounded daily, is $29,648.
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Calculating Compound Interest:
- The article provides a formula for calculating compound interest: A = P(1 + r/n)^(nt).
- Key variables in the formula include A (ending amount), P (original balance), r (interest rate as a decimal), n (number of times interest is compounded), and t (time frame).
- An example is given where a $5,000 deposit in a savings account with a 3% annual interest rate, compounded monthly, results in an ending balance of $5,152 after one year.
This information empowers readers to understand the dynamics of savings, compound interest, and the impact of regular contributions on their financial goals.
