What Is APY, and How Does It Impact Your Savings Account?


APY, or annual percentage yield, is an essential concept in personal finance. By calculating the interest earned on your savings accounts, certificates of deposit, and other interest-bearing accounts, APY can aid in determining the most profitable places to allocate your funds.

Understanding APY is integral in making informed decisions regarding your finances, as it allows you to optimize your returns and achieve your savings and investment goals. Armed with this knowledge, you can make wise choices and increase the value of your savings and investments.

What does APY mean?

The term APY is utilized in finance to gauge the annual interest rate garnered from an investment or deposit account. APY is deemed a more precise reflection of the total return than a simple interest rate since it accounts for the effect of compounding interest.

The calculation of APY incorporates various components such as the interest rate, compounding frequency, and investment or deposit term. This formula empowers savers and investors to evaluate the yields of different financial products like certificates of deposit (CDs), savings accounts, money market accounts, and even high-yield checking accounts. By comparing APY rates, you can make informed decisions about where to allocate your funds to achieve your savings and investment goals.


APY and APR are two distinct financial terms used to gauge interest rates. However, the two are calculated differently and apply to different types of financial products.

APR, which stands for annual percentage rate, is a metric utilized to describe the interest rate charged on loans and other lending products. This financial tool represents the annual cost of borrowing money and is calculated by dividing the total interest charged by the loan amount.

On the other hand, APY, or annual percentage yield, is used to define the annual interest rate earned on savings and investment products. The distinguishing factor of APY is that it takes into account the effect of accumulated interest, rendering it a more accurate measure of the total return on a savings account.

Consequently, the APR on a credit card or loan might be lower than the APY of a savings or investment product, even though the APR represents a cost while the APY represents a gain.

How does APY work?

Annual percentage yield (APY) works by taking into account the effect of compounding interest. Compounding interest refers to the practice of adding the interest earned on a savings account back into the account, which then earns interest on the original deposit plus the previously earned interest.

Over time, compound interest can significantly increase the return on a savings account. For example, if you invest $1,000 in a savings account with a 5% APY that compounds annually, after one year, you would earn $50 in interest.

However, if the interest compounds quarterly, you would earn $51.14, and if it’s compounded monthly, you would earn $51.16. This demonstrates how the frequency of compounding interest affects the total return on savings accounts.

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How to Calculate APY

Calculating APY is a straightforward process that requires just a few pieces of information. To calculate the APY on a savings account, you will need to know the interest rate, compounding frequency, and the length of the investment or deposit term.

To calculate APY, you can use the following formula:

APY = (1 + r/n)^n – 1


  • r = the annual interest rate
  • n = the number of times the interest is compounded per year

For example, if you invest $1,000 in a savings account with a 5% APY that compounds monthly for one year, the calculation would be:

APY = (1 + 0.05/12)^12 – 1 APY = 0.0512 or 5.12%

In this case, your total return on the investment would be $51.16.

Real-life examples can help illustrate how to calculate APY in practice. For instance, consider a certificate of deposit with a $10,000 balance and a 2.5% annual interest rate that compounds quarterly for three years. To calculate the APY for this investment, you would use the following formula:

APY = (1 + 0.025/4)^4*3 – 1 APY = 0.064 or 6.4%

This means that after three years, the investment would have grown to $11,947.96, with an overall return of $1,947.96. By comparing the APY of different investment options, you can identify which ones offer the best return on your money.

Is APY variable or fixed?

For savings or money market accounts, the APY is typically variable. This means that the APY is linked to an underlying benchmark rate, and if that rate changes, your APY can change as well. For example, if the Federal Reserve reduces interest rates, banks may lower the APY paid to savers.

On the other hand, with certificate of deposit (CD) accounts, the APY is usually fixed. CDs are time deposit accounts where you agree to keep your money in the account for a set period, and in return, you earn a fixed interest rate until the CD reaches maturity.

How Compound Interest Works

Compound interest is the interest earned on both the principal and the interest already earned. In other words, it’s interest on interest.

Compound interest can have a significant impact on savings and investment returns over time. The longer the compounding period, the more significant the impact. For example, if you invest $10,000 at an APY of 5% with daily compounding, after one year, you will have earned $512.33 in interest.

However, if you keep the same investment for 10 years, you will have earned $6,381.81 in interest. This is because the interest earned each year is added to the principal, which then earns even more interest the next year.

Understanding how compound interest affects APY is essential when evaluating different financial products. Some products may have daily, monthly, or even annual compounding periods, which can affect the overall APY. Be sure to consider the compounding period when comparing different financial products.

APY vs. Interest Rate

Although often used interchangeably, APY and interest rate are not the same. While the interest rate indicates the rate at which interest is earned on a principal amount, APY considers the effect of compounding over time.

To illustrate, suppose you invest $10,000 at an interest rate of 5% with no compounding. In one year, you will earn $500 in interest. However, with daily compounding, the APY will be slightly higher than 5%, and the amount earned in one year will be even greater.

Understanding the difference between APY and interest rate is critical when assessing financial products. APY provides a more accurate picture of the total earnings potential of a financial product, while interest rate serves as a baseline for comparison.

To select the product that best suits your financial objectives and needs, examine both the APY and interest rate, as well as any fees or minimum balance requirements associated with savings and investment products.

How to Get the Best APY

Getting the best APY requires careful consideration and comparison of different financial products. Here are some tips to help you find and select the best APY:

  • Shop around: Don’t settle for the first savings account or investment opportunity that you come across. Take the time to research and compare different options.
  • Look for high-yield accounts: High-yield savings accounts, money market accounts, and CDs often offer higher APYs than traditional savings accounts. Some checking accounts even offer high yields nowadays.
  • Consider online banks: Online banks typically have lower overhead costs and can offer higher APYs than brick-and-mortar banks and credit unions.
  • Watch out for fees: Some savings accounts may have fees that can eat into your earnings. Be sure to read the fine print and understand any fees associated with the account.
  • Check minimum balance requirements: Some accounts may require a minimum balance to earn the advertised APY. Make sure you can meet the minimum balance requirement before opening the account.

Strategies for Maximizing APY Returns

  • Take advantage of compound interest: The more frequently interest is compounded, the more money you can earn. Look for accounts that compound interest daily or monthly.
  • Consider long-term investments: Longer investment terms often come with higher APYs. If you can afford to tie up your money for a longer period, a CD or other long-term investment may be a suitable option.
  • Make regular contributions: Regularly adding to your savings or investment account can help boost your overall returns.


What is APY for a savings account?

APY is a measure of the total amount of interest earned on a savings account over one year, expressed as a percentage of the account balance. APY takes into account the compounding of interest. This means that interest earned on the account is added to the balance, and subsequent interest is then calculated on the new, higher balance.

This compounding effect means that the APY is usually higher than the simple interest rate quoted by the bank or credit union. When comparing high yield savings accounts, it’s essential to look at the APY rather than the simple interest rate to get a better understanding of the total interest you can earn on your savings over time.

See also: Simple vs. Compound Interest

What is a good APY?

Generally speaking, a good APY for a savings account or money market account is one that offers a rate of return that exceeds the rate of inflation. This ensures that your savings are growing in real terms and not losing value due to inflation.

Can APY change over time?

Yes, APY can change over time. Banks and credit unions adjust their APY rates based on various factors such as changes in market conditions, the Federal Reserve’s monetary policy, and their own business needs.

In some cases, banks may offer promotional APYs that are only available for a limited time or are tied to certain conditions, such as maintaining a minimum balance or opening a new account. It’s essential to regularly check the APY on your bank account and compare it to other options in the market to ensure you’re getting the best rate possible.

APYs on savings accounts are variable rates, and they can fluctuate frequently, so it’s essential to monitor them regularly to make informed decisions about your savings.

Bottom Line

Understanding APY is crucial for making informed financial decisions. APY allows you to compare different savings and investment products and determine which ones will provide the best returns over time.

By taking into account factors such as compounding frequency, fees, and minimum balance requirements, you can make the most of your money and achieve your financial goals.

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