APY Calculator
Calculate the Annual Percentage Yield (APY) based on your interest rate and compounding frequency.
Understanding APY
APY stands for Annual Percentage Yield. It represents the real rate of return you earn on a deposit or investment over one year, accounting for the effect of compounding interest. The more frequently interest compounds, the higher the APY will be compared to the stated interest rate.
The formula is: APY = (1 + r/n)^n - 1, where r is the nominal interest rate and n is the number of compounding periods per year.
Frequently Asked Questions
Why is APY important?
APY gives you the true picture of how much you will earn on a deposit. It accounts for compounding, so two accounts with the same interest rate but different compounding frequencies will have different APYs. Always compare APYs when choosing between savings accounts or CDs.
What is the difference between APY and APR?
APR (Annual Percentage Rate) is the simple interest rate without compounding. APY includes the effect of compounding, making it slightly higher than APR for the same nominal rate. APR is commonly used for loans, while APY is used for savings and deposit accounts.
What factors affect APY?
Two main factors affect APY: the nominal interest rate and the compounding frequency. A higher interest rate produces a higher APY. More frequent compounding (daily vs. monthly) also increases APY because you earn interest on previously earned interest more often.
How do I use an APY calculator?
Enter the stated interest rate on your account and select how often your bank compounds interest. The calculator will show you the effective annual yield. Compare this number across different accounts to find the best return on your savings.
Can APY change over time?
Yes. For variable-rate accounts like savings accounts, the bank can change the rate at any time based on market conditions. For fixed-rate products like CDs, the APY is locked in for the term of the deposit.
How do taxes affect APY?
The APY shows your pre-tax return. Interest earned on savings accounts and CDs is typically taxed as ordinary income. Your actual after-tax return will be lower depending on your tax bracket. Some accounts like Roth IRAs allow tax-free growth.