How to find the after-fee APY of a savings account?

Asked by: Adam Lewis

How do you find the APY of a savings account?

APY is calculated using this formula: APY= (1 + r/n )n – 1, where “r” is the stated annual interest rate and “n” is the number of compounding periods each year. APY is also sometimes called the effective annual rate, or EAR.

How do you calculate APY example?

If you deposited $100 for one year at 5% interest and your deposit was compounded quarterly, at the end of the year you would have $105.09. If you had been paid simple interest, you would have had $105. The APY would be (1 + . 05/4) * 4 – 1 = .

How do you calculate a monthly APY?

Monthly Interest Rate Calculation Example

  1. Convert the annual rate from a percent to a decimal by dividing by 100: 10/100 = 0.10.
  2. Now divide that number by 12 to get the monthly interest rate in decimal form: 0.10/12 = 0.0083.